For packaging. Moved to formal-model branch.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+++ /dev/null
-pan
-pan.*
-urcu.spin.trail
+++ /dev/null
-#define queue_has_entry (queue[0] == 1 || queue[1] == 1)
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#CFLAGS=-DHASH64 -DREACH
-CFLAGS=-DHASH64
-
-#try pan -i to get the smallest trace.
-
-SPINFILE=futex.spin
-SPINFILE_FAIR=futex.spin
-
-default:
- make futex_progress | tee futex_progress.log
- make futex_progress_no_wake | tee futex_progress_no_wake.log
- make futex_progress_late_dec | tee futex_progress_late_dec.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep error *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w19
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-futex_progress: clean futex_ltl run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-futex_progress_no_wake: clean futex_ltl futex_progress_no_wake_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-futex_progress_no_wake_define:
- cp futex_progress_no_wake.define .input.define
-
-futex_progress_late_dec: clean futex_ltl futex_progress_late_dec_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-futex_progress_late_dec_define:
- cp futex_progress_late_dec.define .input.define
-
-futex_ltl:
- touch .input.define
- cat DEFINES > pan.ltl
- cat .input.define >> pan.ltl
- spin -f "!(`cat futex.ltl | grep -v ^//`)" >> pan.ltl
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w19
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-run_weak_fair: pan_fair
- ./pan_fair -a -f -v -c1 -X -m10000000 -w20
-
-pan_fair: pan_fair.c
- gcc -w ${CFLAGS} -o pan_fair pan_fair.c
-
-pan_fair.c: pan.ltl ${SPINFILE_FAIR}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE_FAIR} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
- mv pan.c pan_fair.c
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-([] <> ((!np_) || (!queue_has_entry)))
+++ /dev/null
-/*
- * futex.spin: Promela code to validate futex wakeup algorithm.
- *
- * Algorithm verified :
- *
- * queue = 0;
- * fut = 0;
- * runvar = 0;
- *
- * Waker
- * queue = 1;
- * if (fut == -1) {
- * fut = 0;
- * }
- *
- * Waiter
- * while (1) {
- * progress:
- * fut = fut - 1;
- * if (queue == 1) {
- * fut = 0;
- * } else {
- * if (fut == -1) {
- * while (fut == -1) { }
- * }
- * }
- * queue = 0;
- * }
- *
- * if queue = 1, then !_np
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-#define get_pid() (_pid)
-
-int queue[2] = 0;
-int fut = 0;
-
-active [2] proctype waker()
-{
- assert(get_pid() < 2);
-
- queue[get_pid()] = 1;
-
- if
- :: (fut == -1) ->
- fut = 0;
- :: else ->
- skip;
- fi;
-
- queue[get_pid()] = 1;
-
- if
- :: (fut == -1) ->
- fut = 0;
- :: else ->
- skip;
- fi;
-
-#ifdef INJ_QUEUE_NO_WAKE
- queue[get_pid()] = 1;
-#endif
-}
-
-
-active proctype waiter()
-{
- do
- :: 1 ->
-#ifndef INJ_LATE_DEC
- fut = fut - 1;
-#endif
- if
- :: (queue[0] == 1 || queue[1] == 1) ->
-#ifndef INJ_LATE_DEC
- fut = 0;
-#endif
- skip;
- :: else ->
-#ifdef INJ_LATE_DEC
- fut = fut - 1;
-#endif
- if
- :: (fut == -1) ->
- do
- :: 1 ->
- if
- :: (fut == -1) ->
- skip;
- :: else ->
- break;
- fi;
- od;
- :: else ->
- skip;
- fi;
- fi;
-progress:
- if
- :: queue[0] == 1 ->
- queue[0] = 0;
- fi;
- if
- :: queue[1] == 1 ->
- queue[1] = 0;
- fi;
- od;
-}
+++ /dev/null
-#define INJ_LATE_DEC
+++ /dev/null
-#define INJ_QUEUE_NO_WAKE
+++ /dev/null
-#define read_one_is_one (read_one == 1)
-#define read_two_is_one (read_two == 1)
-#define read_two_done (read_two != 2)
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#CFLAGS=-DHASH64 -DREACH
-CFLAGS=-DHASH64
-
-#try pan -i to get the smallest trace.
-
-SPINFILE=mem.spin
-
-default:
- make read_order | tee read_order.log
- make read_order_no_wmb | tee read_order_no_wmb.log
- make read_order_no_rmb | tee read_order_no_rmb.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep error *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000 -w19
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order: clean read_order_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_rmb: clean read_order_ltl read_order_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_rmb_define:
- cp read_order_no_rmb.define .input.define
-
-read_order_no_wmb: clean read_order_ltl read_order_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_wmb_define:
- cp read_order_no_wmb.define .input.define
-
-read_order_ltl:
- touch .input.define
- cat DEFINES > pan.ltl
- cat .input.define >> pan.ltl
- spin -f "!(`cat read_order.ltl | grep -v ^//`)" >> pan.ltl
-
-run: pan
- ./pan -a -v -c1 -X -m10000 -w19
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a mem.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with out-of-order memory
- * and out-of-order instruction scheduling.
- *
- * Algorithm verified :
- *
- * alpha = 0;
- * beta = 0;
- *
- * Process A Process B
- * alpha = 1; x = beta;
- * wmb(); rmb();
- * beta = 1; y = alpha;
- *
- * if x = 1, then y will = 1 when it is read.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) \
- (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-inline ooo_mem()
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(alpha, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(beta, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(alpha, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(beta, get_pid());
- }
-}
-
-/* must consume all prior read tokens */
-inline smp_rmb()
-{
- atomic {
- /* todo : consume all read tokens .. ? */
- CACHE_READ_FROM_MEM(alpha, get_pid());
- CACHE_READ_FROM_MEM(beta, get_pid());
- }
-}
-
-/* must consume all prior write tokens */
-inline smp_wmb()
-{
- atomic {
- CACHE_WRITE_TO_MEM(alpha, get_pid());
- CACHE_WRITE_TO_MEM(beta, get_pid());
- }
-}
-
-/* sync_core() must consume all prior read and write tokens, including rmb/wmb
- * tokens */
-
-/* must consume all prior read and write tokens */
-inline smp_mb()
-{
- atomic {
- smp_wmb();
- /* sync_core() */
- smp_rmb();
- }
-}
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, alpha, 0);
-DECLARE_CACHED_VAR(byte, beta, 0);
-
-/* value 2 is uninitialized */
-byte read_one = 2;
-byte read_two = 2;
-
-/*
- * Bit encoding, proc_one_produced :
- */
-
-#define P1_PROD_NONE (1 << 0)
-
-#define P1_READ_ONE (1 << 1)
-#define P1_RMB (1 << 2)
-#define P1_READ_TWO (1 << 3)
-
-/* Only need a single color. */
-byte proc_one_produced;
-
-active proctype test_proc_one()
-{
- assert(get_pid() < NR_PROCS);
-
- PRODUCE_TOKENS(proc_one_produced, P1_PROD_NONE);
-#ifdef NO_RMB
- PRODUCE_TOKENS(proc_one_produced, P1_RMB);
-#endif
-
- do
- :: CONSUME_TOKENS(proc_one_produced,
- P1_PROD_NONE, P1_READ_ONE) ->
- ooo_mem();
- read_one = READ_CACHED_VAR(beta);
- ooo_mem();
- PRODUCE_TOKENS(proc_one_produced, P1_READ_ONE);
- :: CONSUME_TOKENS(proc_one_produced,
- P1_READ_ONE, P1_RMB) ->
- smp_rmb();
- PRODUCE_TOKENS(proc_one_produced, P1_RMB);
- :: CONSUME_TOKENS(proc_one_produced,
- P1_RMB, P1_READ_TWO) ->
- ooo_mem();
- read_two = READ_CACHED_VAR(alpha);
- ooo_mem();
- PRODUCE_TOKENS(proc_one_produced, P1_READ_TWO);
- :: CONSUME_TOKENS(proc_one_produced,
- P1_PROD_NONE | P1_READ_ONE | P1_RMB
- | P1_READ_TWO, 0) ->
- break;
- od;
-
- //CLEAR_TOKENS(proc_one_produced,
- // P1_PROD_NONE | P1_READ_ONE | P1_RMB | P1_READ_TWO);
-
- // test : [] (read_one == 1 -> read_two == 1)
- assert(read_one != 1 || read_two == 1);
-}
-
-
-/*
- * Bit encoding, proc_two_produced :
- */
-
-#define P2_PROD_NONE (1 << 0)
-
-#define P2_WRITE_ONE (1 << 1)
-#define P2_WMB (1 << 2)
-#define P2_WRITE_TWO (1 << 3)
-
-/* Only need a single color. */
-byte proc_two_produced;
-
-active proctype test_proc_two()
-{
- assert(get_pid() < NR_PROCS);
-
- PRODUCE_TOKENS(proc_two_produced, P2_PROD_NONE);
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_two_produced, P2_WMB);
-#endif
-
- do
- :: CONSUME_TOKENS(proc_two_produced,
- P2_PROD_NONE, P2_WRITE_ONE) ->
- ooo_mem();
- WRITE_CACHED_VAR(alpha, 1);
- ooo_mem();
- PRODUCE_TOKENS(proc_two_produced, P2_WRITE_ONE);
- :: CONSUME_TOKENS(proc_two_produced,
- P2_WRITE_ONE, P2_WMB) ->
- smp_wmb();
- PRODUCE_TOKENS(proc_two_produced, P2_WMB);
- :: CONSUME_TOKENS(proc_two_produced,
- P2_WMB, P2_WRITE_TWO) ->
- ooo_mem();
- WRITE_CACHED_VAR(beta, 1);
- ooo_mem();
- PRODUCE_TOKENS(proc_two_produced, P2_WRITE_TWO);
- :: CONSUME_TOKENS(proc_two_produced,
- P2_PROD_NONE | P2_WRITE_ONE
- | P2_WMB | P2_WRITE_TWO, 0) ->
- break;
- od;
-
- //CLEAR_TOKENS(proc_two_produced,
- // P2_PROD_NONE | P2_WRITE_ONE | P2_WMB | P2_WRITE_TWO);
-}
+++ /dev/null
-[] (read_one_is_one -> (<> read_two_is_one))
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
+++ /dev/null
-#define first_read_updated (first_read[0] == 6)
-#define second_read_updated (second_read[0] == 4)
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-CFLAGS=-DHASH64
-
-SPINFILE=mem.spin
-
-default:
- make read_order | tee read_order.log
- make read_order_no_wmb | tee read_order_no_wmb.log
- make read_order_no_rmb | tee read_order_no_rmb.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep error *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000 -w19
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order: clean read_order_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_rmb: clean read_order_ltl read_order_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_rmb_define:
- cp read_order_no_rmb.define .input.define
-
-read_order_no_wmb: clean read_order_ltl read_order_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_wmb_define:
- cp read_order_no_wmb.define .input.define
-
-read_order_ltl:
- touch .input.define
- cat DEFINES > pan.ltl
- cat .input.define >> pan.ltl
- spin -f "!(`cat read_order.ltl | grep -v ^//`)" >> pan.ltl
-
-run: pan
- ./pan -a -v -c1 -X -m10000 -w19
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a mem.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/*
- * Out-of-order memory model _without_ out-of-order instruction scheduling.
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-inline smp_rmb()
-{
- atomic {
- CACHE_READ_FROM_MEM(alpha, get_pid());
- CACHE_READ_FROM_MEM(beta, get_pid());
- }
-}
-
-inline smp_wmb()
-{
- atomic {
- CACHE_WRITE_TO_MEM(alpha, get_pid());
- CACHE_WRITE_TO_MEM(beta, get_pid());
- }
-}
-
-inline smp_mb()
-{
- atomic {
- smp_wmb();
- smp_rmb();
- }
-}
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, alpha, 0);
-DECLARE_CACHED_VAR(byte, beta, 0);
-
-inline ooo_mem()
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(alpha, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(beta, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(alpha, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(beta, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-
-byte first_read[NR_READERS];
-byte second_read[NR_READERS];
-
-active [NR_READERS] proctype test_reader()
-{
- assert(get_pid() < NR_PROCS);
-
- ooo_mem();
- first_read[get_readerid()] = READ_CACHED_VAR(beta);
- ooo_mem();
-#ifndef NO_RMB
- smp_rmb();
- ooo_mem();
-#endif
- second_read[get_readerid()] = READ_CACHED_VAR(alpha);
- ooo_mem();
- // test : [] (first_read == 6 -> <> second_read == 4)
- assert(first_read[get_readerid()] != 6
- || second_read[get_readerid()] == 4);
-}
-
-#define get_writerid() (get_readerid() + NR_READERS)
-
-active [NR_WRITERS] proctype test_writer()
-{
- byte i;
-
- assert(get_pid() < NR_PROCS);
-
- ooo_mem();
- WRITE_CACHED_VAR(alpha, 4);
- ooo_mem();
-#ifndef NO_WMB
- smp_wmb();
- ooo_mem();
-#endif
- WRITE_CACHED_VAR(beta, 6);
- ooo_mem();
-}
+++ /dev/null
-[] (first_read_updated -> <> second_read_updated)
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
+++ /dev/null
-#define read_one_is_zero (read_one == 0)
-#define read_two_is_zero (read_two == 0)
-#define read_one_is_one (read_one == 1)
-#define read_two_is_one (read_two == 1)
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#CFLAGS=-DHASH64 -DREACH
-CFLAGS=-DHASH64
-
-#try pan -i to get the smallest trace.
-
-SPINFILE=mem.spin
-
-default:
- make read_order | tee read_order.log
- make read_order_no_wmb | tee read_order_no_wmb.log
- make read_order_no_rmb | tee read_order_no_rmb.log
- make read_order_no_sync | tee read_order_no_sync.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep error *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000 -w19
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order: clean read_order_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_sync: clean read_order_ltl read_order_no_sync_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_sync_define:
- cp read_order_no_sync.define .input.define
-
-read_order_no_rmb: clean read_order_ltl read_order_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_rmb_define:
- cp read_order_no_rmb.define .input.define
-
-read_order_no_wmb: clean read_order_ltl read_order_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-read_order_no_wmb_define:
- cp read_order_no_wmb.define .input.define
-
-read_order_ltl:
- touch .input.define
- cat DEFINES > pan.ltl
- cat .input.define >> pan.ltl
- spin -f "!(`cat read_order.ltl | grep -v ^//`)" >> pan.ltl
-
-run: pan
- ./pan -a -v -c1 -X -m10000 -w19
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a mem.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with out-of-order memory
- * and out-of-order instruction scheduling.
- *
- * Algorithm verified :
- *
- * alpha = 0;
- * beta = 0;
- * x = 1;
- * y = 1;
- *
- * Process A Process B
- * alpha = 1; beta = 1;
- * mb(); mb();
- * x = beta; y = alpha;
- *
- * if x = 0, then y != 0
- * if y = 0, then x != 0
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) \
- (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-inline ooo_mem()
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(alpha, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(beta, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(alpha, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(beta, get_pid());
- }
-}
-
-/* must consume all prior read tokens */
-inline smp_rmb()
-{
- atomic {
- /* todo : consume all read tokens .. ? */
- CACHE_READ_FROM_MEM(alpha, get_pid());
- CACHE_READ_FROM_MEM(beta, get_pid());
- }
-}
-
-/* must consume all prior write tokens */
-inline smp_wmb()
-{
- atomic {
- CACHE_WRITE_TO_MEM(alpha, get_pid());
- CACHE_WRITE_TO_MEM(beta, get_pid());
- }
-}
-
-/* sync_core() must consume all prior read and write tokens, including rmb/wmb
- * tokens */
-
-/* must consume all prior read and write tokens */
-inline smp_mb()
-{
- atomic {
- smp_wmb();
- /* sync_core() */
- smp_rmb();
- }
-}
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, alpha, 0);
-DECLARE_CACHED_VAR(byte, beta, 0);
-
-byte read_one = 1;
-byte read_two = 1;
-
-/*
- * Bit encoding, proc_one_produced :
- */
-
-#define P1_PROD_NONE (1 << 0)
-
-#define P1_WRITE (1 << 1)
-#define P1_WMB (1 << 2)
-#define P1_SYNC_CORE (1 << 3)
-#define P1_RMB (1 << 4)
-#define P1_READ (1 << 5)
-
-int proc_one_produced;
-
-active proctype test_proc_one()
-{
- assert(get_pid() < NR_PROCS);
-
- PRODUCE_TOKENS(proc_one_produced, P1_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_one_produced, P1_WMB);
-#endif
-#ifdef NO_RMB
- PRODUCE_TOKENS(proc_one_produced, P1_RMB);
-#endif
-#ifdef NO_SYNC
- PRODUCE_TOKENS(proc_one_produced, P1_SYNC_CORE);
-#endif
-
- do
- :: CONSUME_TOKENS(proc_one_produced, P1_PROD_NONE, P1_WRITE) ->
- ooo_mem();
- WRITE_CACHED_VAR(alpha, 1);
- ooo_mem();
- PRODUCE_TOKENS(proc_one_produced, P1_WRITE);
- :: CONSUME_TOKENS(proc_one_produced, P1_WRITE, P1_WMB) ->
- smp_wmb();
- PRODUCE_TOKENS(proc_one_produced, P1_WMB);
- :: CONSUME_TOKENS(proc_one_produced, P1_WRITE | P1_WMB, P1_SYNC_CORE) ->
- /* sync_core(); */
- PRODUCE_TOKENS(proc_one_produced, P1_SYNC_CORE);
- :: CONSUME_TOKENS(proc_one_produced, P1_SYNC_CORE, P1_RMB) ->
- smp_rmb();
- PRODUCE_TOKENS(proc_one_produced, P1_RMB);
- :: CONSUME_TOKENS(proc_one_produced, P1_RMB | P1_SYNC_CORE, P1_READ) ->
- ooo_mem();
- read_one = READ_CACHED_VAR(beta);
- ooo_mem();
- PRODUCE_TOKENS(proc_one_produced, P1_READ);
- :: CONSUME_TOKENS(proc_one_produced, P1_PROD_NONE | P1_WRITE
- | P1_WMB | P1_SYNC_CORE | P1_RMB | P1_READ, 0) ->
- break;
- od;
-
- //CLEAR_TOKENS(proc_one_produced,
- // P1_PROD_NONE | P1_WRITE | P1_WMB | P1_SYNC_CORE | P1_RMB |
- // P2_READ);
-
- // test : [] (read_one == 0 -> read_two != 0)
- // test : [] (read_two == 0 -> read_one != 0)
- assert(!(read_one == 0 && read_two == 0));
-}
-
-
-/*
- * Bit encoding, proc_two_produced :
- */
-
-#define P2_PROD_NONE (1 << 0)
-
-#define P2_WRITE (1 << 1)
-#define P2_WMB (1 << 2)
-#define P2_SYNC_CORE (1 << 3)
-#define P2_RMB (1 << 4)
-#define P2_READ (1 << 5)
-
-int proc_two_produced;
-
-active proctype test_proc_two()
-{
- assert(get_pid() < NR_PROCS);
-
- PRODUCE_TOKENS(proc_two_produced, P2_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_two_produced, P2_WMB);
-#endif
-#ifdef NO_RMB
- PRODUCE_TOKENS(proc_two_produced, P2_RMB);
-#endif
-#ifdef NO_SYNC
- PRODUCE_TOKENS(proc_two_produced, P2_SYNC_CORE);
-#endif
-
- do
- :: CONSUME_TOKENS(proc_two_produced, P2_PROD_NONE, P2_WRITE) ->
- ooo_mem();
- WRITE_CACHED_VAR(beta, 1);
- ooo_mem();
- PRODUCE_TOKENS(proc_two_produced, P2_WRITE);
- :: CONSUME_TOKENS(proc_two_produced, P2_WRITE, P2_WMB) ->
- smp_wmb();
- PRODUCE_TOKENS(proc_two_produced, P2_WMB);
- :: CONSUME_TOKENS(proc_two_produced, P2_WRITE | P2_WMB, P2_SYNC_CORE) ->
- /* sync_core(); */
- PRODUCE_TOKENS(proc_two_produced, P2_SYNC_CORE);
- :: CONSUME_TOKENS(proc_two_produced, P2_SYNC_CORE, P2_RMB) ->
- smp_rmb();
- PRODUCE_TOKENS(proc_two_produced, P2_RMB);
- :: CONSUME_TOKENS(proc_two_produced, P2_SYNC_CORE | P2_RMB, P2_READ) ->
- ooo_mem();
- read_two = READ_CACHED_VAR(alpha);
- ooo_mem();
- PRODUCE_TOKENS(proc_two_produced, P2_READ);
- :: CONSUME_TOKENS(proc_two_produced, P2_PROD_NONE | P2_WRITE
- | P2_WMB | P2_SYNC_CORE | P2_RMB | P2_READ, 0) ->
- break;
- od;
-
- //CLEAR_TOKENS(proc_two_produced,
- // P2_PROD_NONE | P2_WRITE | P2_WMB | P2_SYNC_CORE | P2_RMB |
- // P2_READ);
-
- // test : [] (read_one == 0 -> read_two != 0)
- // test : [] (read_two == 0 -> read_one != 0)
- assert(!(read_one == 0 && read_two == 0));
-}
+++ /dev/null
-[] (read_one_is_one || read_two_is_one)
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_SYNC
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
+++ /dev/null
-#define refcount_gt_one (refcount > 1)
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#CFLAGS=-DHASH64 -DREACH
-CFLAGS=-DHASH64
-
-#try pan -i to get the smallest trace.
-
-SPINFILE=mem.spin
-SPINFILE_FAIR=mem-progress.spin
-
-default:
- make refcount | tee refcount.log
- make lock_progress | tee lock_progress.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep error *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000 -w19
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-refcount: clean refcount_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-refcount_ltl:
- touch .input.define
- cat DEFINES > pan.ltl
- cat .input.define >> pan.ltl
- spin -f "!(`cat refcount.ltl | grep -v ^//`)" >> pan.ltl
-
-lock_progress: clean lock_progress_ltl run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-lock_progress_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat lock_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-run: pan
- ./pan -a -v -c1 -X -m10000 -w19
-
-run_weak_fair: pan_fair
- ./pan_fair -a -f -v -c1 -X -m10000000 -w20
-
-pan_fair: pan_fair.c
- gcc -w ${CFLAGS} -o pan_fair pan_fair.c
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan_fair.c: pan.ltl ${SPINFILE_FAIR}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE_FAIR} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
- mv pan.c pan_fair.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-byte lock = 0;
-byte refcount = 0;
-
-inline spin_lock(lock)
-{
- do
- :: 1 -> atomic {
- if
- :: (lock) ->
- skip;
- :: else ->
- lock = 1;
- break;
- fi;
- }
- od;
-}
-
-inline spin_unlock(lock)
-{
- lock = 0;
-}
-
-proctype proc_A()
-{
- do
- :: 1->
-progress_A:
- spin_lock(lock);
- refcount = refcount + 1;
- refcount = refcount - 1;
- spin_unlock(lock);
- od;
-}
-
-proctype proc_B()
-{
- do
- :: 1->
- spin_lock(lock);
- refcount = refcount + 1;
- refcount = refcount - 1;
- spin_unlock(lock);
- od;
-}
-
-init
-{
- run proc_A();
- run proc_B();
-}
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a mem.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-byte lock = 0;
-byte refcount = 0;
-
-inline spin_lock(lock)
-{
- do
- :: 1 -> atomic {
- if
- :: (lock) ->
- skip;
- :: else ->
- lock = 1;
- break;
- fi;
- }
- od;
-}
-
-inline spin_unlock(lock)
-{
- lock = 0;
-}
-
-proctype proc_X()
-{
- do
- :: 1 ->
- spin_lock(lock);
- refcount = refcount + 1;
- refcount = refcount - 1;
- spin_unlock(lock);
- od;
-}
-
-init
-{
- run proc_X();
- run proc_X();
-}
+++ /dev/null
-[] (!(refcount_gt_one))
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
+++ /dev/null
-#define refcount_gt_one (refcount > 1)
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#CFLAGS=-DHASH64 -DREACH
-CFLAGS=-DHASH64
-
-#try pan -i to get the smallest trace.
-
-SPINFILE=mem.spin
-SPINFILE_FAIR=mem-progress.spin
-
-default:
- make refcount | tee refcount.log
- make refcount_4_bits_per_byte | tee refcount_4_bits_per_byte.log
- make lock_progress | tee lock_progress.log
- make lock_progress_4_bits_per_byte | tee lock_progress_4_bits_per_byte.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep error *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w19
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-refcount: clean refcount_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-refcount_ltl:
- touch .input.define
- cat DEFINES > pan.ltl
- cat .input.define >> pan.ltl
- spin -f "!(`cat refcount.ltl | grep -v ^//`)" >> pan.ltl
-
-refcount_4_bits_per_byte: clean refcount_ltl config_4_bits_per_byte_define run
-
-lock_progress: clean lock_progress_ltl run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-lock_progress_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat lock_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-lock_progress_4_bits_per_byte: clean lock_progress_ltl config_4_bits_per_byte_define run
-
-config_4_bits_per_byte_define:
- cp config_4_bits_per_byte.define .input.define
-
-run: pan
- ./pan -a -v -c1 -X -m1000000 -w19
-
-run_weak_fair: pan_fair
- ./pan_fair -a -f -v -c1 -X -m1000000 -w20
-
-pan_fair: pan_fair.c
- gcc -w ${CFLAGS} -DNFAIR=4 -o pan_fair pan_fair.c
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan_fair.c: pan.ltl ${SPINFILE_FAIR}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE_FAIR} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
- mv pan.c pan_fair.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat DEFINES > .input.spin
- cat .input.define >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-#define CONFIG_BITS_PER_BYTE 4
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* 16 CPUs max (byte has 8 bits, divided in two) */
-
-#ifndef CONFIG_BITS_PER_BYTE
-#define BITS_PER_BYTE 8
-#else
-// test progress failure with shorter byte size. Will fail with 5 proc.
-#define BITS_PER_BYTE CONFIG_BITS_PER_BYTE
-#endif
-
-#define HBPB (BITS_PER_BYTE / 2) /* 4 */
-#define HMASK ((1 << HBPB) - 1) /* 0x0F */
-
-/* for byte type */
-#define LOW_HALF(val) ((val) & HMASK)
-#define LOW_HALF_INC 1
-
-#define HIGH_HALF(val) ((val) & (HMASK << HBPB))
-#define HIGH_HALF_INC (1 << HBPB)
-
-byte lock = 0;
-byte refcount = 0;
-
-inline spin_lock(lock, ticket)
-{
- atomic {
- ticket = HIGH_HALF(lock) >> HBPB;
- lock = lock + HIGH_HALF_INC; /* overflow expected */
- }
-
- do
- :: 1 ->
- if
- :: (LOW_HALF(lock) == ticket) ->
- break;
- :: else ->
- skip;
- fi;
- od;
-}
-
-inline spin_unlock(lock)
-{
- lock = HIGH_HALF(lock) | LOW_HALF(lock + LOW_HALF_INC);
-}
-
-proctype proc_A()
-{
- byte ticket;
-
- do
- :: 1 ->
-progress_A:
- spin_lock(lock, ticket);
- refcount = refcount + 1;
- refcount = refcount - 1;
- spin_unlock(lock);
- od;
-}
-
-proctype proc_B()
-{
- byte ticket;
-
- do
- :: 1 ->
- spin_lock(lock, ticket);
- refcount = refcount + 1;
- refcount = refcount - 1;
- spin_unlock(lock);
- od;
-}
-
-init
-{
- run proc_A();
- run proc_B();
- run proc_B();
- run proc_B();
- run proc_B();
-}
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a mem.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* 16 CPUs max (byte has 8 bits, divided in two) */
-
-#ifndef CONFIG_BITS_PER_BYTE
-#define BITS_PER_BYTE 8
-#else
-#define BITS_PER_BYTE CONFIG_BITS_PER_BYTE
-#endif
-
-#define HBPB (BITS_PER_BYTE / 2) /* 4 */
-#define HMASK ((1 << HBPB) - 1) /* 0x0F */
-
-/* for byte type */
-#define LOW_HALF(val) ((val) & HMASK)
-#define LOW_HALF_INC 1
-
-#define HIGH_HALF(val) ((val) & (HMASK << HBPB))
-#define HIGH_HALF_INC (1 << HBPB)
-
-byte lock = 0;
-byte refcount = 0;
-
-inline spin_lock(lock, ticket)
-{
- atomic {
- ticket = HIGH_HALF(lock) >> HBPB;
- lock = lock + HIGH_HALF_INC; /* overflow expected */
- }
-
- do
- :: 1 ->
- if
- :: (LOW_HALF(lock) == ticket) ->
- break;
- :: else ->
- skip;
- fi;
- od;
-}
-
-inline spin_unlock(lock)
-{
- lock = HIGH_HALF(lock) | LOW_HALF(lock + LOW_HALF_INC);
-}
-
-proctype proc_X()
-{
- byte ticket;
-
- do
- :: 1->
- spin_lock(lock, ticket);
- refcount = refcount + 1;
- refcount = refcount - 1;
- spin_unlock(lock);
- od;
-}
-
-init
-{
- run proc_X();
- run proc_X();
- run proc_X();
- run proc_X();
- run proc_X();
-}
+++ /dev/null
-[] (!(refcount_gt_one))
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-#define READER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64 -DCOLLAPSE
-#CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- #make urcu_free | tee urcu_free.log
- #make urcu_free_no_mb | tee urcu_free_no_mb.log
- #make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- #make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- #make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- #make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi-compress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-depth 7: Claim reached state 9 (line 1367)
-depth 136: Claim reached state 9 (line 1366)
-Depth= 115766 States= 1e+06 Transitions= 2.97e+08 Memory= 495.647 t= 461 R= 2e+03
-Depth= 115766 States= 2e+06 Transitions= 5.97e+08 Memory= 525.529 t= 939 R= 2e+03
-Depth= 115766 States= 3e+06 Transitions= 8.86e+08 Memory= 553.264 t= 1.41e+03 R= 2e+03
-pan: resizing hashtable to -w22.. done
-Depth= 115766 States= 4e+06 Transitions= 1.18e+09 Memory= 614.463 t= 1.87e+03 R= 2e+03
-Depth= 115766 States= 5e+06 Transitions= 1.48e+09 Memory= 644.541 t= 2.34e+03 R= 2e+03
-Depth= 115766 States= 6e+06 Transitions= 1.77e+09 Memory= 674.424 t= 2.8e+03 R= 2e+03
-Depth= 115766 States= 7e+06 Transitions= 2.07e+09 Memory= 701.865 t= 3.27e+03 R= 2e+03
-Depth= 115766 States= 8e+06 Transitions= 2.36e+09 Memory= 729.404 t= 3.75e+03 R= 2e+03
-Depth= 115766 States= 9e+06 Transitions= 2.66e+09 Memory= 757.920 t= 4.23e+03 R= 2e+03
-pan: resizing hashtable to -w24.. done
-Depth= 117893 States= 1e+07 Transitions= 2.95e+09 Memory= 909.846 t= 4.69e+03 R= 2e+03
-Depth= 117893 States= 1.1e+07 Transitions= 3.35e+09 Memory= 937.190 t= 5.31e+03 R= 2e+03
-Depth= 117893 States= 1.2e+07 Transitions= 3.69e+09 Memory= 964.826 t= 5.85e+03 R= 2e+03
-Depth= 117893 States= 1.3e+07 Transitions= 4.02e+09 Memory= 994.026 t= 6.37e+03 R= 2e+03
-Depth= 117893 States= 1.4e+07 Transitions= 4.32e+09 Memory= 1021.858 t= 6.84e+03 R= 2e+03
-Depth= 117893 States= 1.5e+07 Transitions= 4.63e+09 Memory= 1050.080 t= 7.33e+03 R= 2e+03
-Depth= 117893 States= 1.6e+07 Transitions= 4.95e+09 Memory= 1078.693 t= 7.83e+03 R= 2e+03
-Depth= 117893 States= 1.7e+07 Transitions= 5.24e+09 Memory= 1106.135 t= 8.28e+03 R= 2e+03
-Depth= 117893 States= 1.8e+07 Transitions= 5.54e+09 Memory= 1135.920 t= 8.74e+03 R= 2e+03
-Depth= 117893 States= 1.9e+07 Transitions= 5.82e+09 Memory= 1164.338 t= 9.19e+03 R= 2e+03
-Depth= 117893 States= 2e+07 Transitions= 6.12e+09 Memory= 1194.514 t= 9.66e+03 R= 2e+03
-Depth= 117893 States= 2.1e+07 Transitions= 6.42e+09 Memory= 1223.713 t= 1.01e+04 R= 2e+03
-Depth= 117893 States= 2.2e+07 Transitions= 6.72e+09 Memory= 1252.912 t= 1.06e+04 R= 2e+03
-Depth= 117893 States= 2.3e+07 Transitions= 7.01e+09 Memory= 1280.744 t= 1.11e+04 R= 2e+03
-Depth= 117893 States= 2.4e+07 Transitions= 7.3e+09 Memory= 1311.408 t= 1.15e+04 R= 2e+03
-Depth= 117893 States= 2.5e+07 Transitions= 7.61e+09 Memory= 1336.994 t= 1.2e+04 R= 2e+03
-Depth= 117893 States= 2.6e+07 Transitions= 7.89e+09 Memory= 1365.315 t= 1.24e+04 R= 2e+03
-Depth= 117893 States= 2.7e+07 Transitions= 8.35e+09 Memory= 1390.315 t= 1.32e+04 R= 2e+03
-Depth= 117893 States= 2.8e+07 Transitions= 8.84e+09 Memory= 1414.143 t= 1.4e+04 R= 2e+03
-Depth= 117893 States= 2.9e+07 Transitions= 9.64e+09 Memory= 1438.166 t= 1.53e+04 R= 2e+03
-Depth= 117893 States= 3e+07 Transitions= 1.02e+10 Memory= 1462.971 t= 1.62e+04 R= 2e+03
-Depth= 117893 States= 3.1e+07 Transitions= 1.06e+10 Memory= 1488.068 t= 1.69e+04 R= 2e+03
-Depth= 117893 States= 3.2e+07 Transitions= 1.14e+10 Memory= 1512.287 t= 1.82e+04 R= 2e+03
-Depth= 117893 States= 3.3e+07 Transitions= 1.24e+10 Memory= 1536.799 t= 1.99e+04 R= 2e+03
-Depth= 117893 States= 3.4e+07 Transitions= 1.27e+10 Memory= 1567.658 t= 2.04e+04 R= 2e+03
-pan: resizing hashtable to -w26.. done
-Depth= 117893 States= 3.5e+07 Transitions= 1.32e+10 Memory= 2089.424 t= 2.13e+04 R= 2e+03
-Depth= 117893 States= 3.6e+07 Transitions= 1.38e+10 Memory= 2116.768 t= 2.22e+04 R= 2e+03
-Depth= 117893 States= 3.7e+07 Transitions= 1.45e+10 Memory= 2142.158 t= 2.33e+04 R= 2e+03
-Depth= 117893 States= 3.8e+07 Transitions= 1.49e+10 Memory= 2170.674 t= 2.41e+04 R= 2e+03
-Depth= 117893 States= 3.9e+07 Transitions= 1.55e+10 Memory= 2197.725 t= 2.49e+04 R= 2e+03
-Depth= 117893 States= 4e+07 Transitions= 1.63e+10 Memory= 2219.014 t= 2.63e+04 R= 2e+03
-Depth= 117893 States= 4.1e+07 Transitions= 1.69e+10 Memory= 2242.061 t= 2.75e+04 R= 1e+03
-Depth= 117893 States= 4.2e+07 Transitions= 1.73e+10 Memory= 2269.600 t= 2.81e+04 R= 1e+03
-Depth= 117893 States= 4.3e+07 Transitions= 1.8e+10 Memory= 2295.967 t= 2.92e+04 R= 1e+03
-Depth= 117893 States= 4.4e+07 Transitions= 1.85e+10 Memory= 2323.213 t= 3e+04 R= 1e+03
-Depth= 117893 States= 4.5e+07 Transitions= 1.91e+10 Memory= 2348.994 t= 3.09e+04 R= 1e+03
-Depth= 117893 States= 4.6e+07 Transitions= 1.97e+10 Memory= 2374.190 t= 3.2e+04 R= 1e+03
-Depth= 117893 States= 4.7e+07 Transitions= 2.03e+10 Memory= 2399.483 t= 3.3e+04 R= 1e+03
-Depth= 117893 States= 4.8e+07 Transitions= 2.07e+10 Memory= 2428.486 t= 3.36e+04 R= 1e+03
-Depth= 117893 States= 4.9e+07 Transitions= 2.13e+10 Memory= 2454.951 t= 3.45e+04 R= 1e+03
-Depth= 117893 States= 5e+07 Transitions= 2.18e+10 Memory= 2482.686 t= 3.54e+04 R= 1e+03
-Depth= 117893 States= 5.1e+07 Transitions= 2.24e+10 Memory= 2509.151 t= 3.62e+04 R= 1e+03
-Depth= 117893 States= 5.2e+07 Transitions= 2.3e+10 Memory= 2535.420 t= 3.72e+04 R= 1e+03
-Depth= 117893 States= 5.3e+07 Transitions= 2.38e+10 Memory= 2560.518 t= 3.86e+04 R= 1e+03
-Depth= 117893 States= 5.4e+07 Transitions= 2.42e+10 Memory= 2586.592 t= 3.94e+04 R= 1e+03
-Depth= 117893 States= 5.5e+07 Transitions= 2.46e+10 Memory= 2610.713 t= 4e+04 R= 1e+03
-Depth= 117893 States= 5.6e+07 Transitions= 2.49e+10 Memory= 2638.545 t= 4.06e+04 R= 1e+03
-Depth= 117893 States= 5.7e+07 Transitions= 2.53e+10 Memory= 2668.135 t= 4.11e+04 R= 1e+03
-Depth= 117893 States= 5.8e+07 Transitions= 2.56e+10 Memory= 2698.213 t= 4.16e+04 R= 1e+03
-Depth= 117893 States= 5.9e+07 Transitions= 2.59e+10 Memory= 2723.897 t= 4.22e+04 R= 1e+03
-Depth= 117893 States= 6e+07 Transitions= 2.66e+10 Memory= 2747.627 t= 4.33e+04 R= 1e+03
-Depth= 117893 States= 6.1e+07 Transitions= 2.7e+10 Memory= 2774.678 t= 4.39e+04 R= 1e+03
-Depth= 117893 States= 6.2e+07 Transitions= 2.73e+10 Memory= 2803.584 t= 4.45e+04 R= 1e+03
-Depth= 117893 States= 6.3e+07 Transitions= 2.77e+10 Memory= 2831.221 t= 4.51e+04 R= 1e+03
-Depth= 117893 States= 6.4e+07 Transitions= 2.8e+10 Memory= 2860.225 t= 4.56e+04 R= 1e+03
-Depth= 117893 States= 6.5e+07 Transitions= 2.84e+10 Memory= 2885.225 t= 4.62e+04 R= 1e+03
-Depth= 117893 States= 6.6e+07 Transitions= 2.89e+10 Memory= 2908.760 t= 4.71e+04 R= 1e+03
-Depth= 117893 States= 6.7e+07 Transitions= 2.96e+10 Memory= 2932.686 t= 4.82e+04 R= 1e+03
-Depth= 117893 States= 6.8e+07 Transitions= 3.03e+10 Memory= 2956.123 t= 4.96e+04 R= 1e+03
-Depth= 117893 States= 6.9e+07 Transitions= 3.14e+10 Memory= 2985.908 t= 5.13e+04 R= 1e+03
-Depth= 117893 States= 7e+07 Transitions= 3.24e+10 Memory= 3015.303 t= 5.31e+04 R= 1e+03
-Depth= 117893 States= 7.1e+07 Transitions= 3.36e+10 Memory= 3039.912 t= 5.5e+04 R= 1e+03
-Depth= 117893 States= 7.2e+07 Transitions= 3.47e+10 Memory= 3065.401 t= 5.69e+04 R= 1e+03
-Depth= 117893 States= 7.3e+07 Transitions= 3.58e+10 Memory= 3086.690 t= 5.87e+04 R= 1e+03
-Depth= 117893 States= 7.4e+07 Transitions= 3.67e+10 Memory= 3108.272 t= 6.02e+04 R= 1e+03
-Depth= 117893 States= 7.5e+07 Transitions= 3.78e+10 Memory= 3127.608 t= 6.21e+04 R= 1e+03
-Depth= 117893 States= 7.6e+07 Transitions= 3.89e+10 Memory= 3147.627 t= 6.39e+04 R= 1e+03
-Depth= 117893 States= 7.7e+07 Transitions= 3.97e+10 Memory= 3167.647 t= 6.53e+04 R= 1e+03
-Depth= 117893 States= 7.8e+07 Transitions= 4.01e+10 Memory= 3195.772 t= 6.6e+04 R= 1e+03
-Depth= 117893 States= 7.9e+07 Transitions= 4.07e+10 Memory= 3221.065 t= 6.69e+04 R= 1e+03
-Depth= 117893 States= 8e+07 Transitions= 4.14e+10 Memory= 3245.869 t= 6.8e+04 R= 1e+03
-Depth= 117893 States= 8.1e+07 Transitions= 4.26e+10 Memory= 3270.186 t= 7e+04 R= 1e+03
-Depth= 117893 States= 8.2e+07 Transitions= 4.33e+10 Memory= 3293.135 t= 7.12e+04 R= 1e+03
-Depth= 117893 States= 8.3e+07 Transitions= 4.38e+10 Memory= 3323.701 t= 7.21e+04 R= 1e+03
-Depth= 117893 States= 8.4e+07 Transitions= 4.41e+10 Memory= 3350.752 t= 7.26e+04 R= 1e+03
-Depth= 117893 States= 8.5e+07 Transitions= 4.45e+10 Memory= 3375.166 t= 7.31e+04 R= 1e+03
-Depth= 117893 States= 8.6e+07 Transitions= 4.49e+10 Memory= 3397.432 t= 7.37e+04 R= 1e+03
-Depth= 117893 States= 8.7e+07 Transitions= 4.53e+10 Memory= 3424.287 t= 7.44e+04 R= 1e+03
-Depth= 117893 States= 8.8e+07 Transitions= 4.61e+10 Memory= 3449.385 t= 7.58e+04 R= 1e+03
-Depth= 117893 States= 8.9e+07 Transitions= 4.71e+10 Memory= 3469.795 t= 7.74e+04 R= 1e+03
-Depth= 117893 States= 9e+07 Transitions= 4.75e+10 Memory= 3498.018 t= 7.81e+04 R= 1e+03
-Depth= 117893 States= 9.1e+07 Transitions= 4.8e+10 Memory= 3524.678 t= 7.88e+04 R= 1e+03
-Depth= 117893 States= 9.2e+07 Transitions= 4.88e+10 Memory= 3549.776 t= 8.02e+04 R= 1e+03
-Depth= 117893 States= 9.3e+07 Transitions= 4.97e+10 Memory= 3573.897 t= 8.16e+04 R= 1e+03
-Depth= 117893 States= 9.4e+07 Transitions= 5.03e+10 Memory= 3598.311 t= 8.26e+04 R= 1e+03
-Depth= 117893 States= 9.5e+07 Transitions= 5.12e+10 Memory= 3621.358 t= 8.41e+04 R= 1e+03
-Depth= 117893 States= 9.6e+07 Transitions= 5.19e+10 Memory= 3645.381 t= 8.52e+04 R= 1e+03
-Depth= 117893 States= 9.7e+07 Transitions= 5.26e+10 Memory= 3669.502 t= 8.64e+04 R= 1e+03
-Depth= 117893 States= 9.8e+07 Transitions= 5.32e+10 Memory= 3693.233 t= 8.75e+04 R= 1e+03
-Depth= 117893 States= 9.9e+07 Transitions= 5.36e+10 Memory= 3723.115 t= 8.8e+04 R= 1e+03
-Depth= 117893 States= 1e+08 Transitions= 5.41e+10 Memory= 3748.799 t= 8.89e+04 R= 1e+03
-Depth= 117893 States= 1.01e+08 Transitions= 5.51e+10 Memory= 3771.943 t= 9.05e+04 R= 1e+03
-Depth= 117893 States= 1.02e+08 Transitions= 5.59e+10 Memory= 3796.651 t= 9.18e+04 R= 1e+03
-Depth= 117893 States= 1.03e+08 Transitions= 5.64e+10 Memory= 3820.967 t= 9.28e+04 R= 1e+03
-Depth= 117893 States= 1.04e+08 Transitions= 5.71e+10 Memory= 3845.283 t= 9.39e+04 R= 1e+03
-Depth= 117893 States= 1.05e+08 Transitions= 5.76e+10 Memory= 3872.041 t= 9.46e+04 R= 1e+03
-Depth= 117893 States= 1.06e+08 Transitions= 5.8e+10 Memory= 3901.436 t= 9.54e+04 R= 1e+03
-Depth= 117893 States= 1.07e+08 Transitions= 5.85e+10 Memory= 3931.026 t= 9.61e+04 R= 1e+03
-Depth= 117893 States= 1.08e+08 Transitions= 5.89e+10 Memory= 3956.318 t= 9.68e+04 R= 1e+03
-Depth= 117893 States= 1.09e+08 Transitions= 5.96e+10 Memory= 3978.486 t= 9.79e+04 R= 1e+03
-Depth= 117893 States= 1.1e+08 Transitions= 6.02e+10 Memory= 4002.901 t= 9.89e+04 R= 1e+03
-Depth= 117893 States= 1.11e+08 Transitions= 6.06e+10 Memory= 4027.803 t= 9.96e+04 R= 1e+03
-Depth= 117893 States= 1.12e+08 Transitions= 6.12e+10 Memory= 4051.924 t= 1.01e+05 R= 1e+03
-Depth= 117893 States= 1.13e+08 Transitions= 6.16e+10 Memory= 4079.365 t= 1.01e+05 R= 1e+03
-Depth= 117893 States= 1.14e+08 Transitions= 6.22e+10 Memory= 4104.756 t= 1.02e+05 R= 1e+03
-Depth= 117893 States= 1.15e+08 Transitions= 6.28e+10 Memory= 4129.268 t= 1.03e+05 R= 1e+03
-Depth= 117893 States= 1.16e+08 Transitions= 6.38e+10 Memory= 4155.537 t= 1.05e+05 R= 1e+03
-Depth= 117893 States= 1.17e+08 Transitions= 6.44e+10 Memory= 4184.443 t= 1.06e+05 R= 1e+03
-Depth= 117893 States= 1.18e+08 Transitions= 6.48e+10 Memory= 4211.397 t= 1.07e+05 R= 1e+03
-Depth= 117893 States= 1.19e+08 Transitions= 6.51e+10 Memory= 4234.248 t= 1.07e+05 R= 1e+03
-Depth= 117893 States= 1.2e+08 Transitions= 6.58e+10 Memory= 4262.471 t= 1.08e+05 R= 1e+03
-Depth= 117893 States= 1.21e+08 Transitions= 6.65e+10 Memory= 4289.912 t= 1.17e+05 R= 1e+03
-Depth= 117893 States= 1.22e+08 Transitions= 6.69e+10 Memory= 4315.791 t= 1.17e+05 R= 1e+03
-Depth= 117893 States= 1.23e+08 Transitions= 6.74e+10 Memory= 4343.330 t= 1.18e+05 R= 1e+03
-Depth= 117893 States= 1.24e+08 Transitions= 6.83e+10 Memory= 4368.623 t= 1.19e+05 R= 1e+03
-Depth= 117893 States= 1.25e+08 Transitions= 6.86e+10 Memory= 4395.674 t= 1.2e+05 R= 1e+03
-Depth= 117893 States= 1.26e+08 Transitions= 6.9e+10 Memory= 4419.990 t= 1.21e+05 R= 1e+03
-Depth= 117893 States= 1.27e+08 Transitions= 6.94e+10 Memory= 4448.115 t= 1.21e+05 R= 1e+03
-Depth= 117893 States= 1.28e+08 Transitions= 7.02e+10 Memory= 4473.994 t= 1.23e+05 R= 1e+03
-Depth= 117893 States= 1.29e+08 Transitions= 7.05e+10 Memory= 4500.947 t= 1.23e+05 R= 1e+03
-Depth= 117893 States= 1.3e+08 Transitions= 7.09e+10 Memory= 4526.826 t= 1.24e+05 R= 1e+03
-Depth= 117893 States= 1.31e+08 Transitions= 7.18e+10 Memory= 4553.291 t= 1.25e+05 R= 1e+03
-Depth= 117893 States= 1.32e+08 Transitions= 7.21e+10 Memory= 4581.221 t= 1.26e+05 R= 1e+03
-Depth= 117893 States= 1.33e+08 Transitions= 7.25e+10 Memory= 4605.830 t= 1.26e+05 R= 1e+03
-Depth= 117893 States= 1.34e+08 Transitions= 7.3e+10 Memory= 4632.197 t= 1.27e+05 R= 1e+03
-Depth= 117893 States= 1.35e+08 Transitions= 7.35e+10 Memory= 4657.588 t= 1.33e+05 R= 1e+03
-pan: resizing hashtable to -w28.. done
-Depth= 117893 States= 1.36e+08 Transitions= 7.38e+10 Memory= 6705.588 t= 1.33e+05 R= 1e+03
-Depth= 117893 States= 1.37e+08 Transitions= 7.46e+10 Memory= 6705.588 t= 1.35e+05 R= 1e+03
-Depth= 117893 States= 1.38e+08 Transitions= 7.54e+10 Memory= 6720.627 t= 1.36e+05 R= 1e+03
-Depth= 117893 States= 1.39e+08 Transitions= 7.57e+10 Memory= 6750.217 t= 1.37e+05 R= 1e+03
-Depth= 117893 States= 1.4e+08 Transitions= 7.61e+10 Memory= 6775.803 t= 1.37e+05 R= 1e+03
-Depth= 117893 States= 1.41e+08 Transitions= 7.65e+10 Memory= 6797.190 t= 1.38e+05 R= 1e+03
-Depth= 117893 States= 1.42e+08 Transitions= 7.71e+10 Memory= 6823.068 t= 1.39e+05 R= 1e+03
-Depth= 117893 States= 1.43e+08 Transitions= 7.76e+10 Memory= 6851.682 t= 1.4e+05 R= 1e+03
-Depth= 117893 States= 1.44e+08 Transitions= 7.83e+10 Memory= 6879.611 t= 1.41e+05 R= 1e+03
-Depth= 117893 States= 1.45e+08 Transitions= 7.87e+10 Memory= 6905.100 t= 1.41e+05 R= 1e+03
-Depth= 117893 States= 1.46e+08 Transitions= 7.91e+10 Memory= 6929.318 t= 1.42e+05 R= 1e+03
-Depth= 117893 States= 1.47e+08 Transitions= 7.96e+10 Memory= 6954.709 t= 1.43e+05 R= 1e+03
-Depth= 117893 States= 1.48e+08 Transitions= 8e+10 Memory= 6983.225 t= 1.44e+05 R= 1e+03
-Depth= 117893 States= 1.49e+08 Transitions= 8.05e+10 Memory= 7013.791 t= 1.44e+05 R= 1e+03
-Depth= 117893 States= 1.5e+08 Transitions= 8.15e+10 Memory= 7037.033 t= 1.46e+05 R= 1e+03
-Depth= 117893 States= 1.51e+08 Transitions= 8.19e+10 Memory= 7068.381 t= 1.47e+05 R= 1e+03
-Depth= 117893 States= 1.52e+08 Transitions= 8.22e+10 Memory= 7093.576 t= 1.47e+05 R= 1e+03
-Depth= 117893 States= 1.53e+08 Transitions= 8.26e+10 Memory= 7115.842 t= 1.48e+05 R= 1e+03
-Depth= 117893 States= 1.54e+08 Transitions= 8.3e+10 Memory= 7144.358 t= 1.48e+05 R= 1e+03
-Depth= 117893 States= 1.55e+08 Transitions= 8.39e+10 Memory= 7170.432 t= 1.5e+05 R= 1e+03
-Depth= 117893 States= 1.56e+08 Transitions= 8.42e+10 Memory= 7197.483 t= 1.5e+05 R= 1e+03
-Depth= 117893 States= 1.57e+08 Transitions= 8.46e+10 Memory= 7220.725 t= 1.51e+05 R= 1e+03
-Depth= 117893 States= 1.58e+08 Transitions= 8.51e+10 Memory= 7246.701 t= 1.52e+05 R= 1e+03
-Depth= 117893 States= 1.59e+08 Transitions= 8.55e+10 Memory= 7273.752 t= 1.52e+05 R= 1e+03
-Depth= 117893 States= 1.6e+08 Transitions= 8.58e+10 Memory= 7302.951 t= 1.53e+05 R= 1e+03
-Depth= 117893 States= 1.61e+08 Transitions= 8.64e+10 Memory= 7327.365 t= 1.54e+05 R= 1e+03
-Depth= 117893 States= 1.62e+08 Transitions= 8.69e+10 Memory= 7353.049 t= 1.55e+05 R= 1e+03
-Depth= 117893 States= 1.63e+08 Transitions= 8.73e+10 Memory= 7379.318 t= 1.55e+05 R= 1e+03
-Depth= 117893 States= 1.64e+08 Transitions= 8.77e+10 Memory= 7404.904 t= 1.56e+05 R= 1e+03
-Depth= 117893 States= 1.65e+08 Transitions= 8.82e+10 Memory= 7429.514 t= 1.57e+05 R= 1e+03
-Depth= 117893 States= 1.66e+08 Transitions= 8.87e+10 Memory= 7453.733 t= 1.58e+05 R= 1e+03
-Depth= 117893 States= 1.67e+08 Transitions= 8.95e+10 Memory= 7477.561 t= 1.59e+05 R= 1e+03
-Depth= 117893 States= 1.68e+08 Transitions= 9.02e+10 Memory= 7501.096 t= 1.6e+05 R= 1e+03
-Depth= 117893 States= 1.69e+08 Transitions= 9.07e+10 Memory= 7527.365 t= 1.61e+05 R= 1e+03
-Depth= 117893 States= 1.7e+08 Transitions= 9.11e+10 Memory= 7553.830 t= 1.61e+05 R= 1e+03
-Depth= 117893 States= 1.71e+08 Transitions= 9.16e+10 Memory= 7577.951 t= 1.62e+05 R= 1e+03
-Depth= 117893 States= 1.72e+08 Transitions= 9.24e+10 Memory= 7602.658 t= 1.63e+05 R= 1e+03
-Depth= 117893 States= 1.73e+08 Transitions= 9.35e+10 Memory= 7626.096 t= 1.65e+05 R= 1e+03
-Depth= 117893 States= 1.74e+08 Transitions= 9.39e+10 Memory= 7656.369 t= 1.66e+05 R= 1e+03
-Depth= 117893 States= 1.75e+08 Transitions= 9.43e+10 Memory= 7682.834 t= 1.67e+05 R= 1e+03
-Depth= 117893 States= 1.76e+08 Transitions= 9.49e+10 Memory= 7709.201 t= 1.67e+05 R= 1e+03
-Depth= 117893 States= 1.77e+08 Transitions= 9.55e+10 Memory= 7736.447 t= 1.68e+05 R= 1e+03
-Depth= 117893 States= 1.78e+08 Transitions= 9.61e+10 Memory= 7763.791 t= 1.69e+05 R= 1e+03
-Depth= 117893 States= 1.79e+08 Transitions= 9.66e+10 Memory= 7790.061 t= 1.7e+05 R= 1e+03
-Depth= 117893 States= 1.8e+08 Transitions= 9.72e+10 Memory= 7817.600 t= 1.71e+05 R= 1e+03
-Depth= 117893 States= 1.81e+08 Transitions= 9.8e+10 Memory= 7837.912 t= 1.73e+05 R= 1e+03
-Depth= 117893 States= 1.82e+08 Transitions= 9.88e+10 Memory= 7858.127 t= 1.74e+05 R= 1e+03
-Depth= 117893 States= 1.83e+08 Transitions= 9.95e+10 Memory= 7886.154 t= 1.75e+05 R= 1e+03
-Depth= 117893 States= 1.84e+08 Transitions= 1e+11 Memory= 7912.522 t= 1.76e+05 R= 1e+03
-Depth= 117893 States= 1.85e+08 Transitions= 1.01e+11 Memory= 7937.717 t= 1.77e+05 R= 1e+03
-Depth= 117893 States= 1.86e+08 Transitions= 1.02e+11 Memory= 7962.815 t= 1.78e+05 R= 1e+03
-Depth= 117893 States= 1.87e+08 Transitions= 1.02e+11 Memory= 7988.010 t= 1.79e+05 R= 1e+03
-Depth= 117893 States= 1.88e+08 Transitions= 1.03e+11 Memory= 8014.768 t= 1.8e+05 R= 1e+03
-Depth= 117893 States= 1.89e+08 Transitions= 1.03e+11 Memory= 8040.061 t= 1.81e+05 R= 1e+03
-Depth= 117893 States= 1.9e+08 Transitions= 1.04e+11 Memory= 8066.818 t= 1.82e+05 R= 1e+03
-Depth= 117893 States= 1.91e+08 Transitions= 1.05e+11 Memory= 8090.451 t= 1.83e+05 R= 1e+03
-Depth= 117893 States= 1.92e+08 Transitions= 1.05e+11 Memory= 8116.330 t= 1.84e+05 R= 1e+03
-Depth= 117893 States= 1.93e+08 Transitions= 1.06e+11 Memory= 8144.748 t= 1.85e+05 R= 1e+03
-Depth= 117893 States= 1.94e+08 Transitions= 1.07e+11 Memory= 8170.822 t= 1.86e+05 R= 1e+03
-Depth= 117893 States= 1.95e+08 Transitions= 1.07e+11 Memory= 8196.604 t= 1.87e+05 R= 1e+03
-Depth= 117893 States= 1.96e+08 Transitions= 1.07e+11 Memory= 8222.873 t= 1.87e+05 R= 1e+03
-Depth= 117893 States= 1.97e+08 Transitions= 1.08e+11 Memory= 8252.658 t= 1.88e+05 R= 1e+03
-Depth= 117893 States= 1.98e+08 Transitions= 1.08e+11 Memory= 8278.147 t= 1.89e+05 R= 1e+03
-Depth= 117893 States= 1.99e+08 Transitions= 1.08e+11 Memory= 8305.490 t= 1.89e+05 R= 1e+03
-Depth= 117893 States= 2e+08 Transitions= 1.09e+11 Memory= 8332.151 t= 1.9e+05 R= 1e+03
-Depth= 117893 States= 2.01e+08 Transitions= 1.09e+11 Memory= 8355.979 t= 1.91e+05 R= 1e+03
-Depth= 117893 States= 2.02e+08 Transitions= 1.1e+11 Memory= 8383.225 t= 1.91e+05 R= 1e+03
-Depth= 117893 States= 2.03e+08 Transitions= 1.1e+11 Memory= 8410.959 t= 1.92e+05 R= 1e+03
-Depth= 117893 States= 2.04e+08 Transitions= 1.11e+11 Memory= 8437.912 t= 1.93e+05 R= 1e+03
-Depth= 117893 States= 2.05e+08 Transitions= 1.11e+11 Memory= 8465.256 t= 1.94e+05 R= 1e+03
-Depth= 117893 States= 2.06e+08 Transitions= 1.12e+11 Memory= 8489.670 t= 1.94e+05 R= 1e+03
-Depth= 117893 States= 2.07e+08 Transitions= 1.12e+11 Memory= 8517.600 t= 1.95e+05 R= 1e+03
-Depth= 117893 States= 2.08e+08 Transitions= 1.12e+11 Memory= 8543.088 t= 1.96e+05 R= 1e+03
-Depth= 117893 States= 2.09e+08 Transitions= 1.13e+11 Memory= 8566.233 t= 1.97e+05 R= 1e+03
-Depth= 117893 States= 2.1e+08 Transitions= 1.14e+11 Memory= 8590.744 t= 1.98e+05 R= 1e+03
-Depth= 117893 States= 2.11e+08 Transitions= 1.14e+11 Memory= 8613.693 t= 1.99e+05 R= 1e+03
-Depth= 117893 States= 2.12e+08 Transitions= 1.15e+11 Memory= 8642.502 t= 2.01e+05 R= 1e+03
-Depth= 117893 States= 2.13e+08 Transitions= 1.16e+11 Memory= 8672.873 t= 2.02e+05 R= 1e+03
-Depth= 117893 States= 2.14e+08 Transitions= 1.18e+11 Memory= 8697.483 t= 2.04e+05 R= 1e+03
-Depth= 117893 States= 2.15e+08 Transitions= 1.19e+11 Memory= 8722.190 t= 2.06e+05 R= 1e+03
-Depth= 117893 States= 2.16e+08 Transitions= 1.2e+11 Memory= 8744.455 t= 2.08e+05 R= 1e+03
-Depth= 117893 States= 2.17e+08 Transitions= 1.21e+11 Memory= 8765.842 t= 2.09e+05 R= 1e+03
-Depth= 117893 States= 2.18e+08 Transitions= 1.22e+11 Memory= 8785.861 t= 2.11e+05 R= 1e+03
-Depth= 117893 States= 2.19e+08 Transitions= 1.23e+11 Memory= 8804.904 t= 2.13e+05 R= 1e+03
-Depth= 117893 States= 2.2e+08 Transitions= 1.24e+11 Memory= 8823.850 t= 2.15e+05 R= 1e+03
-Depth= 117893 States= 2.21e+08 Transitions= 1.24e+11 Memory= 8850.705 t= 2.15e+05 R= 1e+03
-Depth= 117893 States= 2.22e+08 Transitions= 1.25e+11 Memory= 8877.365 t= 2.16e+05 R= 1e+03
-Depth= 117893 States= 2.23e+08 Transitions= 1.25e+11 Memory= 8902.268 t= 2.17e+05 R= 1e+03
-Depth= 117893 States= 2.24e+08 Transitions= 1.26e+11 Memory= 8927.268 t= 2.19e+05 R= 1e+03
-Depth= 117893 States= 2.25e+08 Transitions= 1.27e+11 Memory= 8949.143 t= 2.2e+05 R= 1e+03
-Depth= 117893 States= 2.26e+08 Transitions= 1.28e+11 Memory= 8973.459 t= 2.22e+05 R= 1e+03
-Depth= 117893 States= 2.27e+08 Transitions= 1.29e+11 Memory= 9004.807 t= 2.22e+05 R= 1e+03
-Depth= 117893 States= 2.28e+08 Transitions= 1.29e+11 Memory= 9031.174 t= 2.23e+05 R= 1e+03
-Depth= 117893 States= 2.29e+08 Transitions= 1.29e+11 Memory= 9054.709 t= 2.23e+05 R= 1e+03
-Depth= 117893 States= 2.3e+08 Transitions= 1.3e+11 Memory= 9077.756 t= 2.24e+05 R= 1e+03
-Depth= 117893 States= 2.31e+08 Transitions= 1.3e+11 Memory= 9103.830 t= 2.25e+05 R= 1e+03
-Depth= 117893 States= 2.32e+08 Transitions= 1.31e+11 Memory= 9128.830 t= 2.26e+05 R= 1e+03
-Depth= 117893 States= 2.33e+08 Transitions= 1.32e+11 Memory= 9150.315 t= 2.28e+05 R= 1e+03
-Depth= 117893 States= 2.34e+08 Transitions= 1.32e+11 Memory= 9175.705 t= 2.29e+05 R= 1e+03
-Depth= 117893 States= 2.35e+08 Transitions= 1.33e+11 Memory= 9201.096 t= 2.3e+05 R= 1e+03
-Depth= 117893 States= 2.36e+08 Transitions= 1.34e+11 Memory= 9226.682 t= 2.31e+05 R= 1e+03
-Depth= 117893 States= 2.37e+08 Transitions= 1.34e+11 Memory= 9253.049 t= 2.31e+05 R= 1e+03
-Depth= 117893 States= 2.38e+08 Transitions= 1.35e+11 Memory= 9276.291 t= 2.33e+05 R= 1e+03
-Depth= 117893 States= 2.39e+08 Transitions= 1.36e+11 Memory= 9300.608 t= 2.34e+05 R= 1e+03
-Depth= 117893 States= 2.4e+08 Transitions= 1.37e+11 Memory= 9324.240 t= 2.35e+05 R= 1e+03
-Depth= 117893 States= 2.41e+08 Transitions= 1.37e+11 Memory= 9348.361 t= 2.37e+05 R= 1e+03
-Depth= 117893 States= 2.42e+08 Transitions= 1.38e+11 Memory= 9372.873 t= 2.38e+05 R= 1e+03
-Depth= 117893 States= 2.43e+08 Transitions= 1.39e+11 Memory= 9396.604 t= 2.39e+05 R= 1e+03
-Depth= 117893 States= 2.44e+08 Transitions= 1.39e+11 Memory= 9421.994 t= 2.4e+05 R= 1e+03
-Depth= 117893 States= 2.45e+08 Transitions= 1.4e+11 Memory= 9450.998 t= 2.41e+05 R= 1e+03
-Depth= 117893 States= 2.46e+08 Transitions= 1.41e+11 Memory= 9475.217 t= 2.42e+05 R= 1e+03
-Depth= 117893 States= 2.47e+08 Transitions= 1.41e+11 Memory= 9498.264 t= 2.43e+05 R= 1e+03
-Depth= 117893 States= 2.48e+08 Transitions= 1.42e+11 Memory= 9522.580 t= 2.44e+05 R= 1e+03
-Depth= 117893 States= 2.49e+08 Transitions= 1.42e+11 Memory= 9549.924 t= 2.45e+05 R= 1e+03
-Depth= 117893 States= 2.5e+08 Transitions= 1.43e+11 Memory= 9579.807 t= 2.45e+05 R= 1e+03
-Depth= 117893 States= 2.51e+08 Transitions= 1.43e+11 Memory= 9609.104 t= 2.46e+05 R= 1e+03
-Depth= 117893 States= 2.52e+08 Transitions= 1.44e+11 Memory= 9631.858 t= 2.47e+05 R= 1e+03
-Depth= 117893 States= 2.53e+08 Transitions= 1.45e+11 Memory= 9652.756 t= 2.48e+05 R= 1e+03
-Depth= 117893 States= 2.54e+08 Transitions= 1.45e+11 Memory= 9678.733 t= 2.49e+05 R= 1e+03
-Depth= 117893 States= 2.55e+08 Transitions= 1.45e+11 Memory= 9703.733 t= 2.5e+05 R= 1e+03
-Depth= 117893 States= 2.56e+08 Transitions= 1.46e+11 Memory= 9728.440 t= 2.5e+05 R= 1e+03
-Depth= 117893 States= 2.57e+08 Transitions= 1.46e+11 Memory= 9757.834 t= 2.51e+05 R= 1e+03
-Depth= 117893 States= 2.58e+08 Transitions= 1.47e+11 Memory= 9784.006 t= 2.52e+05 R= 1e+03
-Depth= 117893 States= 2.59e+08 Transitions= 1.48e+11 Memory= 9810.959 t= 2.54e+05 R= 1e+03
-Depth= 117893 States= 2.6e+08 Transitions= 1.48e+11 Memory= 9839.475 t= 2.54e+05 R= 1e+03
-Depth= 117893 States= 2.61e+08 Transitions= 1.49e+11 Memory= 9862.717 t= 2.55e+05 R= 1e+03
-Depth= 117893 States= 2.62e+08 Transitions= 1.49e+11 Memory= 9891.428 t= 2.56e+05 R= 1e+03
-Depth= 117893 States= 2.63e+08 Transitions= 1.5e+11 Memory= 9916.623 t= 2.57e+05 R= 1e+03
-Depth= 117893 States= 2.64e+08 Transitions= 1.5e+11 Memory= 9944.162 t= 2.58e+05 R= 1e+03
-Depth= 117893 States= 2.65e+08 Transitions= 1.51e+11 Memory= 9969.358 t= 2.58e+05 R= 1e+03
-Depth= 117893 States= 2.66e+08 Transitions= 1.52e+11 Memory= 9995.432 t= 2.6e+05 R= 1e+03
-Depth= 117893 States= 2.67e+08 Transitions= 1.52e+11 Memory= 10023.654 t= 2.6e+05 R= 1e+03
-Depth= 117893 States= 2.68e+08 Transitions= 1.52e+11 Memory= 10047.580 t= 2.61e+05 R= 1e+03
-Depth= 117893 States= 2.69e+08 Transitions= 1.53e+11 Memory= 10075.022 t= 2.62e+05 R= 1e+03
-Depth= 117893 States= 2.7e+08 Transitions= 1.54e+11 Memory= 10101.779 t= 2.63e+05 R= 1e+03
-Depth= 117893 States= 2.71e+08 Transitions= 1.54e+11 Memory= 10129.221 t= 2.64e+05 R= 1e+03
-Depth= 117893 States= 2.72e+08 Transitions= 1.54e+11 Memory= 10154.416 t= 2.64e+05 R= 1e+03
-Depth= 117893 States= 2.73e+08 Transitions= 1.55e+11 Memory= 10180.393 t= 2.66e+05 R= 1e+03
-Depth= 117893 States= 2.74e+08 Transitions= 1.56e+11 Memory= 10209.104 t= 2.66e+05 R= 1e+03
-Depth= 117893 States= 2.75e+08 Transitions= 1.56e+11 Memory= 10232.541 t= 2.67e+05 R= 1e+03
-Depth= 117893 States= 2.76e+08 Transitions= 1.57e+11 Memory= 10259.690 t= 2.68e+05 R= 1e+03
-Depth= 117893 States= 2.77e+08 Transitions= 1.57e+11 Memory= 10285.080 t= 2.68e+05 R= 1e+03
-Depth= 117893 States= 2.78e+08 Transitions= 1.57e+11 Memory= 10311.154 t= 2.69e+05 R= 1e+03
-Depth= 117893 States= 2.79e+08 Transitions= 1.58e+11 Memory= 10337.033 t= 2.71e+05 R= 1e+03
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi-compress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-depth 7: Claim reached state 9 (line 1367)
-depth 50: Claim reached state 9 (line 1366)
-Depth= 7605 States= 1e+06 Transitions= 3.21e+08 Memory= 493.010 t= 500 R= 2e+03
-Depth= 7605 States= 2e+06 Transitions= 6.35e+08 Memory= 518.401 t= 996 R= 2e+03
-Depth= 7605 States= 3e+06 Transitions= 9.46e+08 Memory= 549.455 t= 1.5e+03 R= 2e+03
-pan: resizing hashtable to -w22.. done
-Depth= 7605 States= 4e+06 Transitions= 1.25e+09 Memory= 609.776 t= 1.97e+03 R= 2e+03
-Depth= 9389 States= 5e+06 Transitions= 1.56e+09 Memory= 634.873 t= 2.46e+03 R= 2e+03
-Depth= 9389 States= 6e+06 Transitions= 1.88e+09 Memory= 662.315 t= 2.97e+03 R= 2e+03
-Depth= 9389 States= 7e+06 Transitions= 2.25e+09 Memory= 688.193 t= 3.58e+03 R= 2e+03
-Depth= 9389 States= 8e+06 Transitions= 2.61e+09 Memory= 716.611 t= 4.18e+03 R= 2e+03
-Depth= 9389 States= 9e+06 Transitions= 2.96e+09 Memory= 743.662 t= 4.75e+03 R= 2e+03
-pan: resizing hashtable to -w24.. done
-Depth= 9389 States= 1e+07 Transitions= 3.29e+09 Memory= 894.611 t= 5.26e+03 R= 2e+03
-Depth= 9389 States= 1.1e+07 Transitions= 3.62e+09 Memory= 921.076 t= 5.77e+03 R= 2e+03
-Depth= 9389 States= 1.2e+07 Transitions= 3.93e+09 Memory= 947.053 t= 6.27e+03 R= 2e+03
-Depth= 9389 States= 1.3e+07 Transitions= 4.25e+09 Memory= 974.299 t= 6.76e+03 R= 2e+03
-Depth= 9389 States= 1.4e+07 Transitions= 4.55e+09 Memory= 1004.963 t= 7.23e+03 R= 2e+03
-Depth= 9389 States= 1.5e+07 Transitions= 4.87e+09 Memory= 1029.963 t= 7.73e+03 R= 2e+03
-Depth= 9389 States= 1.6e+07 Transitions= 5.18e+09 Memory= 1058.088 t= 8.23e+03 R= 2e+03
-Depth= 9389 States= 1.7e+07 Transitions= 5.48e+09 Memory= 1087.580 t= 8.71e+03 R= 2e+03
-Depth= 9389 States= 1.8e+07 Transitions= 5.79e+09 Memory= 1113.166 t= 9.19e+03 R= 2e+03
-Depth= 9389 States= 1.9e+07 Transitions= 6.1e+09 Memory= 1139.143 t= 9.68e+03 R= 2e+03
-Depth= 9389 States= 2e+07 Transitions= 6.59e+09 Memory= 1164.436 t= 1.05e+04 R= 2e+03
-Depth= 9389 States= 2.1e+07 Transitions= 7.19e+09 Memory= 1188.557 t= 1.15e+04 R= 2e+03
-Depth= 9389 States= 2.2e+07 Transitions= 8.02e+09 Memory= 1210.236 t= 1.28e+04 R= 2e+03
-Depth= 9389 States= 2.3e+07 Transitions= 8.41e+09 Memory= 1237.385 t= 1.35e+04 R= 2e+03
-Depth= 9389 States= 2.4e+07 Transitions= 8.96e+09 Memory= 1261.604 t= 1.44e+04 R= 2e+03
-Depth= 9389 States= 2.5e+07 Transitions= 9.91e+09 Memory= 1287.287 t= 1.6e+04 R= 2e+03
-Depth= 9389 States= 2.6e+07 Transitions= 1.06e+10 Memory= 1312.971 t= 1.71e+04 R= 2e+03
-Depth= 9600 States= 2.7e+07 Transitions= 1.1e+10 Memory= 1340.510 t= 1.78e+04 R= 2e+03
-Depth= 9600 States= 2.8e+07 Transitions= 1.15e+10 Memory= 1367.756 t= 1.86e+04 R= 2e+03
-Depth= 9600 States= 2.9e+07 Transitions= 1.21e+10 Memory= 1395.100 t= 1.96e+04 R= 1e+03
-Depth= 9600 States= 3e+07 Transitions= 1.27e+10 Memory= 1422.639 t= 2.05e+04 R= 1e+03
-Depth= 9600 States= 3.1e+07 Transitions= 1.32e+10 Memory= 1448.908 t= 2.15e+04 R= 1e+03
-Depth= 9600 States= 3.2e+07 Transitions= 1.39e+10 Memory= 1474.494 t= 2.25e+04 R= 1e+03
-Depth= 9600 States= 3.3e+07 Transitions= 1.46e+10 Memory= 1494.807 t= 2.38e+04 R= 1e+03
-Depth= 9600 States= 3.4e+07 Transitions= 1.52e+10 Memory= 1519.709 t= 2.47e+04 R= 1e+03
-pan: resizing hashtable to -w26.. done
-Depth= 9600 States= 3.5e+07 Transitions= 1.58e+10 Memory= 2042.061 t= 2.57e+04 R= 1e+03
-Depth= 9600 States= 3.6e+07 Transitions= 1.63e+10 Memory= 2068.916 t= 2.66e+04 R= 1e+03
-Depth= 9600 States= 3.7e+07 Transitions= 1.7e+10 Memory= 2094.404 t= 2.75e+04 R= 1e+03
-Depth= 9600 States= 3.8e+07 Transitions= 1.76e+10 Memory= 2119.893 t= 2.86e+04 R= 1e+03
-Depth= 9600 States= 3.9e+07 Transitions= 1.82e+10 Memory= 2144.697 t= 2.96e+04 R= 1e+03
-Depth= 9600 States= 4e+07 Transitions= 1.87e+10 Memory= 2173.018 t= 3.03e+04 R= 1e+03
-Depth= 9600 States= 4.1e+07 Transitions= 1.93e+10 Memory= 2200.068 t= 3.13e+04 R= 1e+03
-Depth= 9600 States= 4.2e+07 Transitions= 1.98e+10 Memory= 2225.459 t= 3.22e+04 R= 1e+03
-Depth= 9600 States= 4.3e+07 Transitions= 2.05e+10 Memory= 2252.217 t= 3.32e+04 R= 1e+03
-Depth= 9600 States= 4.4e+07 Transitions= 2.13e+10 Memory= 2275.557 t= 3.45e+04 R= 1e+03
-Depth= 9600 States= 4.5e+07 Transitions= 2.18e+10 Memory= 2303.096 t= 3.53e+04 R= 1e+03
-Depth= 9600 States= 4.6e+07 Transitions= 2.22e+10 Memory= 2327.608 t= 3.59e+04 R= 1e+03
-Depth= 9600 States= 4.7e+07 Transitions= 2.25e+10 Memory= 2355.342 t= 3.65e+04 R= 1e+03
-Depth= 9600 States= 4.8e+07 Transitions= 2.28e+10 Memory= 2385.029 t= 3.7e+04 R= 1e+03
-Depth= 9600 States= 4.9e+07 Transitions= 2.32e+10 Memory= 2413.643 t= 3.75e+04 R= 1e+03
-Depth= 9600 States= 5e+07 Transitions= 2.35e+10 Memory= 2439.522 t= 3.81e+04 R= 1e+03
-Depth= 9600 States= 5.1e+07 Transitions= 2.42e+10 Memory= 2462.959 t= 3.91e+04 R= 1e+03
-Depth= 9600 States= 5.2e+07 Transitions= 2.46e+10 Memory= 2490.498 t= 3.97e+04 R= 1e+03
-Depth= 9600 States= 5.3e+07 Transitions= 2.49e+10 Memory= 2519.600 t= 4.03e+04 R= 1e+03
-Depth= 9600 States= 5.4e+07 Transitions= 2.53e+10 Memory= 2545.674 t= 4.09e+04 R= 1e+03
-Depth= 9600 States= 5.5e+07 Transitions= 2.56e+10 Memory= 2574.190 t= 4.13e+04 R= 1e+03
-Depth= 9600 States= 5.6e+07 Transitions= 2.6e+10 Memory= 2598.604 t= 4.2e+04 R= 1e+03
-Depth= 9600 States= 5.7e+07 Transitions= 2.66e+10 Memory= 2622.334 t= 4.3e+04 R= 1e+03
-Depth= 9600 States= 5.8e+07 Transitions= 2.73e+10 Memory= 2645.869 t= 4.41e+04 R= 1e+03
-Depth= 9600 States= 5.9e+07 Transitions= 2.81e+10 Memory= 2668.623 t= 4.54e+04 R= 1e+03
-Depth= 9600 States= 6e+07 Transitions= 2.91e+10 Memory= 2701.631 t= 4.72e+04 R= 1e+03
-Depth= 9600 States= 6.1e+07 Transitions= 3.02e+10 Memory= 2729.170 t= 4.9e+04 R= 1e+03
-Depth= 9600 States= 6.2e+07 Transitions= 3.14e+10 Memory= 2754.072 t= 5.09e+04 R= 1e+03
-Depth= 9600 States= 6.3e+07 Transitions= 3.25e+10 Memory= 2778.682 t= 5.29e+04 R= 1e+03
-Depth= 9600 States= 6.4e+07 Transitions= 3.35e+10 Memory= 2799.190 t= 5.46e+04 R= 1e+03
-Depth= 9600 States= 6.5e+07 Transitions= 3.45e+10 Memory= 2820.869 t= 5.61e+04 R= 1e+03
-Depth= 9600 States= 6.6e+07 Transitions= 3.56e+10 Memory= 2840.401 t= 5.81e+04 R= 1e+03
-Depth= 9600 States= 6.7e+07 Transitions= 3.66e+10 Memory= 2859.443 t= 5.98e+04 R= 1e+03
-Depth= 9600 States= 6.8e+07 Transitions= 3.74e+10 Memory= 2881.807 t= 6.1e+04 R= 1e+03
-Depth= 9600 States= 6.9e+07 Transitions= 3.78e+10 Memory= 2909.053 t= 6.17e+04 R= 1e+03
-Depth= 9600 States= 7e+07 Transitions= 3.84e+10 Memory= 2934.151 t= 6.27e+04 R= 1e+03
-Depth= 9600 States= 7.1e+07 Transitions= 3.94e+10 Memory= 2959.053 t= 6.43e+04 R= 1e+03
-Depth= 9600 States= 7.2e+07 Transitions= 4.05e+10 Memory= 2980.049 t= 6.62e+04 R= 1e+03
-Depth= 9600 States= 7.3e+07 Transitions= 4.11e+10 Memory= 3007.197 t= 6.72e+04 R= 1e+03
-Depth= 9600 States= 7.4e+07 Transitions= 4.14e+10 Memory= 3037.276 t= 6.78e+04 R= 1e+03
-Depth= 9600 States= 7.5e+07 Transitions= 4.18e+10 Memory= 3063.252 t= 6.83e+04 R= 1e+03
-Depth= 9600 States= 7.6e+07 Transitions= 4.21e+10 Memory= 3087.276 t= 6.89e+04 R= 1e+03
-Depth= 9600 States= 7.7e+07 Transitions= 4.26e+10 Memory= 3112.178 t= 6.95e+04 R= 1e+03
-Depth= 9600 States= 7.8e+07 Transitions= 4.3e+10 Memory= 3137.764 t= 7.03e+04 R= 1e+03
-Depth= 9600 States= 7.9e+07 Transitions= 4.4e+10 Memory= 3162.178 t= 7.2e+04 R= 1e+03
-Depth= 9600 States= 8e+07 Transitions= 4.48e+10 Memory= 3185.420 t= 7.32e+04 R= 1e+03
-Depth= 9600 States= 8.1e+07 Transitions= 4.53e+10 Memory= 3212.276 t= 7.4e+04 R= 1e+03
-Depth= 9600 States= 8.2e+07 Transitions= 4.6e+10 Memory= 3237.178 t= 7.52e+04 R= 1e+03
-Depth= 9600 States= 8.3e+07 Transitions= 4.7e+10 Memory= 3261.299 t= 7.69e+04 R= 1e+03
-Depth= 9600 States= 8.4e+07 Transitions= 4.75e+10 Memory= 3286.104 t= 7.76e+04 R= 1e+03
-Depth= 9600 States= 8.5e+07 Transitions= 4.84e+10 Memory= 3309.639 t= 7.91e+04 R= 1e+03
-Depth= 9600 States= 8.6e+07 Transitions= 4.91e+10 Memory= 3333.272 t= 8.04e+04 R= 1e+03
-Depth= 9600 States= 8.7e+07 Transitions= 4.98e+10 Memory= 3358.272 t= 8.15e+04 R= 1e+03
-Depth= 9600 States= 8.8e+07 Transitions= 5.04e+10 Memory= 3382.490 t= 8.25e+04 R= 1e+03
-Depth= 9600 States= 8.9e+07 Transitions= 5.09e+10 Memory= 3410.908 t= 8.32e+04 R= 1e+03
-Depth= 9600 States= 9e+07 Transitions= 5.14e+10 Memory= 3437.959 t= 8.41e+04 R= 1e+03
-Depth= 9600 States= 9.1e+07 Transitions= 5.23e+10 Memory= 3460.908 t= 8.56e+04 R= 1e+03
-Depth= 9600 States= 9.2e+07 Transitions= 5.32e+10 Memory= 3484.639 t= 8.71e+04 R= 1e+03
-Depth= 9600 States= 9.3e+07 Transitions= 5.37e+10 Memory= 3509.932 t= 8.79e+04 R= 1e+03
-Depth= 9600 States= 9.4e+07 Transitions= 5.44e+10 Memory= 3534.346 t= 8.91e+04 R= 1e+03
-Depth= 9600 States= 9.5e+07 Transitions= 5.49e+10 Memory= 3561.299 t= 8.98e+04 R= 1e+03
-Depth= 9600 States= 9.6e+07 Transitions= 5.53e+10 Memory= 3589.522 t= 9.06e+04 R= 1e+03
-Depth= 9600 States= 9.7e+07 Transitions= 5.58e+10 Memory= 3619.209 t= 9.14e+04 R= 1e+03
-Depth= 9600 States= 9.8e+07 Transitions= 5.62e+10 Memory= 3645.576 t= 9.2e+04 R= 1e+03
-Depth= 9600 States= 9.9e+07 Transitions= 5.68e+10 Memory= 3668.623 t= 9.31e+04 R= 1e+03
-Depth= 9600 States= 1e+08 Transitions= 5.75e+10 Memory= 3692.061 t= 9.41e+04 R= 1e+03
-Depth= 9600 States= 1.01e+08 Transitions= 5.79e+10 Memory= 3717.940 t= 9.48e+04 R= 1e+03
-Depth= 9600 States= 1.02e+08 Transitions= 5.85e+10 Memory= 3741.963 t= 9.57e+04 R= 1e+03
-Depth= 9600 States= 1.03e+08 Transitions= 5.89e+10 Memory= 3768.428 t= 9.64e+04 R= 1e+03
-Depth= 9600 States= 1.04e+08 Transitions= 5.95e+10 Memory= 3795.186 t= 9.75e+04 R= 1e+03
-Depth= 9600 States= 1.05e+08 Transitions= 6.01e+10 Memory= 3820.283 t= 9.84e+04 R= 1e+03
-Depth= 9600 States= 1.06e+08 Transitions= 6.09e+10 Memory= 3846.358 t= 9.98e+04 R= 1e+03
-Depth= 10157 States= 1.07e+08 Transitions= 6.17e+10 Memory= 3873.408 t= 1.01e+05 R= 1e+03
-Depth= 10157 States= 1.08e+08 Transitions= 6.21e+10 Memory= 3901.924 t= 1.02e+05 R= 1e+03
-Depth= 10157 States= 1.09e+08 Transitions= 6.24e+10 Memory= 3925.850 t= 1.02e+05 R= 1e+03
-Depth= 10157 States= 1.1e+08 Transitions= 6.29e+10 Memory= 3955.244 t= 1.03e+05 R= 1e+03
-Depth= 10193 States= 1.11e+08 Transitions= 6.38e+10 Memory= 3979.854 t= 1.05e+05 R= 1e+03
-Depth= 10193 States= 1.12e+08 Transitions= 6.42e+10 Memory= 4007.686 t= 1.05e+05 R= 1e+03
-Depth= 10193 States= 1.13e+08 Transitions= 6.45e+10 Memory= 4033.076 t= 1.06e+05 R= 1e+03
-Depth= 10193 States= 1.14e+08 Transitions= 6.55e+10 Memory= 4060.127 t= 1.07e+05 R= 1e+03
-Depth= 10193 States= 1.15e+08 Transitions= 6.59e+10 Memory= 4088.057 t= 1.08e+05 R= 1e+03
-Depth= 10193 States= 1.16e+08 Transitions= 6.63e+10 Memory= 4112.276 t= 1.09e+05 R= 1e+03
-Depth= 10193 States= 1.17e+08 Transitions= 6.66e+10 Memory= 4140.986 t= 1.09e+05 R= 1e+03
-Depth= 10193 States= 1.18e+08 Transitions= 6.73e+10 Memory= 4167.158 t= 1.1e+05 R= 1e+03
-Depth= 10193 States= 1.19e+08 Transitions= 6.78e+10 Memory= 4195.088 t= 1.11e+05 R= 1e+03
-Depth= 10193 States= 1.2e+08 Transitions= 6.82e+10 Memory= 4220.674 t= 1.12e+05 R= 1e+03
-Depth= 10193 States= 1.21e+08 Transitions= 6.9e+10 Memory= 4247.041 t= 1.13e+05 R= 1e+03
-Depth= 10193 States= 1.22e+08 Transitions= 6.94e+10 Memory= 4275.166 t= 1.14e+05 R= 1e+03
-Depth= 10193 States= 1.23e+08 Transitions= 6.98e+10 Memory= 4299.287 t= 1.14e+05 R= 1e+03
-Depth= 10193 States= 1.24e+08 Transitions= 7.03e+10 Memory= 4326.143 t= 1.15e+05 R= 1e+03
-Depth= 10193 States= 1.25e+08 Transitions= 7.08e+10 Memory= 4352.901 t= 1.16e+05 R= 1e+03
-Depth= 10193 States= 1.26e+08 Transitions= 7.11e+10 Memory= 4380.440 t= 1.17e+05 R= 1e+03
-Depth= 10193 States= 1.27e+08 Transitions= 7.17e+10 Memory= 4407.490 t= 1.18e+05 R= 1e+03
-Depth= 10193 States= 1.28e+08 Transitions= 7.26e+10 Memory= 4431.026 t= 1.19e+05 R= 1e+03
-Depth= 10193 States= 1.29e+08 Transitions= 7.3e+10 Memory= 4461.787 t= 1.2e+05 R= 1e+03
-Depth= 10193 States= 1.3e+08 Transitions= 7.34e+10 Memory= 4487.373 t= 1.2e+05 R= 1e+03
-Depth= 10193 States= 1.31e+08 Transitions= 7.37e+10 Memory= 4511.006 t= 1.21e+05 R= 1e+03
-Depth= 10193 States= 1.32e+08 Transitions= 7.43e+10 Memory= 4536.494 t= 1.22e+05 R= 1e+03
-Depth= 10193 States= 1.33e+08 Transitions= 7.47e+10 Memory= 4564.815 t= 1.23e+05 R= 1e+03
-Depth= 10193 States= 1.34e+08 Transitions= 7.56e+10 Memory= 4590.498 t= 1.24e+05 R= 1e+03
-Depth= 10193 States= 1.35e+08 Transitions= 7.6e+10 Memory= 4619.209 t= 1.25e+05 R= 1e+03
-pan: resizing hashtable to -w28.. done
-Depth= 10193 States= 1.36e+08 Transitions= 7.63e+10 Memory= 6667.209 t= 1.25e+05 R= 1e+03
-Depth= 10193 States= 1.37e+08 Transitions= 7.68e+10 Memory= 6667.209 t= 1.26e+05 R= 1e+03
-Depth= 10193 States= 1.38e+08 Transitions= 7.73e+10 Memory= 6680.490 t= 1.27e+05 R= 1e+03
-Depth= 10193 States= 1.39e+08 Transitions= 7.76e+10 Memory= 6710.178 t= 1.27e+05 R= 1e+03
-Depth= 10193 States= 1.4e+08 Transitions= 7.86e+10 Memory= 6736.252 t= 1.29e+05 R= 1e+03
-Depth= 10193 States= 1.41e+08 Transitions= 7.91e+10 Memory= 6765.647 t= 1.3e+05 R= 1e+03
-Depth= 10193 States= 1.42e+08 Transitions= 7.95e+10 Memory= 6792.697 t= 1.3e+05 R= 1e+03
-Depth= 10193 States= 1.43e+08 Transitions= 7.98e+10 Memory= 6816.818 t= 1.31e+05 R= 1e+03
-Depth= 10193 States= 1.44e+08 Transitions= 8.02e+10 Memory= 6842.893 t= 1.32e+05 R= 1e+03
-Depth= 10193 States= 1.45e+08 Transitions= 8.1e+10 Memory= 6870.236 t= 1.33e+05 R= 1e+03
-Depth= 10193 States= 1.46e+08 Transitions= 8.15e+10 Memory= 6898.361 t= 1.34e+05 R= 1e+03
-Depth= 10193 States= 1.47e+08 Transitions= 8.18e+10 Memory= 6922.092 t= 1.34e+05 R= 1e+03
-Depth= 10193 States= 1.48e+08 Transitions= 8.23e+10 Memory= 6948.557 t= 1.35e+05 R= 1e+03
-Depth= 10193 States= 1.49e+08 Transitions= 8.28e+10 Memory= 6974.533 t= 1.36e+05 R= 1e+03
-Depth= 10193 States= 1.5e+08 Transitions= 8.31e+10 Memory= 7004.221 t= 1.36e+05 R= 1e+03
-Depth= 10193 States= 1.51e+08 Transitions= 8.36e+10 Memory= 7029.416 t= 1.37e+05 R= 1e+03
-Depth= 10193 States= 1.52e+08 Transitions= 8.41e+10 Memory= 7055.588 t= 1.38e+05 R= 1e+03
-Depth= 10193 States= 1.53e+08 Transitions= 8.45e+10 Memory= 7081.760 t= 1.39e+05 R= 1e+03
-Depth= 10193 States= 1.54e+08 Transitions= 8.5e+10 Memory= 7107.834 t= 1.39e+05 R= 1e+03
-Depth= 10193 States= 1.55e+08 Transitions= 8.54e+10 Memory= 7134.201 t= 1.4e+05 R= 1e+03
-Depth= 10193 States= 1.56e+08 Transitions= 8.59e+10 Memory= 7158.713 t= 1.41e+05 R= 1e+03
-Depth= 10193 States= 1.57e+08 Transitions= 8.66e+10 Memory= 7181.662 t= 1.42e+05 R= 1e+03
-Depth= 10193 States= 1.58e+08 Transitions= 8.74e+10 Memory= 7204.221 t= 1.43e+05 R= 1e+03
-Depth= 10193 States= 1.59e+08 Transitions= 8.78e+10 Memory= 7230.295 t= 1.44e+05 R= 1e+03
-Depth= 10193 States= 1.6e+08 Transitions= 8.83e+10 Memory= 7256.662 t= 1.45e+05 R= 1e+03
-Depth= 10193 States= 1.61e+08 Transitions= 8.87e+10 Memory= 7283.127 t= 1.45e+05 R= 1e+03
-Depth= 10193 States= 1.62e+08 Transitions= 8.94e+10 Memory= 7306.760 t= 1.47e+05 R= 1e+03
-Depth= 10193 States= 1.63e+08 Transitions= 9.03e+10 Memory= 7331.565 t= 1.48e+05 R= 1e+03
-Depth= 10193 States= 1.64e+08 Transitions= 9.12e+10 Memory= 7356.955 t= 1.49e+05 R= 1e+03
-Depth= 10193 States= 1.65e+08 Transitions= 9.15e+10 Memory= 7384.983 t= 1.5e+05 R= 1e+03
-Depth= 10193 States= 1.66e+08 Transitions= 9.2e+10 Memory= 7412.033 t= 1.51e+05 R= 1e+03
-Depth= 10193 States= 1.67e+08 Transitions= 9.26e+10 Memory= 7439.377 t= 1.52e+05 R= 1e+03
-Depth= 10193 States= 1.68e+08 Transitions= 9.32e+10 Memory= 7465.256 t= 1.53e+05 R= 1e+03
-Depth= 10193 States= 1.69e+08 Transitions= 9.37e+10 Memory= 7493.479 t= 1.54e+05 R= 1e+03
-Depth= 10193 States= 1.7e+08 Transitions= 9.44e+10 Memory= 7520.041 t= 1.55e+05 R= 1e+03
-Depth= 10193 States= 1.71e+08 Transitions= 9.5e+10 Memory= 7544.065 t= 1.56e+05 R= 1e+03
-Depth= 10193 States= 1.72e+08 Transitions= 9.59e+10 Memory= 7564.377 t= 1.57e+05 R= 1e+03
-Depth= 10193 States= 1.73e+08 Transitions= 9.66e+10 Memory= 7588.693 t= 1.58e+05 R= 1e+03
-Depth= 10193 States= 1.74e+08 Transitions= 9.73e+10 Memory= 7614.865 t= 1.59e+05 R= 1e+03
-Depth= 10193 States= 1.75e+08 Transitions= 9.81e+10 Memory= 7640.354 t= 1.61e+05 R= 1e+03
-Depth= 10193 States= 1.76e+08 Transitions= 9.87e+10 Memory= 7665.744 t= 1.62e+05 R= 1e+03
-Depth= 10193 States= 1.77e+08 Transitions= 9.93e+10 Memory= 7691.135 t= 1.63e+05 R= 1e+03
-Depth= 10193 States= 1.78e+08 Transitions= 9.99e+10 Memory= 7718.479 t= 1.64e+05 R= 1e+03
-Depth= 10193 States= 1.79e+08 Transitions= 1.01e+11 Memory= 7743.772 t= 1.65e+05 R= 1e+03
-Depth= 10193 States= 1.8e+08 Transitions= 1.01e+11 Memory= 7769.651 t= 1.66e+05 R= 1e+03
-Depth= 10193 States= 1.81e+08 Transitions= 1.02e+11 Memory= 7795.920 t= 1.67e+05 R= 1e+03
-Depth= 10193 States= 1.82e+08 Transitions= 1.03e+11 Memory= 7819.651 t= 1.68e+05 R= 1e+03
-Depth= 10193 States= 1.83e+08 Transitions= 1.03e+11 Memory= 7846.897 t= 1.69e+05 R= 1e+03
-Depth= 10193 States= 1.84e+08 Transitions= 1.04e+11 Memory= 7874.631 t= 1.7e+05 R= 1e+03
-Depth= 10193 States= 1.85e+08 Transitions= 1.04e+11 Memory= 7900.510 t= 1.7e+05 R= 1e+03
-Depth= 10193 States= 1.86e+08 Transitions= 1.05e+11 Memory= 7925.803 t= 1.71e+05 R= 1e+03
-Depth= 10193 States= 1.87e+08 Transitions= 1.05e+11 Memory= 7955.295 t= 1.72e+05 R= 1e+03
-Depth= 10193 States= 1.88e+08 Transitions= 1.05e+11 Memory= 7983.420 t= 1.72e+05 R= 1e+03
-Depth= 10193 States= 1.89e+08 Transitions= 1.06e+11 Memory= 8010.373 t= 1.73e+05 R= 1e+03
-Depth= 10193 States= 1.9e+08 Transitions= 1.06e+11 Memory= 8037.424 t= 1.73e+05 R= 1e+03
-Depth= 10193 States= 1.91e+08 Transitions= 1.07e+11 Memory= 8061.838 t= 1.74e+05 R= 1e+03
-Depth= 10193 States= 1.92e+08 Transitions= 1.07e+11 Memory= 8087.326 t= 1.75e+05 R= 1e+03
-Depth= 10193 States= 1.93e+08 Transitions= 1.08e+11 Memory= 8115.256 t= 1.76e+05 R= 1e+03
-Depth= 10193 States= 1.94e+08 Transitions= 1.08e+11 Memory= 8142.307 t= 1.76e+05 R= 1e+03
-Depth= 10193 States= 1.95e+08 Transitions= 1.08e+11 Memory= 8168.479 t= 1.77e+05 R= 1e+03
-Depth= 10193 States= 1.96e+08 Transitions= 1.09e+11 Memory= 8194.846 t= 1.78e+05 R= 1e+03
-Depth= 10193 States= 1.97e+08 Transitions= 1.09e+11 Memory= 8221.311 t= 1.79e+05 R= 1e+03
-Depth= 10193 States= 1.98e+08 Transitions= 1.1e+11 Memory= 8249.240 t= 1.79e+05 R= 1e+03
-Depth= 10193 States= 1.99e+08 Transitions= 1.1e+11 Memory= 8273.264 t= 1.8e+05 R= 1e+03
-Depth= 10193 States= 2e+08 Transitions= 1.11e+11 Memory= 8295.920 t= 1.81e+05 R= 1e+03
-Depth= 10193 States= 2.01e+08 Transitions= 1.11e+11 Memory= 8320.529 t= 1.82e+05 R= 1e+03
-Depth= 10193 States= 2.02e+08 Transitions= 1.12e+11 Memory= 8345.236 t= 1.84e+05 R= 1e+03
-Depth= 10193 States= 2.03e+08 Transitions= 1.13e+11 Memory= 8379.026 t= 1.86e+05 R= 1e+03
-Depth= 10193 States= 2.04e+08 Transitions= 1.15e+11 Memory= 8403.635 t= 1.87e+05 R= 1e+03
-Depth= 10193 States= 2.05e+08 Transitions= 1.16e+11 Memory= 8427.951 t= 1.89e+05 R= 1e+03
-Depth= 10193 States= 2.06e+08 Transitions= 1.17e+11 Memory= 8452.463 t= 1.91e+05 R= 1e+03
-Depth= 10193 States= 2.07e+08 Transitions= 1.18e+11 Memory= 8472.483 t= 1.93e+05 R= 1e+03
-Depth= 10193 States= 2.08e+08 Transitions= 1.19e+11 Memory= 8493.283 t= 1.94e+05 R= 1e+03
-Depth= 10193 States= 2.09e+08 Transitions= 1.2e+11 Memory= 8513.205 t= 1.96e+05 R= 1e+03
-Depth= 10193 States= 2.1e+08 Transitions= 1.21e+11 Memory= 8532.053 t= 1.98e+05 R= 1e+03
-Depth= 10193 States= 2.11e+08 Transitions= 1.22e+11 Memory= 8555.588 t= 1.99e+05 R= 1e+03
-Depth= 10193 States= 2.12e+08 Transitions= 1.22e+11 Memory= 8582.932 t= 2e+05 R= 1e+03
-Depth= 10193 States= 2.13e+08 Transitions= 1.23e+11 Memory= 8607.834 t= 2.01e+05 R= 1e+03
-Depth= 10193 States= 2.14e+08 Transitions= 1.23e+11 Memory= 8633.029 t= 2.02e+05 R= 1e+03
-Depth= 10193 States= 2.15e+08 Transitions= 1.24e+11 Memory= 8656.858 t= 2.04e+05 R= 1e+03
-Depth= 10193 States= 2.16e+08 Transitions= 1.25e+11 Memory= 8679.904 t= 2.05e+05 R= 1e+03
-Depth= 10193 States= 2.17e+08 Transitions= 1.26e+11 Memory= 8707.932 t= 2.06e+05 R= 1e+03
-Depth= 10193 States= 2.18e+08 Transitions= 1.26e+11 Memory= 8736.740 t= 2.07e+05 R= 1e+03
-Depth= 10193 States= 2.19e+08 Transitions= 1.26e+11 Memory= 8762.229 t= 2.07e+05 R= 1e+03
-Depth= 10193 States= 2.2e+08 Transitions= 1.27e+11 Memory= 8785.764 t= 2.08e+05 R= 1e+03
-Depth= 10193 States= 2.21e+08 Transitions= 1.27e+11 Memory= 8812.619 t= 2.08e+05 R= 1e+03
-Depth= 10193 States= 2.22e+08 Transitions= 1.28e+11 Memory= 8837.326 t= 2.09e+05 R= 1e+03
-Depth= 10193 States= 2.23e+08 Transitions= 1.29e+11 Memory= 8859.006 t= 2.11e+05 R= 1e+03
-Depth= 10193 States= 2.24e+08 Transitions= 1.3e+11 Memory= 8884.104 t= 2.12e+05 R= 1e+03
-Depth= 10193 States= 2.25e+08 Transitions= 1.3e+11 Memory= 8909.006 t= 2.13e+05 R= 1e+03
-Depth= 10193 States= 2.26e+08 Transitions= 1.31e+11 Memory= 8934.787 t= 2.14e+05 R= 1e+03
-Depth= 10193 States= 2.27e+08 Transitions= 1.31e+11 Memory= 8961.057 t= 2.15e+05 R= 1e+03
-Depth= 10193 States= 2.28e+08 Transitions= 1.32e+11 Memory= 8985.666 t= 2.16e+05 R= 1e+03
-Depth= 10193 States= 2.29e+08 Transitions= 1.33e+11 Memory= 9010.080 t= 2.18e+05 R= 1e+03
-Depth= 10193 States= 2.3e+08 Transitions= 1.34e+11 Memory= 9034.885 t= 2.19e+05 R= 1e+03
-Depth= 10193 States= 2.31e+08 Transitions= 1.35e+11 Memory= 9058.127 t= 2.2e+05 R= 1e+03
-Depth= 10193 States= 2.32e+08 Transitions= 1.35e+11 Memory= 9081.760 t= 2.22e+05 R= 1e+03
-Depth= 10193 States= 2.33e+08 Transitions= 1.36e+11 Memory= 9106.467 t= 2.23e+05 R= 1e+03
-Depth= 10193 States= 2.34e+08 Transitions= 1.37e+11 Memory= 9130.295 t= 2.24e+05 R= 1e+03
-Depth= 10193 States= 2.35e+08 Transitions= 1.37e+11 Memory= 9159.690 t= 2.24e+05 R= 1e+03
-Depth= 10193 States= 2.36e+08 Transitions= 1.38e+11 Memory= 9185.471 t= 2.25e+05 R= 1e+03
-Depth= 10193 States= 2.37e+08 Transitions= 1.38e+11 Memory= 9207.639 t= 2.27e+05 R= 1e+03
-Depth= 10193 States= 2.38e+08 Transitions= 1.39e+11 Memory= 9232.443 t= 2.28e+05 R= 1e+03
-Depth= 10193 States= 2.39e+08 Transitions= 1.4e+11 Memory= 9258.811 t= 2.29e+05 R= 1e+03
-Depth= 10193 States= 2.4e+08 Transitions= 1.4e+11 Memory= 9287.619 t= 2.29e+05 R= 1e+03
-Depth= 10193 States= 2.41e+08 Transitions= 1.4e+11 Memory= 9317.209 t= 2.3e+05 R= 1e+03
-Depth= 10193 States= 2.42e+08 Transitions= 1.41e+11 Memory= 9343.088 t= 2.31e+05 R= 1e+03
-Depth= 10193 States= 2.43e+08 Transitions= 1.42e+11 Memory= 9365.354 t= 2.32e+05 R= 1e+03
-Depth= 10193 States= 2.44e+08 Transitions= 1.42e+11 Memory= 9389.182 t= 2.33e+05 R= 1e+03
-Depth= 10193 States= 2.45e+08 Transitions= 1.43e+11 Memory= 9415.256 t= 2.33e+05 R= 1e+03
-Depth= 10193 States= 2.46e+08 Transitions= 1.43e+11 Memory= 9438.596 t= 2.34e+05 R= 1e+03
-Depth= 10193 States= 2.47e+08 Transitions= 1.44e+11 Memory= 9466.623 t= 2.35e+05 R= 1e+03
-Depth= 10193 States= 2.48e+08 Transitions= 1.44e+11 Memory= 9495.041 t= 2.36e+05 R= 1e+03
-Depth= 10193 States= 2.49e+08 Transitions= 1.45e+11 Memory= 9519.651 t= 2.37e+05 R= 1e+03
-Depth= 10193 States= 2.5e+08 Transitions= 1.46e+11 Memory= 9549.436 t= 2.38e+05 R= 1e+03
-Depth= 10193 States= 2.51e+08 Transitions= 1.46e+11 Memory= 9575.022 t= 2.39e+05 R= 1e+03
-Depth= 10193 States= 2.52e+08 Transitions= 1.46e+11 Memory= 9598.752 t= 2.39e+05 R= 1e+03
-Depth= 10193 States= 2.53e+08 Transitions= 1.47e+11 Memory= 9626.584 t= 2.41e+05 R= 1e+03
-Depth= 10193 States= 2.54e+08 Transitions= 1.48e+11 Memory= 9655.588 t= 2.42e+05 R= 1e+03
-Depth= 10193 States= 2.55e+08 Transitions= 1.48e+11 Memory= 9679.904 t= 2.42e+05 R= 1e+03
-Depth= 10193 States= 2.56e+08 Transitions= 1.49e+11 Memory= 9707.834 t= 2.43e+05 R= 1e+03
-Depth= 10193 States= 2.57e+08 Transitions= 1.49e+11 Memory= 9735.568 t= 2.45e+05 R= 1e+03
-Depth= 10193 States= 2.58e+08 Transitions= 1.5e+11 Memory= 9760.861 t= 2.45e+05 R= 1e+03
-Depth= 10193 States= 2.59e+08 Transitions= 1.5e+11 Memory= 9785.959 t= 2.46e+05 R= 1e+03
-Depth= 10193 States= 2.6e+08 Transitions= 1.5e+11 Memory= 9814.182 t= 2.46e+05 R= 1e+03
-Depth= 10193 States= 2.61e+08 Transitions= 1.51e+11 Memory= 9841.428 t= 2.48e+05 R= 1e+03
-Depth= 10193 States= 2.62e+08 Transitions= 1.52e+11 Memory= 9867.014 t= 2.48e+05 R= 1e+03
-Depth= 10193 States= 2.63e+08 Transitions= 1.52e+11 Memory= 9894.846 t= 2.49e+05 R= 1e+03
-Depth= 10193 States= 2.64e+08 Transitions= 1.53e+11 Memory= 9921.604 t= 2.5e+05 R= 1e+03
-Depth= 10193 States= 2.65e+08 Transitions= 1.53e+11 Memory= 9947.287 t= 2.51e+05 R= 1e+03
-Depth= 10193 States= 2.66e+08 Transitions= 1.54e+11 Memory= 9973.361 t= 2.51e+05 R= 1e+03
-Depth= 10193 States= 2.67e+08 Transitions= 1.54e+11 Memory= 9999.240 t= 2.52e+05 R= 1e+03
-Depth= 10193 States= 2.68e+08 Transitions= 1.55e+11 Memory= 10026.584 t= 2.53e+05 R= 1e+03
-Depth= 10193 States= 2.69e+08 Transitions= 1.55e+11 Memory= 10054.416 t= 2.54e+05 R= 1e+03
-Depth= 10193 States= 2.7e+08 Transitions= 1.56e+11 Memory= 10077.658 t= 2.56e+05 R= 1e+03
-Depth= 10193 States= 2.71e+08 Transitions= 1.56e+11 Memory= 10108.615 t= 2.56e+05 R= 1e+03
-Depth= 10193 States= 2.72e+08 Transitions= 1.57e+11 Memory= 10134.494 t= 2.57e+05 R= 1e+03
-Depth= 10193 States= 2.73e+08 Transitions= 1.57e+11 Memory= 10157.639 t= 2.57e+05 R= 1e+03
-Depth= 10193 States= 2.74e+08 Transitions= 1.58e+11 Memory= 10183.127 t= 2.58e+05 R= 1e+03
-Depth= 10193 States= 2.75e+08 Transitions= 1.58e+11 Memory= 10212.522 t= 2.59e+05 R= 1e+03
-Depth= 10193 States= 2.76e+08 Transitions= 1.59e+11 Memory= 10238.596 t= 2.6e+05 R= 1e+03
-Depth= 10193 States= 2.77e+08 Transitions= 1.59e+11 Memory= 10265.647 t= 2.61e+05 R= 1e+03
-Depth= 10193 States= 2.78e+08 Transitions= 1.6e+11 Memory= 10289.963 t= 2.62e+05 R= 1e+03
-Depth= 10193 States= 2.79e+08 Transitions= 1.6e+11 Memory= 10316.233 t= 2.62e+05 R= 1e+03
-Depth= 10193 States= 2.8e+08 Transitions= 1.61e+11 Memory= 10344.651 t= 2.63e+05 R= 1e+03
-Depth= 10193 States= 2.81e+08 Transitions= 1.61e+11 Memory= 10375.315 t= 2.64e+05 R= 1e+03
-Depth= 10193 States= 2.82e+08 Transitions= 1.62e+11 Memory= 10398.654 t= 2.65e+05 R= 1e+03
-Depth= 10193 States= 2.83e+08 Transitions= 1.62e+11 Memory= 10429.611 t= 2.66e+05 R= 1e+03
-Depth= 10193 States= 2.84e+08 Transitions= 1.63e+11 Memory= 10455.588 t= 2.67e+05 R= 1e+03
-Depth= 10193 States= 2.85e+08 Transitions= 1.63e+11 Memory= 10478.830 t= 2.67e+05 R= 1e+03
-Depth= 10193 States= 2.86e+08 Transitions= 1.64e+11 Memory= 10506.760 t= 2.68e+05 R= 1e+03
-Depth= 10193 States= 2.87e+08 Transitions= 1.64e+11 Memory= 10532.443 t= 2.69e+05 R= 1e+03
-Depth= 10193 States= 2.88e+08 Transitions= 1.65e+11 Memory= 10561.252 t= 2.7e+05 R= 1e+03
-Depth= 10193 States= 2.89e+08 Transitions= 1.65e+11 Memory= 10584.983 t= 2.71e+05 R= 1e+03
-Depth= 10193 States= 2.9e+08 Transitions= 1.66e+11 Memory= 10611.252 t= 2.71e+05 R= 1e+03
-Depth= 10193 States= 2.91e+08 Transitions= 1.66e+11 Memory= 10637.033 t= 2.72e+05 R= 1e+03
-Depth= 10193 States= 2.92e+08 Transitions= 1.66e+11 Memory= 10668.674 t= 2.73e+05 R= 1e+03
-Depth= 10193 States= 2.93e+08 Transitions= 1.67e+11 Memory= 10692.111 t= 2.73e+05 R= 1e+03
-Depth= 10193 States= 2.94e+08 Transitions= 1.67e+11 Memory= 10718.283 t= 2.74e+05 R= 1e+03
-Depth= 10193 States= 2.95e+08 Transitions= 1.68e+11 Memory= 10744.748 t= 2.75e+05 R= 1e+03
-Depth= 10193 States= 2.96e+08 Transitions= 1.68e+11 Memory= 10770.920 t= 2.76e+05 R= 1e+03
-Depth= 10193 States= 2.97e+08 Transitions= 1.69e+11 Memory= 10795.139 t= 2.76e+05 R= 1e+03
-Depth= 10193 States= 2.98e+08 Transitions= 1.69e+11 Memory= 10819.358 t= 2.77e+05 R= 1e+03
-Depth= 10193 States= 2.99e+08 Transitions= 1.7e+11 Memory= 10841.721 t= 2.79e+05 R= 1e+03
-Depth= 10193 States= 3e+08 Transitions= 1.71e+11 Memory= 10867.209 t= 2.79e+05 R= 1e+03
-Depth= 10193 States= 3.01e+08 Transitions= 1.71e+11 Memory= 10893.283 t= 2.8e+05 R= 1e+03
-Depth= 10193 States= 3.02e+08 Transitions= 1.72e+11 Memory= 10916.233 t= 2.81e+05 R= 1e+03
-Depth= 10193 States= 3.03e+08 Transitions= 1.73e+11 Memory= 10940.549 t= 2.83e+05 R= 1e+03
-Depth= 10193 States= 3.04e+08 Transitions= 1.73e+11 Memory= 10971.408 t= 2.84e+05 R= 1e+03
-Depth= 10193 States= 3.05e+08 Transitions= 1.74e+11 Memory= 10996.897 t= 2.84e+05 R= 1e+03
-Depth= 10193 States= 3.06e+08 Transitions= 1.74e+11 Memory= 11023.850 t= 2.85e+05 R= 1e+03
-Depth= 10193 States= 3.07e+08 Transitions= 1.75e+11 Memory= 11049.436 t= 2.86e+05 R= 1e+03
-Depth= 10193 States= 3.08e+08 Transitions= 1.75e+11 Memory= 11077.854 t= 2.87e+05 R= 1e+03
-Depth= 10193 States= 3.09e+08 Transitions= 1.76e+11 Memory= 11104.514 t= 2.88e+05 R= 1e+03
-Depth= 10193 States= 3.1e+08 Transitions= 1.77e+11 Memory= 11125.119 t= 2.89e+05 R= 1e+03
-Depth= 10193 States= 3.11e+08 Transitions= 1.77e+11 Memory= 11146.897 t= 2.91e+05 R= 1e+03
-Depth= 10193 States= 3.12e+08 Transitions= 1.78e+11 Memory= 11173.264 t= 2.92e+05 R= 1e+03
-Depth= 10193 States= 3.13e+08 Transitions= 1.79e+11 Memory= 11198.654 t= 2.93e+05 R= 1e+03
-Depth= 10193 States= 3.14e+08 Transitions= 1.8e+11 Memory= 11224.045 t= 2.94e+05 R= 1e+03
-Depth= 10193 States= 3.15e+08 Transitions= 1.8e+11 Memory= 11248.850 t= 2.95e+05 R= 1e+03
-Depth= 10193 States= 3.16e+08 Transitions= 1.81e+11 Memory= 11274.729 t= 2.96e+05 R= 1e+03
-Depth= 10193 States= 3.17e+08 Transitions= 1.82e+11 Memory= 11300.315 t= 2.97e+05 R= 1e+03
-Depth= 10193 States= 3.18e+08 Transitions= 1.82e+11 Memory= 11326.193 t= 2.98e+05 R= 1e+03
-Depth= 10193 States= 3.19e+08 Transitions= 1.83e+11 Memory= 11351.584 t= 2.99e+05 R= 1e+03
-Depth= 10193 States= 3.2e+08 Transitions= 1.83e+11 Memory= 11377.561 t= 3e+05 R= 1e+03
-Depth= 10193 States= 3.21e+08 Transitions= 1.84e+11 Memory= 11400.510 t= 3.01e+05 R= 1e+03
-Depth= 10193 States= 3.22e+08 Transitions= 1.85e+11 Memory= 11425.803 t= 3.02e+05 R= 1e+03
-Depth= 10193 States= 3.23e+08 Transitions= 1.85e+11 Memory= 11453.928 t= 3.03e+05 R= 1e+03
-Depth= 10193 States= 3.24e+08 Transitions= 1.86e+11 Memory= 11478.635 t= 3.04e+05 R= 1e+03
-Depth= 10193 States= 3.25e+08 Transitions= 1.87e+11 Memory= 11503.830 t= 3.05e+05 R= 1e+03
-Depth= 10193 States= 3.26e+08 Transitions= 1.87e+11 Memory= 11528.830 t= 3.06e+05 R= 1e+03
-Depth= 10193 States= 3.27e+08 Transitions= 1.88e+11 Memory= 11554.416 t= 3.07e+05 R= 1e+03
-Depth= 10193 States= 3.28e+08 Transitions= 1.89e+11 Memory= 11580.686 t= 3.08e+05 R= 1e+03
-Depth= 10193 States= 3.29e+08 Transitions= 1.89e+11 Memory= 11606.467 t= 3.09e+05 R= 1e+03
-Depth= 10193 States= 3.3e+08 Transitions= 1.9e+11 Memory= 11632.346 t= 3.1e+05 R= 1e+03
-Depth= 10193 States= 3.31e+08 Transitions= 1.9e+11 Memory= 11658.420 t= 3.11e+05 R= 1e+03
-Depth= 10193 States= 3.32e+08 Transitions= 1.91e+11 Memory= 11681.662 t= 3.13e+05 R= 1e+03
-Depth= 10193 States= 3.33e+08 Transitions= 1.92e+11 Memory= 11708.713 t= 3.13e+05 R= 1e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 10193, errors: 0
-1.8778602e+08 states, stored (3.33973e+08 visited)
-1.9159243e+11 states, matched
-1.919264e+11 transitions (= visited+matched)
-1.0808296e+12 atomic steps
-hash conflicts: 3.7119584e+10 (resolved)
-
-Stats on memory usage (in Megabytes):
-20774.057 equivalent memory usage for states (stored*(State-vector + overhead))
- 9228.353 actual memory usage for states (compression: 44.42%)
- state-vector as stored = 16 byte + 36 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.576 memory lost to fragmentation
-11732.541 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 618104 5194 3828 2 2 ]
-unreached in proctype urcu_reader
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 407, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 223, "(1)"
- line 434, "pan.___", state 253, "(1)"
- line 438, "pan.___", state 266, "(1)"
- line 687, "pan.___", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 326, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 340, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 359, "(1)"
- line 434, "pan.___", state 389, "(1)"
- line 438, "pan.___", state 402, "(1)"
- line 407, "pan.___", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 455, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 469, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 488, "(1)"
- line 434, "pan.___", state 518, "(1)"
- line 438, "pan.___", state 531, "(1)"
- line 407, "pan.___", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 556, "(1)"
- line 407, "pan.___", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 557, "else"
- line 407, "pan.___", state 560, "(1)"
- line 411, "pan.___", state 568, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 570, "(1)"
- line 411, "pan.___", state 571, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 571, "else"
- line 411, "pan.___", state 574, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 409, "pan.___", state 580, "((i<1))"
- line 409, "pan.___", state 580, "((i>=1))"
- line 416, "pan.___", state 586, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 588, "(1)"
- line 416, "pan.___", state 589, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 589, "else"
- line 416, "pan.___", state 592, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 420, "pan.___", state 600, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 602, "(1)"
- line 420, "pan.___", state 603, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 603, "else"
- line 420, "pan.___", state 606, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 418, "pan.___", state 612, "((i<2))"
- line 418, "pan.___", state 612, "((i>=2))"
- line 425, "pan.___", state 619, "(1)"
- line 425, "pan.___", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 620, "else"
- line 425, "pan.___", state 623, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 429, "pan.___", state 632, "(1)"
- line 429, "pan.___", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 633, "else"
- line 429, "pan.___", state 636, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 427, "pan.___", state 642, "((i<1))"
- line 427, "pan.___", state 642, "((i>=1))"
- line 434, "pan.___", state 649, "(1)"
- line 434, "pan.___", state 650, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 650, "else"
- line 434, "pan.___", state 653, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 438, "pan.___", state 662, "(1)"
- line 438, "pan.___", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 663, "else"
- line 438, "pan.___", state 666, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 436, "pan.___", state 672, "((i<2))"
- line 436, "pan.___", state 672, "((i>=2))"
- line 446, "pan.___", state 676, "(1)"
- line 446, "pan.___", state 676, "(1)"
- line 687, "pan.___", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 687, "pan.___", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 687, "pan.___", state 681, "(1)"
- line 407, "pan.___", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 720, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 734, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 753, "(1)"
- line 434, "pan.___", state 783, "(1)"
- line 438, "pan.___", state 796, "(1)"
- line 407, "pan.___", state 824, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 856, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 870, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 889, "(1)"
- line 434, "pan.___", state 919, "(1)"
- line 438, "pan.___", state 932, "(1)"
- line 407, "pan.___", state 953, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 955, "(1)"
- line 407, "pan.___", state 956, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 956, "else"
- line 407, "pan.___", state 959, "(1)"
- line 411, "pan.___", state 967, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 969, "(1)"
- line 411, "pan.___", state 970, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 970, "else"
- line 411, "pan.___", state 973, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 409, "pan.___", state 979, "((i<1))"
- line 409, "pan.___", state 979, "((i>=1))"
- line 416, "pan.___", state 985, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 987, "(1)"
- line 416, "pan.___", state 988, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 988, "else"
- line 416, "pan.___", state 991, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 420, "pan.___", state 999, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 1001, "(1)"
- line 420, "pan.___", state 1002, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 1002, "else"
- line 420, "pan.___", state 1005, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 418, "pan.___", state 1011, "((i<2))"
- line 418, "pan.___", state 1011, "((i>=2))"
- line 425, "pan.___", state 1018, "(1)"
- line 425, "pan.___", state 1019, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 1019, "else"
- line 425, "pan.___", state 1022, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 429, "pan.___", state 1031, "(1)"
- line 429, "pan.___", state 1032, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 1032, "else"
- line 429, "pan.___", state 1035, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 427, "pan.___", state 1041, "((i<1))"
- line 427, "pan.___", state 1041, "((i>=1))"
- line 434, "pan.___", state 1048, "(1)"
- line 434, "pan.___", state 1049, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 1049, "else"
- line 434, "pan.___", state 1052, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 438, "pan.___", state 1061, "(1)"
- line 438, "pan.___", state 1062, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 1062, "else"
- line 438, "pan.___", state 1065, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 436, "pan.___", state 1071, "((i<2))"
- line 436, "pan.___", state 1071, "((i>=2))"
- line 446, "pan.___", state 1075, "(1)"
- line 446, "pan.___", state 1075, "(1)"
- line 695, "pan.___", state 1079, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 1084, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1116, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1130, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1149, "(1)"
- line 434, "pan.___", state 1179, "(1)"
- line 438, "pan.___", state 1192, "(1)"
- line 407, "pan.___", state 1216, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1248, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1262, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1281, "(1)"
- line 434, "pan.___", state 1311, "(1)"
- line 438, "pan.___", state 1324, "(1)"
- line 407, "pan.___", state 1349, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1381, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1395, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1414, "(1)"
- line 434, "pan.___", state 1444, "(1)"
- line 438, "pan.___", state 1457, "(1)"
- line 407, "pan.___", state 1478, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1510, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1524, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1543, "(1)"
- line 434, "pan.___", state 1573, "(1)"
- line 438, "pan.___", state 1586, "(1)"
- line 407, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1644, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1658, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1677, "(1)"
- line 434, "pan.___", state 1707, "(1)"
- line 438, "pan.___", state 1720, "(1)"
- line 407, "pan.___", state 1741, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1773, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1787, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1806, "(1)"
- line 434, "pan.___", state 1836, "(1)"
- line 438, "pan.___", state 1849, "(1)"
- line 407, "pan.___", state 1873, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1905, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1919, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1938, "(1)"
- line 434, "pan.___", state 1968, "(1)"
- line 438, "pan.___", state 1981, "(1)"
- line 734, "pan.___", state 2002, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 2009, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2041, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2055, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2074, "(1)"
- line 434, "pan.___", state 2104, "(1)"
- line 438, "pan.___", state 2117, "(1)"
- line 407, "pan.___", state 2138, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2170, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2184, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2203, "(1)"
- line 434, "pan.___", state 2233, "(1)"
- line 438, "pan.___", state 2246, "(1)"
- line 407, "pan.___", state 2269, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 2271, "(1)"
- line 407, "pan.___", state 2272, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 2272, "else"
- line 407, "pan.___", state 2275, "(1)"
- line 411, "pan.___", state 2283, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2286, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 2286, "else"
- line 411, "pan.___", state 2289, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 409, "pan.___", state 2295, "((i<1))"
- line 409, "pan.___", state 2295, "((i>=1))"
- line 416, "pan.___", state 2301, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2303, "(1)"
- line 416, "pan.___", state 2304, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2304, "else"
- line 416, "pan.___", state 2307, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 420, "pan.___", state 2315, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2317, "(1)"
- line 420, "pan.___", state 2318, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2318, "else"
- line 420, "pan.___", state 2321, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 418, "pan.___", state 2327, "((i<2))"
- line 418, "pan.___", state 2327, "((i>=2))"
- line 425, "pan.___", state 2334, "(1)"
- line 425, "pan.___", state 2335, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 2335, "else"
- line 425, "pan.___", state 2338, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 429, "pan.___", state 2347, "(1)"
- line 429, "pan.___", state 2348, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 2348, "else"
- line 429, "pan.___", state 2351, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 427, "pan.___", state 2357, "((i<1))"
- line 427, "pan.___", state 2357, "((i>=1))"
- line 434, "pan.___", state 2364, "(1)"
- line 434, "pan.___", state 2365, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 2365, "else"
- line 434, "pan.___", state 2368, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 438, "pan.___", state 2377, "(1)"
- line 438, "pan.___", state 2378, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 2378, "else"
- line 438, "pan.___", state 2381, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 436, "pan.___", state 2387, "((i<2))"
- line 436, "pan.___", state 2387, "((i>=2))"
- line 446, "pan.___", state 2391, "(1)"
- line 446, "pan.___", state 2391, "(1)"
- line 734, "pan.___", state 2394, "cached_urcu_active_readers = (tmp+1)"
- line 734, "pan.___", state 2395, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 734, "pan.___", state 2396, "(1)"
- line 407, "pan.___", state 2403, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2435, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2449, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2468, "(1)"
- line 434, "pan.___", state 2498, "(1)"
- line 438, "pan.___", state 2511, "(1)"
- line 407, "pan.___", state 2538, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2570, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2584, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2603, "(1)"
- line 434, "pan.___", state 2633, "(1)"
- line 438, "pan.___", state 2646, "(1)"
- line 407, "pan.___", state 2667, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2699, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2713, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2732, "(1)"
- line 434, "pan.___", state 2762, "(1)"
- line 438, "pan.___", state 2775, "(1)"
- line 245, "pan.___", state 2808, "(1)"
- line 253, "pan.___", state 2828, "(1)"
- line 257, "pan.___", state 2836, "(1)"
- line 245, "pan.___", state 2851, "(1)"
- line 253, "pan.___", state 2871, "(1)"
- line 257, "pan.___", state 2879, "(1)"
- line 929, "pan.___", state 2896, "-end-"
- (245 of 2896 states)
-unreached in proctype urcu_writer
- line 407, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 425, "pan.___", state 110, "(1)"
- line 429, "pan.___", state 123, "(1)"
- line 434, "pan.___", state 140, "(1)"
- line 268, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 407, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 303, "(1)"
- line 429, "pan.___", state 316, "(1)"
- line 434, "pan.___", state 333, "(1)"
- line 438, "pan.___", state 346, "(1)"
- line 411, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 447, "(1)"
- line 434, "pan.___", state 464, "(1)"
- line 438, "pan.___", state 477, "(1)"
- line 411, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 586, "(1)"
- line 434, "pan.___", state 603, "(1)"
- line 438, "pan.___", state 616, "(1)"
- line 411, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 715, "(1)"
- line 434, "pan.___", state 732, "(1)"
- line 438, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 846, "(1)"
- line 434, "pan.___", state 863, "(1)"
- line 438, "pan.___", state 876, "(1)"
- line 268, "pan.___", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 940, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 955, "(1)"
- line 280, "pan.___", state 962, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 978, "(1)"
- line 249, "pan.___", state 986, "(1)"
- line 253, "pan.___", state 998, "(1)"
- line 257, "pan.___", state 1006, "(1)"
- line 268, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1059, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1084, "(1)"
- line 249, "pan.___", state 1092, "(1)"
- line 253, "pan.___", state 1104, "(1)"
- line 257, "pan.___", state 1112, "(1)"
- line 272, "pan.___", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1151, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1176, "(1)"
- line 249, "pan.___", state 1184, "(1)"
- line 253, "pan.___", state 1196, "(1)"
- line 257, "pan.___", state 1204, "(1)"
- line 268, "pan.___", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1257, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1282, "(1)"
- line 249, "pan.___", state 1290, "(1)"
- line 253, "pan.___", state 1302, "(1)"
- line 257, "pan.___", state 1310, "(1)"
- line 272, "pan.___", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1349, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1374, "(1)"
- line 249, "pan.___", state 1382, "(1)"
- line 253, "pan.___", state 1394, "(1)"
- line 257, "pan.___", state 1402, "(1)"
- line 268, "pan.___", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1455, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1480, "(1)"
- line 249, "pan.___", state 1488, "(1)"
- line 253, "pan.___", state 1500, "(1)"
- line 257, "pan.___", state 1508, "(1)"
- line 272, "pan.___", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1547, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1572, "(1)"
- line 249, "pan.___", state 1580, "(1)"
- line 253, "pan.___", state 1592, "(1)"
- line 257, "pan.___", state 1600, "(1)"
- line 268, "pan.___", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1653, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1678, "(1)"
- line 249, "pan.___", state 1686, "(1)"
- line 253, "pan.___", state 1698, "(1)"
- line 257, "pan.___", state 1706, "(1)"
- line 1304, "pan.___", state 1722, "-end-"
- (103 of 1722 states)
-unreached in proctype :init:
- (0 of 28 states)
-unreached in proctype :never:
- line 1369, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.14e+05 seconds
-pan: rate 1063.7031 states/second
-pan: avg transition delay 1.6359e-06 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi-compress'
+++ /dev/null
-#define WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64 -DCOLLAPSE
-#CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 3250 States= 1e+06 Transitions= 2.74e+08 Memory= 500.529 t= 357 R= 3e+03
-Depth= 3250 States= 2e+06 Transitions= 5.69e+08 Memory= 537.248 t= 774 R= 3e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 72 byte, depth reached 3250, errors: 0
- 2668047 states, stored
-7.3166567e+08 states, matched
-7.3433372e+08 transitions (= stored+matched)
-4.2954757e+09 atomic steps
-hash conflicts: 4.8630608e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 254.445 equivalent memory usage for states (stored*(State-vector + overhead))
- 94.790 actual memory usage for states (compression: 37.25%)
- state-vector as stored = 9 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 560.490 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 25912 2128 1970 2 ]
-unreached in proctype urcu_reader
- line 267, ".input.spin", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 275, ".input.spin", state 77, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 86, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 102, "(1)"
- line 248, ".input.spin", state 110, "(1)"
- line 252, ".input.spin", state 122, "(1)"
- line 256, ".input.spin", state 130, "(1)"
- line 403, ".input.spin", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 412, ".input.spin", state 188, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 202, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 221, "(1)"
- line 430, ".input.spin", state 251, "(1)"
- line 434, ".input.spin", state 264, "(1)"
- line 613, ".input.spin", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 403, ".input.spin", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 412, ".input.spin", state 324, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 338, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 357, "(1)"
- line 430, ".input.spin", state 387, "(1)"
- line 434, ".input.spin", state 400, "(1)"
- line 403, ".input.spin", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 412, ".input.spin", state 453, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 467, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 486, "(1)"
- line 430, ".input.spin", state 516, "(1)"
- line 434, ".input.spin", state 529, "(1)"
- line 403, ".input.spin", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 403, ".input.spin", state 554, "(1)"
- line 403, ".input.spin", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 403, ".input.spin", state 555, "else"
- line 403, ".input.spin", state 558, "(1)"
- line 407, ".input.spin", state 566, "cache_dirty_urcu_active_readers = 0"
- line 407, ".input.spin", state 568, "(1)"
- line 407, ".input.spin", state 569, "(cache_dirty_urcu_active_readers)"
- line 407, ".input.spin", state 569, "else"
- line 407, ".input.spin", state 572, "(1)"
- line 407, ".input.spin", state 573, "(1)"
- line 407, ".input.spin", state 573, "(1)"
- line 405, ".input.spin", state 578, "((i<1))"
- line 405, ".input.spin", state 578, "((i>=1))"
- line 412, ".input.spin", state 584, "cache_dirty_rcu_ptr = 0"
- line 412, ".input.spin", state 586, "(1)"
- line 412, ".input.spin", state 587, "(cache_dirty_rcu_ptr)"
- line 412, ".input.spin", state 587, "else"
- line 412, ".input.spin", state 590, "(1)"
- line 412, ".input.spin", state 591, "(1)"
- line 412, ".input.spin", state 591, "(1)"
- line 416, ".input.spin", state 598, "cache_dirty_rcu_data[i] = 0"
- line 416, ".input.spin", state 600, "(1)"
- line 416, ".input.spin", state 601, "(cache_dirty_rcu_data[i])"
- line 416, ".input.spin", state 601, "else"
- line 416, ".input.spin", state 604, "(1)"
- line 416, ".input.spin", state 605, "(1)"
- line 416, ".input.spin", state 605, "(1)"
- line 414, ".input.spin", state 610, "((i<2))"
- line 414, ".input.spin", state 610, "((i>=2))"
- line 421, ".input.spin", state 617, "(1)"
- line 421, ".input.spin", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 421, ".input.spin", state 618, "else"
- line 421, ".input.spin", state 621, "(1)"
- line 421, ".input.spin", state 622, "(1)"
- line 421, ".input.spin", state 622, "(1)"
- line 425, ".input.spin", state 630, "(1)"
- line 425, ".input.spin", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 425, ".input.spin", state 631, "else"
- line 425, ".input.spin", state 634, "(1)"
- line 425, ".input.spin", state 635, "(1)"
- line 425, ".input.spin", state 635, "(1)"
- line 423, ".input.spin", state 640, "((i<1))"
- line 423, ".input.spin", state 640, "((i>=1))"
- line 430, ".input.spin", state 647, "(1)"
- line 430, ".input.spin", state 648, "(!(cache_dirty_rcu_ptr))"
- line 430, ".input.spin", state 648, "else"
- line 430, ".input.spin", state 651, "(1)"
- line 430, ".input.spin", state 652, "(1)"
- line 430, ".input.spin", state 652, "(1)"
- line 434, ".input.spin", state 660, "(1)"
- line 434, ".input.spin", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 434, ".input.spin", state 661, "else"
- line 434, ".input.spin", state 664, "(1)"
- line 434, ".input.spin", state 665, "(1)"
- line 434, ".input.spin", state 665, "(1)"
- line 432, ".input.spin", state 670, "((i<2))"
- line 432, ".input.spin", state 670, "((i>=2))"
- line 442, ".input.spin", state 674, "(1)"
- line 442, ".input.spin", state 674, "(1)"
- line 613, ".input.spin", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 613, ".input.spin", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 613, ".input.spin", state 679, "(1)"
- line 403, ".input.spin", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 412, ".input.spin", state 718, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 732, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 751, "(1)"
- line 430, ".input.spin", state 781, "(1)"
- line 434, ".input.spin", state 794, "(1)"
- line 403, ".input.spin", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 412, ".input.spin", state 853, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 867, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 886, "(1)"
- line 430, ".input.spin", state 916, "(1)"
- line 434, ".input.spin", state 929, "(1)"
- line 403, ".input.spin", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 412, ".input.spin", state 982, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 996, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 1015, "(1)"
- line 430, ".input.spin", state 1045, "(1)"
- line 434, ".input.spin", state 1058, "(1)"
- line 244, ".input.spin", state 1091, "(1)"
- line 252, ".input.spin", state 1111, "(1)"
- line 256, ".input.spin", state 1119, "(1)"
- line 747, ".input.spin", state 1136, "-end-"
- (91 of 1136 states)
-unreached in proctype urcu_writer
- line 403, ".input.spin", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 407, ".input.spin", state 59, "cache_dirty_urcu_active_readers = 0"
- line 412, ".input.spin", state 77, "cache_dirty_rcu_ptr = 0"
- line 421, ".input.spin", state 110, "(1)"
- line 425, ".input.spin", state 123, "(1)"
- line 430, ".input.spin", state 140, "(1)"
- line 267, ".input.spin", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 185, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 198, "cache_dirty_rcu_ptr = 0"
- line 403, ".input.spin", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 407, ".input.spin", state 252, "cache_dirty_urcu_active_readers = 0"
- line 412, ".input.spin", state 270, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 284, "cache_dirty_rcu_data[i] = 0"
- line 421, ".input.spin", state 303, "(1)"
- line 425, ".input.spin", state 316, "(1)"
- line 430, ".input.spin", state 333, "(1)"
- line 434, ".input.spin", state 346, "(1)"
- line 407, ".input.spin", state 383, "cache_dirty_urcu_active_readers = 0"
- line 412, ".input.spin", state 401, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 415, "cache_dirty_rcu_data[i] = 0"
- line 425, ".input.spin", state 447, "(1)"
- line 430, ".input.spin", state 464, "(1)"
- line 434, ".input.spin", state 477, "(1)"
- line 407, ".input.spin", state 522, "cache_dirty_urcu_active_readers = 0"
- line 412, ".input.spin", state 540, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 554, "cache_dirty_rcu_data[i] = 0"
- line 425, ".input.spin", state 586, "(1)"
- line 430, ".input.spin", state 603, "(1)"
- line 434, ".input.spin", state 616, "(1)"
- line 407, ".input.spin", state 651, "cache_dirty_urcu_active_readers = 0"
- line 412, ".input.spin", state 669, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 683, "cache_dirty_rcu_data[i] = 0"
- line 425, ".input.spin", state 715, "(1)"
- line 430, ".input.spin", state 732, "(1)"
- line 434, ".input.spin", state 745, "(1)"
- line 407, ".input.spin", state 782, "cache_dirty_urcu_active_readers = 0"
- line 412, ".input.spin", state 800, "cache_dirty_rcu_ptr = 0"
- line 416, ".input.spin", state 814, "cache_dirty_rcu_data[i] = 0"
- line 425, ".input.spin", state 846, "(1)"
- line 430, ".input.spin", state 863, "(1)"
- line 434, ".input.spin", state 876, "(1)"
- line 267, ".input.spin", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 940, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 955, "(1)"
- line 279, ".input.spin", state 962, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 978, "(1)"
- line 248, ".input.spin", state 986, "(1)"
- line 252, ".input.spin", state 998, "(1)"
- line 256, ".input.spin", state 1006, "(1)"
- line 267, ".input.spin", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1059, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1084, "(1)"
- line 248, ".input.spin", state 1092, "(1)"
- line 252, ".input.spin", state 1104, "(1)"
- line 256, ".input.spin", state 1112, "(1)"
- line 271, ".input.spin", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1151, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1176, "(1)"
- line 248, ".input.spin", state 1184, "(1)"
- line 252, ".input.spin", state 1196, "(1)"
- line 256, ".input.spin", state 1204, "(1)"
- line 267, ".input.spin", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1257, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1282, "(1)"
- line 248, ".input.spin", state 1290, "(1)"
- line 252, ".input.spin", state 1302, "(1)"
- line 256, ".input.spin", state 1310, "(1)"
- line 271, ".input.spin", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1349, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1374, "(1)"
- line 248, ".input.spin", state 1382, "(1)"
- line 252, ".input.spin", state 1394, "(1)"
- line 256, ".input.spin", state 1402, "(1)"
- line 267, ".input.spin", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1455, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1480, "(1)"
- line 248, ".input.spin", state 1488, "(1)"
- line 252, ".input.spin", state 1500, "(1)"
- line 256, ".input.spin", state 1508, "(1)"
- line 271, ".input.spin", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1547, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1572, "(1)"
- line 248, ".input.spin", state 1580, "(1)"
- line 252, ".input.spin", state 1592, "(1)"
- line 256, ".input.spin", state 1600, "(1)"
- line 267, ".input.spin", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1653, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1678, "(1)"
- line 248, ".input.spin", state 1686, "(1)"
- line 252, ".input.spin", state 1698, "(1)"
- line 256, ".input.spin", state 1706, "(1)"
- line 1122, ".input.spin", state 1722, "-end-"
- (103 of 1722 states)
-unreached in proctype :init:
- (0 of 26 states)
-
-pan: elapsed time 1.01e+03 seconds
-pan: rate 2639.775 states/second
-pan: avg transition delay 1.3764e-06 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1178)
-Depth= 3880 States= 1e+06 Transitions= 2.74e+08 Memory= 512.932 t= 435 R= 2e+03
-Depth= 3880 States= 2e+06 Transitions= 5.69e+08 Memory= 559.318 t= 929 R= 2e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 3880, errors: 0
- 2668047 states, stored
-7.3167024e+08 states, matched
-7.3433829e+08 transitions (= stored+matched)
-4.2954757e+09 atomic steps
-hash conflicts: 4.8818996e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 295.156 equivalent memory usage for states (stored*(State-vector + overhead))
- 124.292 actual memory usage for states (compression: 42.11%)
- state-vector as stored = 13 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 589.983 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 25912 2128 1970 2 1 ]
-unreached in proctype urcu_reader
- line 267, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 275, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 102, "(1)"
- line 248, "pan.___", state 110, "(1)"
- line 252, "pan.___", state 122, "(1)"
- line 256, "pan.___", state 130, "(1)"
- line 403, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 221, "(1)"
- line 430, "pan.___", state 251, "(1)"
- line 434, "pan.___", state 264, "(1)"
- line 613, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 403, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 357, "(1)"
- line 430, "pan.___", state 387, "(1)"
- line 434, "pan.___", state 400, "(1)"
- line 403, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 486, "(1)"
- line 430, "pan.___", state 516, "(1)"
- line 434, "pan.___", state 529, "(1)"
- line 403, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 403, "pan.___", state 554, "(1)"
- line 403, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 403, "pan.___", state 555, "else"
- line 403, "pan.___", state 558, "(1)"
- line 407, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 407, "pan.___", state 568, "(1)"
- line 407, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 407, "pan.___", state 569, "else"
- line 407, "pan.___", state 572, "(1)"
- line 407, "pan.___", state 573, "(1)"
- line 407, "pan.___", state 573, "(1)"
- line 405, "pan.___", state 578, "((i<1))"
- line 405, "pan.___", state 578, "((i>=1))"
- line 412, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 412, "pan.___", state 586, "(1)"
- line 412, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 412, "pan.___", state 587, "else"
- line 412, "pan.___", state 590, "(1)"
- line 412, "pan.___", state 591, "(1)"
- line 412, "pan.___", state 591, "(1)"
- line 416, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 416, "pan.___", state 600, "(1)"
- line 416, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 416, "pan.___", state 601, "else"
- line 416, "pan.___", state 604, "(1)"
- line 416, "pan.___", state 605, "(1)"
- line 416, "pan.___", state 605, "(1)"
- line 414, "pan.___", state 610, "((i<2))"
- line 414, "pan.___", state 610, "((i>=2))"
- line 421, "pan.___", state 617, "(1)"
- line 421, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 421, "pan.___", state 618, "else"
- line 421, "pan.___", state 621, "(1)"
- line 421, "pan.___", state 622, "(1)"
- line 421, "pan.___", state 622, "(1)"
- line 425, "pan.___", state 630, "(1)"
- line 425, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 425, "pan.___", state 631, "else"
- line 425, "pan.___", state 634, "(1)"
- line 425, "pan.___", state 635, "(1)"
- line 425, "pan.___", state 635, "(1)"
- line 423, "pan.___", state 640, "((i<1))"
- line 423, "pan.___", state 640, "((i>=1))"
- line 430, "pan.___", state 647, "(1)"
- line 430, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 430, "pan.___", state 648, "else"
- line 430, "pan.___", state 651, "(1)"
- line 430, "pan.___", state 652, "(1)"
- line 430, "pan.___", state 652, "(1)"
- line 434, "pan.___", state 660, "(1)"
- line 434, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 434, "pan.___", state 661, "else"
- line 434, "pan.___", state 664, "(1)"
- line 434, "pan.___", state 665, "(1)"
- line 434, "pan.___", state 665, "(1)"
- line 432, "pan.___", state 670, "((i<2))"
- line 432, "pan.___", state 670, "((i>=2))"
- line 442, "pan.___", state 674, "(1)"
- line 442, "pan.___", state 674, "(1)"
- line 613, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 613, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 613, "pan.___", state 679, "(1)"
- line 403, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 751, "(1)"
- line 430, "pan.___", state 781, "(1)"
- line 434, "pan.___", state 794, "(1)"
- line 403, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 886, "(1)"
- line 430, "pan.___", state 916, "(1)"
- line 434, "pan.___", state 929, "(1)"
- line 403, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 1015, "(1)"
- line 430, "pan.___", state 1045, "(1)"
- line 434, "pan.___", state 1058, "(1)"
- line 244, "pan.___", state 1091, "(1)"
- line 252, "pan.___", state 1111, "(1)"
- line 256, "pan.___", state 1119, "(1)"
- line 747, "pan.___", state 1136, "-end-"
- (91 of 1136 states)
-unreached in proctype urcu_writer
- line 403, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 110, "(1)"
- line 425, "pan.___", state 123, "(1)"
- line 430, "pan.___", state 140, "(1)"
- line 267, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 403, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 303, "(1)"
- line 425, "pan.___", state 316, "(1)"
- line 430, "pan.___", state 333, "(1)"
- line 434, "pan.___", state 346, "(1)"
- line 407, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 447, "(1)"
- line 430, "pan.___", state 464, "(1)"
- line 434, "pan.___", state 477, "(1)"
- line 407, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 586, "(1)"
- line 430, "pan.___", state 603, "(1)"
- line 434, "pan.___", state 616, "(1)"
- line 407, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 715, "(1)"
- line 430, "pan.___", state 732, "(1)"
- line 434, "pan.___", state 745, "(1)"
- line 407, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 846, "(1)"
- line 430, "pan.___", state 863, "(1)"
- line 434, "pan.___", state 876, "(1)"
- line 267, "pan.___", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 940, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 955, "(1)"
- line 279, "pan.___", state 962, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 978, "(1)"
- line 248, "pan.___", state 986, "(1)"
- line 252, "pan.___", state 998, "(1)"
- line 256, "pan.___", state 1006, "(1)"
- line 267, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1059, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1084, "(1)"
- line 248, "pan.___", state 1092, "(1)"
- line 252, "pan.___", state 1104, "(1)"
- line 256, "pan.___", state 1112, "(1)"
- line 271, "pan.___", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1151, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1176, "(1)"
- line 248, "pan.___", state 1184, "(1)"
- line 252, "pan.___", state 1196, "(1)"
- line 256, "pan.___", state 1204, "(1)"
- line 267, "pan.___", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1257, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1282, "(1)"
- line 248, "pan.___", state 1290, "(1)"
- line 252, "pan.___", state 1302, "(1)"
- line 256, "pan.___", state 1310, "(1)"
- line 271, "pan.___", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1349, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1374, "(1)"
- line 248, "pan.___", state 1382, "(1)"
- line 252, "pan.___", state 1394, "(1)"
- line 256, "pan.___", state 1402, "(1)"
- line 267, "pan.___", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1455, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1480, "(1)"
- line 248, "pan.___", state 1488, "(1)"
- line 252, "pan.___", state 1500, "(1)"
- line 256, "pan.___", state 1508, "(1)"
- line 271, "pan.___", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1547, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1572, "(1)"
- line 248, "pan.___", state 1580, "(1)"
- line 252, "pan.___", state 1592, "(1)"
- line 256, "pan.___", state 1600, "(1)"
- line 267, "pan.___", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1653, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1678, "(1)"
- line 248, "pan.___", state 1686, "(1)"
- line 252, "pan.___", state 1698, "(1)"
- line 256, "pan.___", state 1706, "(1)"
- line 1122, "pan.___", state 1722, "-end-"
- (103 of 1722 states)
-unreached in proctype :init:
- (0 of 26 states)
-unreached in proctype :never:
- line 1183, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.21e+03 seconds
-pan: rate 2200.5963 states/second
-pan: avg transition delay 1.651e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1179)
-pan: claim violated! (at depth 1246)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 3190, errors: 1
- 124498 states, stored
- 15198533 states, matched
- 15323031 transitions (= stored+matched)
- 86866126 atomic steps
-hash conflicts: 473423 (resolved)
-
-Stats on memory usage (in Megabytes):
- 13.773 equivalent memory usage for states (stored*(State-vector + overhead))
- 6.400 actual memory usage for states (compression: 46.47%)
- state-vector as stored = 18 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 472.111 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 2572 1245 179 2 2 ]
-unreached in proctype urcu_reader
- line 713, "pan.___", state 12, "((i<1))"
- line 713, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 404, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 223, "(1)"
- line 431, "pan.___", state 253, "(1)"
- line 435, "pan.___", state 266, "(1)"
- line 614, "pan.___", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 404, "pan.___", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 326, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 340, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 359, "(1)"
- line 431, "pan.___", state 389, "(1)"
- line 435, "pan.___", state 402, "(1)"
- line 404, "pan.___", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 455, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 469, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 488, "(1)"
- line 431, "pan.___", state 518, "(1)"
- line 435, "pan.___", state 531, "(1)"
- line 404, "pan.___", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 556, "(1)"
- line 404, "pan.___", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 557, "else"
- line 404, "pan.___", state 560, "(1)"
- line 408, "pan.___", state 568, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 570, "(1)"
- line 408, "pan.___", state 571, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 571, "else"
- line 408, "pan.___", state 574, "(1)"
- line 408, "pan.___", state 575, "(1)"
- line 408, "pan.___", state 575, "(1)"
- line 406, "pan.___", state 580, "((i<1))"
- line 406, "pan.___", state 580, "((i>=1))"
- line 413, "pan.___", state 586, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 588, "(1)"
- line 413, "pan.___", state 589, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 589, "else"
- line 413, "pan.___", state 592, "(1)"
- line 413, "pan.___", state 593, "(1)"
- line 413, "pan.___", state 593, "(1)"
- line 417, "pan.___", state 600, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 602, "(1)"
- line 417, "pan.___", state 603, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 603, "else"
- line 417, "pan.___", state 606, "(1)"
- line 417, "pan.___", state 607, "(1)"
- line 417, "pan.___", state 607, "(1)"
- line 415, "pan.___", state 612, "((i<2))"
- line 415, "pan.___", state 612, "((i>=2))"
- line 422, "pan.___", state 619, "(1)"
- line 422, "pan.___", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 620, "else"
- line 422, "pan.___", state 623, "(1)"
- line 422, "pan.___", state 624, "(1)"
- line 422, "pan.___", state 624, "(1)"
- line 426, "pan.___", state 632, "(1)"
- line 426, "pan.___", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 633, "else"
- line 426, "pan.___", state 636, "(1)"
- line 426, "pan.___", state 637, "(1)"
- line 426, "pan.___", state 637, "(1)"
- line 424, "pan.___", state 642, "((i<1))"
- line 424, "pan.___", state 642, "((i>=1))"
- line 431, "pan.___", state 649, "(1)"
- line 431, "pan.___", state 650, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 650, "else"
- line 431, "pan.___", state 653, "(1)"
- line 431, "pan.___", state 654, "(1)"
- line 431, "pan.___", state 654, "(1)"
- line 435, "pan.___", state 662, "(1)"
- line 435, "pan.___", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 663, "else"
- line 435, "pan.___", state 666, "(1)"
- line 435, "pan.___", state 667, "(1)"
- line 435, "pan.___", state 667, "(1)"
- line 433, "pan.___", state 672, "((i<2))"
- line 433, "pan.___", state 672, "((i>=2))"
- line 443, "pan.___", state 676, "(1)"
- line 443, "pan.___", state 676, "(1)"
- line 614, "pan.___", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 614, "pan.___", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 614, "pan.___", state 681, "(1)"
- line 404, "pan.___", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 720, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 734, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 753, "(1)"
- line 431, "pan.___", state 783, "(1)"
- line 435, "pan.___", state 796, "(1)"
- line 404, "pan.___", state 823, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 855, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 869, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 888, "(1)"
- line 431, "pan.___", state 918, "(1)"
- line 435, "pan.___", state 931, "(1)"
- line 404, "pan.___", state 952, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 984, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 998, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1017, "(1)"
- line 431, "pan.___", state 1047, "(1)"
- line 435, "pan.___", state 1060, "(1)"
- line 245, "pan.___", state 1093, "(1)"
- line 253, "pan.___", state 1113, "(1)"
- line 257, "pan.___", state 1121, "(1)"
- line 748, "pan.___", state 1138, "-end-"
- (92 of 1138 states)
-unreached in proctype urcu_writer
- line 837, "pan.___", state 12, "((i<1))"
- line 837, "pan.___", state 12, "((i>=1))"
- line 404, "pan.___", state 47, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 53, "(1)"
- line 408, "pan.___", state 61, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 67, "(1)"
- line 408, "pan.___", state 68, "(1)"
- line 408, "pan.___", state 68, "(1)"
- line 406, "pan.___", state 73, "((i<1))"
- line 406, "pan.___", state 73, "((i>=1))"
- line 413, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 85, "(1)"
- line 413, "pan.___", state 86, "(1)"
- line 413, "pan.___", state 86, "(1)"
- line 417, "pan.___", state 99, "(1)"
- line 417, "pan.___", state 100, "(1)"
- line 417, "pan.___", state 100, "(1)"
- line 415, "pan.___", state 105, "((i<2))"
- line 415, "pan.___", state 105, "((i>=2))"
- line 422, "pan.___", state 112, "(1)"
- line 422, "pan.___", state 113, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 113, "else"
- line 422, "pan.___", state 116, "(1)"
- line 422, "pan.___", state 117, "(1)"
- line 422, "pan.___", state 117, "(1)"
- line 426, "pan.___", state 125, "(1)"
- line 426, "pan.___", state 126, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 126, "else"
- line 426, "pan.___", state 129, "(1)"
- line 426, "pan.___", state 130, "(1)"
- line 426, "pan.___", state 130, "(1)"
- line 424, "pan.___", state 135, "((i<1))"
- line 424, "pan.___", state 135, "((i>=1))"
- line 431, "pan.___", state 142, "(1)"
- line 431, "pan.___", state 143, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 143, "else"
- line 431, "pan.___", state 146, "(1)"
- line 431, "pan.___", state 147, "(1)"
- line 431, "pan.___", state 147, "(1)"
- line 435, "pan.___", state 155, "(1)"
- line 435, "pan.___", state 156, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 156, "else"
- line 435, "pan.___", state 159, "(1)"
- line 435, "pan.___", state 160, "(1)"
- line 435, "pan.___", state 160, "(1)"
- line 433, "pan.___", state 165, "((i<2))"
- line 433, "pan.___", state 165, "((i>=2))"
- line 443, "pan.___", state 169, "(1)"
- line 443, "pan.___", state 169, "(1)"
- line 268, "pan.___", state 178, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 187, "cache_dirty_urcu_active_readers = 0"
- line 270, "pan.___", state 195, "((i<1))"
- line 270, "pan.___", state 195, "((i>=1))"
- line 276, "pan.___", state 200, "cache_dirty_rcu_ptr = 0"
- line 907, "pan.___", state 228, "old_data = cached_rcu_ptr"
- line 918, "pan.___", state 232, "_proc_urcu_writer = (_proc_urcu_writer|(1<<4))"
- line 404, "pan.___", state 240, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 246, "(1)"
- line 408, "pan.___", state 254, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 260, "(1)"
- line 408, "pan.___", state 261, "(1)"
- line 408, "pan.___", state 261, "(1)"
- line 406, "pan.___", state 266, "((i<1))"
- line 406, "pan.___", state 266, "((i>=1))"
- line 413, "pan.___", state 274, "(1)"
- line 413, "pan.___", state 275, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 275, "else"
- line 413, "pan.___", state 278, "(1)"
- line 413, "pan.___", state 279, "(1)"
- line 413, "pan.___", state 279, "(1)"
- line 417, "pan.___", state 286, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 292, "(1)"
- line 417, "pan.___", state 293, "(1)"
- line 417, "pan.___", state 293, "(1)"
- line 415, "pan.___", state 298, "((i<2))"
- line 415, "pan.___", state 298, "((i>=2))"
- line 422, "pan.___", state 305, "(1)"
- line 422, "pan.___", state 306, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 306, "else"
- line 422, "pan.___", state 309, "(1)"
- line 422, "pan.___", state 310, "(1)"
- line 422, "pan.___", state 310, "(1)"
- line 426, "pan.___", state 318, "(1)"
- line 426, "pan.___", state 319, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 319, "else"
- line 426, "pan.___", state 322, "(1)"
- line 426, "pan.___", state 323, "(1)"
- line 426, "pan.___", state 323, "(1)"
- line 424, "pan.___", state 328, "((i<1))"
- line 424, "pan.___", state 328, "((i>=1))"
- line 431, "pan.___", state 335, "(1)"
- line 431, "pan.___", state 336, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 336, "else"
- line 431, "pan.___", state 339, "(1)"
- line 431, "pan.___", state 340, "(1)"
- line 431, "pan.___", state 340, "(1)"
- line 435, "pan.___", state 348, "(1)"
- line 435, "pan.___", state 349, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 349, "else"
- line 435, "pan.___", state 352, "(1)"
- line 435, "pan.___", state 353, "(1)"
- line 435, "pan.___", state 353, "(1)"
- line 433, "pan.___", state 358, "((i<2))"
- line 433, "pan.___", state 358, "((i>=2))"
- line 443, "pan.___", state 362, "(1)"
- line 443, "pan.___", state 362, "(1)"
- line 404, "pan.___", state 373, "(1)"
- line 404, "pan.___", state 374, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 374, "else"
- line 404, "pan.___", state 377, "(1)"
- line 408, "pan.___", state 385, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 391, "(1)"
- line 408, "pan.___", state 392, "(1)"
- line 408, "pan.___", state 392, "(1)"
- line 406, "pan.___", state 397, "((i<1))"
- line 406, "pan.___", state 397, "((i>=1))"
- line 413, "pan.___", state 403, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 409, "(1)"
- line 413, "pan.___", state 410, "(1)"
- line 413, "pan.___", state 410, "(1)"
- line 417, "pan.___", state 417, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 423, "(1)"
- line 417, "pan.___", state 424, "(1)"
- line 417, "pan.___", state 424, "(1)"
- line 415, "pan.___", state 429, "((i<2))"
- line 415, "pan.___", state 429, "((i>=2))"
- line 422, "pan.___", state 436, "(1)"
- line 422, "pan.___", state 437, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 437, "else"
- line 422, "pan.___", state 440, "(1)"
- line 422, "pan.___", state 441, "(1)"
- line 422, "pan.___", state 441, "(1)"
- line 426, "pan.___", state 449, "(1)"
- line 426, "pan.___", state 450, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 450, "else"
- line 426, "pan.___", state 453, "(1)"
- line 426, "pan.___", state 454, "(1)"
- line 426, "pan.___", state 454, "(1)"
- line 424, "pan.___", state 459, "((i<1))"
- line 424, "pan.___", state 459, "((i>=1))"
- line 431, "pan.___", state 466, "(1)"
- line 431, "pan.___", state 467, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 467, "else"
- line 431, "pan.___", state 470, "(1)"
- line 431, "pan.___", state 471, "(1)"
- line 431, "pan.___", state 471, "(1)"
- line 435, "pan.___", state 479, "(1)"
- line 435, "pan.___", state 480, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 480, "else"
- line 435, "pan.___", state 483, "(1)"
- line 435, "pan.___", state 484, "(1)"
- line 435, "pan.___", state 484, "(1)"
- line 433, "pan.___", state 489, "((i<2))"
- line 433, "pan.___", state 489, "((i>=2))"
- line 443, "pan.___", state 493, "(1)"
- line 443, "pan.___", state 493, "(1)"
- line 972, "pan.___", state 504, "_proc_urcu_writer = (_proc_urcu_writer&~((1<<9)))"
- line 977, "pan.___", state 505, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<8)|(1<<7))))"
- line 404, "pan.___", state 510, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 516, "(1)"
- line 408, "pan.___", state 524, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 530, "(1)"
- line 408, "pan.___", state 531, "(1)"
- line 408, "pan.___", state 531, "(1)"
- line 406, "pan.___", state 536, "((i<1))"
- line 406, "pan.___", state 536, "((i>=1))"
- line 413, "pan.___", state 542, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 548, "(1)"
- line 413, "pan.___", state 549, "(1)"
- line 413, "pan.___", state 549, "(1)"
- line 417, "pan.___", state 556, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 562, "(1)"
- line 417, "pan.___", state 563, "(1)"
- line 417, "pan.___", state 563, "(1)"
- line 415, "pan.___", state 568, "((i<2))"
- line 415, "pan.___", state 568, "((i>=2))"
- line 422, "pan.___", state 575, "(1)"
- line 422, "pan.___", state 576, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 576, "else"
- line 422, "pan.___", state 579, "(1)"
- line 422, "pan.___", state 580, "(1)"
- line 422, "pan.___", state 580, "(1)"
- line 426, "pan.___", state 588, "(1)"
- line 426, "pan.___", state 589, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 589, "else"
- line 426, "pan.___", state 592, "(1)"
- line 426, "pan.___", state 593, "(1)"
- line 426, "pan.___", state 593, "(1)"
- line 424, "pan.___", state 598, "((i<1))"
- line 424, "pan.___", state 598, "((i>=1))"
- line 431, "pan.___", state 605, "(1)"
- line 431, "pan.___", state 606, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 606, "else"
- line 431, "pan.___", state 609, "(1)"
- line 431, "pan.___", state 610, "(1)"
- line 431, "pan.___", state 610, "(1)"
- line 435, "pan.___", state 618, "(1)"
- line 435, "pan.___", state 619, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 619, "else"
- line 435, "pan.___", state 622, "(1)"
- line 435, "pan.___", state 623, "(1)"
- line 435, "pan.___", state 623, "(1)"
- line 443, "pan.___", state 632, "(1)"
- line 443, "pan.___", state 632, "(1)"
- line 404, "pan.___", state 639, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 653, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 671, "cache_dirty_rcu_ptr = 0"
- line 422, "pan.___", state 704, "(1)"
- line 426, "pan.___", state 717, "(1)"
- line 431, "pan.___", state 734, "(1)"
- line 435, "pan.___", state 747, "(1)"
- line 408, "pan.___", state 784, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 802, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 816, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 848, "(1)"
- line 431, "pan.___", state 865, "(1)"
- line 435, "pan.___", state 878, "(1)"
- line 1054, "pan.___", state 905, "_proc_urcu_writer = (_proc_urcu_writer|(1<<13))"
- line 268, "pan.___", state 933, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 935, "(1)"
- line 272, "pan.___", state 942, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 944, "(1)"
- line 272, "pan.___", state 945, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 945, "else"
- line 270, "pan.___", state 950, "((i<1))"
- line 270, "pan.___", state 950, "((i>=1))"
- line 276, "pan.___", state 955, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 957, "(1)"
- line 276, "pan.___", state 958, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 958, "else"
- line 280, "pan.___", state 964, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 966, "(1)"
- line 280, "pan.___", state 967, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 967, "else"
- line 278, "pan.___", state 972, "((i<2))"
- line 278, "pan.___", state 972, "((i>=2))"
- line 245, "pan.___", state 980, "(1)"
- line 249, "pan.___", state 988, "(1)"
- line 249, "pan.___", state 989, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 989, "else"
- line 247, "pan.___", state 994, "((i<1))"
- line 247, "pan.___", state 994, "((i>=1))"
- line 253, "pan.___", state 1000, "(1)"
- line 253, "pan.___", state 1001, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1001, "else"
- line 257, "pan.___", state 1008, "(1)"
- line 257, "pan.___", state 1009, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1009, "else"
- line 262, "pan.___", state 1018, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1018, "else"
- line 1108, "pan.___", state 1034, "((i<1))"
- line 1108, "pan.___", state 1034, "((i>=1))"
- line 268, "pan.___", state 1039, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1041, "(1)"
- line 272, "pan.___", state 1048, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1050, "(1)"
- line 272, "pan.___", state 1051, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1051, "else"
- line 270, "pan.___", state 1056, "((i<1))"
- line 270, "pan.___", state 1056, "((i>=1))"
- line 276, "pan.___", state 1061, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1063, "(1)"
- line 276, "pan.___", state 1064, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1064, "else"
- line 280, "pan.___", state 1070, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1072, "(1)"
- line 280, "pan.___", state 1073, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1073, "else"
- line 278, "pan.___", state 1078, "((i<2))"
- line 278, "pan.___", state 1078, "((i>=2))"
- line 245, "pan.___", state 1086, "(1)"
- line 249, "pan.___", state 1094, "(1)"
- line 249, "pan.___", state 1095, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1095, "else"
- line 247, "pan.___", state 1100, "((i<1))"
- line 247, "pan.___", state 1100, "((i>=1))"
- line 253, "pan.___", state 1106, "(1)"
- line 253, "pan.___", state 1107, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1107, "else"
- line 257, "pan.___", state 1114, "(1)"
- line 257, "pan.___", state 1115, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1115, "else"
- line 262, "pan.___", state 1124, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1124, "else"
- line 295, "pan.___", state 1126, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1126, "else"
- line 1108, "pan.___", state 1127, "(cache_dirty_urcu_gp_ctr)"
- line 1108, "pan.___", state 1127, "else"
- line 268, "pan.___", state 1131, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1133, "(1)"
- line 272, "pan.___", state 1140, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1142, "(1)"
- line 272, "pan.___", state 1143, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1143, "else"
- line 270, "pan.___", state 1148, "((i<1))"
- line 270, "pan.___", state 1148, "((i>=1))"
- line 276, "pan.___", state 1153, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1155, "(1)"
- line 276, "pan.___", state 1156, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1156, "else"
- line 280, "pan.___", state 1162, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1164, "(1)"
- line 280, "pan.___", state 1165, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1165, "else"
- line 278, "pan.___", state 1170, "((i<2))"
- line 278, "pan.___", state 1170, "((i>=2))"
- line 245, "pan.___", state 1178, "(1)"
- line 249, "pan.___", state 1186, "(1)"
- line 249, "pan.___", state 1187, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1187, "else"
- line 247, "pan.___", state 1192, "((i<1))"
- line 247, "pan.___", state 1192, "((i>=1))"
- line 253, "pan.___", state 1198, "(1)"
- line 253, "pan.___", state 1199, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1199, "else"
- line 257, "pan.___", state 1206, "(1)"
- line 257, "pan.___", state 1207, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1207, "else"
- line 262, "pan.___", state 1216, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1216, "else"
- line 1112, "pan.___", state 1219, "i = 0"
- line 1112, "pan.___", state 1221, "reader_barrier = 1"
- line 1112, "pan.___", state 1232, "((i<1))"
- line 1112, "pan.___", state 1232, "((i>=1))"
- line 268, "pan.___", state 1237, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1239, "(1)"
- line 272, "pan.___", state 1246, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1248, "(1)"
- line 272, "pan.___", state 1249, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1249, "else"
- line 270, "pan.___", state 1254, "((i<1))"
- line 270, "pan.___", state 1254, "((i>=1))"
- line 276, "pan.___", state 1259, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1261, "(1)"
- line 276, "pan.___", state 1262, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1262, "else"
- line 280, "pan.___", state 1268, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1270, "(1)"
- line 280, "pan.___", state 1271, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1271, "else"
- line 278, "pan.___", state 1276, "((i<2))"
- line 278, "pan.___", state 1276, "((i>=2))"
- line 245, "pan.___", state 1284, "(1)"
- line 249, "pan.___", state 1292, "(1)"
- line 249, "pan.___", state 1293, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1293, "else"
- line 247, "pan.___", state 1298, "((i<1))"
- line 247, "pan.___", state 1298, "((i>=1))"
- line 253, "pan.___", state 1304, "(1)"
- line 253, "pan.___", state 1305, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1305, "else"
- line 257, "pan.___", state 1312, "(1)"
- line 257, "pan.___", state 1313, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1313, "else"
- line 262, "pan.___", state 1322, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1322, "else"
- line 295, "pan.___", state 1324, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1324, "else"
- line 1112, "pan.___", state 1325, "(cache_dirty_urcu_gp_ctr)"
- line 1112, "pan.___", state 1325, "else"
- line 272, "pan.___", state 1338, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1351, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1360, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1376, "(1)"
- line 249, "pan.___", state 1384, "(1)"
- line 253, "pan.___", state 1396, "(1)"
- line 257, "pan.___", state 1404, "(1)"
- line 268, "pan.___", state 1435, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1444, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1457, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1466, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1482, "(1)"
- line 249, "pan.___", state 1490, "(1)"
- line 253, "pan.___", state 1502, "(1)"
- line 257, "pan.___", state 1510, "(1)"
- line 268, "pan.___", state 1527, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1529, "(1)"
- line 272, "pan.___", state 1536, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1538, "(1)"
- line 272, "pan.___", state 1539, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1539, "else"
- line 270, "pan.___", state 1544, "((i<1))"
- line 270, "pan.___", state 1544, "((i>=1))"
- line 276, "pan.___", state 1549, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1551, "(1)"
- line 276, "pan.___", state 1552, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1552, "else"
- line 280, "pan.___", state 1558, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1560, "(1)"
- line 280, "pan.___", state 1561, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1561, "else"
- line 278, "pan.___", state 1566, "((i<2))"
- line 278, "pan.___", state 1566, "((i>=2))"
- line 245, "pan.___", state 1574, "(1)"
- line 249, "pan.___", state 1582, "(1)"
- line 249, "pan.___", state 1583, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1583, "else"
- line 247, "pan.___", state 1588, "((i<1))"
- line 247, "pan.___", state 1588, "((i>=1))"
- line 253, "pan.___", state 1594, "(1)"
- line 253, "pan.___", state 1595, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1595, "else"
- line 257, "pan.___", state 1602, "(1)"
- line 257, "pan.___", state 1603, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1603, "else"
- line 262, "pan.___", state 1612, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1612, "else"
- line 1119, "pan.___", state 1615, "i = 0"
- line 1119, "pan.___", state 1617, "reader_barrier = 1"
- line 1119, "pan.___", state 1628, "((i<1))"
- line 1119, "pan.___", state 1628, "((i>=1))"
- line 268, "pan.___", state 1633, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1635, "(1)"
- line 272, "pan.___", state 1642, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1644, "(1)"
- line 272, "pan.___", state 1645, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1645, "else"
- line 270, "pan.___", state 1650, "((i<1))"
- line 270, "pan.___", state 1650, "((i>=1))"
- line 276, "pan.___", state 1655, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1657, "(1)"
- line 276, "pan.___", state 1658, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1658, "else"
- line 280, "pan.___", state 1664, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1666, "(1)"
- line 280, "pan.___", state 1667, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1667, "else"
- line 278, "pan.___", state 1672, "((i<2))"
- line 278, "pan.___", state 1672, "((i>=2))"
- line 245, "pan.___", state 1680, "(1)"
- line 249, "pan.___", state 1688, "(1)"
- line 249, "pan.___", state 1689, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1689, "else"
- line 247, "pan.___", state 1694, "((i<1))"
- line 247, "pan.___", state 1694, "((i>=1))"
- line 253, "pan.___", state 1700, "(1)"
- line 253, "pan.___", state 1701, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1701, "else"
- line 257, "pan.___", state 1708, "(1)"
- line 257, "pan.___", state 1709, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1709, "else"
- line 262, "pan.___", state 1718, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1718, "else"
- line 295, "pan.___", state 1720, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1720, "else"
- line 1119, "pan.___", state 1721, "(cache_dirty_urcu_gp_ctr)"
- line 1119, "pan.___", state 1721, "else"
- line 1123, "pan.___", state 1724, "-end-"
- (312 of 1724 states)
-unreached in proctype :init:
- line 1138, "pan.___", state 11, "((i<1))"
- line 1138, "pan.___", state 11, "((i>=1))"
- (1 of 26 states)
-unreached in proctype :never:
- line 1184, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 23.7 seconds
-pan: rate 5259.7381 states/second
-pan: avg transition delay 1.5447e-06 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define NO_MB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2890
-2:2:1138
-3:2:1143
-4:2:1147
-5:2:1155
-6:2:1159
-7:2:1163
-8:0:2890
-9:1:0
-10:1:5
-11:1:9
-12:1:17
-13:1:21
-14:1:25
-15:0:2890
-16:3:2862
-17:3:2865
-18:3:2870
-19:3:2877
-20:3:2880
-21:3:2884
-22:3:2885
-23:0:2890
-24:3:2887
-25:0:2890
-26:2:1167
-27:0:2890
-28:2:1173
-29:0:2890
-30:2:1174
-31:0:2890
-32:2:1176
-33:0:2890
-34:2:1177
-35:0:2890
-36:2:1178
-37:0:2890
-38:2:1179
-39:0:2890
-40:2:1180
-41:2:1181
-42:2:1185
-43:2:1186
-44:2:1194
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-1015:1:43
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-1019:1:44
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-1021:2:2063
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-1025:2:2062
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-1029:2:2063
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-1041:1:308
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-1188:1:785
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-1230:1:1097
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-1237:1:1124
-1238:1:1128
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-1240:2:2063
-1241:0:2890
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-1246:0:2894
-1247:1:1049
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1179)
-pan: claim violated! (at depth 1476)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 3979, errors: 1
- 430584 states, stored
- 99483765 states, matched
- 99914349 transitions (= stored+matched)
-5.7035561e+08 atomic steps
-hash conflicts: 13587432 (resolved)
-
-Stats on memory usage (in Megabytes):
- 47.634 equivalent memory usage for states (stored*(State-vector + overhead))
- 20.652 actual memory usage for states (compression: 43.36%)
- state-vector as stored = 14 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 486.369 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 7914 682 569 2 2 ]
-unreached in proctype urcu_reader
- line 713, "pan.___", state 12, "((i<1))"
- line 713, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 102, "(1)"
- line 249, "pan.___", state 110, "(1)"
- line 253, "pan.___", state 122, "(1)"
- line 257, "pan.___", state 130, "(1)"
- line 404, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 221, "(1)"
- line 431, "pan.___", state 251, "(1)"
- line 435, "pan.___", state 264, "(1)"
- line 614, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 404, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 357, "(1)"
- line 431, "pan.___", state 387, "(1)"
- line 435, "pan.___", state 400, "(1)"
- line 404, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 486, "(1)"
- line 431, "pan.___", state 516, "(1)"
- line 435, "pan.___", state 529, "(1)"
- line 404, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 554, "(1)"
- line 404, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 555, "else"
- line 404, "pan.___", state 558, "(1)"
- line 408, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 568, "(1)"
- line 408, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 569, "else"
- line 408, "pan.___", state 572, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 406, "pan.___", state 578, "((i<1))"
- line 406, "pan.___", state 578, "((i>=1))"
- line 413, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 586, "(1)"
- line 413, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 587, "else"
- line 413, "pan.___", state 590, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 417, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 600, "(1)"
- line 417, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 601, "else"
- line 417, "pan.___", state 604, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 415, "pan.___", state 610, "((i<2))"
- line 415, "pan.___", state 610, "((i>=2))"
- line 422, "pan.___", state 617, "(1)"
- line 422, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 618, "else"
- line 422, "pan.___", state 621, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 426, "pan.___", state 630, "(1)"
- line 426, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 631, "else"
- line 426, "pan.___", state 634, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 424, "pan.___", state 640, "((i<1))"
- line 424, "pan.___", state 640, "((i>=1))"
- line 431, "pan.___", state 647, "(1)"
- line 431, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 648, "else"
- line 431, "pan.___", state 651, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 435, "pan.___", state 660, "(1)"
- line 435, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 661, "else"
- line 435, "pan.___", state 664, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 433, "pan.___", state 670, "((i<2))"
- line 433, "pan.___", state 670, "((i>=2))"
- line 443, "pan.___", state 674, "(1)"
- line 443, "pan.___", state 674, "(1)"
- line 614, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 614, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 614, "pan.___", state 679, "(1)"
- line 404, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 751, "(1)"
- line 431, "pan.___", state 781, "(1)"
- line 435, "pan.___", state 794, "(1)"
- line 404, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 886, "(1)"
- line 431, "pan.___", state 916, "(1)"
- line 435, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1015, "(1)"
- line 431, "pan.___", state 1045, "(1)"
- line 435, "pan.___", state 1058, "(1)"
- line 404, "pan.___", state 1091, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 1123, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 1137, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1156, "(1)"
- line 431, "pan.___", state 1186, "(1)"
- line 435, "pan.___", state 1199, "(1)"
- line 748, "pan.___", state 1220, "-end-"
- (95 of 1220 states)
-unreached in proctype urcu_writer
- line 837, "pan.___", state 12, "((i<1))"
- line 837, "pan.___", state 12, "((i>=1))"
- line 404, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 51, "(1)"
- line 408, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 65, "(1)"
- line 408, "pan.___", state 66, "(1)"
- line 408, "pan.___", state 66, "(1)"
- line 406, "pan.___", state 71, "((i<1))"
- line 406, "pan.___", state 71, "((i>=1))"
- line 413, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 83, "(1)"
- line 413, "pan.___", state 84, "(1)"
- line 413, "pan.___", state 84, "(1)"
- line 417, "pan.___", state 97, "(1)"
- line 417, "pan.___", state 98, "(1)"
- line 417, "pan.___", state 98, "(1)"
- line 415, "pan.___", state 103, "((i<2))"
- line 415, "pan.___", state 103, "((i>=2))"
- line 422, "pan.___", state 110, "(1)"
- line 422, "pan.___", state 111, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 111, "else"
- line 422, "pan.___", state 114, "(1)"
- line 422, "pan.___", state 115, "(1)"
- line 422, "pan.___", state 115, "(1)"
- line 426, "pan.___", state 123, "(1)"
- line 426, "pan.___", state 124, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 124, "else"
- line 426, "pan.___", state 127, "(1)"
- line 426, "pan.___", state 128, "(1)"
- line 426, "pan.___", state 128, "(1)"
- line 424, "pan.___", state 133, "((i<1))"
- line 424, "pan.___", state 133, "((i>=1))"
- line 431, "pan.___", state 140, "(1)"
- line 431, "pan.___", state 141, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 141, "else"
- line 431, "pan.___", state 144, "(1)"
- line 431, "pan.___", state 145, "(1)"
- line 431, "pan.___", state 145, "(1)"
- line 435, "pan.___", state 153, "(1)"
- line 435, "pan.___", state 154, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 154, "else"
- line 435, "pan.___", state 157, "(1)"
- line 435, "pan.___", state 158, "(1)"
- line 435, "pan.___", state 158, "(1)"
- line 433, "pan.___", state 163, "((i<2))"
- line 433, "pan.___", state 163, "((i>=2))"
- line 443, "pan.___", state 167, "(1)"
- line 443, "pan.___", state 167, "(1)"
- line 268, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 404, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 303, "(1)"
- line 426, "pan.___", state 316, "(1)"
- line 431, "pan.___", state 333, "(1)"
- line 435, "pan.___", state 346, "(1)"
- line 408, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 447, "(1)"
- line 431, "pan.___", state 464, "(1)"
- line 435, "pan.___", state 477, "(1)"
- line 408, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 586, "(1)"
- line 431, "pan.___", state 603, "(1)"
- line 435, "pan.___", state 616, "(1)"
- line 408, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 715, "(1)"
- line 431, "pan.___", state 732, "(1)"
- line 435, "pan.___", state 745, "(1)"
- line 408, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 846, "(1)"
- line 431, "pan.___", state 863, "(1)"
- line 435, "pan.___", state 876, "(1)"
- line 268, "pan.___", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 940, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 955, "(1)"
- line 280, "pan.___", state 962, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 978, "(1)"
- line 249, "pan.___", state 986, "(1)"
- line 253, "pan.___", state 998, "(1)"
- line 257, "pan.___", state 1006, "(1)"
- line 268, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1059, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1084, "(1)"
- line 249, "pan.___", state 1092, "(1)"
- line 253, "pan.___", state 1104, "(1)"
- line 257, "pan.___", state 1112, "(1)"
- line 272, "pan.___", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1151, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1176, "(1)"
- line 249, "pan.___", state 1184, "(1)"
- line 253, "pan.___", state 1196, "(1)"
- line 257, "pan.___", state 1204, "(1)"
- line 268, "pan.___", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1257, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1282, "(1)"
- line 249, "pan.___", state 1290, "(1)"
- line 253, "pan.___", state 1302, "(1)"
- line 257, "pan.___", state 1310, "(1)"
- line 272, "pan.___", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1349, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1374, "(1)"
- line 249, "pan.___", state 1382, "(1)"
- line 253, "pan.___", state 1394, "(1)"
- line 257, "pan.___", state 1402, "(1)"
- line 268, "pan.___", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1455, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1480, "(1)"
- line 249, "pan.___", state 1488, "(1)"
- line 253, "pan.___", state 1500, "(1)"
- line 257, "pan.___", state 1508, "(1)"
- line 272, "pan.___", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1547, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1572, "(1)"
- line 249, "pan.___", state 1580, "(1)"
- line 253, "pan.___", state 1592, "(1)"
- line 257, "pan.___", state 1600, "(1)"
- line 268, "pan.___", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1653, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1678, "(1)"
- line 249, "pan.___", state 1686, "(1)"
- line 253, "pan.___", state 1698, "(1)"
- line 257, "pan.___", state 1706, "(1)"
- line 1123, "pan.___", state 1722, "-end-"
- (129 of 1722 states)
-unreached in proctype :init:
- line 1138, "pan.___", state 11, "((i<1))"
- line 1138, "pan.___", state 11, "((i>=1))"
- (1 of 26 states)
-unreached in proctype :never:
- line 1184, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 155 seconds
-pan: rate 2784.0683 states/second
-pan: avg transition delay 1.5479e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define NO_RMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2970
-2:2:1220
-3:2:1225
-4:2:1229
-5:2:1237
-6:2:1241
-7:2:1245
-8:0:2970
-9:1:0
-10:1:5
-11:1:9
-12:1:17
-13:1:21
-14:1:25
-15:0:2970
-16:3:2942
-17:3:2945
-18:3:2950
-19:3:2957
-20:3:2960
-21:3:2964
-22:3:2965
-23:0:2970
-24:3:2967
-25:0:2970
-26:2:1249
-27:0:2970
-28:2:1255
-29:0:2970
-30:2:1256
-31:0:2970
-32:2:1258
-33:0:2970
-34:2:1259
-35:0:2970
-36:2:1260
-37:2:1261
-38:2:1265
-39:2:1266
-40:2:1274
-41:2:1275
-42:2:1279
-43:2:1280
-44:2:1288
-45:2:1293
-46:2:1297
-47:2:1298
-48:2:1306
-49:2:1307
-50:2:1311
-51:2:1312
-52:2:1306
-53:2:1307
-54:2:1311
-55:2:1312
-56:2:1320
-57:2:1325
-58:2:1326
-59:2:1337
-60:2:1338
-61:2:1339
-62:2:1350
-63:2:1355
-64:2:1356
-65:2:1367
-66:2:1368
-67:2:1369
-68:2:1367
-69:2:1368
-70:2:1369
-71:2:1380
-72:2:1388
-73:0:2970
-74:2:1259
-75:0:2970
-76:2:1392
-77:2:1396
-78:2:1397
-79:2:1401
-80:2:1405
-81:2:1406
-82:2:1410
-83:2:1418
-84:2:1419
-85:2:1423
-86:2:1427
-87:2:1428
-88:2:1423
-89:2:1424
-90:2:1432
-91:0:2970
-92:2:1259
-93:0:2970
-94:2:1440
-95:2:1441
-96:2:1442
-97:0:2970
-98:2:1259
-99:0:2970
-100:2:1447
-101:0:2970
-102:2:2151
-103:2:2152
-104:2:2156
-105:2:2160
-106:2:2161
-107:2:2165
-108:2:2170
-109:2:2178
-110:2:2182
-111:2:2183
-112:2:2178
-113:2:2182
-114:2:2183
-115:2:2187
-116:2:2194
-117:2:2201
-118:2:2202
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-1244:1:42
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-1246:2:2242
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-1252:2:2241
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-1258:1:287
-1259:1:288
-1260:1:292
-1261:1:293
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-1263:1:302
-1264:1:306
-1265:1:307
-1266:1:315
-1267:1:320
-1268:1:324
-1269:1:325
-1270:1:333
-1271:1:334
-1272:1:338
-1273:1:339
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-1275:1:334
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-1277:1:339
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-1279:1:352
-1280:1:353
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-1282:1:365
-1283:1:366
-1284:1:377
-1285:1:382
-1286:1:383
-1287:1:394
-1288:1:395
-1289:1:396
-1290:1:394
-1291:1:402
-1292:1:403
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-1295:1:40
-1296:0:2970
-1297:1:41
-1298:0:2970
-1299:2:2241
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-1301:1:42
-1302:0:2970
-1303:2:2242
-1304:0:2970
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-1313:2:2242
-1314:0:2970
-1315:1:416
-1316:1:417
-1317:1:421
-1318:1:422
-1319:1:430
-1320:1:431
-1321:1:435
-1322:1:436
-1323:1:444
-1324:1:449
-1325:1:453
-1326:1:454
-1327:1:462
-1328:1:463
-1329:1:467
-1330:1:468
-1331:1:462
-1332:1:463
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-1334:1:468
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-1340:1:495
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-1353:1:40
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-1373:1:681
-1374:1:682
-1375:1:686
-1376:1:687
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-1378:1:696
-1379:1:697
-1380:1:709
-1381:1:714
-1382:1:718
-1383:1:719
-1384:1:727
-1385:1:728
-1386:1:732
-1387:1:733
-1388:1:727
-1389:1:728
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-1391:1:733
-1392:1:741
-1393:1:746
-1394:1:747
-1395:1:758
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-1397:1:760
-1398:1:771
-1399:1:776
-1400:1:777
-1401:1:788
-1402:1:789
-1403:1:790
-1404:1:788
-1405:1:796
-1406:1:797
-1407:1:801
-1408:0:2970
-1409:1:40
-1410:0:2970
-1411:1:41
-1412:0:2970
-1413:2:2241
-1414:0:2970
-1415:1:42
-1416:0:2970
-1417:2:2242
-1418:0:2970
-1419:1:143
-1420:0:2970
-1421:1:145
-1422:0:2970
-1423:2:2241
-1424:0:2970
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-1427:2:2242
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-1429:1:810
-1430:0:2970
-1431:2:2241
-1432:0:2970
-1433:1:1087
-1434:1:1091
-1435:1:1092
-1436:1:1100
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-1438:1:1105
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-1440:1:1114
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-1442:1:1123
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-1444:1:1132
-1445:1:1133
-1446:1:1137
-1447:1:1138
-1448:1:1132
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-1458:1:1176
-1459:1:1181
-1460:1:1182
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-1462:1:1194
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-1467:1:1206
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-1469:0:2970
-1470:2:2242
-1471:0:2970
-1472:1:812
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-1474:0:2968
-1475:1:40
-1476:0:2974
-1477:1:1060
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1179)
-Depth= 3829 States= 1e+06 Transitions= 2.15e+08 Memory= 512.834 t= 341 R= 3e+03
-Depth= 3829 States= 2e+06 Transitions= 5.61e+08 Memory= 559.026 t= 920 R= 2e+03
-pan: claim violated! (at depth 1358)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 3829, errors: 1
- 2932262 states, stored
-7.8211443e+08 states, matched
-7.850467e+08 transitions (= stored+matched)
-4.5802467e+09 atomic steps
-hash conflicts: 5.9075827e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 324.385 equivalent memory usage for states (stored*(State-vector + overhead))
- 136.208 actual memory usage for states (compression: 41.99%)
- state-vector as stored = 13 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 601.897 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 22861 1831 2500 2 2 ]
-unreached in proctype urcu_reader
- line 713, "pan.___", state 12, "((i<1))"
- line 713, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 102, "(1)"
- line 249, "pan.___", state 110, "(1)"
- line 253, "pan.___", state 122, "(1)"
- line 257, "pan.___", state 130, "(1)"
- line 404, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 221, "(1)"
- line 431, "pan.___", state 251, "(1)"
- line 435, "pan.___", state 264, "(1)"
- line 614, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 404, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 357, "(1)"
- line 431, "pan.___", state 387, "(1)"
- line 435, "pan.___", state 400, "(1)"
- line 404, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 486, "(1)"
- line 431, "pan.___", state 516, "(1)"
- line 435, "pan.___", state 529, "(1)"
- line 404, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 554, "(1)"
- line 404, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 555, "else"
- line 404, "pan.___", state 558, "(1)"
- line 408, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 568, "(1)"
- line 408, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 569, "else"
- line 408, "pan.___", state 572, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 406, "pan.___", state 578, "((i<1))"
- line 406, "pan.___", state 578, "((i>=1))"
- line 413, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 586, "(1)"
- line 413, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 587, "else"
- line 413, "pan.___", state 590, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 417, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 600, "(1)"
- line 417, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 601, "else"
- line 417, "pan.___", state 604, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 415, "pan.___", state 610, "((i<2))"
- line 415, "pan.___", state 610, "((i>=2))"
- line 422, "pan.___", state 617, "(1)"
- line 422, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 618, "else"
- line 422, "pan.___", state 621, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 426, "pan.___", state 630, "(1)"
- line 426, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 631, "else"
- line 426, "pan.___", state 634, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 424, "pan.___", state 640, "((i<1))"
- line 424, "pan.___", state 640, "((i>=1))"
- line 431, "pan.___", state 647, "(1)"
- line 431, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 648, "else"
- line 431, "pan.___", state 651, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 435, "pan.___", state 660, "(1)"
- line 435, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 661, "else"
- line 435, "pan.___", state 664, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 433, "pan.___", state 670, "((i<2))"
- line 433, "pan.___", state 670, "((i>=2))"
- line 443, "pan.___", state 674, "(1)"
- line 443, "pan.___", state 674, "(1)"
- line 614, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 614, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 614, "pan.___", state 679, "(1)"
- line 404, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 751, "(1)"
- line 431, "pan.___", state 781, "(1)"
- line 435, "pan.___", state 794, "(1)"
- line 404, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 886, "(1)"
- line 431, "pan.___", state 916, "(1)"
- line 435, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1015, "(1)"
- line 431, "pan.___", state 1045, "(1)"
- line 435, "pan.___", state 1058, "(1)"
- line 245, "pan.___", state 1091, "(1)"
- line 253, "pan.___", state 1111, "(1)"
- line 257, "pan.___", state 1119, "(1)"
- line 748, "pan.___", state 1136, "-end-"
- (92 of 1136 states)
-unreached in proctype urcu_writer
- line 837, "pan.___", state 12, "((i<1))"
- line 837, "pan.___", state 12, "((i>=1))"
- line 404, "pan.___", state 46, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 60, "cache_dirty_urcu_active_readers = 0"
- line 422, "pan.___", state 111, "(1)"
- line 426, "pan.___", state 124, "(1)"
- line 268, "pan.___", state 177, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 179, "(1)"
- line 272, "pan.___", state 186, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 188, "(1)"
- line 272, "pan.___", state 189, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 189, "else"
- line 270, "pan.___", state 194, "((i<1))"
- line 270, "pan.___", state 194, "((i>=1))"
- line 276, "pan.___", state 199, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 201, "(1)"
- line 276, "pan.___", state 202, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 202, "else"
- line 280, "pan.___", state 208, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 210, "(1)"
- line 280, "pan.___", state 211, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 211, "else"
- line 285, "pan.___", state 220, "(cache_dirty_urcu_gp_ctr)"
- line 285, "pan.___", state 220, "else"
- line 404, "pan.___", state 239, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 253, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 271, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 285, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 304, "(1)"
- line 426, "pan.___", state 317, "(1)"
- line 431, "pan.___", state 334, "(1)"
- line 435, "pan.___", state 347, "(1)"
- line 408, "pan.___", state 384, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 402, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 416, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 448, "(1)"
- line 431, "pan.___", state 465, "(1)"
- line 435, "pan.___", state 478, "(1)"
- line 408, "pan.___", state 523, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 541, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 555, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 587, "(1)"
- line 431, "pan.___", state 604, "(1)"
- line 435, "pan.___", state 617, "(1)"
- line 408, "pan.___", state 652, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 670, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 684, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 716, "(1)"
- line 431, "pan.___", state 733, "(1)"
- line 435, "pan.___", state 746, "(1)"
- line 408, "pan.___", state 783, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 801, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 815, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 847, "(1)"
- line 431, "pan.___", state 864, "(1)"
- line 435, "pan.___", state 877, "(1)"
- line 268, "pan.___", state 932, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 941, "cache_dirty_urcu_active_readers = 0"
- line 245, "pan.___", state 979, "(1)"
- line 249, "pan.___", state 987, "(1)"
- line 253, "pan.___", state 999, "(1)"
- line 257, "pan.___", state 1007, "(1)"
- line 268, "pan.___", state 1038, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1047, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1060, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1069, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1085, "(1)"
- line 249, "pan.___", state 1093, "(1)"
- line 253, "pan.___", state 1105, "(1)"
- line 257, "pan.___", state 1113, "(1)"
- line 272, "pan.___", state 1139, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1152, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1161, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1177, "(1)"
- line 249, "pan.___", state 1185, "(1)"
- line 253, "pan.___", state 1197, "(1)"
- line 257, "pan.___", state 1205, "(1)"
- line 268, "pan.___", state 1236, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1245, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1258, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1267, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1283, "(1)"
- line 249, "pan.___", state 1291, "(1)"
- line 253, "pan.___", state 1303, "(1)"
- line 257, "pan.___", state 1311, "(1)"
- line 272, "pan.___", state 1337, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1350, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1359, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1375, "(1)"
- line 249, "pan.___", state 1383, "(1)"
- line 253, "pan.___", state 1395, "(1)"
- line 257, "pan.___", state 1403, "(1)"
- line 268, "pan.___", state 1434, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1443, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1456, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1465, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1481, "(1)"
- line 249, "pan.___", state 1489, "(1)"
- line 253, "pan.___", state 1501, "(1)"
- line 257, "pan.___", state 1509, "(1)"
- line 272, "pan.___", state 1535, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1548, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1557, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1573, "(1)"
- line 249, "pan.___", state 1581, "(1)"
- line 253, "pan.___", state 1593, "(1)"
- line 257, "pan.___", state 1601, "(1)"
- line 268, "pan.___", state 1632, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1641, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1654, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1663, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1679, "(1)"
- line 249, "pan.___", state 1687, "(1)"
- line 253, "pan.___", state 1699, "(1)"
- line 257, "pan.___", state 1707, "(1)"
- line 1123, "pan.___", state 1723, "-end-"
- (110 of 1723 states)
-unreached in proctype :init:
- line 1138, "pan.___", state 11, "((i<1))"
- line 1138, "pan.___", state 11, "((i>=1))"
- (1 of 26 states)
-unreached in proctype :never:
- line 1184, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.31e+03 seconds
-pan: rate 2245.8255 states/second
-pan: avg transition delay 1.6631e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define NO_WMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2887
-2:2:1136
-3:2:1141
-4:2:1145
-5:2:1153
-6:2:1157
-7:2:1161
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-1152:1:42
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-1166:1:306
-1167:1:307
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-1176:1:333
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-1179:1:339
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-1181:1:352
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-1303:1:145
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-1309:1:1087
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-1314:1:1114
-1315:1:1115
-1316:1:1114
-1317:1:1115
-1318:1:1122
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-1321:2:2068
-1322:2:2069
-1323:2:2073
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-1326:2:2082
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-1328:2:2095
-1329:2:2099
-1330:2:2100
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-1340:2:2139
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-1342:2:2139
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-1346:2:2155
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-1348:2:2156
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-1350:2:2157
-1351:0:2887
-1352:2:2158
-1353:0:2887
-1354:1:812
-1355:1:813
-1356:0:2885
-1357:2:2159
-1358:0:2891
-1359:1:919
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1179)
-Depth= 4014 States= 1e+06 Transitions= 1.62e+08 Memory= 512.736 t= 256 R= 4e+03
-pan: claim violated! (at depth 1235)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 4014, errors: 1
- 1411681 states, stored
-2.3165948e+08 states, matched
-2.3307116e+08 transitions (= stored+matched)
-1.3076596e+09 atomic steps
-hash conflicts: 78416855 (resolved)
-
-Stats on memory usage (in Megabytes):
- 156.169 equivalent memory usage for states (stored*(State-vector + overhead))
- 66.078 actual memory usage for states (compression: 42.31%)
- state-vector as stored = 13 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 531.779 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 14645 1835 1567 2 2 ]
-unreached in proctype urcu_reader
- line 713, "pan.___", state 12, "((i<1))"
- line 713, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 102, "(1)"
- line 249, "pan.___", state 110, "(1)"
- line 253, "pan.___", state 122, "(1)"
- line 257, "pan.___", state 130, "(1)"
- line 404, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 221, "(1)"
- line 431, "pan.___", state 251, "(1)"
- line 435, "pan.___", state 264, "(1)"
- line 614, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 404, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 357, "(1)"
- line 431, "pan.___", state 387, "(1)"
- line 435, "pan.___", state 400, "(1)"
- line 404, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 486, "(1)"
- line 431, "pan.___", state 516, "(1)"
- line 435, "pan.___", state 529, "(1)"
- line 404, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 554, "(1)"
- line 404, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 555, "else"
- line 404, "pan.___", state 558, "(1)"
- line 408, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 568, "(1)"
- line 408, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 569, "else"
- line 408, "pan.___", state 572, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 406, "pan.___", state 578, "((i<1))"
- line 406, "pan.___", state 578, "((i>=1))"
- line 413, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 586, "(1)"
- line 413, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 587, "else"
- line 413, "pan.___", state 590, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 417, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 600, "(1)"
- line 417, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 601, "else"
- line 417, "pan.___", state 604, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 415, "pan.___", state 610, "((i<2))"
- line 415, "pan.___", state 610, "((i>=2))"
- line 422, "pan.___", state 617, "(1)"
- line 422, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 618, "else"
- line 422, "pan.___", state 621, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 426, "pan.___", state 630, "(1)"
- line 426, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 631, "else"
- line 426, "pan.___", state 634, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 424, "pan.___", state 640, "((i<1))"
- line 424, "pan.___", state 640, "((i>=1))"
- line 431, "pan.___", state 647, "(1)"
- line 431, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 648, "else"
- line 431, "pan.___", state 651, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 435, "pan.___", state 660, "(1)"
- line 435, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 661, "else"
- line 435, "pan.___", state 664, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 433, "pan.___", state 670, "((i<2))"
- line 433, "pan.___", state 670, "((i>=2))"
- line 443, "pan.___", state 674, "(1)"
- line 443, "pan.___", state 674, "(1)"
- line 614, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 614, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 614, "pan.___", state 679, "(1)"
- line 404, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 751, "(1)"
- line 431, "pan.___", state 781, "(1)"
- line 435, "pan.___", state 794, "(1)"
- line 404, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 886, "(1)"
- line 431, "pan.___", state 916, "(1)"
- line 435, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1015, "(1)"
- line 431, "pan.___", state 1045, "(1)"
- line 435, "pan.___", state 1058, "(1)"
- line 245, "pan.___", state 1091, "(1)"
- line 253, "pan.___", state 1111, "(1)"
- line 257, "pan.___", state 1119, "(1)"
- line 748, "pan.___", state 1136, "-end-"
- (92 of 1136 states)
-unreached in proctype urcu_writer
- line 837, "pan.___", state 12, "((i<1))"
- line 837, "pan.___", state 12, "((i>=1))"
- line 404, "pan.___", state 49, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 63, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 81, "cache_dirty_rcu_ptr = 0"
- line 422, "pan.___", state 114, "(1)"
- line 426, "pan.___", state 127, "(1)"
- line 431, "pan.___", state 144, "(1)"
- line 268, "pan.___", state 180, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 189, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 202, "cache_dirty_rcu_ptr = 0"
- line 404, "pan.___", state 242, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 256, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 274, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 288, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 307, "(1)"
- line 426, "pan.___", state 320, "(1)"
- line 431, "pan.___", state 337, "(1)"
- line 435, "pan.___", state 350, "(1)"
- line 408, "pan.___", state 387, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 405, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 419, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 451, "(1)"
- line 431, "pan.___", state 468, "(1)"
- line 435, "pan.___", state 481, "(1)"
- line 404, "pan.___", state 511, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 525, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 543, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 557, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 576, "(1)"
- line 426, "pan.___", state 589, "(1)"
- line 431, "pan.___", state 606, "(1)"
- line 435, "pan.___", state 619, "(1)"
- line 404, "pan.___", state 640, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 642, "(1)"
- line 404, "pan.___", state 643, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 643, "else"
- line 404, "pan.___", state 646, "(1)"
- line 408, "pan.___", state 654, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 656, "(1)"
- line 408, "pan.___", state 657, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 657, "else"
- line 408, "pan.___", state 660, "(1)"
- line 408, "pan.___", state 661, "(1)"
- line 408, "pan.___", state 661, "(1)"
- line 406, "pan.___", state 666, "((i<1))"
- line 406, "pan.___", state 666, "((i>=1))"
- line 413, "pan.___", state 672, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 674, "(1)"
- line 413, "pan.___", state 675, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 675, "else"
- line 413, "pan.___", state 678, "(1)"
- line 413, "pan.___", state 679, "(1)"
- line 413, "pan.___", state 679, "(1)"
- line 417, "pan.___", state 686, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 688, "(1)"
- line 417, "pan.___", state 689, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 689, "else"
- line 417, "pan.___", state 692, "(1)"
- line 417, "pan.___", state 693, "(1)"
- line 417, "pan.___", state 693, "(1)"
- line 415, "pan.___", state 698, "((i<2))"
- line 415, "pan.___", state 698, "((i>=2))"
- line 422, "pan.___", state 705, "(1)"
- line 422, "pan.___", state 706, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 706, "else"
- line 422, "pan.___", state 709, "(1)"
- line 422, "pan.___", state 710, "(1)"
- line 422, "pan.___", state 710, "(1)"
- line 426, "pan.___", state 718, "(1)"
- line 426, "pan.___", state 719, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 719, "else"
- line 426, "pan.___", state 722, "(1)"
- line 426, "pan.___", state 723, "(1)"
- line 426, "pan.___", state 723, "(1)"
- line 424, "pan.___", state 728, "((i<1))"
- line 424, "pan.___", state 728, "((i>=1))"
- line 431, "pan.___", state 735, "(1)"
- line 431, "pan.___", state 736, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 736, "else"
- line 431, "pan.___", state 739, "(1)"
- line 431, "pan.___", state 740, "(1)"
- line 431, "pan.___", state 740, "(1)"
- line 435, "pan.___", state 748, "(1)"
- line 435, "pan.___", state 749, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 749, "else"
- line 435, "pan.___", state 752, "(1)"
- line 435, "pan.___", state 753, "(1)"
- line 435, "pan.___", state 753, "(1)"
- line 433, "pan.___", state 758, "((i<2))"
- line 433, "pan.___", state 758, "((i>=2))"
- line 443, "pan.___", state 762, "(1)"
- line 443, "pan.___", state 762, "(1)"
- line 1003, "pan.___", state 766, "_proc_urcu_writer = (_proc_urcu_writer|(1<<10))"
- line 404, "pan.___", state 771, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 773, "(1)"
- line 404, "pan.___", state 774, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 774, "else"
- line 404, "pan.___", state 777, "(1)"
- line 408, "pan.___", state 785, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 787, "(1)"
- line 408, "pan.___", state 788, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 788, "else"
- line 408, "pan.___", state 791, "(1)"
- line 408, "pan.___", state 792, "(1)"
- line 408, "pan.___", state 792, "(1)"
- line 406, "pan.___", state 797, "((i<1))"
- line 406, "pan.___", state 797, "((i>=1))"
- line 413, "pan.___", state 803, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 805, "(1)"
- line 413, "pan.___", state 806, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 806, "else"
- line 413, "pan.___", state 809, "(1)"
- line 413, "pan.___", state 810, "(1)"
- line 413, "pan.___", state 810, "(1)"
- line 417, "pan.___", state 817, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 819, "(1)"
- line 417, "pan.___", state 820, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 820, "else"
- line 417, "pan.___", state 823, "(1)"
- line 417, "pan.___", state 824, "(1)"
- line 417, "pan.___", state 824, "(1)"
- line 415, "pan.___", state 829, "((i<2))"
- line 415, "pan.___", state 829, "((i>=2))"
- line 422, "pan.___", state 836, "(1)"
- line 422, "pan.___", state 837, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 837, "else"
- line 422, "pan.___", state 840, "(1)"
- line 422, "pan.___", state 841, "(1)"
- line 422, "pan.___", state 841, "(1)"
- line 426, "pan.___", state 849, "(1)"
- line 426, "pan.___", state 850, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 850, "else"
- line 426, "pan.___", state 853, "(1)"
- line 426, "pan.___", state 854, "(1)"
- line 426, "pan.___", state 854, "(1)"
- line 424, "pan.___", state 859, "((i<1))"
- line 424, "pan.___", state 859, "((i>=1))"
- line 431, "pan.___", state 866, "(1)"
- line 431, "pan.___", state 867, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 867, "else"
- line 431, "pan.___", state 870, "(1)"
- line 431, "pan.___", state 871, "(1)"
- line 431, "pan.___", state 871, "(1)"
- line 435, "pan.___", state 879, "(1)"
- line 435, "pan.___", state 880, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 880, "else"
- line 435, "pan.___", state 883, "(1)"
- line 435, "pan.___", state 884, "(1)"
- line 435, "pan.___", state 884, "(1)"
- line 433, "pan.___", state 889, "((i<2))"
- line 433, "pan.___", state 889, "((i>=2))"
- line 443, "pan.___", state 893, "(1)"
- line 443, "pan.___", state 893, "(1)"
- line 1019, "pan.___", state 898, "_proc_urcu_writer = (_proc_urcu_writer|(1<<11))"
- line 1014, "pan.___", state 899, "(((tmp2&((1<<7)-1))&&((tmp2^0)&(1<<7))))"
- line 1014, "pan.___", state 899, "else"
- line 1039, "pan.___", state 903, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<12)|(1<<11))))"
- line 268, "pan.___", state 934, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 943, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 958, "(1)"
- line 280, "pan.___", state 965, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 981, "(1)"
- line 249, "pan.___", state 989, "(1)"
- line 253, "pan.___", state 1001, "(1)"
- line 257, "pan.___", state 1009, "(1)"
- line 268, "pan.___", state 1040, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1049, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1062, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1071, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1087, "(1)"
- line 249, "pan.___", state 1095, "(1)"
- line 253, "pan.___", state 1107, "(1)"
- line 257, "pan.___", state 1115, "(1)"
- line 272, "pan.___", state 1141, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1154, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1163, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1179, "(1)"
- line 249, "pan.___", state 1187, "(1)"
- line 253, "pan.___", state 1199, "(1)"
- line 257, "pan.___", state 1207, "(1)"
- line 268, "pan.___", state 1238, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1247, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1260, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1269, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1285, "(1)"
- line 249, "pan.___", state 1293, "(1)"
- line 253, "pan.___", state 1305, "(1)"
- line 257, "pan.___", state 1313, "(1)"
- line 268, "pan.___", state 1330, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1332, "(1)"
- line 272, "pan.___", state 1339, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1341, "(1)"
- line 272, "pan.___", state 1342, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1342, "else"
- line 270, "pan.___", state 1347, "((i<1))"
- line 270, "pan.___", state 1347, "((i>=1))"
- line 276, "pan.___", state 1352, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1354, "(1)"
- line 276, "pan.___", state 1355, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1355, "else"
- line 280, "pan.___", state 1361, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1363, "(1)"
- line 280, "pan.___", state 1364, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1364, "else"
- line 278, "pan.___", state 1369, "((i<2))"
- line 278, "pan.___", state 1369, "((i>=2))"
- line 245, "pan.___", state 1377, "(1)"
- line 249, "pan.___", state 1385, "(1)"
- line 249, "pan.___", state 1386, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1386, "else"
- line 247, "pan.___", state 1391, "((i<1))"
- line 247, "pan.___", state 1391, "((i>=1))"
- line 253, "pan.___", state 1397, "(1)"
- line 253, "pan.___", state 1398, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1398, "else"
- line 257, "pan.___", state 1405, "(1)"
- line 257, "pan.___", state 1406, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1406, "else"
- line 262, "pan.___", state 1415, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1415, "else"
- line 1115, "pan.___", state 1418, "i = 0"
- line 1115, "pan.___", state 1420, "reader_barrier = 1"
- line 1115, "pan.___", state 1431, "((i<1))"
- line 1115, "pan.___", state 1431, "((i>=1))"
- line 268, "pan.___", state 1436, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1438, "(1)"
- line 272, "pan.___", state 1445, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1447, "(1)"
- line 272, "pan.___", state 1448, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1448, "else"
- line 270, "pan.___", state 1453, "((i<1))"
- line 270, "pan.___", state 1453, "((i>=1))"
- line 276, "pan.___", state 1458, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1460, "(1)"
- line 276, "pan.___", state 1461, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1461, "else"
- line 280, "pan.___", state 1467, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1469, "(1)"
- line 280, "pan.___", state 1470, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1470, "else"
- line 278, "pan.___", state 1475, "((i<2))"
- line 278, "pan.___", state 1475, "((i>=2))"
- line 245, "pan.___", state 1483, "(1)"
- line 249, "pan.___", state 1491, "(1)"
- line 249, "pan.___", state 1492, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1492, "else"
- line 247, "pan.___", state 1497, "((i<1))"
- line 247, "pan.___", state 1497, "((i>=1))"
- line 253, "pan.___", state 1503, "(1)"
- line 253, "pan.___", state 1504, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1504, "else"
- line 257, "pan.___", state 1511, "(1)"
- line 257, "pan.___", state 1512, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1512, "else"
- line 262, "pan.___", state 1521, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1521, "else"
- line 295, "pan.___", state 1523, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1523, "else"
- line 1115, "pan.___", state 1524, "(cache_dirty_urcu_gp_ctr)"
- line 1115, "pan.___", state 1524, "else"
- line 272, "pan.___", state 1537, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1550, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1559, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1575, "(1)"
- line 249, "pan.___", state 1583, "(1)"
- line 253, "pan.___", state 1595, "(1)"
- line 257, "pan.___", state 1603, "(1)"
- line 268, "pan.___", state 1634, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1643, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1656, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1665, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1681, "(1)"
- line 249, "pan.___", state 1689, "(1)"
- line 253, "pan.___", state 1701, "(1)"
- line 257, "pan.___", state 1709, "(1)"
- line 1123, "pan.___", state 1725, "-end-"
- (212 of 1725 states)
-unreached in proctype :init:
- line 1138, "pan.___", state 11, "((i<1))"
- line 1138, "pan.___", state 11, "((i>=1))"
- (1 of 26 states)
-unreached in proctype :never:
- line 1184, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 372 seconds
-pan: rate 3796.6785 states/second
-pan: avg transition delay 1.5953e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define SINGLE_FLIP
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-10:1:5
-11:1:9
-12:1:17
-13:1:21
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-518:1:69
-519:1:77
-520:1:78
-521:1:82
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-523:1:87
-524:1:82
-525:1:86
-526:1:87
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-528:1:98
-529:1:105
-530:1:106
-531:1:113
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-569:2:2833
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-571:2:2841
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+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1179)
-depth 7: Claim reached state 9 (line 1184)
-depth 136: Claim reached state 9 (line 1183)
-Depth= 12986 States= 1e+06 Transitions= 1.85e+08 Memory= 494.963 t= 294 R= 3e+03
-Depth= 12986 States= 2e+06 Transitions= 6.44e+08 Memory= 520.744 t= 1.06e+03 R= 2e+03
-Depth= 12986 States= 3e+06 Transitions= 1.24e+09 Memory= 545.842 t= 2.08e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 12986 States= 4e+06 Transitions= 1.65e+09 Memory= 602.940 t= 2.76e+03 R= 1e+03
-Depth= 12986 States= 5e+06 Transitions= 2e+09 Memory= 629.111 t= 3.34e+03 R= 1e+03
-Depth= 12986 States= 6e+06 Transitions= 2.47e+09 Memory= 655.283 t= 4.12e+03 R= 1e+03
-Depth= 12986 States= 7e+06 Transitions= 2.94e+09 Memory= 681.260 t= 4.93e+03 R= 1e+03
-Depth= 12986 States= 8e+06 Transitions= 3.45e+09 Memory= 705.967 t= 5.79e+03 R= 1e+03
-Depth= 12986 States= 9e+06 Transitions= 3.84e+09 Memory= 732.529 t= 6.46e+03 R= 1e+03
-pan: resizing hashtable to -w24.. done
-Depth= 12986 States= 1e+07 Transitions= 4.23e+09 Memory= 882.404 t= 7.1e+03 R= 1e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 12986, errors: 0
- 5822478 states, stored (1.02932e+07 visited)
-4.3658924e+09 states, matched
-4.3761856e+09 transitions (= visited+matched)
-2.5547511e+10 atomic steps
-hash conflicts: 1.1937107e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 644.119 equivalent memory usage for states (stored*(State-vector + overhead))
- 303.976 actual memory usage for states (compression: 47.19%)
- state-vector as stored = 19 byte + 36 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 889.631 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 28603 2179 2102 2 2 ]
-unreached in proctype urcu_reader
- line 268, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 102, "(1)"
- line 249, "pan.___", state 110, "(1)"
- line 253, "pan.___", state 122, "(1)"
- line 257, "pan.___", state 130, "(1)"
- line 404, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 221, "(1)"
- line 431, "pan.___", state 251, "(1)"
- line 435, "pan.___", state 264, "(1)"
- line 614, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 404, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 357, "(1)"
- line 431, "pan.___", state 387, "(1)"
- line 435, "pan.___", state 400, "(1)"
- line 404, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 486, "(1)"
- line 431, "pan.___", state 516, "(1)"
- line 435, "pan.___", state 529, "(1)"
- line 404, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 554, "(1)"
- line 404, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 555, "else"
- line 404, "pan.___", state 558, "(1)"
- line 408, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 568, "(1)"
- line 408, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 569, "else"
- line 408, "pan.___", state 572, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 406, "pan.___", state 578, "((i<1))"
- line 406, "pan.___", state 578, "((i>=1))"
- line 413, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 586, "(1)"
- line 413, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 587, "else"
- line 413, "pan.___", state 590, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 417, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 600, "(1)"
- line 417, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 601, "else"
- line 417, "pan.___", state 604, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 415, "pan.___", state 610, "((i<2))"
- line 415, "pan.___", state 610, "((i>=2))"
- line 422, "pan.___", state 617, "(1)"
- line 422, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 618, "else"
- line 422, "pan.___", state 621, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 426, "pan.___", state 630, "(1)"
- line 426, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 631, "else"
- line 426, "pan.___", state 634, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 424, "pan.___", state 640, "((i<1))"
- line 424, "pan.___", state 640, "((i>=1))"
- line 431, "pan.___", state 647, "(1)"
- line 431, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 648, "else"
- line 431, "pan.___", state 651, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 435, "pan.___", state 660, "(1)"
- line 435, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 661, "else"
- line 435, "pan.___", state 664, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 433, "pan.___", state 670, "((i<2))"
- line 433, "pan.___", state 670, "((i>=2))"
- line 443, "pan.___", state 674, "(1)"
- line 443, "pan.___", state 674, "(1)"
- line 614, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 614, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 614, "pan.___", state 679, "(1)"
- line 404, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 751, "(1)"
- line 431, "pan.___", state 781, "(1)"
- line 435, "pan.___", state 794, "(1)"
- line 404, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 886, "(1)"
- line 431, "pan.___", state 916, "(1)"
- line 435, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1015, "(1)"
- line 431, "pan.___", state 1045, "(1)"
- line 435, "pan.___", state 1058, "(1)"
- line 245, "pan.___", state 1091, "(1)"
- line 253, "pan.___", state 1111, "(1)"
- line 257, "pan.___", state 1119, "(1)"
- line 748, "pan.___", state 1136, "-end-"
- (91 of 1136 states)
-unreached in proctype urcu_writer
- line 404, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 422, "pan.___", state 110, "(1)"
- line 426, "pan.___", state 123, "(1)"
- line 431, "pan.___", state 140, "(1)"
- line 268, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 404, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 303, "(1)"
- line 426, "pan.___", state 316, "(1)"
- line 431, "pan.___", state 333, "(1)"
- line 435, "pan.___", state 346, "(1)"
- line 408, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 447, "(1)"
- line 431, "pan.___", state 464, "(1)"
- line 435, "pan.___", state 477, "(1)"
- line 408, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 586, "(1)"
- line 431, "pan.___", state 603, "(1)"
- line 435, "pan.___", state 616, "(1)"
- line 408, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 715, "(1)"
- line 431, "pan.___", state 732, "(1)"
- line 435, "pan.___", state 745, "(1)"
- line 408, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 846, "(1)"
- line 431, "pan.___", state 863, "(1)"
- line 435, "pan.___", state 876, "(1)"
- line 268, "pan.___", state 926, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 935, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 948, "cache_dirty_rcu_ptr = 0"
- line 245, "pan.___", state 973, "(1)"
- line 249, "pan.___", state 981, "(1)"
- line 253, "pan.___", state 993, "(1)"
- line 257, "pan.___", state 1001, "(1)"
- line 268, "pan.___", state 1032, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1041, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1054, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1063, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1079, "(1)"
- line 249, "pan.___", state 1087, "(1)"
- line 253, "pan.___", state 1099, "(1)"
- line 257, "pan.___", state 1107, "(1)"
- line 268, "pan.___", state 1128, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1137, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1152, "(1)"
- line 280, "pan.___", state 1159, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1175, "(1)"
- line 249, "pan.___", state 1183, "(1)"
- line 253, "pan.___", state 1195, "(1)"
- line 257, "pan.___", state 1203, "(1)"
- line 268, "pan.___", state 1234, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1243, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1256, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1265, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1281, "(1)"
- line 249, "pan.___", state 1289, "(1)"
- line 253, "pan.___", state 1301, "(1)"
- line 257, "pan.___", state 1309, "(1)"
- line 272, "pan.___", state 1335, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1348, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1357, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1373, "(1)"
- line 249, "pan.___", state 1381, "(1)"
- line 253, "pan.___", state 1393, "(1)"
- line 257, "pan.___", state 1401, "(1)"
- line 268, "pan.___", state 1432, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1441, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1454, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1463, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1479, "(1)"
- line 249, "pan.___", state 1487, "(1)"
- line 253, "pan.___", state 1499, "(1)"
- line 257, "pan.___", state 1507, "(1)"
- line 272, "pan.___", state 1533, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1546, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1555, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1571, "(1)"
- line 249, "pan.___", state 1579, "(1)"
- line 253, "pan.___", state 1591, "(1)"
- line 257, "pan.___", state 1599, "(1)"
- line 268, "pan.___", state 1630, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1639, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1652, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1661, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1677, "(1)"
- line 249, "pan.___", state 1685, "(1)"
- line 253, "pan.___", state 1697, "(1)"
- line 257, "pan.___", state 1705, "(1)"
- line 272, "pan.___", state 1731, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1744, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1753, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1769, "(1)"
- line 249, "pan.___", state 1777, "(1)"
- line 253, "pan.___", state 1789, "(1)"
- line 257, "pan.___", state 1797, "(1)"
- line 268, "pan.___", state 1828, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1837, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1850, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1859, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1875, "(1)"
- line 249, "pan.___", state 1883, "(1)"
- line 253, "pan.___", state 1895, "(1)"
- line 257, "pan.___", state 1903, "(1)"
- line 1123, "pan.___", state 1919, "-end-"
- (118 of 1919 states)
-unreached in proctype :init:
- (0 of 26 states)
-unreached in proctype :never:
- line 1186, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 7.33e+03 seconds
-pan: rate 1403.7352 states/second
-pan: avg transition delay 1.6756e-06 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define READER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1179)
-depth 7: Claim reached state 9 (line 1184)
-depth 46: Claim reached state 9 (line 1183)
-Depth= 3817 States= 1e+06 Transitions= 2.94e+08 Memory= 492.912 t= 480 R= 2e+03
-Depth= 3900 States= 2e+06 Transitions= 6.63e+08 Memory= 519.572 t= 1.09e+03 R= 2e+03
-Depth= 3900 States= 3e+06 Transitions= 1.33e+09 Memory= 543.986 t= 2.23e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 3900 States= 4e+06 Transitions= 1.71e+09 Memory= 601.279 t= 2.86e+03 R= 1e+03
-Depth= 3900 States= 5e+06 Transitions= 2.06e+09 Memory= 627.647 t= 3.45e+03 R= 1e+03
-Depth= 3900 States= 6e+06 Transitions= 2.49e+09 Memory= 653.818 t= 4.18e+03 R= 1e+03
-Depth= 3900 States= 7e+06 Transitions= 3.14e+09 Memory= 678.135 t= 5.28e+03 R= 1e+03
-Depth= 3900 States= 8e+06 Transitions= 3.52e+09 Memory= 704.404 t= 5.93e+03 R= 1e+03
-Depth= 3900 States= 9e+06 Transitions= 3.88e+09 Memory= 730.869 t= 6.53e+03 R= 1e+03
-pan: resizing hashtable to -w24.. done
-Depth= 3900 States= 1e+07 Transitions= 4.34e+09 Memory= 880.451 t= 7.29e+03 R= 1e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 3900, errors: 0
- 5638524 states, stored (1.00251e+07 visited)
-4.3347674e+09 states, matched
-4.3447924e+09 transitions (= visited+matched)
-2.5387604e+10 atomic steps
-hash conflicts: 1.1627355e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 623.769 equivalent memory usage for states (stored*(State-vector + overhead))
- 295.411 actual memory usage for states (compression: 47.36%)
- state-vector as stored = 19 byte + 36 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 881.037 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 26786 2128 1995 2 2 ]
-unreached in proctype urcu_reader
- line 268, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 102, "(1)"
- line 249, "pan.___", state 110, "(1)"
- line 253, "pan.___", state 122, "(1)"
- line 257, "pan.___", state 130, "(1)"
- line 404, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 221, "(1)"
- line 431, "pan.___", state 251, "(1)"
- line 435, "pan.___", state 264, "(1)"
- line 614, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 404, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 357, "(1)"
- line 431, "pan.___", state 387, "(1)"
- line 435, "pan.___", state 400, "(1)"
- line 404, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 486, "(1)"
- line 431, "pan.___", state 516, "(1)"
- line 435, "pan.___", state 529, "(1)"
- line 404, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 404, "pan.___", state 554, "(1)"
- line 404, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 404, "pan.___", state 555, "else"
- line 404, "pan.___", state 558, "(1)"
- line 408, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 408, "pan.___", state 568, "(1)"
- line 408, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 408, "pan.___", state 569, "else"
- line 408, "pan.___", state 572, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 408, "pan.___", state 573, "(1)"
- line 406, "pan.___", state 578, "((i<1))"
- line 406, "pan.___", state 578, "((i>=1))"
- line 413, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 413, "pan.___", state 586, "(1)"
- line 413, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 413, "pan.___", state 587, "else"
- line 413, "pan.___", state 590, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 413, "pan.___", state 591, "(1)"
- line 417, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 417, "pan.___", state 600, "(1)"
- line 417, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 417, "pan.___", state 601, "else"
- line 417, "pan.___", state 604, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 417, "pan.___", state 605, "(1)"
- line 415, "pan.___", state 610, "((i<2))"
- line 415, "pan.___", state 610, "((i>=2))"
- line 422, "pan.___", state 617, "(1)"
- line 422, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 422, "pan.___", state 618, "else"
- line 422, "pan.___", state 621, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 422, "pan.___", state 622, "(1)"
- line 426, "pan.___", state 630, "(1)"
- line 426, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 426, "pan.___", state 631, "else"
- line 426, "pan.___", state 634, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 426, "pan.___", state 635, "(1)"
- line 424, "pan.___", state 640, "((i<1))"
- line 424, "pan.___", state 640, "((i>=1))"
- line 431, "pan.___", state 647, "(1)"
- line 431, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 431, "pan.___", state 648, "else"
- line 431, "pan.___", state 651, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 431, "pan.___", state 652, "(1)"
- line 435, "pan.___", state 660, "(1)"
- line 435, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 435, "pan.___", state 661, "else"
- line 435, "pan.___", state 664, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 435, "pan.___", state 665, "(1)"
- line 433, "pan.___", state 670, "((i<2))"
- line 433, "pan.___", state 670, "((i>=2))"
- line 443, "pan.___", state 674, "(1)"
- line 443, "pan.___", state 674, "(1)"
- line 614, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 614, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 614, "pan.___", state 679, "(1)"
- line 404, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 751, "(1)"
- line 431, "pan.___", state 781, "(1)"
- line 435, "pan.___", state 794, "(1)"
- line 404, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 886, "(1)"
- line 431, "pan.___", state 916, "(1)"
- line 435, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 413, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 1015, "(1)"
- line 431, "pan.___", state 1045, "(1)"
- line 435, "pan.___", state 1058, "(1)"
- line 245, "pan.___", state 1091, "(1)"
- line 253, "pan.___", state 1111, "(1)"
- line 257, "pan.___", state 1119, "(1)"
- line 748, "pan.___", state 1136, "-end-"
- (91 of 1136 states)
-unreached in proctype urcu_writer
- line 404, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 422, "pan.___", state 110, "(1)"
- line 426, "pan.___", state 123, "(1)"
- line 431, "pan.___", state 140, "(1)"
- line 268, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 404, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 422, "pan.___", state 303, "(1)"
- line 426, "pan.___", state 316, "(1)"
- line 431, "pan.___", state 333, "(1)"
- line 435, "pan.___", state 346, "(1)"
- line 408, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 447, "(1)"
- line 431, "pan.___", state 464, "(1)"
- line 435, "pan.___", state 477, "(1)"
- line 408, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 586, "(1)"
- line 431, "pan.___", state 603, "(1)"
- line 435, "pan.___", state 616, "(1)"
- line 408, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 715, "(1)"
- line 431, "pan.___", state 732, "(1)"
- line 435, "pan.___", state 745, "(1)"
- line 408, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 413, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 426, "pan.___", state 846, "(1)"
- line 431, "pan.___", state 863, "(1)"
- line 435, "pan.___", state 876, "(1)"
- line 268, "pan.___", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 940, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 955, "(1)"
- line 280, "pan.___", state 962, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 978, "(1)"
- line 249, "pan.___", state 986, "(1)"
- line 253, "pan.___", state 998, "(1)"
- line 257, "pan.___", state 1006, "(1)"
- line 268, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1059, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1084, "(1)"
- line 249, "pan.___", state 1092, "(1)"
- line 253, "pan.___", state 1104, "(1)"
- line 257, "pan.___", state 1112, "(1)"
- line 272, "pan.___", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1151, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1176, "(1)"
- line 249, "pan.___", state 1184, "(1)"
- line 253, "pan.___", state 1196, "(1)"
- line 257, "pan.___", state 1204, "(1)"
- line 268, "pan.___", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1257, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1282, "(1)"
- line 249, "pan.___", state 1290, "(1)"
- line 253, "pan.___", state 1302, "(1)"
- line 257, "pan.___", state 1310, "(1)"
- line 272, "pan.___", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1349, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1374, "(1)"
- line 249, "pan.___", state 1382, "(1)"
- line 253, "pan.___", state 1394, "(1)"
- line 257, "pan.___", state 1402, "(1)"
- line 268, "pan.___", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1455, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1480, "(1)"
- line 249, "pan.___", state 1488, "(1)"
- line 253, "pan.___", state 1500, "(1)"
- line 257, "pan.___", state 1508, "(1)"
- line 272, "pan.___", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1547, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1572, "(1)"
- line 249, "pan.___", state 1580, "(1)"
- line 253, "pan.___", state 1592, "(1)"
- line 257, "pan.___", state 1600, "(1)"
- line 268, "pan.___", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1653, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1678, "(1)"
- line 249, "pan.___", state 1686, "(1)"
- line 253, "pan.___", state 1698, "(1)"
- line 257, "pan.___", state 1706, "(1)"
- line 1123, "pan.___", state 1722, "-end-"
- (103 of 1722 states)
-unreached in proctype :init:
- (0 of 26 states)
-unreached in proctype :never:
- line 1186, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 7.3e+03 seconds
-pan: rate 1373.8126 states/second
-pan: avg transition delay 1.6795e-06 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1180)
-depth 7: Claim reached state 9 (line 1185)
-depth 46: Claim reached state 9 (line 1184)
-pan: acceptance cycle (at depth 3798)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 3956, errors: 1
- 139740 states, stored (233412 visited)
- 43234612 states, matched
- 43468024 transitions (= visited+matched)
-2.3201732e+08 atomic steps
-hash conflicts: 937081 (resolved)
-
-Stats on memory usage (in Megabytes):
- 15.459 equivalent memory usage for states (stored*(State-vector + overhead))
- 7.007 actual memory usage for states (compression: 45.33%)
- state-vector as stored = 17 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 472.697 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 1001 532 228 2 2 ]
-unreached in proctype urcu_reader
- line 269, "pan.___", state 55, "cache_dirty_urcu_gp_ctr = 0"
- line 277, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 86, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 102, "(1)"
- line 250, "pan.___", state 110, "(1)"
- line 254, "pan.___", state 122, "(1)"
- line 258, "pan.___", state 130, "(1)"
- line 405, "pan.___", state 156, "cache_dirty_urcu_gp_ctr = 0"
- line 414, "pan.___", state 188, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 202, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 221, "(1)"
- line 432, "pan.___", state 251, "(1)"
- line 436, "pan.___", state 264, "(1)"
- line 615, "pan.___", state 285, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 405, "pan.___", state 292, "cache_dirty_urcu_gp_ctr = 0"
- line 414, "pan.___", state 324, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 338, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 357, "(1)"
- line 432, "pan.___", state 387, "(1)"
- line 436, "pan.___", state 400, "(1)"
- line 405, "pan.___", state 421, "cache_dirty_urcu_gp_ctr = 0"
- line 414, "pan.___", state 453, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 467, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 486, "(1)"
- line 432, "pan.___", state 516, "(1)"
- line 436, "pan.___", state 529, "(1)"
- line 405, "pan.___", state 552, "cache_dirty_urcu_gp_ctr = 0"
- line 405, "pan.___", state 554, "(1)"
- line 405, "pan.___", state 555, "(cache_dirty_urcu_gp_ctr)"
- line 405, "pan.___", state 555, "else"
- line 405, "pan.___", state 558, "(1)"
- line 409, "pan.___", state 566, "cache_dirty_urcu_active_readers = 0"
- line 409, "pan.___", state 568, "(1)"
- line 409, "pan.___", state 569, "(cache_dirty_urcu_active_readers)"
- line 409, "pan.___", state 569, "else"
- line 409, "pan.___", state 572, "(1)"
- line 409, "pan.___", state 573, "(1)"
- line 409, "pan.___", state 573, "(1)"
- line 407, "pan.___", state 578, "((i<1))"
- line 407, "pan.___", state 578, "((i>=1))"
- line 414, "pan.___", state 584, "cache_dirty_rcu_ptr = 0"
- line 414, "pan.___", state 586, "(1)"
- line 414, "pan.___", state 587, "(cache_dirty_rcu_ptr)"
- line 414, "pan.___", state 587, "else"
- line 414, "pan.___", state 590, "(1)"
- line 414, "pan.___", state 591, "(1)"
- line 414, "pan.___", state 591, "(1)"
- line 418, "pan.___", state 598, "cache_dirty_rcu_data[i] = 0"
- line 418, "pan.___", state 600, "(1)"
- line 418, "pan.___", state 601, "(cache_dirty_rcu_data[i])"
- line 418, "pan.___", state 601, "else"
- line 418, "pan.___", state 604, "(1)"
- line 418, "pan.___", state 605, "(1)"
- line 418, "pan.___", state 605, "(1)"
- line 416, "pan.___", state 610, "((i<2))"
- line 416, "pan.___", state 610, "((i>=2))"
- line 423, "pan.___", state 617, "(1)"
- line 423, "pan.___", state 618, "(!(cache_dirty_urcu_gp_ctr))"
- line 423, "pan.___", state 618, "else"
- line 423, "pan.___", state 621, "(1)"
- line 423, "pan.___", state 622, "(1)"
- line 423, "pan.___", state 622, "(1)"
- line 427, "pan.___", state 630, "(1)"
- line 427, "pan.___", state 631, "(!(cache_dirty_urcu_active_readers))"
- line 427, "pan.___", state 631, "else"
- line 427, "pan.___", state 634, "(1)"
- line 427, "pan.___", state 635, "(1)"
- line 427, "pan.___", state 635, "(1)"
- line 425, "pan.___", state 640, "((i<1))"
- line 425, "pan.___", state 640, "((i>=1))"
- line 432, "pan.___", state 647, "(1)"
- line 432, "pan.___", state 648, "(!(cache_dirty_rcu_ptr))"
- line 432, "pan.___", state 648, "else"
- line 432, "pan.___", state 651, "(1)"
- line 432, "pan.___", state 652, "(1)"
- line 432, "pan.___", state 652, "(1)"
- line 436, "pan.___", state 660, "(1)"
- line 436, "pan.___", state 661, "(!(cache_dirty_rcu_data[i]))"
- line 436, "pan.___", state 661, "else"
- line 436, "pan.___", state 664, "(1)"
- line 436, "pan.___", state 665, "(1)"
- line 436, "pan.___", state 665, "(1)"
- line 434, "pan.___", state 670, "((i<2))"
- line 434, "pan.___", state 670, "((i>=2))"
- line 444, "pan.___", state 674, "(1)"
- line 444, "pan.___", state 674, "(1)"
- line 615, "pan.___", state 677, "cached_urcu_active_readers = (tmp+1)"
- line 615, "pan.___", state 678, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 615, "pan.___", state 679, "(1)"
- line 405, "pan.___", state 686, "cache_dirty_urcu_gp_ctr = 0"
- line 414, "pan.___", state 718, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 732, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 751, "(1)"
- line 432, "pan.___", state 781, "(1)"
- line 436, "pan.___", state 794, "(1)"
- line 405, "pan.___", state 821, "cache_dirty_urcu_gp_ctr = 0"
- line 414, "pan.___", state 853, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 867, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 886, "(1)"
- line 432, "pan.___", state 916, "(1)"
- line 436, "pan.___", state 929, "(1)"
- line 405, "pan.___", state 950, "cache_dirty_urcu_gp_ctr = 0"
- line 414, "pan.___", state 982, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 996, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 1015, "(1)"
- line 432, "pan.___", state 1045, "(1)"
- line 436, "pan.___", state 1058, "(1)"
- line 246, "pan.___", state 1091, "(1)"
- line 254, "pan.___", state 1111, "(1)"
- line 258, "pan.___", state 1119, "(1)"
- line 749, "pan.___", state 1136, "-end-"
- (91 of 1136 states)
-unreached in proctype urcu_writer
- line 405, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 409, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 423, "pan.___", state 110, "(1)"
- line 427, "pan.___", state 123, "(1)"
- line 432, "pan.___", state 140, "(1)"
- line 269, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 405, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 409, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 423, "pan.___", state 303, "(1)"
- line 427, "pan.___", state 316, "(1)"
- line 432, "pan.___", state 333, "(1)"
- line 436, "pan.___", state 346, "(1)"
- line 409, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 427, "pan.___", state 447, "(1)"
- line 432, "pan.___", state 464, "(1)"
- line 436, "pan.___", state 477, "(1)"
- line 405, "pan.___", state 504, "cache_dirty_urcu_gp_ctr = 0"
- line 405, "pan.___", state 506, "(1)"
- line 405, "pan.___", state 507, "(cache_dirty_urcu_gp_ctr)"
- line 405, "pan.___", state 507, "else"
- line 405, "pan.___", state 510, "(1)"
- line 409, "pan.___", state 518, "cache_dirty_urcu_active_readers = 0"
- line 409, "pan.___", state 520, "(1)"
- line 409, "pan.___", state 521, "(cache_dirty_urcu_active_readers)"
- line 409, "pan.___", state 521, "else"
- line 409, "pan.___", state 524, "(1)"
- line 409, "pan.___", state 525, "(1)"
- line 409, "pan.___", state 525, "(1)"
- line 407, "pan.___", state 530, "((i<1))"
- line 407, "pan.___", state 530, "((i>=1))"
- line 414, "pan.___", state 536, "cache_dirty_rcu_ptr = 0"
- line 414, "pan.___", state 538, "(1)"
- line 414, "pan.___", state 539, "(cache_dirty_rcu_ptr)"
- line 414, "pan.___", state 539, "else"
- line 414, "pan.___", state 542, "(1)"
- line 414, "pan.___", state 543, "(1)"
- line 414, "pan.___", state 543, "(1)"
- line 418, "pan.___", state 550, "cache_dirty_rcu_data[i] = 0"
- line 418, "pan.___", state 552, "(1)"
- line 418, "pan.___", state 553, "(cache_dirty_rcu_data[i])"
- line 418, "pan.___", state 553, "else"
- line 418, "pan.___", state 556, "(1)"
- line 418, "pan.___", state 557, "(1)"
- line 418, "pan.___", state 557, "(1)"
- line 416, "pan.___", state 562, "((i<2))"
- line 416, "pan.___", state 562, "((i>=2))"
- line 423, "pan.___", state 569, "(1)"
- line 423, "pan.___", state 570, "(!(cache_dirty_urcu_gp_ctr))"
- line 423, "pan.___", state 570, "else"
- line 423, "pan.___", state 573, "(1)"
- line 423, "pan.___", state 574, "(1)"
- line 423, "pan.___", state 574, "(1)"
- line 427, "pan.___", state 582, "(1)"
- line 427, "pan.___", state 583, "(!(cache_dirty_urcu_active_readers))"
- line 427, "pan.___", state 583, "else"
- line 427, "pan.___", state 586, "(1)"
- line 427, "pan.___", state 587, "(1)"
- line 427, "pan.___", state 587, "(1)"
- line 425, "pan.___", state 592, "((i<1))"
- line 425, "pan.___", state 592, "((i>=1))"
- line 432, "pan.___", state 599, "(1)"
- line 432, "pan.___", state 600, "(!(cache_dirty_rcu_ptr))"
- line 432, "pan.___", state 600, "else"
- line 432, "pan.___", state 603, "(1)"
- line 432, "pan.___", state 604, "(1)"
- line 432, "pan.___", state 604, "(1)"
- line 436, "pan.___", state 612, "(1)"
- line 436, "pan.___", state 613, "(!(cache_dirty_rcu_data[i]))"
- line 436, "pan.___", state 613, "else"
- line 436, "pan.___", state 616, "(1)"
- line 436, "pan.___", state 617, "(1)"
- line 436, "pan.___", state 617, "(1)"
- line 444, "pan.___", state 626, "(1)"
- line 444, "pan.___", state 626, "(1)"
- line 409, "pan.___", state 646, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 664, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 678, "cache_dirty_rcu_data[i] = 0"
- line 427, "pan.___", state 710, "(1)"
- line 432, "pan.___", state 727, "(1)"
- line 436, "pan.___", state 740, "(1)"
- line 409, "pan.___", state 775, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 793, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 807, "cache_dirty_rcu_data[i] = 0"
- line 427, "pan.___", state 839, "(1)"
- line 432, "pan.___", state 856, "(1)"
- line 436, "pan.___", state 869, "(1)"
- line 409, "pan.___", state 906, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 924, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 938, "cache_dirty_rcu_data[i] = 0"
- line 427, "pan.___", state 970, "(1)"
- line 432, "pan.___", state 987, "(1)"
- line 436, "pan.___", state 1000, "(1)"
- line 409, "pan.___", state 1040, "cache_dirty_urcu_active_readers = 0"
- line 414, "pan.___", state 1058, "cache_dirty_rcu_ptr = 0"
- line 418, "pan.___", state 1072, "cache_dirty_rcu_data[i] = 0"
- line 427, "pan.___", state 1104, "(1)"
- line 432, "pan.___", state 1121, "(1)"
- line 436, "pan.___", state 1134, "(1)"
- line 269, "pan.___", state 1180, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 1189, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1204, "(1)"
- line 281, "pan.___", state 1211, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1227, "(1)"
- line 250, "pan.___", state 1235, "(1)"
- line 254, "pan.___", state 1247, "(1)"
- line 258, "pan.___", state 1255, "(1)"
- line 269, "pan.___", state 1286, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 1295, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1308, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 1317, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1333, "(1)"
- line 250, "pan.___", state 1341, "(1)"
- line 254, "pan.___", state 1353, "(1)"
- line 258, "pan.___", state 1361, "(1)"
- line 273, "pan.___", state 1387, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1400, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 1409, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1425, "(1)"
- line 250, "pan.___", state 1433, "(1)"
- line 254, "pan.___", state 1445, "(1)"
- line 258, "pan.___", state 1453, "(1)"
- line 269, "pan.___", state 1484, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 1493, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1506, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 1515, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1531, "(1)"
- line 250, "pan.___", state 1539, "(1)"
- line 254, "pan.___", state 1551, "(1)"
- line 258, "pan.___", state 1559, "(1)"
- line 1124, "pan.___", state 1575, "-end-"
- (118 of 1575 states)
-unreached in proctype :init:
- (0 of 26 states)
-unreached in proctype :never:
- line 1187, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 67.7 seconds
-pan: rate 3447.2308 states/second
-pan: avg transition delay 1.5577e-06 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-min-progress'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN, READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_OUT)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE
- | READ_LOCK_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN
- | READ_UNLOCK_OUT, 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT, /* post-dominant */
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- data_read_first[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-3237:2:2176
-3238:2:2177
-3239:2:2185
-3240:2:2190
-3241:2:2194
-3242:2:2195
-3243:2:2203
-3244:2:2204
-3245:2:2208
-3246:2:2209
-3247:2:2203
-3248:2:2204
-3249:2:2208
-3250:2:2209
-3251:2:2217
-3252:2:2222
-3253:2:2223
-3254:2:2234
-3255:2:2235
-3256:2:2236
-3257:2:2247
-3258:2:2252
-3259:2:2253
-3260:2:2264
-3261:2:2265
-3262:2:2266
-3263:2:2264
-3264:2:2265
-3265:2:2266
-3266:2:2277
-3267:0:2739
-3268:2:1175
-3269:0:2739
-3270:1:38
-3271:0:2739
-3272:2:2023
-3273:2:2024
-3274:2:2028
-3275:2:2029
-3276:2:2037
-3277:2:2038
-3278:2:2042
-3279:2:2043
-3280:2:2051
-3281:2:2056
-3282:2:2060
-3283:2:2061
-3284:2:2069
-3285:2:2070
-3286:2:2074
-3287:2:2075
-3288:2:2069
-3289:2:2070
-3290:2:2074
-3291:2:2075
-3292:2:2083
-3293:2:2088
-3294:2:2089
-3295:2:2100
-3296:2:2101
-3297:2:2102
-3298:2:2113
-3299:2:2118
-3300:2:2119
-3301:2:2130
-3302:2:2131
-3303:2:2132
-3304:2:2130
-3305:2:2131
-3306:2:2132
-3307:2:2143
-3308:2:2151
-3309:0:2739
-3310:2:1175
-3311:0:2739
-3312:2:2157
-3313:2:2158
-3314:2:2162
-3315:2:2163
-3316:2:2171
-3317:2:2172
-3318:2:2176
-3319:2:2177
-3320:2:2185
-3321:2:2190
-3322:2:2194
-3323:2:2195
-3324:2:2203
-3325:2:2204
-3326:2:2208
-3327:2:2209
-3328:2:2203
-3329:2:2204
-3330:2:2208
-3331:2:2209
-3332:2:2217
-3333:2:2222
-3334:2:2223
-3335:2:2234
-3336:2:2235
-3337:2:2236
-3338:2:2247
-3339:2:2252
-3340:2:2253
-3341:2:2264
-3342:2:2265
-3343:2:2266
-3344:2:2264
-3345:2:2265
-3346:2:2266
-3347:2:2277
-3348:0:2739
-3349:1:39
-3350:0:2739
-3351:2:1175
-3352:0:2739
-3353:1:40
-3354:0:2739
-3355:1:41
-3356:0:2739
-3357:2:2023
-3358:2:2024
-3359:2:2028
-3360:2:2029
-3361:2:2037
-3362:2:2038
-3363:2:2042
-3364:2:2043
-3365:2:2051
-3366:2:2056
-3367:2:2060
-3368:2:2061
-3369:2:2069
-3370:2:2070
-3371:2:2074
-3372:2:2075
-3373:2:2069
-3374:2:2070
-3375:2:2074
-3376:2:2075
-3377:2:2083
-3378:2:2088
-3379:2:2089
-3380:2:2100
-3381:2:2101
-3382:2:2102
-3383:2:2113
-3384:2:2118
-3385:2:2119
-3386:2:2130
-3387:2:2131
-3388:2:2132
-3389:2:2130
-3390:2:2131
-3391:2:2132
-3392:2:2143
-3393:2:2151
-3394:0:2739
-3395:2:1175
-3396:0:2739
-3397:2:2157
-3398:2:2158
-3399:2:2162
-3400:2:2163
-3401:2:2171
-3402:2:2172
-3403:2:2176
-3404:2:2177
-3405:2:2185
-3406:2:2190
-3407:2:2194
-3408:2:2195
-3409:2:2203
-3410:2:2204
-3411:2:2208
-3412:2:2209
-3413:2:2203
-3414:2:2204
-3415:2:2208
-3416:2:2209
-3417:2:2217
-3418:2:2222
-3419:2:2223
-3420:2:2234
-3421:2:2235
-3422:2:2236
-3423:2:2247
-3424:2:2252
-3425:2:2253
-3426:2:2264
-3427:2:2265
-3428:2:2266
-3429:2:2264
-3430:2:2265
-3431:2:2266
-3432:2:2277
-3433:0:2739
-3434:1:42
-3435:0:2739
-3436:2:1175
-3437:0:2739
-3438:2:2023
-3439:2:2024
-3440:2:2028
-3441:2:2029
-3442:2:2037
-3443:2:2038
-3444:2:2042
-3445:2:2043
-3446:2:2051
-3447:2:2056
-3448:2:2060
-3449:2:2061
-3450:2:2069
-3451:2:2070
-3452:2:2074
-3453:2:2075
-3454:2:2069
-3455:2:2070
-3456:2:2074
-3457:2:2075
-3458:2:2083
-3459:2:2088
-3460:2:2089
-3461:2:2100
-3462:2:2101
-3463:2:2102
-3464:2:2113
-3465:2:2118
-3466:2:2119
-3467:2:2130
-3468:2:2131
-3469:2:2132
-3470:2:2130
-3471:2:2131
-3472:2:2132
-3473:2:2143
-3474:2:2151
-3475:0:2739
-3476:2:1175
-3477:0:2739
-3478:1:143
-3479:0:2739
-3480:2:2157
-3481:2:2158
-3482:2:2162
-3483:2:2163
-3484:2:2171
-3485:2:2172
-3486:2:2176
-3487:2:2177
-3488:2:2185
-3489:2:2190
-3490:2:2194
-3491:2:2195
-3492:2:2203
-3493:2:2204
-3494:2:2208
-3495:2:2209
-3496:2:2203
-3497:2:2204
-3498:2:2208
-3499:2:2209
-3500:2:2217
-3501:2:2222
-3502:2:2223
-3503:2:2234
-3504:2:2235
-3505:2:2236
-3506:2:2247
-3507:2:2252
-3508:2:2253
-3509:2:2264
-3510:2:2265
-3511:2:2266
-3512:2:2264
-3513:2:2265
-3514:2:2266
-3515:2:2277
-3516:0:2739
-3517:2:1175
-3518:0:2739
-3519:2:2023
-3520:2:2024
-3521:2:2028
-3522:2:2029
-3523:2:2037
-3524:2:2038
-3525:2:2042
-3526:2:2043
-3527:2:2051
-3528:2:2056
-3529:2:2060
-3530:2:2061
-3531:2:2069
-3532:2:2070
-3533:2:2074
-3534:2:2075
-3535:2:2069
-3536:2:2070
-3537:2:2074
-3538:2:2075
-3539:2:2083
-3540:2:2088
-3541:2:2089
-3542:2:2100
-3543:2:2101
-3544:2:2102
-3545:2:2113
-3546:2:2118
-3547:2:2119
-3548:2:2130
-3549:2:2131
-3550:2:2132
-3551:2:2130
-3552:2:2131
-3553:2:2132
-3554:2:2143
-3555:2:2151
-3556:0:2739
-3557:1:145
-3558:0:2737
-3559:2:1175
-3560:0:2743
-3561:2:2157
-3562:2:2158
-3563:2:2162
-3564:2:2163
-3565:2:2171
-3566:2:2172
-3567:2:2176
-3568:2:2177
-3569:2:2185
-3570:2:2190
-3571:2:2194
-3572:2:2195
-3573:2:2203
-3574:2:2204
-3575:2:2208
-3576:2:2209
-3577:2:2203
-3578:2:2204
-3579:2:2208
-3580:2:2209
-3581:2:2217
-3582:2:2222
-3583:2:2223
-3584:2:2234
-3585:2:2235
-3586:2:2236
-3587:2:2247
-3588:2:2252
-3589:2:2253
-3590:2:2264
-3591:2:2265
-3592:2:2266
-3593:2:2264
-3594:2:2265
-3595:2:2266
-3596:2:2277
-3597:0:2743
-3598:2:1175
-3599:0:2743
-3600:2:2023
-3601:2:2024
-3602:2:2028
-3603:2:2029
-3604:2:2037
-3605:2:2038
-3606:2:2042
-3607:2:2043
-3608:2:2051
-3609:2:2056
-3610:2:2060
-3611:2:2061
-3612:2:2069
-3613:2:2070
-3614:2:2074
-3615:2:2075
-3616:2:2069
-3617:2:2070
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-3619:2:2075
-3620:2:2083
-3621:2:2088
-3622:2:2089
-3623:2:2100
-3624:2:2101
-3625:2:2102
-3626:2:2113
-3627:2:2118
-3628:2:2119
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-3630:2:2131
-3631:2:2132
-3632:2:2130
-3633:2:2131
-3634:2:2132
-3635:2:2143
-3636:2:2151
-3637:0:2743
-3638:1:44
-3639:0:2743
-3640:2:1175
-3641:0:2743
-3642:2:2157
-3643:2:2158
-3644:2:2162
-3645:2:2163
-3646:2:2171
-3647:2:2172
-3648:2:2176
-3649:2:2177
-3650:2:2185
-3651:2:2190
-3652:2:2194
-3653:2:2195
-3654:2:2203
-3655:2:2204
-3656:2:2208
-3657:2:2209
-3658:2:2203
-3659:2:2204
-3660:2:2208
-3661:2:2209
-3662:2:2217
-3663:2:2222
-3664:2:2223
-3665:2:2234
-3666:2:2235
-3667:2:2236
-3668:2:2247
-3669:2:2252
-3670:2:2253
-3671:2:2264
-3672:2:2265
-3673:2:2266
-3674:2:2264
-3675:2:2265
-3676:2:2266
-3677:2:2277
-3678:0:2743
-3679:2:1175
-3680:0:2743
-3681:2:2023
-3682:2:2024
-3683:2:2028
-3684:2:2029
-3685:2:2037
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-3687:2:2042
-3688:2:2043
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-3695:2:2074
-3696:2:2075
-3697:2:2069
-3698:2:2070
-3699:2:2074
-3700:2:2075
-3701:2:2083
-3702:2:2088
-3703:2:2089
-3704:2:2100
-3705:2:2101
-3706:2:2102
-3707:2:2113
-3708:2:2118
-3709:2:2119
-3710:2:2130
-3711:2:2131
-3712:2:2132
-3713:2:2130
-3714:2:2131
-3715:2:2132
-3716:2:2143
-3717:2:2151
-3718:0:2743
-3719:1:681
-3720:1:682
-3721:1:686
-3722:1:687
-3723:1:695
-3724:1:696
-3725:1:697
-3726:1:709
-3727:1:714
-3728:1:718
-3729:1:719
-3730:1:727
-3731:1:728
-3732:1:732
-3733:1:733
-3734:1:727
-3735:1:728
-3736:1:732
-3737:1:733
-3738:1:741
-3739:1:746
-3740:1:747
-3741:1:758
-3742:1:759
-3743:1:760
-3744:1:771
-3745:1:776
-3746:1:777
-3747:1:788
-3748:1:789
-3749:1:790
-3750:1:788
-3751:1:789
-3752:1:790
-3753:1:801
-3754:0:2743
-3755:2:1175
-3756:0:2743
-3757:1:40
-3758:0:2743
-3759:1:41
-3760:0:2743
-3761:2:2157
-3762:2:2158
-3763:2:2162
-3764:2:2163
-3765:2:2171
-3766:2:2172
-3767:2:2176
-3768:2:2177
-3769:2:2185
-3770:2:2190
-3771:2:2194
-3772:2:2195
-3773:2:2203
-3774:2:2204
-3775:2:2208
-3776:2:2209
-3777:2:2203
-3778:2:2204
-3779:2:2208
-3780:2:2209
-3781:2:2217
-3782:2:2222
-3783:2:2223
-3784:2:2234
-3785:2:2242
-3786:2:2243
-3787:2:2247
-3788:2:2252
-3789:2:2253
-3790:2:2264
-3791:2:2265
-3792:2:2266
-3793:2:2264
-3794:2:2265
-3795:2:2266
-3796:2:2277
-3797:0:2743
-3798:2:1175
--1:-1:-1
-3799:0:2743
-3800:2:2023
-3801:2:2024
-3802:2:2028
-3803:2:2029
-3804:2:2037
-3805:2:2038
-3806:2:2042
-3807:2:2043
-3808:2:2051
-3809:2:2056
-3810:2:2060
-3811:2:2061
-3812:2:2069
-3813:2:2070
-3814:2:2074
-3815:2:2075
-3816:2:2069
-3817:2:2070
-3818:2:2074
-3819:2:2075
-3820:2:2083
-3821:2:2088
-3822:2:2089
-3823:2:2100
-3824:2:2108
-3825:2:2109
-3826:2:2113
-3827:2:2118
-3828:2:2119
-3829:2:2130
-3830:2:2131
-3831:2:2132
-3832:2:2130
-3833:2:2131
-3834:2:2132
-3835:2:2143
-3836:2:2151
-3837:0:2743
-3838:2:1175
-3839:0:2743
-3840:2:2157
-3841:2:2158
-3842:2:2162
-3843:2:2163
-3844:2:2171
-3845:2:2172
-3846:2:2176
-3847:2:2177
-3848:2:2185
-3849:2:2190
-3850:2:2194
-3851:2:2195
-3852:2:2203
-3853:2:2204
-3854:2:2208
-3855:2:2209
-3856:2:2203
-3857:2:2204
-3858:2:2208
-3859:2:2209
-3860:2:2217
-3861:2:2222
-3862:2:2223
-3863:2:2234
-3864:2:2242
-3865:2:2243
-3866:2:2247
-3867:2:2252
-3868:2:2253
-3869:2:2264
-3870:2:2265
-3871:2:2266
-3872:2:2264
-3873:2:2265
-3874:2:2266
-3875:2:2277
-3876:0:2743
-3877:2:1175
-3878:0:2743
-3879:2:2023
-3880:2:2024
-3881:2:2028
-3882:2:2029
-3883:2:2037
-3884:2:2038
-3885:2:2042
-3886:2:2043
-3887:2:2051
-3888:2:2056
-3889:2:2060
-3890:2:2061
-3891:2:2069
-3892:2:2070
-3893:2:2074
-3894:2:2075
-3895:2:2069
-3896:2:2070
-3897:2:2074
-3898:2:2075
-3899:2:2083
-3900:2:2088
-3901:2:2089
-3902:2:2100
-3903:2:2108
-3904:2:2109
-3905:2:2113
-3906:2:2118
-3907:2:2119
-3908:2:2130
-3909:2:2131
-3910:2:2132
-3911:2:2130
-3912:2:2131
-3913:2:2132
-3914:2:2143
-3915:2:2151
-3916:0:2743
-3917:2:1175
-3918:0:2743
-3919:2:2157
-3920:2:2158
-3921:2:2162
-3922:2:2163
-3923:2:2171
-3924:2:2172
-3925:2:2176
-3926:2:2177
-3927:2:2185
-3928:2:2190
-3929:2:2194
-3930:2:2195
-3931:2:2203
-3932:2:2204
-3933:2:2208
-3934:2:2209
-3935:2:2203
-3936:2:2204
-3937:2:2208
-3938:2:2209
-3939:2:2217
-3940:2:2222
-3941:2:2223
-3942:2:2234
-3943:2:2242
-3944:2:2243
-3945:2:2247
-3946:2:2252
-3947:2:2253
-3948:2:2264
-3949:2:2265
-3950:2:2266
-3951:2:2264
-3952:2:2265
-3953:2:2266
-3954:2:2277
-3955:0:2743
-3956:2:1175
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64 -DCOLLAPSE
-#CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- #state-space over 14gb..
- #make urcu_progress_writer | tee urcu_progress_writer.log
- #make urcu_progress_reader | tee urcu_progress_reader.log
- #make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 6176 States= 1e+06 Transitions= 1.77e+08 Memory= 497.600 t= 218 R= 5e+03
-Depth= 7720 States= 2e+06 Transitions= 3.71e+08 Memory= 528.654 t= 474 R= 4e+03
-Depth= 7720 States= 3e+06 Transitions= 5.8e+08 Memory= 561.955 t= 768 R= 4e+03
-pan: resizing hashtable to -w22.. done
-Depth= 7720 States= 4e+06 Transitions= 7.6e+08 Memory= 627.549 t= 999 R= 4e+03
-Depth= 7720 States= 5e+06 Transitions= 9.44e+08 Memory= 662.217 t= 1.24e+03 R= 4e+03
-Depth= 7720 States= 6e+06 Transitions= 1.35e+09 Memory= 699.619 t= 1.79e+03 R= 3e+03
-Depth= 7720 States= 7e+06 Transitions= 1.79e+09 Memory= 735.361 t= 2.39e+03 R= 3e+03
-Depth= 7720 States= 8e+06 Transitions= 2.11e+09 Memory= 773.545 t= 2.83e+03 R= 3e+03
-Depth= 7720 States= 9e+06 Transitions= 2.49e+09 Memory= 811.143 t= 3.37e+03 R= 3e+03
-pan: resizing hashtable to -w24.. done
-Depth= 7720 States= 1e+07 Transitions= 2.83e+09 Memory= 973.518 t= 3.8e+03 R= 3e+03
-Depth= 7720 States= 1.1e+07 Transitions= 3.2e+09 Memory= 1011.506 t= 4.27e+03 R= 3e+03
-Depth= 7720 States= 1.2e+07 Transitions= 3.59e+09 Memory= 1049.885 t= 4.78e+03 R= 3e+03
-Depth= 7720 States= 1.3e+07 Transitions= 3.81e+09 Memory= 1087.678 t= 5.06e+03 R= 3e+03
-Depth= 7720 States= 1.4e+07 Transitions= 4.12e+09 Memory= 1122.834 t= 5.46e+03 R= 3e+03
-Depth= 7720 States= 1.5e+07 Transitions= 4.35e+09 Memory= 1159.358 t= 5.75e+03 R= 3e+03
-Depth= 7720 States= 1.6e+07 Transitions= 4.88e+09 Memory= 1195.783 t= 6.46e+03 R= 2e+03
-Depth= 7720 States= 1.7e+07 Transitions= 5.67e+09 Memory= 1231.721 t= 7.51e+03 R= 2e+03
-Depth= 7720 States= 1.8e+07 Transitions= 6.31e+09 Memory= 1268.537 t= 8.37e+03 R= 2e+03
-Depth= 7720 States= 1.9e+07 Transitions= 6.77e+09 Memory= 1306.526 t= 8.98e+03 R= 2e+03
-Depth= 7720 States= 2e+07 Transitions= 7.09e+09 Memory= 1345.393 t= 9.41e+03 R= 2e+03
-Depth= 7720 States= 2.1e+07 Transitions= 7.48e+09 Memory= 1383.576 t= 9.93e+03 R= 2e+03
-Depth= 7720 States= 2.2e+07 Transitions= 7.94e+09 Memory= 1421.955 t= 1.06e+04 R= 2e+03
-Depth= 7720 States= 2.3e+07 Transitions= 8.37e+09 Memory= 1459.846 t= 1.11e+04 R= 2e+03
-Depth= 7720 States= 2.4e+07 Transitions= 8.77e+09 Memory= 1497.346 t= 1.17e+04 R= 2e+03
-Depth= 7720 States= 2.5e+07 Transitions= 9.22e+09 Memory= 1535.529 t= 1.23e+04 R= 2e+03
-Depth= 7720 States= 2.6e+07 Transitions= 9.48e+09 Memory= 1574.006 t= 1.26e+04 R= 2e+03
-Depth= 7720 States= 2.7e+07 Transitions= 9.85e+09 Memory= 1612.385 t= 1.31e+04 R= 2e+03
-Depth= 7720 States= 2.8e+07 Transitions= 1.02e+10 Memory= 1650.666 t= 1.37e+04 R= 2e+03
-Depth= 7940 States= 2.9e+07 Transitions= 1.06e+10 Memory= 1688.752 t= 1.41e+04 R= 2e+03
-Depth= 7998 States= 3e+07 Transitions= 1.09e+10 Memory= 1726.936 t= 1.46e+04 R= 2e+03
-Depth= 7998 States= 3.1e+07 Transitions= 1.13e+10 Memory= 1765.315 t= 1.51e+04 R= 2e+03
-Depth= 7998 States= 3.2e+07 Transitions= 1.16e+10 Memory= 1803.498 t= 1.55e+04 R= 2e+03
-Depth= 7998 States= 3.3e+07 Transitions= 1.19e+10 Memory= 1841.682 t= 1.6e+04 R= 2e+03
-Depth= 7998 States= 3.4e+07 Transitions= 1.23e+10 Memory= 1879.963 t= 1.65e+04 R= 2e+03
-pan: resizing hashtable to -w26.. done
-Depth= 7998 States= 3.5e+07 Transitions= 1.26e+10 Memory= 2414.131 t= 1.69e+04 R= 2e+03
-Depth= 7998 States= 3.6e+07 Transitions= 1.29e+10 Memory= 2452.315 t= 1.73e+04 R= 2e+03
-Depth= 7998 States= 3.7e+07 Transitions= 1.32e+10 Memory= 2490.498 t= 1.77e+04 R= 2e+03
-Depth= 7998 States= 3.8e+07 Transitions= 1.35e+10 Memory= 2528.584 t= 1.82e+04 R= 2e+03
-Depth= 7998 States= 3.9e+07 Transitions= 1.39e+10 Memory= 2566.768 t= 1.86e+04 R= 2e+03
-Depth= 7998 States= 4e+07 Transitions= 1.41e+10 Memory= 2604.951 t= 1.89e+04 R= 2e+03
-Depth= 7998 States= 4.1e+07 Transitions= 1.44e+10 Memory= 2643.135 t= 1.93e+04 R= 2e+03
-Depth= 7998 States= 4.2e+07 Transitions= 1.48e+10 Memory= 2682.002 t= 1.98e+04 R= 2e+03
-Depth= 7998 States= 4.3e+07 Transitions= 1.51e+10 Memory= 2720.283 t= 2.03e+04 R= 2e+03
-Depth= 7998 States= 4.4e+07 Transitions= 1.56e+10 Memory= 2759.053 t= 2.09e+04 R= 2e+03
-Depth= 7998 States= 4.5e+07 Transitions= 1.59e+10 Memory= 2797.432 t= 2.13e+04 R= 2e+03
-Depth= 7998 States= 4.6e+07 Transitions= 1.64e+10 Memory= 2836.201 t= 2.19e+04 R= 2e+03
-Depth= 7998 States= 4.7e+07 Transitions= 1.68e+10 Memory= 2875.068 t= 2.24e+04 R= 2e+03
-Depth= 7998 States= 4.8e+07 Transitions= 1.72e+10 Memory= 2913.643 t= 2.29e+04 R= 2e+03
-Depth= 7998 States= 4.9e+07 Transitions= 1.76e+10 Memory= 2952.412 t= 2.34e+04 R= 2e+03
-Depth= 7998 States= 5e+07 Transitions= 1.78e+10 Memory= 2989.619 t= 2.38e+04 R= 2e+03
-Depth= 7998 States= 5.1e+07 Transitions= 1.81e+10 Memory= 3027.901 t= 2.42e+04 R= 2e+03
-Depth= 7998 States= 5.2e+07 Transitions= 1.84e+10 Memory= 3066.279 t= 2.46e+04 R= 2e+03
-Depth= 7998 States= 5.3e+07 Transitions= 1.87e+10 Memory= 3104.463 t= 2.49e+04 R= 2e+03
-Depth= 7998 States= 5.4e+07 Transitions= 1.93e+10 Memory= 3142.842 t= 2.57e+04 R= 2e+03
-Depth= 7998 States= 5.5e+07 Transitions= 2.01e+10 Memory= 3181.026 t= 2.68e+04 R= 2e+03
-Depth= 7998 States= 5.6e+07 Transitions= 2.07e+10 Memory= 3219.990 t= 2.76e+04 R= 2e+03
-Depth= 7998 States= 5.7e+07 Transitions= 2.11e+10 Memory= 3258.467 t= 2.82e+04 R= 2e+03
-Depth= 7998 States= 5.8e+07 Transitions= 2.15e+10 Memory= 3297.236 t= 2.87e+04 R= 2e+03
-Depth= 7998 States= 5.9e+07 Transitions= 2.18e+10 Memory= 3334.151 t= 2.91e+04 R= 2e+03
-Depth= 7998 States= 6e+07 Transitions= 2.22e+10 Memory= 3372.432 t= 2.97e+04 R= 2e+03
-Depth= 7998 States= 6.1e+07 Transitions= 2.27e+10 Memory= 3410.713 t= 3.03e+04 R= 2e+03
-Depth= 7998 States= 6.2e+07 Transitions= 2.32e+10 Memory= 3448.701 t= 3.09e+04 R= 2e+03
-Depth= 7998 States= 6.3e+07 Transitions= 2.35e+10 Memory= 3485.615 t= 3.15e+04 R= 2e+03
-Depth= 7998 States= 6.4e+07 Transitions= 2.38e+10 Memory= 3523.604 t= 3.19e+04 R= 2e+03
-Depth= 7998 States= 6.5e+07 Transitions= 2.42e+10 Memory= 3561.690 t= 3.23e+04 R= 2e+03
-Depth= 7998 States= 6.6e+07 Transitions= 2.46e+10 Memory= 3598.799 t= 3.28e+04 R= 2e+03
-Depth= 7998 States= 6.7e+07 Transitions= 2.49e+10 Memory= 3635.225 t= 3.33e+04 R= 2e+03
-Depth= 7998 States= 6.8e+07 Transitions= 2.53e+10 Memory= 3672.139 t= 3.38e+04 R= 2e+03
-Depth= 7998 States= 6.9e+07 Transitions= 2.56e+10 Memory= 3706.807 t= 3.42e+04 R= 2e+03
-Depth= 7998 States= 7e+07 Transitions= 2.59e+10 Memory= 3743.916 t= 3.47e+04 R= 2e+03
-Depth= 7998 States= 7.1e+07 Transitions= 2.62e+10 Memory= 3781.026 t= 3.51e+04 R= 2e+03
-Depth= 7998 States= 7.2e+07 Transitions= 2.66e+10 Memory= 3818.721 t= 3.56e+04 R= 2e+03
-Depth= 7998 States= 7.3e+07 Transitions= 2.68e+10 Memory= 3855.244 t= 3.59e+04 R= 2e+03
-Depth= 7998 States= 7.4e+07 Transitions= 2.72e+10 Memory= 3892.647 t= 3.64e+04 R= 2e+03
-Depth= 7998 States= 7.5e+07 Transitions= 2.76e+10 Memory= 3930.049 t= 3.69e+04 R= 2e+03
-Depth= 7998 States= 7.6e+07 Transitions= 2.78e+10 Memory= 3966.963 t= 3.72e+04 R= 2e+03
-Depth= 7998 States= 7.7e+07 Transitions= 2.81e+10 Memory= 4003.975 t= 3.77e+04 R= 2e+03
-Depth= 7998 States= 7.8e+07 Transitions= 2.84e+10 Memory= 4041.084 t= 3.8e+04 R= 2e+03
-Depth= 7998 States= 7.9e+07 Transitions= 2.87e+10 Memory= 4078.584 t= 3.84e+04 R= 2e+03
-Depth= 7998 States= 8e+07 Transitions= 2.91e+10 Memory= 4114.815 t= 3.9e+04 R= 2e+03
-Depth= 7998 States= 8.1e+07 Transitions= 2.95e+10 Memory= 4151.240 t= 3.95e+04 R= 2e+03
-Depth= 7998 States= 8.2e+07 Transitions= 2.99e+10 Memory= 4189.131 t= 4e+04 R= 2e+03
-Depth= 7998 States= 8.3e+07 Transitions= 3.03e+10 Memory= 4226.533 t= 4.06e+04 R= 2e+03
-Depth= 7998 States= 8.4e+07 Transitions= 3.07e+10 Memory= 4264.912 t= 4.11e+04 R= 2e+03
-Depth= 7998 States= 8.5e+07 Transitions= 3.11e+10 Memory= 4302.998 t= 4.16e+04 R= 2e+03
-Depth= 7998 States= 8.6e+07 Transitions= 3.15e+10 Memory= 4340.693 t= 4.21e+04 R= 2e+03
-Depth= 7998 States= 8.7e+07 Transitions= 3.19e+10 Memory= 4378.877 t= 4.27e+04 R= 2e+03
-Depth= 7998 States= 8.8e+07 Transitions= 3.23e+10 Memory= 4417.061 t= 4.32e+04 R= 2e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 72 byte, depth reached 7998, errors: 0
- 88716525 states, stored
-3.2432758e+10 states, matched
-3.2521475e+10 transitions (= stored+matched)
-1.8325967e+11 atomic steps
-hash conflicts: 1.7127982e+10 (resolved)
-
-Stats on memory usage (in Megabytes):
- 8460.667 equivalent memory usage for states (stored*(State-vector + overhead))
- 3474.757 actual memory usage for states (compression: 41.07%)
- state-vector as stored = 13 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 4444.111 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 606546 5194 3779 2 ]
-unreached in proctype urcu_reader
- line 267, ".input.spin", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 275, ".input.spin", state 79, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 88, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 104, "(1)"
- line 248, ".input.spin", state 112, "(1)"
- line 252, ".input.spin", state 124, "(1)"
- line 256, ".input.spin", state 132, "(1)"
- line 406, ".input.spin", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 190, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 204, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 223, "(1)"
- line 433, ".input.spin", state 253, "(1)"
- line 437, ".input.spin", state 266, "(1)"
- line 686, ".input.spin", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 406, ".input.spin", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 326, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 340, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 359, "(1)"
- line 433, ".input.spin", state 389, "(1)"
- line 437, ".input.spin", state 402, "(1)"
- line 406, ".input.spin", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 455, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 469, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 488, "(1)"
- line 433, ".input.spin", state 518, "(1)"
- line 437, ".input.spin", state 531, "(1)"
- line 406, ".input.spin", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 406, ".input.spin", state 556, "(1)"
- line 406, ".input.spin", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 406, ".input.spin", state 557, "else"
- line 406, ".input.spin", state 560, "(1)"
- line 410, ".input.spin", state 568, "cache_dirty_urcu_active_readers = 0"
- line 410, ".input.spin", state 570, "(1)"
- line 410, ".input.spin", state 571, "(cache_dirty_urcu_active_readers)"
- line 410, ".input.spin", state 571, "else"
- line 410, ".input.spin", state 574, "(1)"
- line 410, ".input.spin", state 575, "(1)"
- line 410, ".input.spin", state 575, "(1)"
- line 408, ".input.spin", state 580, "((i<1))"
- line 408, ".input.spin", state 580, "((i>=1))"
- line 415, ".input.spin", state 586, "cache_dirty_rcu_ptr = 0"
- line 415, ".input.spin", state 588, "(1)"
- line 415, ".input.spin", state 589, "(cache_dirty_rcu_ptr)"
- line 415, ".input.spin", state 589, "else"
- line 415, ".input.spin", state 592, "(1)"
- line 415, ".input.spin", state 593, "(1)"
- line 415, ".input.spin", state 593, "(1)"
- line 419, ".input.spin", state 600, "cache_dirty_rcu_data[i] = 0"
- line 419, ".input.spin", state 602, "(1)"
- line 419, ".input.spin", state 603, "(cache_dirty_rcu_data[i])"
- line 419, ".input.spin", state 603, "else"
- line 419, ".input.spin", state 606, "(1)"
- line 419, ".input.spin", state 607, "(1)"
- line 419, ".input.spin", state 607, "(1)"
- line 417, ".input.spin", state 612, "((i<2))"
- line 417, ".input.spin", state 612, "((i>=2))"
- line 424, ".input.spin", state 619, "(1)"
- line 424, ".input.spin", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 424, ".input.spin", state 620, "else"
- line 424, ".input.spin", state 623, "(1)"
- line 424, ".input.spin", state 624, "(1)"
- line 424, ".input.spin", state 624, "(1)"
- line 428, ".input.spin", state 632, "(1)"
- line 428, ".input.spin", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 428, ".input.spin", state 633, "else"
- line 428, ".input.spin", state 636, "(1)"
- line 428, ".input.spin", state 637, "(1)"
- line 428, ".input.spin", state 637, "(1)"
- line 426, ".input.spin", state 642, "((i<1))"
- line 426, ".input.spin", state 642, "((i>=1))"
- line 433, ".input.spin", state 649, "(1)"
- line 433, ".input.spin", state 650, "(!(cache_dirty_rcu_ptr))"
- line 433, ".input.spin", state 650, "else"
- line 433, ".input.spin", state 653, "(1)"
- line 433, ".input.spin", state 654, "(1)"
- line 433, ".input.spin", state 654, "(1)"
- line 437, ".input.spin", state 662, "(1)"
- line 437, ".input.spin", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 437, ".input.spin", state 663, "else"
- line 437, ".input.spin", state 666, "(1)"
- line 437, ".input.spin", state 667, "(1)"
- line 437, ".input.spin", state 667, "(1)"
- line 435, ".input.spin", state 672, "((i<2))"
- line 435, ".input.spin", state 672, "((i>=2))"
- line 445, ".input.spin", state 676, "(1)"
- line 445, ".input.spin", state 676, "(1)"
- line 686, ".input.spin", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 686, ".input.spin", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 686, ".input.spin", state 681, "(1)"
- line 406, ".input.spin", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 720, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 734, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 753, "(1)"
- line 433, ".input.spin", state 783, "(1)"
- line 437, ".input.spin", state 796, "(1)"
- line 406, ".input.spin", state 824, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 856, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 870, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 889, "(1)"
- line 433, ".input.spin", state 919, "(1)"
- line 437, ".input.spin", state 932, "(1)"
- line 406, ".input.spin", state 953, "cache_dirty_urcu_gp_ctr = 0"
- line 406, ".input.spin", state 955, "(1)"
- line 406, ".input.spin", state 956, "(cache_dirty_urcu_gp_ctr)"
- line 406, ".input.spin", state 956, "else"
- line 406, ".input.spin", state 959, "(1)"
- line 410, ".input.spin", state 967, "cache_dirty_urcu_active_readers = 0"
- line 410, ".input.spin", state 969, "(1)"
- line 410, ".input.spin", state 970, "(cache_dirty_urcu_active_readers)"
- line 410, ".input.spin", state 970, "else"
- line 410, ".input.spin", state 973, "(1)"
- line 410, ".input.spin", state 974, "(1)"
- line 410, ".input.spin", state 974, "(1)"
- line 408, ".input.spin", state 979, "((i<1))"
- line 408, ".input.spin", state 979, "((i>=1))"
- line 415, ".input.spin", state 985, "cache_dirty_rcu_ptr = 0"
- line 415, ".input.spin", state 987, "(1)"
- line 415, ".input.spin", state 988, "(cache_dirty_rcu_ptr)"
- line 415, ".input.spin", state 988, "else"
- line 415, ".input.spin", state 991, "(1)"
- line 415, ".input.spin", state 992, "(1)"
- line 415, ".input.spin", state 992, "(1)"
- line 419, ".input.spin", state 999, "cache_dirty_rcu_data[i] = 0"
- line 419, ".input.spin", state 1001, "(1)"
- line 419, ".input.spin", state 1002, "(cache_dirty_rcu_data[i])"
- line 419, ".input.spin", state 1002, "else"
- line 419, ".input.spin", state 1005, "(1)"
- line 419, ".input.spin", state 1006, "(1)"
- line 419, ".input.spin", state 1006, "(1)"
- line 417, ".input.spin", state 1011, "((i<2))"
- line 417, ".input.spin", state 1011, "((i>=2))"
- line 424, ".input.spin", state 1018, "(1)"
- line 424, ".input.spin", state 1019, "(!(cache_dirty_urcu_gp_ctr))"
- line 424, ".input.spin", state 1019, "else"
- line 424, ".input.spin", state 1022, "(1)"
- line 424, ".input.spin", state 1023, "(1)"
- line 424, ".input.spin", state 1023, "(1)"
- line 428, ".input.spin", state 1031, "(1)"
- line 428, ".input.spin", state 1032, "(!(cache_dirty_urcu_active_readers))"
- line 428, ".input.spin", state 1032, "else"
- line 428, ".input.spin", state 1035, "(1)"
- line 428, ".input.spin", state 1036, "(1)"
- line 428, ".input.spin", state 1036, "(1)"
- line 426, ".input.spin", state 1041, "((i<1))"
- line 426, ".input.spin", state 1041, "((i>=1))"
- line 433, ".input.spin", state 1048, "(1)"
- line 433, ".input.spin", state 1049, "(!(cache_dirty_rcu_ptr))"
- line 433, ".input.spin", state 1049, "else"
- line 433, ".input.spin", state 1052, "(1)"
- line 433, ".input.spin", state 1053, "(1)"
- line 433, ".input.spin", state 1053, "(1)"
- line 437, ".input.spin", state 1061, "(1)"
- line 437, ".input.spin", state 1062, "(!(cache_dirty_rcu_data[i]))"
- line 437, ".input.spin", state 1062, "else"
- line 437, ".input.spin", state 1065, "(1)"
- line 437, ".input.spin", state 1066, "(1)"
- line 437, ".input.spin", state 1066, "(1)"
- line 435, ".input.spin", state 1071, "((i<2))"
- line 435, ".input.spin", state 1071, "((i>=2))"
- line 445, ".input.spin", state 1075, "(1)"
- line 445, ".input.spin", state 1075, "(1)"
- line 694, ".input.spin", state 1079, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 406, ".input.spin", state 1084, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1116, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1130, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1149, "(1)"
- line 433, ".input.spin", state 1179, "(1)"
- line 437, ".input.spin", state 1192, "(1)"
- line 406, ".input.spin", state 1216, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1248, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1262, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1281, "(1)"
- line 433, ".input.spin", state 1311, "(1)"
- line 437, ".input.spin", state 1324, "(1)"
- line 406, ".input.spin", state 1349, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1381, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1395, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1414, "(1)"
- line 433, ".input.spin", state 1444, "(1)"
- line 437, ".input.spin", state 1457, "(1)"
- line 406, ".input.spin", state 1478, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1510, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1524, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1543, "(1)"
- line 433, ".input.spin", state 1573, "(1)"
- line 437, ".input.spin", state 1586, "(1)"
- line 406, ".input.spin", state 1612, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1644, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1658, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1677, "(1)"
- line 433, ".input.spin", state 1707, "(1)"
- line 437, ".input.spin", state 1720, "(1)"
- line 406, ".input.spin", state 1741, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1773, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1787, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1806, "(1)"
- line 433, ".input.spin", state 1836, "(1)"
- line 437, ".input.spin", state 1849, "(1)"
- line 406, ".input.spin", state 1873, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 1905, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 1919, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 1938, "(1)"
- line 433, ".input.spin", state 1968, "(1)"
- line 437, ".input.spin", state 1981, "(1)"
- line 733, ".input.spin", state 2002, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 406, ".input.spin", state 2009, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 2041, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 2055, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 2074, "(1)"
- line 433, ".input.spin", state 2104, "(1)"
- line 437, ".input.spin", state 2117, "(1)"
- line 406, ".input.spin", state 2138, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 2170, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 2184, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 2203, "(1)"
- line 433, ".input.spin", state 2233, "(1)"
- line 437, ".input.spin", state 2246, "(1)"
- line 406, ".input.spin", state 2269, "cache_dirty_urcu_gp_ctr = 0"
- line 406, ".input.spin", state 2271, "(1)"
- line 406, ".input.spin", state 2272, "(cache_dirty_urcu_gp_ctr)"
- line 406, ".input.spin", state 2272, "else"
- line 406, ".input.spin", state 2275, "(1)"
- line 410, ".input.spin", state 2283, "cache_dirty_urcu_active_readers = 0"
- line 410, ".input.spin", state 2285, "(1)"
- line 410, ".input.spin", state 2286, "(cache_dirty_urcu_active_readers)"
- line 410, ".input.spin", state 2286, "else"
- line 410, ".input.spin", state 2289, "(1)"
- line 410, ".input.spin", state 2290, "(1)"
- line 410, ".input.spin", state 2290, "(1)"
- line 408, ".input.spin", state 2295, "((i<1))"
- line 408, ".input.spin", state 2295, "((i>=1))"
- line 415, ".input.spin", state 2301, "cache_dirty_rcu_ptr = 0"
- line 415, ".input.spin", state 2303, "(1)"
- line 415, ".input.spin", state 2304, "(cache_dirty_rcu_ptr)"
- line 415, ".input.spin", state 2304, "else"
- line 415, ".input.spin", state 2307, "(1)"
- line 415, ".input.spin", state 2308, "(1)"
- line 415, ".input.spin", state 2308, "(1)"
- line 419, ".input.spin", state 2315, "cache_dirty_rcu_data[i] = 0"
- line 419, ".input.spin", state 2317, "(1)"
- line 419, ".input.spin", state 2318, "(cache_dirty_rcu_data[i])"
- line 419, ".input.spin", state 2318, "else"
- line 419, ".input.spin", state 2321, "(1)"
- line 419, ".input.spin", state 2322, "(1)"
- line 419, ".input.spin", state 2322, "(1)"
- line 417, ".input.spin", state 2327, "((i<2))"
- line 417, ".input.spin", state 2327, "((i>=2))"
- line 424, ".input.spin", state 2334, "(1)"
- line 424, ".input.spin", state 2335, "(!(cache_dirty_urcu_gp_ctr))"
- line 424, ".input.spin", state 2335, "else"
- line 424, ".input.spin", state 2338, "(1)"
- line 424, ".input.spin", state 2339, "(1)"
- line 424, ".input.spin", state 2339, "(1)"
- line 428, ".input.spin", state 2347, "(1)"
- line 428, ".input.spin", state 2348, "(!(cache_dirty_urcu_active_readers))"
- line 428, ".input.spin", state 2348, "else"
- line 428, ".input.spin", state 2351, "(1)"
- line 428, ".input.spin", state 2352, "(1)"
- line 428, ".input.spin", state 2352, "(1)"
- line 426, ".input.spin", state 2357, "((i<1))"
- line 426, ".input.spin", state 2357, "((i>=1))"
- line 433, ".input.spin", state 2364, "(1)"
- line 433, ".input.spin", state 2365, "(!(cache_dirty_rcu_ptr))"
- line 433, ".input.spin", state 2365, "else"
- line 433, ".input.spin", state 2368, "(1)"
- line 433, ".input.spin", state 2369, "(1)"
- line 433, ".input.spin", state 2369, "(1)"
- line 437, ".input.spin", state 2377, "(1)"
- line 437, ".input.spin", state 2378, "(!(cache_dirty_rcu_data[i]))"
- line 437, ".input.spin", state 2378, "else"
- line 437, ".input.spin", state 2381, "(1)"
- line 437, ".input.spin", state 2382, "(1)"
- line 437, ".input.spin", state 2382, "(1)"
- line 435, ".input.spin", state 2387, "((i<2))"
- line 435, ".input.spin", state 2387, "((i>=2))"
- line 445, ".input.spin", state 2391, "(1)"
- line 445, ".input.spin", state 2391, "(1)"
- line 733, ".input.spin", state 2394, "cached_urcu_active_readers = (tmp+1)"
- line 733, ".input.spin", state 2395, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 733, ".input.spin", state 2396, "(1)"
- line 406, ".input.spin", state 2403, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 2435, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 2449, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 2468, "(1)"
- line 433, ".input.spin", state 2498, "(1)"
- line 437, ".input.spin", state 2511, "(1)"
- line 406, ".input.spin", state 2538, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 2570, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 2584, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 2603, "(1)"
- line 433, ".input.spin", state 2633, "(1)"
- line 437, ".input.spin", state 2646, "(1)"
- line 406, ".input.spin", state 2667, "cache_dirty_urcu_gp_ctr = 0"
- line 415, ".input.spin", state 2699, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 2713, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 2732, "(1)"
- line 433, ".input.spin", state 2762, "(1)"
- line 437, ".input.spin", state 2775, "(1)"
- line 244, ".input.spin", state 2808, "(1)"
- line 252, ".input.spin", state 2828, "(1)"
- line 256, ".input.spin", state 2836, "(1)"
- line 244, ".input.spin", state 2851, "(1)"
- line 252, ".input.spin", state 2871, "(1)"
- line 256, ".input.spin", state 2879, "(1)"
- line 928, ".input.spin", state 2896, "-end-"
- (245 of 2896 states)
-unreached in proctype urcu_writer
- line 406, ".input.spin", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 410, ".input.spin", state 59, "cache_dirty_urcu_active_readers = 0"
- line 415, ".input.spin", state 77, "cache_dirty_rcu_ptr = 0"
- line 424, ".input.spin", state 110, "(1)"
- line 428, ".input.spin", state 123, "(1)"
- line 433, ".input.spin", state 140, "(1)"
- line 267, ".input.spin", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 185, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 198, "cache_dirty_rcu_ptr = 0"
- line 406, ".input.spin", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 410, ".input.spin", state 252, "cache_dirty_urcu_active_readers = 0"
- line 415, ".input.spin", state 270, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 284, "cache_dirty_rcu_data[i] = 0"
- line 424, ".input.spin", state 303, "(1)"
- line 428, ".input.spin", state 316, "(1)"
- line 433, ".input.spin", state 333, "(1)"
- line 437, ".input.spin", state 346, "(1)"
- line 410, ".input.spin", state 383, "cache_dirty_urcu_active_readers = 0"
- line 415, ".input.spin", state 401, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 415, "cache_dirty_rcu_data[i] = 0"
- line 428, ".input.spin", state 447, "(1)"
- line 433, ".input.spin", state 464, "(1)"
- line 437, ".input.spin", state 477, "(1)"
- line 410, ".input.spin", state 522, "cache_dirty_urcu_active_readers = 0"
- line 415, ".input.spin", state 540, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 554, "cache_dirty_rcu_data[i] = 0"
- line 428, ".input.spin", state 586, "(1)"
- line 433, ".input.spin", state 603, "(1)"
- line 437, ".input.spin", state 616, "(1)"
- line 410, ".input.spin", state 651, "cache_dirty_urcu_active_readers = 0"
- line 415, ".input.spin", state 669, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 683, "cache_dirty_rcu_data[i] = 0"
- line 428, ".input.spin", state 715, "(1)"
- line 433, ".input.spin", state 732, "(1)"
- line 437, ".input.spin", state 745, "(1)"
- line 410, ".input.spin", state 782, "cache_dirty_urcu_active_readers = 0"
- line 415, ".input.spin", state 800, "cache_dirty_rcu_ptr = 0"
- line 419, ".input.spin", state 814, "cache_dirty_rcu_data[i] = 0"
- line 428, ".input.spin", state 846, "(1)"
- line 433, ".input.spin", state 863, "(1)"
- line 437, ".input.spin", state 876, "(1)"
- line 267, ".input.spin", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 940, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 955, "(1)"
- line 279, ".input.spin", state 962, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 978, "(1)"
- line 248, ".input.spin", state 986, "(1)"
- line 252, ".input.spin", state 998, "(1)"
- line 256, ".input.spin", state 1006, "(1)"
- line 267, ".input.spin", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1059, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1084, "(1)"
- line 248, ".input.spin", state 1092, "(1)"
- line 252, ".input.spin", state 1104, "(1)"
- line 256, ".input.spin", state 1112, "(1)"
- line 271, ".input.spin", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1151, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1176, "(1)"
- line 248, ".input.spin", state 1184, "(1)"
- line 252, ".input.spin", state 1196, "(1)"
- line 256, ".input.spin", state 1204, "(1)"
- line 267, ".input.spin", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1257, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1282, "(1)"
- line 248, ".input.spin", state 1290, "(1)"
- line 252, ".input.spin", state 1302, "(1)"
- line 256, ".input.spin", state 1310, "(1)"
- line 271, ".input.spin", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1349, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1374, "(1)"
- line 248, ".input.spin", state 1382, "(1)"
- line 252, ".input.spin", state 1394, "(1)"
- line 256, ".input.spin", state 1402, "(1)"
- line 267, ".input.spin", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1455, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1480, "(1)"
- line 248, ".input.spin", state 1488, "(1)"
- line 252, ".input.spin", state 1500, "(1)"
- line 256, ".input.spin", state 1508, "(1)"
- line 271, ".input.spin", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1547, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1572, "(1)"
- line 248, ".input.spin", state 1580, "(1)"
- line 252, ".input.spin", state 1592, "(1)"
- line 256, ".input.spin", state 1600, "(1)"
- line 267, ".input.spin", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 271, ".input.spin", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 275, ".input.spin", state 1653, "cache_dirty_rcu_ptr = 0"
- line 279, ".input.spin", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 244, ".input.spin", state 1678, "(1)"
- line 248, ".input.spin", state 1686, "(1)"
- line 252, ".input.spin", state 1698, "(1)"
- line 256, ".input.spin", state 1706, "(1)"
- line 1303, ".input.spin", state 1722, "-end-"
- (103 of 1722 states)
-unreached in proctype :init:
- (0 of 28 states)
-
-pan: elapsed time 4.35e+04 seconds
-pan: rate 2039.1355 states/second
-pan: avg transition delay 1.3378e-06 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1361)
-Depth= 8053 States= 1e+06 Transitions= 1.77e+08 Memory= 513.029 t= 265 R= 4e+03
-Depth= 9797 States= 2e+06 Transitions= 3.71e+08 Memory= 559.416 t= 575 R= 3e+03
-Depth= 9797 States= 3e+06 Transitions= 5.8e+08 Memory= 605.901 t= 922 R= 3e+03
-pan: resizing hashtable to -w22.. done
-Depth= 9797 States= 4e+06 Transitions= 7.6e+08 Memory= 682.920 t= 1.2e+03 R= 3e+03
-Depth= 9797 States= 5e+06 Transitions= 9.44e+08 Memory= 728.721 t= 1.48e+03 R= 3e+03
-Depth= 9797 States= 6e+06 Transitions= 1.35e+09 Memory= 775.303 t= 2.13e+03 R= 3e+03
-Depth= 9797 States= 7e+06 Transitions= 1.79e+09 Memory= 821.885 t= 2.85e+03 R= 2e+03
-Depth= 9797 States= 8e+06 Transitions= 2.11e+09 Memory= 868.076 t= 3.36e+03 R= 2e+03
-Depth= 9797 States= 9e+06 Transitions= 2.49e+09 Memory= 914.658 t= 4.01e+03 R= 2e+03
-pan: resizing hashtable to -w24.. done
-Depth= 9797 States= 1e+07 Transitions= 2.83e+09 Memory= 1085.529 t= 4.52e+03 R= 2e+03
-Depth= 9797 States= 1.1e+07 Transitions= 3.2e+09 Memory= 1132.697 t= 5.08e+03 R= 2e+03
-Depth= 9797 States= 1.2e+07 Transitions= 3.59e+09 Memory= 1179.670 t= 5.69e+03 R= 2e+03
-Depth= 9797 States= 1.3e+07 Transitions= 3.81e+09 Memory= 1226.838 t= 6.03e+03 R= 2e+03
-Depth= 9797 States= 1.4e+07 Transitions= 4.12e+09 Memory= 1273.029 t= 6.5e+03 R= 2e+03
-Depth= 9797 States= 1.5e+07 Transitions= 4.35e+09 Memory= 1319.123 t= 6.85e+03 R= 2e+03
-Depth= 9797 States= 1.6e+07 Transitions= 4.88e+09 Memory= 1365.608 t= 7.7e+03 R= 2e+03
-Depth= 9797 States= 1.7e+07 Transitions= 5.67e+09 Memory= 1411.506 t= 8.95e+03 R= 2e+03
-Depth= 9797 States= 1.8e+07 Transitions= 6.31e+09 Memory= 1458.479 t= 9.98e+03 R= 2e+03
-Depth= 9797 States= 1.9e+07 Transitions= 6.77e+09 Memory= 1504.963 t= 1.07e+04 R= 2e+03
-Depth= 9797 States= 2e+07 Transitions= 7.09e+09 Memory= 1552.131 t= 1.12e+04 R= 2e+03
-Depth= 9797 States= 2.1e+07 Transitions= 7.48e+09 Memory= 1598.615 t= 1.18e+04 R= 2e+03
-Depth= 9797 States= 2.2e+07 Transitions= 7.94e+09 Memory= 1645.295 t= 1.26e+04 R= 2e+03
-Depth= 9797 States= 2.3e+07 Transitions= 8.37e+09 Memory= 1691.486 t= 1.33e+04 R= 2e+03
-Depth= 9797 States= 2.4e+07 Transitions= 8.77e+09 Memory= 1737.678 t= 1.39e+04 R= 2e+03
-Depth= 9797 States= 2.5e+07 Transitions= 9.22e+09 Memory= 1783.967 t= 1.46e+04 R= 2e+03
-Depth= 9797 States= 2.6e+07 Transitions= 9.48e+09 Memory= 1830.061 t= 1.5e+04 R= 2e+03
-Depth= 9797 States= 2.7e+07 Transitions= 9.85e+09 Memory= 1876.350 t= 1.56e+04 R= 2e+03
-Depth= 9797 States= 2.8e+07 Transitions= 1.02e+10 Memory= 1922.639 t= 1.62e+04 R= 2e+03
-Depth= 9919 States= 2.9e+07 Transitions= 1.06e+10 Memory= 1968.537 t= 1.68e+04 R= 2e+03
-Depth= 9963 States= 3e+07 Transitions= 1.09e+10 Memory= 2014.338 t= 1.74e+04 R= 2e+03
-Depth= 9963 States= 3.1e+07 Transitions= 1.13e+10 Memory= 2060.334 t= 1.79e+04 R= 2e+03
-Depth= 9963 States= 3.2e+07 Transitions= 1.16e+10 Memory= 2106.233 t= 1.85e+04 R= 2e+03
-Depth= 9963 States= 3.3e+07 Transitions= 1.19e+10 Memory= 2152.033 t= 1.9e+04 R= 2e+03
-Depth= 9963 States= 3.4e+07 Transitions= 1.23e+10 Memory= 2198.029 t= 1.96e+04 R= 2e+03
-pan: resizing hashtable to -w26.. done
-Depth= 9963 States= 3.5e+07 Transitions= 1.26e+10 Memory= 2739.912 t= 2e+04 R= 2e+03
-Depth= 9963 States= 3.6e+07 Transitions= 1.29e+10 Memory= 2785.713 t= 2.06e+04 R= 2e+03
-Depth= 9963 States= 3.7e+07 Transitions= 1.32e+10 Memory= 2831.416 t= 2.1e+04 R= 2e+03
-Depth= 9963 States= 3.8e+07 Transitions= 1.35e+10 Memory= 2877.217 t= 2.15e+04 R= 2e+03
-Depth= 9963 States= 3.9e+07 Transitions= 1.39e+10 Memory= 2923.018 t= 2.2e+04 R= 2e+03
-Depth= 9963 States= 4e+07 Transitions= 1.41e+10 Memory= 2968.818 t= 2.24e+04 R= 2e+03
-Depth= 9963 States= 4.1e+07 Transitions= 1.44e+10 Memory= 3014.717 t= 2.29e+04 R= 2e+03
-Depth= 9963 States= 4.2e+07 Transitions= 1.48e+10 Memory= 3061.299 t= 2.35e+04 R= 2e+03
-Depth= 9963 States= 4.3e+07 Transitions= 1.51e+10 Memory= 3107.295 t= 2.4e+04 R= 2e+03
-Depth= 9963 States= 4.4e+07 Transitions= 1.56e+10 Memory= 3153.779 t= 2.48e+04 R= 2e+03
-Depth= 9963 States= 4.5e+07 Transitions= 1.59e+10 Memory= 3199.873 t= 2.53e+04 R= 2e+03
-Depth= 9963 States= 4.6e+07 Transitions= 1.64e+10 Memory= 3246.553 t= 2.59e+04 R= 2e+03
-Depth= 9963 States= 4.7e+07 Transitions= 1.68e+10 Memory= 3293.623 t= 2.66e+04 R= 2e+03
-Depth= 9963 States= 4.8e+07 Transitions= 1.72e+10 Memory= 3339.912 t= 2.72e+04 R= 2e+03
-Depth= 9963 States= 4.9e+07 Transitions= 1.76e+10 Memory= 3386.494 t= 2.78e+04 R= 2e+03
-Depth= 9963 States= 5e+07 Transitions= 1.78e+10 Memory= 3433.076 t= 2.82e+04 R= 2e+03
-Depth= 9963 States= 5.1e+07 Transitions= 1.81e+10 Memory= 3479.072 t= 2.87e+04 R= 2e+03
-Depth= 9963 States= 5.2e+07 Transitions= 1.84e+10 Memory= 3525.068 t= 2.91e+04 R= 2e+03
-Depth= 9963 States= 5.3e+07 Transitions= 1.87e+10 Memory= 3570.869 t= 2.95e+04 R= 2e+03
-Depth= 9963 States= 5.4e+07 Transitions= 1.93e+10 Memory= 3616.865 t= 3.05e+04 R= 2e+03
-Depth= 9963 States= 5.5e+07 Transitions= 2.01e+10 Memory= 3662.764 t= 3.17e+04 R= 2e+03
-Depth= 9963 States= 5.6e+07 Transitions= 2.07e+10 Memory= 3709.541 t= 3.27e+04 R= 2e+03
-Depth= 9963 States= 5.7e+07 Transitions= 2.11e+10 Memory= 3755.635 t= 3.34e+04 R= 2e+03
-Depth= 9963 States= 5.8e+07 Transitions= 2.15e+10 Memory= 3802.315 t= 3.4e+04 R= 2e+03
-Depth= 9963 States= 5.9e+07 Transitions= 2.18e+10 Memory= 3848.408 t= 3.45e+04 R= 2e+03
-Depth= 9963 States= 6e+07 Transitions= 2.22e+10 Memory= 3894.404 t= 3.52e+04 R= 2e+03
-Depth= 9963 States= 6.1e+07 Transitions= 2.27e+10 Memory= 3940.596 t= 3.59e+04 R= 2e+03
-Depth= 9963 States= 6.2e+07 Transitions= 2.32e+10 Memory= 3986.494 t= 3.66e+04 R= 2e+03
-Depth= 9963 States= 6.3e+07 Transitions= 2.35e+10 Memory= 4032.295 t= 3.73e+04 R= 2e+03
-Depth= 9963 States= 6.4e+07 Transitions= 2.38e+10 Memory= 4078.193 t= 3.77e+04 R= 2e+03
-Depth= 9963 States= 6.5e+07 Transitions= 2.42e+10 Memory= 4124.092 t= 3.83e+04 R= 2e+03
-Depth= 9963 States= 6.6e+07 Transitions= 2.46e+10 Memory= 4169.990 t= 3.89e+04 R= 2e+03
-Depth= 9963 States= 6.7e+07 Transitions= 2.49e+10 Memory= 4215.791 t= 3.94e+04 R= 2e+03
-Depth= 9963 States= 6.8e+07 Transitions= 2.53e+10 Memory= 4261.494 t= 4e+04 R= 2e+03
-Depth= 9963 States= 6.9e+07 Transitions= 2.56e+10 Memory= 4307.295 t= 4.04e+04 R= 2e+03
-Depth= 9963 States= 7e+07 Transitions= 2.59e+10 Memory= 4353.096 t= 4.11e+04 R= 2e+03
-Depth= 9963 States= 7.1e+07 Transitions= 2.62e+10 Memory= 4398.897 t= 4.15e+04 R= 2e+03
-Depth= 9963 States= 7.2e+07 Transitions= 2.66e+10 Memory= 4444.697 t= 4.21e+04 R= 2e+03
-Depth= 9963 States= 7.3e+07 Transitions= 2.68e+10 Memory= 4490.498 t= 4.25e+04 R= 2e+03
-Depth= 9963 States= 7.4e+07 Transitions= 2.72e+10 Memory= 4536.299 t= 4.31e+04 R= 2e+03
-Depth= 9963 States= 7.5e+07 Transitions= 2.76e+10 Memory= 4582.002 t= 4.37e+04 R= 2e+03
-Depth= 9963 States= 7.6e+07 Transitions= 2.78e+10 Memory= 4627.803 t= 4.41e+04 R= 2e+03
-Depth= 9963 States= 7.7e+07 Transitions= 2.81e+10 Memory= 4673.604 t= 4.46e+04 R= 2e+03
-Depth= 9963 States= 7.8e+07 Transitions= 2.84e+10 Memory= 4719.404 t= 4.5e+04 R= 2e+03
-Depth= 9963 States= 7.9e+07 Transitions= 2.87e+10 Memory= 4765.205 t= 4.55e+04 R= 2e+03
-Depth= 9963 States= 8e+07 Transitions= 2.91e+10 Memory= 4811.006 t= 4.61e+04 R= 2e+03
-Depth= 9963 States= 8.1e+07 Transitions= 2.95e+10 Memory= 4856.807 t= 4.68e+04 R= 2e+03
-Depth= 9963 States= 8.2e+07 Transitions= 2.99e+10 Memory= 4902.608 t= 4.74e+04 R= 2e+03
-Depth= 9963 States= 8.3e+07 Transitions= 3.03e+10 Memory= 4948.701 t= 4.8e+04 R= 2e+03
-Depth= 9963 States= 8.4e+07 Transitions= 3.07e+10 Memory= 4995.283 t= 4.87e+04 R= 2e+03
-Depth= 9963 States= 8.5e+07 Transitions= 3.11e+10 Memory= 5041.084 t= 4.93e+04 R= 2e+03
-Depth= 9963 States= 8.6e+07 Transitions= 3.15e+10 Memory= 5087.276 t= 4.98e+04 R= 2e+03
-Depth= 9963 States= 8.7e+07 Transitions= 3.19e+10 Memory= 5133.369 t= 5.06e+04 R= 2e+03
-Depth= 9963 States= 8.8e+07 Transitions= 3.23e+10 Memory= 5179.170 t= 5.11e+04 R= 2e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 9963, errors: 0
- 88716525 states, stored
-3.243293e+10 states, matched
-3.2521646e+10 transitions (= stored+matched)
-1.8325967e+11 atomic steps
-hash conflicts: 1.7134961e+10 (resolved)
-
-Stats on memory usage (in Megabytes):
- 9814.374 equivalent memory usage for states (stored*(State-vector + overhead))
- 4243.430 actual memory usage for states (compression: 43.24%)
- state-vector as stored = 14 byte + 36 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 5212.276 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 606546 5194 3779 2 1 ]
-unreached in proctype urcu_reader
- line 267, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 275, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 104, "(1)"
- line 248, "pan.___", state 112, "(1)"
- line 252, "pan.___", state 124, "(1)"
- line 256, "pan.___", state 132, "(1)"
- line 406, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 223, "(1)"
- line 433, "pan.___", state 253, "(1)"
- line 437, "pan.___", state 266, "(1)"
- line 686, "pan.___", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 406, "pan.___", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 326, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 340, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 359, "(1)"
- line 433, "pan.___", state 389, "(1)"
- line 437, "pan.___", state 402, "(1)"
- line 406, "pan.___", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 455, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 469, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 488, "(1)"
- line 433, "pan.___", state 518, "(1)"
- line 437, "pan.___", state 531, "(1)"
- line 406, "pan.___", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 406, "pan.___", state 556, "(1)"
- line 406, "pan.___", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 406, "pan.___", state 557, "else"
- line 406, "pan.___", state 560, "(1)"
- line 410, "pan.___", state 568, "cache_dirty_urcu_active_readers = 0"
- line 410, "pan.___", state 570, "(1)"
- line 410, "pan.___", state 571, "(cache_dirty_urcu_active_readers)"
- line 410, "pan.___", state 571, "else"
- line 410, "pan.___", state 574, "(1)"
- line 410, "pan.___", state 575, "(1)"
- line 410, "pan.___", state 575, "(1)"
- line 408, "pan.___", state 580, "((i<1))"
- line 408, "pan.___", state 580, "((i>=1))"
- line 415, "pan.___", state 586, "cache_dirty_rcu_ptr = 0"
- line 415, "pan.___", state 588, "(1)"
- line 415, "pan.___", state 589, "(cache_dirty_rcu_ptr)"
- line 415, "pan.___", state 589, "else"
- line 415, "pan.___", state 592, "(1)"
- line 415, "pan.___", state 593, "(1)"
- line 415, "pan.___", state 593, "(1)"
- line 419, "pan.___", state 600, "cache_dirty_rcu_data[i] = 0"
- line 419, "pan.___", state 602, "(1)"
- line 419, "pan.___", state 603, "(cache_dirty_rcu_data[i])"
- line 419, "pan.___", state 603, "else"
- line 419, "pan.___", state 606, "(1)"
- line 419, "pan.___", state 607, "(1)"
- line 419, "pan.___", state 607, "(1)"
- line 417, "pan.___", state 612, "((i<2))"
- line 417, "pan.___", state 612, "((i>=2))"
- line 424, "pan.___", state 619, "(1)"
- line 424, "pan.___", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 424, "pan.___", state 620, "else"
- line 424, "pan.___", state 623, "(1)"
- line 424, "pan.___", state 624, "(1)"
- line 424, "pan.___", state 624, "(1)"
- line 428, "pan.___", state 632, "(1)"
- line 428, "pan.___", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 428, "pan.___", state 633, "else"
- line 428, "pan.___", state 636, "(1)"
- line 428, "pan.___", state 637, "(1)"
- line 428, "pan.___", state 637, "(1)"
- line 426, "pan.___", state 642, "((i<1))"
- line 426, "pan.___", state 642, "((i>=1))"
- line 433, "pan.___", state 649, "(1)"
- line 433, "pan.___", state 650, "(!(cache_dirty_rcu_ptr))"
- line 433, "pan.___", state 650, "else"
- line 433, "pan.___", state 653, "(1)"
- line 433, "pan.___", state 654, "(1)"
- line 433, "pan.___", state 654, "(1)"
- line 437, "pan.___", state 662, "(1)"
- line 437, "pan.___", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 437, "pan.___", state 663, "else"
- line 437, "pan.___", state 666, "(1)"
- line 437, "pan.___", state 667, "(1)"
- line 437, "pan.___", state 667, "(1)"
- line 435, "pan.___", state 672, "((i<2))"
- line 435, "pan.___", state 672, "((i>=2))"
- line 445, "pan.___", state 676, "(1)"
- line 445, "pan.___", state 676, "(1)"
- line 686, "pan.___", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 686, "pan.___", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 686, "pan.___", state 681, "(1)"
- line 406, "pan.___", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 720, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 734, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 753, "(1)"
- line 433, "pan.___", state 783, "(1)"
- line 437, "pan.___", state 796, "(1)"
- line 406, "pan.___", state 824, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 856, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 870, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 889, "(1)"
- line 433, "pan.___", state 919, "(1)"
- line 437, "pan.___", state 932, "(1)"
- line 406, "pan.___", state 953, "cache_dirty_urcu_gp_ctr = 0"
- line 406, "pan.___", state 955, "(1)"
- line 406, "pan.___", state 956, "(cache_dirty_urcu_gp_ctr)"
- line 406, "pan.___", state 956, "else"
- line 406, "pan.___", state 959, "(1)"
- line 410, "pan.___", state 967, "cache_dirty_urcu_active_readers = 0"
- line 410, "pan.___", state 969, "(1)"
- line 410, "pan.___", state 970, "(cache_dirty_urcu_active_readers)"
- line 410, "pan.___", state 970, "else"
- line 410, "pan.___", state 973, "(1)"
- line 410, "pan.___", state 974, "(1)"
- line 410, "pan.___", state 974, "(1)"
- line 408, "pan.___", state 979, "((i<1))"
- line 408, "pan.___", state 979, "((i>=1))"
- line 415, "pan.___", state 985, "cache_dirty_rcu_ptr = 0"
- line 415, "pan.___", state 987, "(1)"
- line 415, "pan.___", state 988, "(cache_dirty_rcu_ptr)"
- line 415, "pan.___", state 988, "else"
- line 415, "pan.___", state 991, "(1)"
- line 415, "pan.___", state 992, "(1)"
- line 415, "pan.___", state 992, "(1)"
- line 419, "pan.___", state 999, "cache_dirty_rcu_data[i] = 0"
- line 419, "pan.___", state 1001, "(1)"
- line 419, "pan.___", state 1002, "(cache_dirty_rcu_data[i])"
- line 419, "pan.___", state 1002, "else"
- line 419, "pan.___", state 1005, "(1)"
- line 419, "pan.___", state 1006, "(1)"
- line 419, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1011, "((i<2))"
- line 417, "pan.___", state 1011, "((i>=2))"
- line 424, "pan.___", state 1018, "(1)"
- line 424, "pan.___", state 1019, "(!(cache_dirty_urcu_gp_ctr))"
- line 424, "pan.___", state 1019, "else"
- line 424, "pan.___", state 1022, "(1)"
- line 424, "pan.___", state 1023, "(1)"
- line 424, "pan.___", state 1023, "(1)"
- line 428, "pan.___", state 1031, "(1)"
- line 428, "pan.___", state 1032, "(!(cache_dirty_urcu_active_readers))"
- line 428, "pan.___", state 1032, "else"
- line 428, "pan.___", state 1035, "(1)"
- line 428, "pan.___", state 1036, "(1)"
- line 428, "pan.___", state 1036, "(1)"
- line 426, "pan.___", state 1041, "((i<1))"
- line 426, "pan.___", state 1041, "((i>=1))"
- line 433, "pan.___", state 1048, "(1)"
- line 433, "pan.___", state 1049, "(!(cache_dirty_rcu_ptr))"
- line 433, "pan.___", state 1049, "else"
- line 433, "pan.___", state 1052, "(1)"
- line 433, "pan.___", state 1053, "(1)"
- line 433, "pan.___", state 1053, "(1)"
- line 437, "pan.___", state 1061, "(1)"
- line 437, "pan.___", state 1062, "(!(cache_dirty_rcu_data[i]))"
- line 437, "pan.___", state 1062, "else"
- line 437, "pan.___", state 1065, "(1)"
- line 437, "pan.___", state 1066, "(1)"
- line 437, "pan.___", state 1066, "(1)"
- line 435, "pan.___", state 1071, "((i<2))"
- line 435, "pan.___", state 1071, "((i>=2))"
- line 445, "pan.___", state 1075, "(1)"
- line 445, "pan.___", state 1075, "(1)"
- line 694, "pan.___", state 1079, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 406, "pan.___", state 1084, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1116, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1130, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1149, "(1)"
- line 433, "pan.___", state 1179, "(1)"
- line 437, "pan.___", state 1192, "(1)"
- line 406, "pan.___", state 1216, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1248, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1262, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1281, "(1)"
- line 433, "pan.___", state 1311, "(1)"
- line 437, "pan.___", state 1324, "(1)"
- line 406, "pan.___", state 1349, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1381, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1395, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1414, "(1)"
- line 433, "pan.___", state 1444, "(1)"
- line 437, "pan.___", state 1457, "(1)"
- line 406, "pan.___", state 1478, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1510, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1524, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1543, "(1)"
- line 433, "pan.___", state 1573, "(1)"
- line 437, "pan.___", state 1586, "(1)"
- line 406, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1644, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1658, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1677, "(1)"
- line 433, "pan.___", state 1707, "(1)"
- line 437, "pan.___", state 1720, "(1)"
- line 406, "pan.___", state 1741, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1773, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1787, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1806, "(1)"
- line 433, "pan.___", state 1836, "(1)"
- line 437, "pan.___", state 1849, "(1)"
- line 406, "pan.___", state 1873, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 1905, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 1919, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 1938, "(1)"
- line 433, "pan.___", state 1968, "(1)"
- line 437, "pan.___", state 1981, "(1)"
- line 733, "pan.___", state 2002, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 406, "pan.___", state 2009, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 2041, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 2055, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 2074, "(1)"
- line 433, "pan.___", state 2104, "(1)"
- line 437, "pan.___", state 2117, "(1)"
- line 406, "pan.___", state 2138, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 2170, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 2184, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 2203, "(1)"
- line 433, "pan.___", state 2233, "(1)"
- line 437, "pan.___", state 2246, "(1)"
- line 406, "pan.___", state 2269, "cache_dirty_urcu_gp_ctr = 0"
- line 406, "pan.___", state 2271, "(1)"
- line 406, "pan.___", state 2272, "(cache_dirty_urcu_gp_ctr)"
- line 406, "pan.___", state 2272, "else"
- line 406, "pan.___", state 2275, "(1)"
- line 410, "pan.___", state 2283, "cache_dirty_urcu_active_readers = 0"
- line 410, "pan.___", state 2285, "(1)"
- line 410, "pan.___", state 2286, "(cache_dirty_urcu_active_readers)"
- line 410, "pan.___", state 2286, "else"
- line 410, "pan.___", state 2289, "(1)"
- line 410, "pan.___", state 2290, "(1)"
- line 410, "pan.___", state 2290, "(1)"
- line 408, "pan.___", state 2295, "((i<1))"
- line 408, "pan.___", state 2295, "((i>=1))"
- line 415, "pan.___", state 2301, "cache_dirty_rcu_ptr = 0"
- line 415, "pan.___", state 2303, "(1)"
- line 415, "pan.___", state 2304, "(cache_dirty_rcu_ptr)"
- line 415, "pan.___", state 2304, "else"
- line 415, "pan.___", state 2307, "(1)"
- line 415, "pan.___", state 2308, "(1)"
- line 415, "pan.___", state 2308, "(1)"
- line 419, "pan.___", state 2315, "cache_dirty_rcu_data[i] = 0"
- line 419, "pan.___", state 2317, "(1)"
- line 419, "pan.___", state 2318, "(cache_dirty_rcu_data[i])"
- line 419, "pan.___", state 2318, "else"
- line 419, "pan.___", state 2321, "(1)"
- line 419, "pan.___", state 2322, "(1)"
- line 419, "pan.___", state 2322, "(1)"
- line 417, "pan.___", state 2327, "((i<2))"
- line 417, "pan.___", state 2327, "((i>=2))"
- line 424, "pan.___", state 2334, "(1)"
- line 424, "pan.___", state 2335, "(!(cache_dirty_urcu_gp_ctr))"
- line 424, "pan.___", state 2335, "else"
- line 424, "pan.___", state 2338, "(1)"
- line 424, "pan.___", state 2339, "(1)"
- line 424, "pan.___", state 2339, "(1)"
- line 428, "pan.___", state 2347, "(1)"
- line 428, "pan.___", state 2348, "(!(cache_dirty_urcu_active_readers))"
- line 428, "pan.___", state 2348, "else"
- line 428, "pan.___", state 2351, "(1)"
- line 428, "pan.___", state 2352, "(1)"
- line 428, "pan.___", state 2352, "(1)"
- line 426, "pan.___", state 2357, "((i<1))"
- line 426, "pan.___", state 2357, "((i>=1))"
- line 433, "pan.___", state 2364, "(1)"
- line 433, "pan.___", state 2365, "(!(cache_dirty_rcu_ptr))"
- line 433, "pan.___", state 2365, "else"
- line 433, "pan.___", state 2368, "(1)"
- line 433, "pan.___", state 2369, "(1)"
- line 433, "pan.___", state 2369, "(1)"
- line 437, "pan.___", state 2377, "(1)"
- line 437, "pan.___", state 2378, "(!(cache_dirty_rcu_data[i]))"
- line 437, "pan.___", state 2378, "else"
- line 437, "pan.___", state 2381, "(1)"
- line 437, "pan.___", state 2382, "(1)"
- line 437, "pan.___", state 2382, "(1)"
- line 435, "pan.___", state 2387, "((i<2))"
- line 435, "pan.___", state 2387, "((i>=2))"
- line 445, "pan.___", state 2391, "(1)"
- line 445, "pan.___", state 2391, "(1)"
- line 733, "pan.___", state 2394, "cached_urcu_active_readers = (tmp+1)"
- line 733, "pan.___", state 2395, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 733, "pan.___", state 2396, "(1)"
- line 406, "pan.___", state 2403, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 2435, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 2449, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 2468, "(1)"
- line 433, "pan.___", state 2498, "(1)"
- line 437, "pan.___", state 2511, "(1)"
- line 406, "pan.___", state 2538, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 2570, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 2584, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 2603, "(1)"
- line 433, "pan.___", state 2633, "(1)"
- line 437, "pan.___", state 2646, "(1)"
- line 406, "pan.___", state 2667, "cache_dirty_urcu_gp_ctr = 0"
- line 415, "pan.___", state 2699, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 2713, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 2732, "(1)"
- line 433, "pan.___", state 2762, "(1)"
- line 437, "pan.___", state 2775, "(1)"
- line 244, "pan.___", state 2808, "(1)"
- line 252, "pan.___", state 2828, "(1)"
- line 256, "pan.___", state 2836, "(1)"
- line 244, "pan.___", state 2851, "(1)"
- line 252, "pan.___", state 2871, "(1)"
- line 256, "pan.___", state 2879, "(1)"
- line 928, "pan.___", state 2896, "-end-"
- (245 of 2896 states)
-unreached in proctype urcu_writer
- line 406, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 410, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 415, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 424, "pan.___", state 110, "(1)"
- line 428, "pan.___", state 123, "(1)"
- line 433, "pan.___", state 140, "(1)"
- line 267, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 406, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 410, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 415, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 424, "pan.___", state 303, "(1)"
- line 428, "pan.___", state 316, "(1)"
- line 433, "pan.___", state 333, "(1)"
- line 437, "pan.___", state 346, "(1)"
- line 410, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 415, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 428, "pan.___", state 447, "(1)"
- line 433, "pan.___", state 464, "(1)"
- line 437, "pan.___", state 477, "(1)"
- line 410, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 415, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 428, "pan.___", state 586, "(1)"
- line 433, "pan.___", state 603, "(1)"
- line 437, "pan.___", state 616, "(1)"
- line 410, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 415, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 428, "pan.___", state 715, "(1)"
- line 433, "pan.___", state 732, "(1)"
- line 437, "pan.___", state 745, "(1)"
- line 410, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 415, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 419, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 428, "pan.___", state 846, "(1)"
- line 433, "pan.___", state 863, "(1)"
- line 437, "pan.___", state 876, "(1)"
- line 267, "pan.___", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 940, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 955, "(1)"
- line 279, "pan.___", state 962, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 978, "(1)"
- line 248, "pan.___", state 986, "(1)"
- line 252, "pan.___", state 998, "(1)"
- line 256, "pan.___", state 1006, "(1)"
- line 267, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1059, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1084, "(1)"
- line 248, "pan.___", state 1092, "(1)"
- line 252, "pan.___", state 1104, "(1)"
- line 256, "pan.___", state 1112, "(1)"
- line 271, "pan.___", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1151, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1176, "(1)"
- line 248, "pan.___", state 1184, "(1)"
- line 252, "pan.___", state 1196, "(1)"
- line 256, "pan.___", state 1204, "(1)"
- line 267, "pan.___", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1257, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1282, "(1)"
- line 248, "pan.___", state 1290, "(1)"
- line 252, "pan.___", state 1302, "(1)"
- line 256, "pan.___", state 1310, "(1)"
- line 271, "pan.___", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1349, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1374, "(1)"
- line 248, "pan.___", state 1382, "(1)"
- line 252, "pan.___", state 1394, "(1)"
- line 256, "pan.___", state 1402, "(1)"
- line 267, "pan.___", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1455, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1480, "(1)"
- line 248, "pan.___", state 1488, "(1)"
- line 252, "pan.___", state 1500, "(1)"
- line 256, "pan.___", state 1508, "(1)"
- line 271, "pan.___", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1547, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1572, "(1)"
- line 248, "pan.___", state 1580, "(1)"
- line 252, "pan.___", state 1592, "(1)"
- line 256, "pan.___", state 1600, "(1)"
- line 267, "pan.___", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 271, "pan.___", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 275, "pan.___", state 1653, "cache_dirty_rcu_ptr = 0"
- line 279, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 244, "pan.___", state 1678, "(1)"
- line 248, "pan.___", state 1686, "(1)"
- line 252, "pan.___", state 1698, "(1)"
- line 256, "pan.___", state 1706, "(1)"
- line 1303, "pan.___", state 1722, "-end-"
- (103 of 1722 states)
-unreached in proctype :init:
- (0 of 28 states)
-unreached in proctype :never:
- line 1366, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 5.15e+04 seconds
-pan: rate 1721.7944 states/second
-pan: avg transition delay 1.5843e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-Depth= 9193 States= 1e+06 Transitions= 2.02e+08 Memory= 513.615 t= 308 R= 3e+03
-Depth= 9193 States= 2e+06 Transitions= 4.02e+08 Memory= 560.100 t= 617 R= 3e+03
-pan: claim violated! (at depth 1482)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 9193, errors: 1
- 2638623 states, stored
-5.0906949e+08 states, matched
-5.1170812e+08 transitions (= stored+matched)
-2.7495835e+09 atomic steps
-hash conflicts: 3.3187407e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 291.901 equivalent memory usage for states (stored*(State-vector + overhead))
- 123.793 actual memory usage for states (compression: 42.41%)
- state-vector as stored = 13 byte + 36 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 589.494 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 39337 2870 221 2 2 ]
-unreached in proctype urcu_reader
- line 894, "pan.___", state 12, "((i<1))"
- line 894, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 61, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 83, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 92, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 108, "(1)"
- line 249, "pan.___", state 116, "(1)"
- line 253, "pan.___", state 128, "(1)"
- line 257, "pan.___", state 136, "(1)"
- line 407, "pan.___", state 162, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 194, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 208, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 227, "(1)"
- line 434, "pan.___", state 257, "(1)"
- line 438, "pan.___", state 270, "(1)"
- line 696, "pan.___", state 291, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 298, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 330, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 344, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 363, "(1)"
- line 434, "pan.___", state 393, "(1)"
- line 438, "pan.___", state 406, "(1)"
- line 407, "pan.___", state 427, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 459, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 473, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 492, "(1)"
- line 434, "pan.___", state 522, "(1)"
- line 438, "pan.___", state 535, "(1)"
- line 407, "pan.___", state 558, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 560, "(1)"
- line 407, "pan.___", state 561, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 561, "else"
- line 407, "pan.___", state 564, "(1)"
- line 411, "pan.___", state 572, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 574, "(1)"
- line 411, "pan.___", state 575, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 575, "else"
- line 411, "pan.___", state 578, "(1)"
- line 411, "pan.___", state 579, "(1)"
- line 411, "pan.___", state 579, "(1)"
- line 409, "pan.___", state 584, "((i<1))"
- line 409, "pan.___", state 584, "((i>=1))"
- line 416, "pan.___", state 590, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 592, "(1)"
- line 416, "pan.___", state 593, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 593, "else"
- line 416, "pan.___", state 596, "(1)"
- line 416, "pan.___", state 597, "(1)"
- line 416, "pan.___", state 597, "(1)"
- line 420, "pan.___", state 604, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 606, "(1)"
- line 420, "pan.___", state 607, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 607, "else"
- line 420, "pan.___", state 610, "(1)"
- line 420, "pan.___", state 611, "(1)"
- line 420, "pan.___", state 611, "(1)"
- line 418, "pan.___", state 616, "((i<2))"
- line 418, "pan.___", state 616, "((i>=2))"
- line 425, "pan.___", state 623, "(1)"
- line 425, "pan.___", state 624, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 624, "else"
- line 425, "pan.___", state 627, "(1)"
- line 425, "pan.___", state 628, "(1)"
- line 425, "pan.___", state 628, "(1)"
- line 429, "pan.___", state 636, "(1)"
- line 429, "pan.___", state 637, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 637, "else"
- line 429, "pan.___", state 640, "(1)"
- line 429, "pan.___", state 641, "(1)"
- line 429, "pan.___", state 641, "(1)"
- line 427, "pan.___", state 646, "((i<1))"
- line 427, "pan.___", state 646, "((i>=1))"
- line 434, "pan.___", state 653, "(1)"
- line 434, "pan.___", state 654, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 654, "else"
- line 434, "pan.___", state 657, "(1)"
- line 434, "pan.___", state 658, "(1)"
- line 434, "pan.___", state 658, "(1)"
- line 438, "pan.___", state 666, "(1)"
- line 438, "pan.___", state 667, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 667, "else"
- line 438, "pan.___", state 670, "(1)"
- line 438, "pan.___", state 671, "(1)"
- line 438, "pan.___", state 671, "(1)"
- line 436, "pan.___", state 676, "((i<2))"
- line 436, "pan.___", state 676, "((i>=2))"
- line 446, "pan.___", state 680, "(1)"
- line 446, "pan.___", state 680, "(1)"
- line 696, "pan.___", state 683, "cached_urcu_active_readers = (tmp+1)"
- line 696, "pan.___", state 684, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 696, "pan.___", state 685, "(1)"
- line 407, "pan.___", state 692, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 724, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 738, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 757, "(1)"
- line 434, "pan.___", state 787, "(1)"
- line 438, "pan.___", state 800, "(1)"
- line 407, "pan.___", state 828, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 860, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 874, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 893, "(1)"
- line 434, "pan.___", state 923, "(1)"
- line 438, "pan.___", state 936, "(1)"
- line 407, "pan.___", state 957, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 959, "(1)"
- line 407, "pan.___", state 960, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 960, "else"
- line 407, "pan.___", state 963, "(1)"
- line 411, "pan.___", state 971, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 973, "(1)"
- line 411, "pan.___", state 974, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 974, "else"
- line 411, "pan.___", state 977, "(1)"
- line 411, "pan.___", state 978, "(1)"
- line 411, "pan.___", state 978, "(1)"
- line 409, "pan.___", state 983, "((i<1))"
- line 409, "pan.___", state 983, "((i>=1))"
- line 416, "pan.___", state 989, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 991, "(1)"
- line 416, "pan.___", state 992, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 992, "else"
- line 416, "pan.___", state 995, "(1)"
- line 416, "pan.___", state 996, "(1)"
- line 416, "pan.___", state 996, "(1)"
- line 420, "pan.___", state 1003, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 1005, "(1)"
- line 420, "pan.___", state 1006, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 1006, "else"
- line 420, "pan.___", state 1009, "(1)"
- line 420, "pan.___", state 1010, "(1)"
- line 420, "pan.___", state 1010, "(1)"
- line 418, "pan.___", state 1015, "((i<2))"
- line 418, "pan.___", state 1015, "((i>=2))"
- line 425, "pan.___", state 1022, "(1)"
- line 425, "pan.___", state 1023, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 1023, "else"
- line 425, "pan.___", state 1026, "(1)"
- line 425, "pan.___", state 1027, "(1)"
- line 425, "pan.___", state 1027, "(1)"
- line 429, "pan.___", state 1035, "(1)"
- line 429, "pan.___", state 1036, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 1036, "else"
- line 429, "pan.___", state 1039, "(1)"
- line 429, "pan.___", state 1040, "(1)"
- line 429, "pan.___", state 1040, "(1)"
- line 427, "pan.___", state 1045, "((i<1))"
- line 427, "pan.___", state 1045, "((i>=1))"
- line 434, "pan.___", state 1052, "(1)"
- line 434, "pan.___", state 1053, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 1053, "else"
- line 434, "pan.___", state 1056, "(1)"
- line 434, "pan.___", state 1057, "(1)"
- line 434, "pan.___", state 1057, "(1)"
- line 438, "pan.___", state 1065, "(1)"
- line 438, "pan.___", state 1066, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 1066, "else"
- line 438, "pan.___", state 1069, "(1)"
- line 438, "pan.___", state 1070, "(1)"
- line 438, "pan.___", state 1070, "(1)"
- line 436, "pan.___", state 1075, "((i<2))"
- line 436, "pan.___", state 1075, "((i>=2))"
- line 446, "pan.___", state 1079, "(1)"
- line 446, "pan.___", state 1079, "(1)"
- line 704, "pan.___", state 1083, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 1088, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1120, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1134, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1153, "(1)"
- line 434, "pan.___", state 1183, "(1)"
- line 438, "pan.___", state 1196, "(1)"
- line 407, "pan.___", state 1220, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1252, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1285, "(1)"
- line 434, "pan.___", state 1315, "(1)"
- line 438, "pan.___", state 1328, "(1)"
- line 407, "pan.___", state 1353, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1385, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1399, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1418, "(1)"
- line 434, "pan.___", state 1448, "(1)"
- line 438, "pan.___", state 1461, "(1)"
- line 407, "pan.___", state 1482, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1514, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1528, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1547, "(1)"
- line 434, "pan.___", state 1577, "(1)"
- line 438, "pan.___", state 1590, "(1)"
- line 407, "pan.___", state 1616, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1648, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1681, "(1)"
- line 434, "pan.___", state 1711, "(1)"
- line 438, "pan.___", state 1724, "(1)"
- line 407, "pan.___", state 1745, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1777, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1791, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1810, "(1)"
- line 434, "pan.___", state 1840, "(1)"
- line 438, "pan.___", state 1853, "(1)"
- line 407, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1909, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1923, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1942, "(1)"
- line 434, "pan.___", state 1972, "(1)"
- line 438, "pan.___", state 1985, "(1)"
- line 743, "pan.___", state 2006, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 2013, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2045, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2059, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2078, "(1)"
- line 434, "pan.___", state 2108, "(1)"
- line 438, "pan.___", state 2121, "(1)"
- line 407, "pan.___", state 2142, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2174, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2188, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2207, "(1)"
- line 434, "pan.___", state 2237, "(1)"
- line 438, "pan.___", state 2250, "(1)"
- line 407, "pan.___", state 2273, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 2275, "(1)"
- line 407, "pan.___", state 2276, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 2276, "else"
- line 407, "pan.___", state 2279, "(1)"
- line 411, "pan.___", state 2287, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 2289, "(1)"
- line 411, "pan.___", state 2290, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 2290, "else"
- line 411, "pan.___", state 2293, "(1)"
- line 411, "pan.___", state 2294, "(1)"
- line 411, "pan.___", state 2294, "(1)"
- line 409, "pan.___", state 2299, "((i<1))"
- line 409, "pan.___", state 2299, "((i>=1))"
- line 416, "pan.___", state 2305, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2307, "(1)"
- line 416, "pan.___", state 2308, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2308, "else"
- line 416, "pan.___", state 2311, "(1)"
- line 416, "pan.___", state 2312, "(1)"
- line 416, "pan.___", state 2312, "(1)"
- line 420, "pan.___", state 2319, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2321, "(1)"
- line 420, "pan.___", state 2322, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2322, "else"
- line 420, "pan.___", state 2325, "(1)"
- line 420, "pan.___", state 2326, "(1)"
- line 420, "pan.___", state 2326, "(1)"
- line 418, "pan.___", state 2331, "((i<2))"
- line 418, "pan.___", state 2331, "((i>=2))"
- line 425, "pan.___", state 2338, "(1)"
- line 425, "pan.___", state 2339, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 2339, "else"
- line 425, "pan.___", state 2342, "(1)"
- line 425, "pan.___", state 2343, "(1)"
- line 425, "pan.___", state 2343, "(1)"
- line 429, "pan.___", state 2351, "(1)"
- line 429, "pan.___", state 2352, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 2352, "else"
- line 429, "pan.___", state 2355, "(1)"
- line 429, "pan.___", state 2356, "(1)"
- line 429, "pan.___", state 2356, "(1)"
- line 427, "pan.___", state 2361, "((i<1))"
- line 427, "pan.___", state 2361, "((i>=1))"
- line 434, "pan.___", state 2368, "(1)"
- line 434, "pan.___", state 2369, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 2369, "else"
- line 434, "pan.___", state 2372, "(1)"
- line 434, "pan.___", state 2373, "(1)"
- line 434, "pan.___", state 2373, "(1)"
- line 438, "pan.___", state 2381, "(1)"
- line 438, "pan.___", state 2382, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 2382, "else"
- line 438, "pan.___", state 2385, "(1)"
- line 438, "pan.___", state 2386, "(1)"
- line 438, "pan.___", state 2386, "(1)"
- line 436, "pan.___", state 2391, "((i<2))"
- line 436, "pan.___", state 2391, "((i>=2))"
- line 446, "pan.___", state 2395, "(1)"
- line 446, "pan.___", state 2395, "(1)"
- line 743, "pan.___", state 2398, "cached_urcu_active_readers = (tmp+1)"
- line 743, "pan.___", state 2399, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 743, "pan.___", state 2400, "(1)"
- line 407, "pan.___", state 2407, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2439, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2453, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2472, "(1)"
- line 434, "pan.___", state 2502, "(1)"
- line 438, "pan.___", state 2515, "(1)"
- line 407, "pan.___", state 2542, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2574, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2588, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2607, "(1)"
- line 434, "pan.___", state 2637, "(1)"
- line 438, "pan.___", state 2650, "(1)"
- line 407, "pan.___", state 2671, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2703, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2717, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2736, "(1)"
- line 434, "pan.___", state 2766, "(1)"
- line 438, "pan.___", state 2779, "(1)"
- line 245, "pan.___", state 2812, "(1)"
- line 253, "pan.___", state 2832, "(1)"
- line 257, "pan.___", state 2840, "(1)"
- line 245, "pan.___", state 2855, "(1)"
- line 253, "pan.___", state 2875, "(1)"
- line 257, "pan.___", state 2883, "(1)"
- line 929, "pan.___", state 2900, "-end-"
- (246 of 2900 states)
-unreached in proctype urcu_writer
- line 1018, "pan.___", state 12, "((i<1))"
- line 1018, "pan.___", state 12, "((i>=1))"
- line 407, "pan.___", state 47, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 53, "(1)"
- line 411, "pan.___", state 61, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 67, "(1)"
- line 411, "pan.___", state 68, "(1)"
- line 411, "pan.___", state 68, "(1)"
- line 409, "pan.___", state 73, "((i<1))"
- line 409, "pan.___", state 73, "((i>=1))"
- line 416, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 85, "(1)"
- line 416, "pan.___", state 86, "(1)"
- line 416, "pan.___", state 86, "(1)"
- line 420, "pan.___", state 99, "(1)"
- line 420, "pan.___", state 100, "(1)"
- line 420, "pan.___", state 100, "(1)"
- line 418, "pan.___", state 105, "((i<2))"
- line 418, "pan.___", state 105, "((i>=2))"
- line 425, "pan.___", state 112, "(1)"
- line 425, "pan.___", state 113, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 113, "else"
- line 425, "pan.___", state 116, "(1)"
- line 425, "pan.___", state 117, "(1)"
- line 425, "pan.___", state 117, "(1)"
- line 429, "pan.___", state 125, "(1)"
- line 429, "pan.___", state 126, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 126, "else"
- line 429, "pan.___", state 129, "(1)"
- line 429, "pan.___", state 130, "(1)"
- line 429, "pan.___", state 130, "(1)"
- line 427, "pan.___", state 135, "((i<1))"
- line 427, "pan.___", state 135, "((i>=1))"
- line 434, "pan.___", state 142, "(1)"
- line 434, "pan.___", state 143, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 143, "else"
- line 434, "pan.___", state 146, "(1)"
- line 434, "pan.___", state 147, "(1)"
- line 434, "pan.___", state 147, "(1)"
- line 438, "pan.___", state 155, "(1)"
- line 438, "pan.___", state 156, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 156, "else"
- line 438, "pan.___", state 159, "(1)"
- line 438, "pan.___", state 160, "(1)"
- line 438, "pan.___", state 160, "(1)"
- line 436, "pan.___", state 165, "((i<2))"
- line 436, "pan.___", state 165, "((i>=2))"
- line 446, "pan.___", state 169, "(1)"
- line 446, "pan.___", state 169, "(1)"
- line 268, "pan.___", state 178, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 187, "cache_dirty_urcu_active_readers = 0"
- line 270, "pan.___", state 195, "((i<1))"
- line 270, "pan.___", state 195, "((i>=1))"
- line 276, "pan.___", state 200, "cache_dirty_rcu_ptr = 0"
- line 1088, "pan.___", state 228, "old_data = cached_rcu_ptr"
- line 1099, "pan.___", state 232, "_proc_urcu_writer = (_proc_urcu_writer|(1<<4))"
- line 407, "pan.___", state 240, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 246, "(1)"
- line 411, "pan.___", state 254, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 260, "(1)"
- line 411, "pan.___", state 261, "(1)"
- line 411, "pan.___", state 261, "(1)"
- line 409, "pan.___", state 266, "((i<1))"
- line 409, "pan.___", state 266, "((i>=1))"
- line 416, "pan.___", state 274, "(1)"
- line 416, "pan.___", state 275, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 275, "else"
- line 416, "pan.___", state 278, "(1)"
- line 416, "pan.___", state 279, "(1)"
- line 416, "pan.___", state 279, "(1)"
- line 420, "pan.___", state 286, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 292, "(1)"
- line 420, "pan.___", state 293, "(1)"
- line 420, "pan.___", state 293, "(1)"
- line 418, "pan.___", state 298, "((i<2))"
- line 418, "pan.___", state 298, "((i>=2))"
- line 425, "pan.___", state 305, "(1)"
- line 425, "pan.___", state 306, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 306, "else"
- line 425, "pan.___", state 309, "(1)"
- line 425, "pan.___", state 310, "(1)"
- line 425, "pan.___", state 310, "(1)"
- line 429, "pan.___", state 318, "(1)"
- line 429, "pan.___", state 319, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 319, "else"
- line 429, "pan.___", state 322, "(1)"
- line 429, "pan.___", state 323, "(1)"
- line 429, "pan.___", state 323, "(1)"
- line 427, "pan.___", state 328, "((i<1))"
- line 427, "pan.___", state 328, "((i>=1))"
- line 434, "pan.___", state 335, "(1)"
- line 434, "pan.___", state 336, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 336, "else"
- line 434, "pan.___", state 339, "(1)"
- line 434, "pan.___", state 340, "(1)"
- line 434, "pan.___", state 340, "(1)"
- line 438, "pan.___", state 348, "(1)"
- line 438, "pan.___", state 349, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 349, "else"
- line 438, "pan.___", state 352, "(1)"
- line 438, "pan.___", state 353, "(1)"
- line 438, "pan.___", state 353, "(1)"
- line 436, "pan.___", state 358, "((i<2))"
- line 436, "pan.___", state 358, "((i>=2))"
- line 446, "pan.___", state 362, "(1)"
- line 446, "pan.___", state 362, "(1)"
- line 407, "pan.___", state 373, "(1)"
- line 407, "pan.___", state 374, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 374, "else"
- line 407, "pan.___", state 377, "(1)"
- line 411, "pan.___", state 385, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 391, "(1)"
- line 411, "pan.___", state 392, "(1)"
- line 411, "pan.___", state 392, "(1)"
- line 409, "pan.___", state 397, "((i<1))"
- line 409, "pan.___", state 397, "((i>=1))"
- line 416, "pan.___", state 403, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 409, "(1)"
- line 416, "pan.___", state 410, "(1)"
- line 416, "pan.___", state 410, "(1)"
- line 420, "pan.___", state 417, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 423, "(1)"
- line 420, "pan.___", state 424, "(1)"
- line 420, "pan.___", state 424, "(1)"
- line 418, "pan.___", state 429, "((i<2))"
- line 418, "pan.___", state 429, "((i>=2))"
- line 425, "pan.___", state 436, "(1)"
- line 425, "pan.___", state 437, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 437, "else"
- line 425, "pan.___", state 440, "(1)"
- line 425, "pan.___", state 441, "(1)"
- line 425, "pan.___", state 441, "(1)"
- line 429, "pan.___", state 449, "(1)"
- line 429, "pan.___", state 450, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 450, "else"
- line 429, "pan.___", state 453, "(1)"
- line 429, "pan.___", state 454, "(1)"
- line 429, "pan.___", state 454, "(1)"
- line 427, "pan.___", state 459, "((i<1))"
- line 427, "pan.___", state 459, "((i>=1))"
- line 434, "pan.___", state 466, "(1)"
- line 434, "pan.___", state 467, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 467, "else"
- line 434, "pan.___", state 470, "(1)"
- line 434, "pan.___", state 471, "(1)"
- line 434, "pan.___", state 471, "(1)"
- line 438, "pan.___", state 479, "(1)"
- line 438, "pan.___", state 480, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 480, "else"
- line 438, "pan.___", state 483, "(1)"
- line 438, "pan.___", state 484, "(1)"
- line 438, "pan.___", state 484, "(1)"
- line 436, "pan.___", state 489, "((i<2))"
- line 436, "pan.___", state 489, "((i>=2))"
- line 446, "pan.___", state 493, "(1)"
- line 446, "pan.___", state 493, "(1)"
- line 1153, "pan.___", state 504, "_proc_urcu_writer = (_proc_urcu_writer&~((1<<9)))"
- line 1158, "pan.___", state 505, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<8)|(1<<7))))"
- line 407, "pan.___", state 510, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 516, "(1)"
- line 411, "pan.___", state 524, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 530, "(1)"
- line 411, "pan.___", state 531, "(1)"
- line 411, "pan.___", state 531, "(1)"
- line 409, "pan.___", state 536, "((i<1))"
- line 409, "pan.___", state 536, "((i>=1))"
- line 416, "pan.___", state 542, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 548, "(1)"
- line 416, "pan.___", state 549, "(1)"
- line 416, "pan.___", state 549, "(1)"
- line 420, "pan.___", state 556, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 562, "(1)"
- line 420, "pan.___", state 563, "(1)"
- line 420, "pan.___", state 563, "(1)"
- line 418, "pan.___", state 568, "((i<2))"
- line 418, "pan.___", state 568, "((i>=2))"
- line 425, "pan.___", state 575, "(1)"
- line 425, "pan.___", state 576, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 576, "else"
- line 425, "pan.___", state 579, "(1)"
- line 425, "pan.___", state 580, "(1)"
- line 425, "pan.___", state 580, "(1)"
- line 429, "pan.___", state 588, "(1)"
- line 429, "pan.___", state 589, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 589, "else"
- line 429, "pan.___", state 592, "(1)"
- line 429, "pan.___", state 593, "(1)"
- line 429, "pan.___", state 593, "(1)"
- line 427, "pan.___", state 598, "((i<1))"
- line 427, "pan.___", state 598, "((i>=1))"
- line 434, "pan.___", state 605, "(1)"
- line 434, "pan.___", state 606, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 606, "else"
- line 434, "pan.___", state 609, "(1)"
- line 434, "pan.___", state 610, "(1)"
- line 434, "pan.___", state 610, "(1)"
- line 438, "pan.___", state 618, "(1)"
- line 438, "pan.___", state 619, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 619, "else"
- line 438, "pan.___", state 622, "(1)"
- line 438, "pan.___", state 623, "(1)"
- line 438, "pan.___", state 623, "(1)"
- line 446, "pan.___", state 632, "(1)"
- line 446, "pan.___", state 632, "(1)"
- line 407, "pan.___", state 639, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 653, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 671, "cache_dirty_rcu_ptr = 0"
- line 425, "pan.___", state 704, "(1)"
- line 429, "pan.___", state 717, "(1)"
- line 434, "pan.___", state 734, "(1)"
- line 438, "pan.___", state 747, "(1)"
- line 411, "pan.___", state 784, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 802, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 816, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 848, "(1)"
- line 434, "pan.___", state 865, "(1)"
- line 438, "pan.___", state 878, "(1)"
- line 1235, "pan.___", state 905, "_proc_urcu_writer = (_proc_urcu_writer|(1<<13))"
- line 268, "pan.___", state 933, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 935, "(1)"
- line 272, "pan.___", state 942, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 944, "(1)"
- line 272, "pan.___", state 945, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 945, "else"
- line 270, "pan.___", state 950, "((i<1))"
- line 270, "pan.___", state 950, "((i>=1))"
- line 276, "pan.___", state 955, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 957, "(1)"
- line 276, "pan.___", state 958, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 958, "else"
- line 280, "pan.___", state 964, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 966, "(1)"
- line 280, "pan.___", state 967, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 967, "else"
- line 278, "pan.___", state 972, "((i<2))"
- line 278, "pan.___", state 972, "((i>=2))"
- line 245, "pan.___", state 980, "(1)"
- line 249, "pan.___", state 988, "(1)"
- line 249, "pan.___", state 989, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 989, "else"
- line 247, "pan.___", state 994, "((i<1))"
- line 247, "pan.___", state 994, "((i>=1))"
- line 253, "pan.___", state 1000, "(1)"
- line 253, "pan.___", state 1001, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1001, "else"
- line 257, "pan.___", state 1008, "(1)"
- line 257, "pan.___", state 1009, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1009, "else"
- line 262, "pan.___", state 1018, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1018, "else"
- line 1289, "pan.___", state 1034, "((i<1))"
- line 1289, "pan.___", state 1034, "((i>=1))"
- line 268, "pan.___", state 1039, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1041, "(1)"
- line 272, "pan.___", state 1048, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1050, "(1)"
- line 272, "pan.___", state 1051, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1051, "else"
- line 270, "pan.___", state 1056, "((i<1))"
- line 270, "pan.___", state 1056, "((i>=1))"
- line 276, "pan.___", state 1061, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1063, "(1)"
- line 276, "pan.___", state 1064, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1064, "else"
- line 280, "pan.___", state 1070, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1072, "(1)"
- line 280, "pan.___", state 1073, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1073, "else"
- line 278, "pan.___", state 1078, "((i<2))"
- line 278, "pan.___", state 1078, "((i>=2))"
- line 245, "pan.___", state 1086, "(1)"
- line 249, "pan.___", state 1094, "(1)"
- line 249, "pan.___", state 1095, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1095, "else"
- line 247, "pan.___", state 1100, "((i<1))"
- line 247, "pan.___", state 1100, "((i>=1))"
- line 253, "pan.___", state 1106, "(1)"
- line 253, "pan.___", state 1107, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1107, "else"
- line 257, "pan.___", state 1114, "(1)"
- line 257, "pan.___", state 1115, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1115, "else"
- line 262, "pan.___", state 1124, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1124, "else"
- line 295, "pan.___", state 1126, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1126, "else"
- line 1289, "pan.___", state 1127, "(cache_dirty_urcu_gp_ctr)"
- line 1289, "pan.___", state 1127, "else"
- line 268, "pan.___", state 1131, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1133, "(1)"
- line 272, "pan.___", state 1140, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1142, "(1)"
- line 272, "pan.___", state 1143, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1143, "else"
- line 270, "pan.___", state 1148, "((i<1))"
- line 270, "pan.___", state 1148, "((i>=1))"
- line 276, "pan.___", state 1153, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1155, "(1)"
- line 276, "pan.___", state 1156, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1156, "else"
- line 280, "pan.___", state 1162, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1164, "(1)"
- line 280, "pan.___", state 1165, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1165, "else"
- line 278, "pan.___", state 1170, "((i<2))"
- line 278, "pan.___", state 1170, "((i>=2))"
- line 245, "pan.___", state 1178, "(1)"
- line 249, "pan.___", state 1186, "(1)"
- line 249, "pan.___", state 1187, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1187, "else"
- line 247, "pan.___", state 1192, "((i<1))"
- line 247, "pan.___", state 1192, "((i>=1))"
- line 253, "pan.___", state 1198, "(1)"
- line 253, "pan.___", state 1199, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1199, "else"
- line 257, "pan.___", state 1206, "(1)"
- line 257, "pan.___", state 1207, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1207, "else"
- line 262, "pan.___", state 1216, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1216, "else"
- line 1293, "pan.___", state 1219, "i = 0"
- line 1293, "pan.___", state 1221, "reader_barrier = 1"
- line 1293, "pan.___", state 1232, "((i<1))"
- line 1293, "pan.___", state 1232, "((i>=1))"
- line 268, "pan.___", state 1237, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1239, "(1)"
- line 272, "pan.___", state 1246, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1248, "(1)"
- line 272, "pan.___", state 1249, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1249, "else"
- line 270, "pan.___", state 1254, "((i<1))"
- line 270, "pan.___", state 1254, "((i>=1))"
- line 276, "pan.___", state 1259, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1261, "(1)"
- line 276, "pan.___", state 1262, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1262, "else"
- line 280, "pan.___", state 1268, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1270, "(1)"
- line 280, "pan.___", state 1271, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1271, "else"
- line 278, "pan.___", state 1276, "((i<2))"
- line 278, "pan.___", state 1276, "((i>=2))"
- line 245, "pan.___", state 1284, "(1)"
- line 249, "pan.___", state 1292, "(1)"
- line 249, "pan.___", state 1293, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1293, "else"
- line 247, "pan.___", state 1298, "((i<1))"
- line 247, "pan.___", state 1298, "((i>=1))"
- line 253, "pan.___", state 1304, "(1)"
- line 253, "pan.___", state 1305, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1305, "else"
- line 257, "pan.___", state 1312, "(1)"
- line 257, "pan.___", state 1313, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1313, "else"
- line 262, "pan.___", state 1322, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1322, "else"
- line 295, "pan.___", state 1324, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1324, "else"
- line 1293, "pan.___", state 1325, "(cache_dirty_urcu_gp_ctr)"
- line 1293, "pan.___", state 1325, "else"
- line 272, "pan.___", state 1338, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1351, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1360, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1376, "(1)"
- line 249, "pan.___", state 1384, "(1)"
- line 253, "pan.___", state 1396, "(1)"
- line 257, "pan.___", state 1404, "(1)"
- line 268, "pan.___", state 1435, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1444, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1457, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1466, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1482, "(1)"
- line 249, "pan.___", state 1490, "(1)"
- line 253, "pan.___", state 1502, "(1)"
- line 257, "pan.___", state 1510, "(1)"
- line 268, "pan.___", state 1527, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1529, "(1)"
- line 272, "pan.___", state 1536, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1538, "(1)"
- line 272, "pan.___", state 1539, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1539, "else"
- line 270, "pan.___", state 1544, "((i<1))"
- line 270, "pan.___", state 1544, "((i>=1))"
- line 276, "pan.___", state 1549, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1551, "(1)"
- line 276, "pan.___", state 1552, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1552, "else"
- line 280, "pan.___", state 1558, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1560, "(1)"
- line 280, "pan.___", state 1561, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1561, "else"
- line 278, "pan.___", state 1566, "((i<2))"
- line 278, "pan.___", state 1566, "((i>=2))"
- line 245, "pan.___", state 1574, "(1)"
- line 249, "pan.___", state 1582, "(1)"
- line 249, "pan.___", state 1583, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1583, "else"
- line 247, "pan.___", state 1588, "((i<1))"
- line 247, "pan.___", state 1588, "((i>=1))"
- line 253, "pan.___", state 1594, "(1)"
- line 253, "pan.___", state 1595, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1595, "else"
- line 257, "pan.___", state 1602, "(1)"
- line 257, "pan.___", state 1603, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1603, "else"
- line 262, "pan.___", state 1612, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1612, "else"
- line 1300, "pan.___", state 1615, "i = 0"
- line 1300, "pan.___", state 1617, "reader_barrier = 1"
- line 1300, "pan.___", state 1628, "((i<1))"
- line 1300, "pan.___", state 1628, "((i>=1))"
- line 268, "pan.___", state 1633, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1635, "(1)"
- line 272, "pan.___", state 1642, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1644, "(1)"
- line 272, "pan.___", state 1645, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1645, "else"
- line 270, "pan.___", state 1650, "((i<1))"
- line 270, "pan.___", state 1650, "((i>=1))"
- line 276, "pan.___", state 1655, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1657, "(1)"
- line 276, "pan.___", state 1658, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1658, "else"
- line 280, "pan.___", state 1664, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1666, "(1)"
- line 280, "pan.___", state 1667, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1667, "else"
- line 278, "pan.___", state 1672, "((i<2))"
- line 278, "pan.___", state 1672, "((i>=2))"
- line 245, "pan.___", state 1680, "(1)"
- line 249, "pan.___", state 1688, "(1)"
- line 249, "pan.___", state 1689, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1689, "else"
- line 247, "pan.___", state 1694, "((i<1))"
- line 247, "pan.___", state 1694, "((i>=1))"
- line 253, "pan.___", state 1700, "(1)"
- line 253, "pan.___", state 1701, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1701, "else"
- line 257, "pan.___", state 1708, "(1)"
- line 257, "pan.___", state 1709, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1709, "else"
- line 262, "pan.___", state 1718, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1718, "else"
- line 295, "pan.___", state 1720, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1720, "else"
- line 1300, "pan.___", state 1721, "(cache_dirty_urcu_gp_ctr)"
- line 1300, "pan.___", state 1721, "else"
- line 1304, "pan.___", state 1724, "-end-"
- (312 of 1724 states)
-unreached in proctype :init:
- line 1319, "pan.___", state 13, "((i<1))"
- line 1319, "pan.___", state 13, "((i>=1))"
- (1 of 28 states)
-unreached in proctype :never:
- line 1367, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 792 seconds
-pan: rate 3330.8797 states/second
-pan: avg transition delay 1.5481e-06 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
+++ /dev/null
-#define NO_MB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
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--4:-4:-4
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+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-Depth= 8300 States= 1e+06 Transitions= 1.86e+08 Memory= 513.029 t= 280 R= 4e+03
-Depth= 10044 States= 2e+06 Transitions= 3.84e+08 Memory= 559.221 t= 594 R= 3e+03
-Depth= 10044 States= 3e+06 Transitions= 6.04e+08 Memory= 605.803 t= 964 R= 3e+03
-pan: resizing hashtable to -w22.. done
-Depth= 10044 States= 4e+06 Transitions= 8.01e+08 Memory= 682.920 t= 1.27e+03 R= 3e+03
-Depth= 10044 States= 5e+06 Transitions= 9.95e+08 Memory= 728.721 t= 1.57e+03 R= 3e+03
-Depth= 10044 States= 6e+06 Transitions= 1.26e+09 Memory= 775.010 t= 1.99e+03 R= 3e+03
-Depth= 10044 States= 7e+06 Transitions= 1.79e+09 Memory= 821.592 t= 2.89e+03 R= 2e+03
-Depth= 10044 States= 8e+06 Transitions= 2.16e+09 Memory= 867.979 t= 3.5e+03 R= 2e+03
-Depth= 10044 States= 9e+06 Transitions= 2.51e+09 Memory= 914.072 t= 4.1e+03 R= 2e+03
-pan: resizing hashtable to -w24.. done
-Depth= 10044 States= 1e+07 Transitions= 2.87e+09 Memory= 1085.334 t= 4.67e+03 R= 2e+03
-Depth= 10044 States= 1.1e+07 Transitions= 3.27e+09 Memory= 1132.404 t= 5.29e+03 R= 2e+03
-Depth= 10044 States= 1.2e+07 Transitions= 3.66e+09 Memory= 1179.377 t= 5.91e+03 R= 2e+03
-pan: claim violated! (at depth 1680)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 10044, errors: 1
- 12387044 states, stored
-3.7683983e+09 states, matched
-3.7807853e+09 transitions (= stored+matched)
-2.0718621e+10 atomic steps
-hash conflicts: 2.2091218e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1370.332 equivalent memory usage for states (stored*(State-vector + overhead))
- 612.258 actual memory usage for states (compression: 44.68%)
- state-vector as stored = 16 byte + 36 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1197.736 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 166228 1420 961 2 2 ]
-unreached in proctype urcu_reader
- line 894, "pan.___", state 12, "((i<1))"
- line 894, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 407, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 223, "(1)"
- line 434, "pan.___", state 253, "(1)"
- line 438, "pan.___", state 266, "(1)"
- line 687, "pan.___", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 326, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 340, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 359, "(1)"
- line 434, "pan.___", state 389, "(1)"
- line 438, "pan.___", state 402, "(1)"
- line 407, "pan.___", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 455, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 469, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 488, "(1)"
- line 434, "pan.___", state 518, "(1)"
- line 438, "pan.___", state 531, "(1)"
- line 407, "pan.___", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 556, "(1)"
- line 407, "pan.___", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 557, "else"
- line 407, "pan.___", state 560, "(1)"
- line 411, "pan.___", state 568, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 570, "(1)"
- line 411, "pan.___", state 571, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 571, "else"
- line 411, "pan.___", state 574, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 409, "pan.___", state 580, "((i<1))"
- line 409, "pan.___", state 580, "((i>=1))"
- line 416, "pan.___", state 586, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 588, "(1)"
- line 416, "pan.___", state 589, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 589, "else"
- line 416, "pan.___", state 592, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 420, "pan.___", state 600, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 602, "(1)"
- line 420, "pan.___", state 603, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 603, "else"
- line 420, "pan.___", state 606, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 418, "pan.___", state 612, "((i<2))"
- line 418, "pan.___", state 612, "((i>=2))"
- line 425, "pan.___", state 619, "(1)"
- line 425, "pan.___", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 620, "else"
- line 425, "pan.___", state 623, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 429, "pan.___", state 632, "(1)"
- line 429, "pan.___", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 633, "else"
- line 429, "pan.___", state 636, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 427, "pan.___", state 642, "((i<1))"
- line 427, "pan.___", state 642, "((i>=1))"
- line 434, "pan.___", state 649, "(1)"
- line 434, "pan.___", state 650, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 650, "else"
- line 434, "pan.___", state 653, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 438, "pan.___", state 662, "(1)"
- line 438, "pan.___", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 663, "else"
- line 438, "pan.___", state 666, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 436, "pan.___", state 672, "((i<2))"
- line 436, "pan.___", state 672, "((i>=2))"
- line 446, "pan.___", state 676, "(1)"
- line 446, "pan.___", state 676, "(1)"
- line 687, "pan.___", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 687, "pan.___", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 687, "pan.___", state 681, "(1)"
- line 407, "pan.___", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 720, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 734, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 753, "(1)"
- line 434, "pan.___", state 783, "(1)"
- line 438, "pan.___", state 796, "(1)"
- line 407, "pan.___", state 824, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 856, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 870, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 889, "(1)"
- line 434, "pan.___", state 919, "(1)"
- line 438, "pan.___", state 932, "(1)"
- line 407, "pan.___", state 953, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 955, "(1)"
- line 407, "pan.___", state 956, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 956, "else"
- line 407, "pan.___", state 959, "(1)"
- line 411, "pan.___", state 967, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 969, "(1)"
- line 411, "pan.___", state 970, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 970, "else"
- line 411, "pan.___", state 973, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 409, "pan.___", state 979, "((i<1))"
- line 409, "pan.___", state 979, "((i>=1))"
- line 416, "pan.___", state 985, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 987, "(1)"
- line 416, "pan.___", state 988, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 988, "else"
- line 416, "pan.___", state 991, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 420, "pan.___", state 999, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 1001, "(1)"
- line 420, "pan.___", state 1002, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 1002, "else"
- line 420, "pan.___", state 1005, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 418, "pan.___", state 1011, "((i<2))"
- line 418, "pan.___", state 1011, "((i>=2))"
- line 425, "pan.___", state 1018, "(1)"
- line 425, "pan.___", state 1019, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 1019, "else"
- line 425, "pan.___", state 1022, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 429, "pan.___", state 1031, "(1)"
- line 429, "pan.___", state 1032, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 1032, "else"
- line 429, "pan.___", state 1035, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 427, "pan.___", state 1041, "((i<1))"
- line 427, "pan.___", state 1041, "((i>=1))"
- line 434, "pan.___", state 1048, "(1)"
- line 434, "pan.___", state 1049, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 1049, "else"
- line 434, "pan.___", state 1052, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 438, "pan.___", state 1061, "(1)"
- line 438, "pan.___", state 1062, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 1062, "else"
- line 438, "pan.___", state 1065, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 436, "pan.___", state 1071, "((i<2))"
- line 436, "pan.___", state 1071, "((i>=2))"
- line 446, "pan.___", state 1075, "(1)"
- line 446, "pan.___", state 1075, "(1)"
- line 695, "pan.___", state 1079, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 1084, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1116, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1130, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1149, "(1)"
- line 434, "pan.___", state 1179, "(1)"
- line 438, "pan.___", state 1192, "(1)"
- line 407, "pan.___", state 1216, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1248, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1262, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1281, "(1)"
- line 434, "pan.___", state 1311, "(1)"
- line 438, "pan.___", state 1324, "(1)"
- line 407, "pan.___", state 1349, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1381, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1395, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1414, "(1)"
- line 434, "pan.___", state 1444, "(1)"
- line 438, "pan.___", state 1457, "(1)"
- line 407, "pan.___", state 1478, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1510, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1524, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1543, "(1)"
- line 434, "pan.___", state 1573, "(1)"
- line 438, "pan.___", state 1586, "(1)"
- line 407, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1644, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1658, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1677, "(1)"
- line 434, "pan.___", state 1707, "(1)"
- line 438, "pan.___", state 1720, "(1)"
- line 407, "pan.___", state 1741, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1773, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1787, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1806, "(1)"
- line 434, "pan.___", state 1836, "(1)"
- line 438, "pan.___", state 1849, "(1)"
- line 407, "pan.___", state 1873, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1905, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1919, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1938, "(1)"
- line 434, "pan.___", state 1968, "(1)"
- line 438, "pan.___", state 1981, "(1)"
- line 734, "pan.___", state 2002, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 2009, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2041, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2055, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2074, "(1)"
- line 434, "pan.___", state 2104, "(1)"
- line 438, "pan.___", state 2117, "(1)"
- line 407, "pan.___", state 2138, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2170, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2184, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2203, "(1)"
- line 434, "pan.___", state 2233, "(1)"
- line 438, "pan.___", state 2246, "(1)"
- line 407, "pan.___", state 2269, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 2271, "(1)"
- line 407, "pan.___", state 2272, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 2272, "else"
- line 407, "pan.___", state 2275, "(1)"
- line 411, "pan.___", state 2283, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2286, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 2286, "else"
- line 411, "pan.___", state 2289, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 409, "pan.___", state 2295, "((i<1))"
- line 409, "pan.___", state 2295, "((i>=1))"
- line 416, "pan.___", state 2301, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2303, "(1)"
- line 416, "pan.___", state 2304, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2304, "else"
- line 416, "pan.___", state 2307, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 420, "pan.___", state 2315, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2317, "(1)"
- line 420, "pan.___", state 2318, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2318, "else"
- line 420, "pan.___", state 2321, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 418, "pan.___", state 2327, "((i<2))"
- line 418, "pan.___", state 2327, "((i>=2))"
- line 425, "pan.___", state 2334, "(1)"
- line 425, "pan.___", state 2335, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 2335, "else"
- line 425, "pan.___", state 2338, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 429, "pan.___", state 2347, "(1)"
- line 429, "pan.___", state 2348, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 2348, "else"
- line 429, "pan.___", state 2351, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 427, "pan.___", state 2357, "((i<1))"
- line 427, "pan.___", state 2357, "((i>=1))"
- line 434, "pan.___", state 2364, "(1)"
- line 434, "pan.___", state 2365, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 2365, "else"
- line 434, "pan.___", state 2368, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 438, "pan.___", state 2377, "(1)"
- line 438, "pan.___", state 2378, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 2378, "else"
- line 438, "pan.___", state 2381, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 436, "pan.___", state 2387, "((i<2))"
- line 436, "pan.___", state 2387, "((i>=2))"
- line 446, "pan.___", state 2391, "(1)"
- line 446, "pan.___", state 2391, "(1)"
- line 734, "pan.___", state 2394, "cached_urcu_active_readers = (tmp+1)"
- line 734, "pan.___", state 2395, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 734, "pan.___", state 2396, "(1)"
- line 407, "pan.___", state 2403, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2435, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2449, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2468, "(1)"
- line 434, "pan.___", state 2498, "(1)"
- line 438, "pan.___", state 2511, "(1)"
- line 407, "pan.___", state 2538, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2570, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2584, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2603, "(1)"
- line 434, "pan.___", state 2633, "(1)"
- line 438, "pan.___", state 2646, "(1)"
- line 407, "pan.___", state 2667, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2699, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2713, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2732, "(1)"
- line 434, "pan.___", state 2762, "(1)"
- line 438, "pan.___", state 2775, "(1)"
- line 407, "pan.___", state 2808, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2840, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2854, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2873, "(1)"
- line 434, "pan.___", state 2903, "(1)"
- line 438, "pan.___", state 2916, "(1)"
- line 407, "pan.___", state 2935, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2967, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2981, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 3000, "(1)"
- line 434, "pan.___", state 3030, "(1)"
- line 438, "pan.___", state 3043, "(1)"
- line 929, "pan.___", state 3064, "-end-"
- (252 of 3064 states)
-unreached in proctype urcu_writer
- line 1018, "pan.___", state 12, "((i<1))"
- line 1018, "pan.___", state 12, "((i>=1))"
- line 407, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 51, "(1)"
- line 411, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 65, "(1)"
- line 411, "pan.___", state 66, "(1)"
- line 411, "pan.___", state 66, "(1)"
- line 409, "pan.___", state 71, "((i<1))"
- line 409, "pan.___", state 71, "((i>=1))"
- line 416, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 83, "(1)"
- line 416, "pan.___", state 84, "(1)"
- line 416, "pan.___", state 84, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 98, "(1)"
- line 420, "pan.___", state 98, "(1)"
- line 418, "pan.___", state 103, "((i<2))"
- line 418, "pan.___", state 103, "((i>=2))"
- line 425, "pan.___", state 110, "(1)"
- line 425, "pan.___", state 111, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 111, "else"
- line 425, "pan.___", state 114, "(1)"
- line 425, "pan.___", state 115, "(1)"
- line 425, "pan.___", state 115, "(1)"
- line 429, "pan.___", state 123, "(1)"
- line 429, "pan.___", state 124, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 124, "else"
- line 429, "pan.___", state 127, "(1)"
- line 429, "pan.___", state 128, "(1)"
- line 429, "pan.___", state 128, "(1)"
- line 427, "pan.___", state 133, "((i<1))"
- line 427, "pan.___", state 133, "((i>=1))"
- line 434, "pan.___", state 140, "(1)"
- line 434, "pan.___", state 141, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 141, "else"
- line 434, "pan.___", state 144, "(1)"
- line 434, "pan.___", state 145, "(1)"
- line 434, "pan.___", state 145, "(1)"
- line 438, "pan.___", state 153, "(1)"
- line 438, "pan.___", state 154, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 154, "else"
- line 438, "pan.___", state 157, "(1)"
- line 438, "pan.___", state 158, "(1)"
- line 438, "pan.___", state 158, "(1)"
- line 436, "pan.___", state 163, "((i<2))"
- line 436, "pan.___", state 163, "((i>=2))"
- line 446, "pan.___", state 167, "(1)"
- line 446, "pan.___", state 167, "(1)"
- line 268, "pan.___", state 176, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 185, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 198, "cache_dirty_rcu_ptr = 0"
- line 407, "pan.___", state 238, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 252, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 270, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 284, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 303, "(1)"
- line 429, "pan.___", state 316, "(1)"
- line 434, "pan.___", state 333, "(1)"
- line 438, "pan.___", state 346, "(1)"
- line 411, "pan.___", state 383, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 401, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 415, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 447, "(1)"
- line 434, "pan.___", state 464, "(1)"
- line 438, "pan.___", state 477, "(1)"
- line 411, "pan.___", state 522, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 540, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 554, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 586, "(1)"
- line 434, "pan.___", state 603, "(1)"
- line 438, "pan.___", state 616, "(1)"
- line 411, "pan.___", state 651, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 669, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 683, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 715, "(1)"
- line 434, "pan.___", state 732, "(1)"
- line 438, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 782, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 800, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 814, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 846, "(1)"
- line 434, "pan.___", state 863, "(1)"
- line 438, "pan.___", state 876, "(1)"
- line 268, "pan.___", state 931, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 940, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 955, "(1)"
- line 280, "pan.___", state 962, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 978, "(1)"
- line 249, "pan.___", state 986, "(1)"
- line 253, "pan.___", state 998, "(1)"
- line 257, "pan.___", state 1006, "(1)"
- line 268, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1046, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1059, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1068, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1084, "(1)"
- line 249, "pan.___", state 1092, "(1)"
- line 253, "pan.___", state 1104, "(1)"
- line 257, "pan.___", state 1112, "(1)"
- line 272, "pan.___", state 1138, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1151, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1160, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1176, "(1)"
- line 249, "pan.___", state 1184, "(1)"
- line 253, "pan.___", state 1196, "(1)"
- line 257, "pan.___", state 1204, "(1)"
- line 268, "pan.___", state 1235, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1244, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1257, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1266, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1282, "(1)"
- line 249, "pan.___", state 1290, "(1)"
- line 253, "pan.___", state 1302, "(1)"
- line 257, "pan.___", state 1310, "(1)"
- line 272, "pan.___", state 1336, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1349, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1358, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1374, "(1)"
- line 249, "pan.___", state 1382, "(1)"
- line 253, "pan.___", state 1394, "(1)"
- line 257, "pan.___", state 1402, "(1)"
- line 268, "pan.___", state 1433, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1442, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1455, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1464, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1480, "(1)"
- line 249, "pan.___", state 1488, "(1)"
- line 253, "pan.___", state 1500, "(1)"
- line 257, "pan.___", state 1508, "(1)"
- line 272, "pan.___", state 1534, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1547, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1556, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1572, "(1)"
- line 249, "pan.___", state 1580, "(1)"
- line 253, "pan.___", state 1592, "(1)"
- line 257, "pan.___", state 1600, "(1)"
- line 268, "pan.___", state 1631, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1640, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1653, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1662, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1678, "(1)"
- line 249, "pan.___", state 1686, "(1)"
- line 253, "pan.___", state 1698, "(1)"
- line 257, "pan.___", state 1706, "(1)"
- line 1304, "pan.___", state 1722, "-end-"
- (129 of 1722 states)
-unreached in proctype :init:
- line 1319, "pan.___", state 13, "((i<1))"
- line 1319, "pan.___", state 13, "((i>=1))"
- (1 of 28 states)
-unreached in proctype :never:
- line 1367, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 6.09e+03 seconds
-pan: rate 2033.9606 states/second
-pan: avg transition delay 1.6108e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
+++ /dev/null
-#define NO_RMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4816
-2:2:3064
-3:2:3069
-4:2:3073
-5:2:3081
-6:2:3085
-7:2:3089
-8:0:4816
-9:1:0
-10:1:5
-11:1:9
-12:1:17
-13:1:21
-14:1:25
-15:0:4816
-16:3:4786
-17:3:4789
-18:3:4796
-19:3:4803
-20:3:4806
-21:3:4810
-22:3:4811
-23:0:4816
-24:3:4813
-25:0:4816
-26:2:3093
-27:0:4816
-28:2:3099
-29:0:4816
-30:2:3100
-31:0:4816
-32:2:3102
-33:0:4816
-34:2:3103
-35:0:4816
-36:2:3104
-37:2:3105
-38:2:3109
-39:2:3110
-40:2:3118
-41:2:3119
-42:2:3123
-43:2:3124
-44:2:3132
-45:2:3137
-46:2:3141
-47:2:3142
-48:2:3150
-49:2:3151
-50:2:3155
-51:2:3156
-52:2:3150
-53:2:3151
-54:2:3155
-55:2:3156
-56:2:3164
-57:2:3169
-58:2:3170
-59:2:3181
-60:2:3182
-61:2:3183
-62:2:3194
-63:2:3199
-64:2:3200
-65:2:3211
-66:2:3212
-67:2:3213
-68:2:3211
-69:2:3212
-70:2:3213
-71:2:3224
-72:2:3232
-73:0:4816
-74:2:3103
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-76:2:3236
-77:2:3240
-78:2:3241
-79:2:3245
-80:2:3249
-81:2:3250
-82:2:3254
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-84:2:3263
-85:2:3267
-86:2:3271
-87:2:3272
-88:2:3267
-89:2:3268
-90:2:3276
-91:0:4816
-92:2:3103
-93:0:4816
-94:2:3284
-95:2:3285
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-100:2:3291
-101:0:4816
-102:2:3995
-103:2:3996
-104:2:4000
-105:2:4004
-106:2:4005
-107:2:4009
-108:2:4014
-109:2:4022
-110:2:4026
-111:2:4027
-112:2:4022
-113:2:4026
-114:2:4027
-115:2:4031
-116:2:4038
-117:2:4045
-118:2:4046
-119:2:4053
-120:2:4058
-121:2:4065
-122:2:4066
-123:2:4065
-124:2:4066
-125:2:4073
-126:2:4077
-127:0:4816
-128:2:4082
-129:0:4816
-130:2:4083
-131:0:4816
-132:2:4084
-133:0:4816
-134:2:4085
-135:0:4816
-136:1:29
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-138:2:4086
-139:0:4816
-140:1:35
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-142:1:36
-143:0:4816
-144:2:4085
-145:0:4816
-146:1:37
-147:0:4816
-148:2:4086
-149:0:4816
-150:1:38
-151:0:4816
-152:2:4085
-153:0:4816
-154:1:39
-155:0:4816
-156:2:4086
-157:0:4816
-158:1:40
-159:0:4816
-160:2:4085
-161:0:4816
-162:1:41
-163:0:4816
-164:2:4086
-165:0:4816
-166:1:42
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-168:1:43
-169:0:4816
-170:2:4085
-171:0:4816
-172:1:44
-173:0:4816
-174:2:4086
-175:0:4816
-176:1:53
-177:0:4816
-178:2:4085
-179:0:4816
-180:1:57
-181:1:58
-182:1:62
-183:1:66
-184:1:67
-185:1:71
-186:1:79
-187:1:80
-188:1:84
-189:1:88
-190:1:89
-191:1:84
-192:1:88
-193:1:89
-194:1:93
-195:1:100
-196:1:107
-197:1:108
-198:1:115
-199:1:120
-200:1:127
-201:1:128
-202:1:127
-203:1:128
-204:1:135
-205:1:139
-206:0:4816
-207:2:4086
-208:0:4816
-209:1:144
-210:0:4816
-211:2:4087
-212:0:4816
-213:2:4092
-214:0:4816
-215:2:4093
-216:0:4816
-217:2:4101
-218:2:4102
-219:2:4106
-220:2:4110
-221:2:4111
-222:2:4115
-223:2:4123
-224:2:4124
-225:2:4128
-226:2:4132
-227:2:4133
-228:2:4128
-229:2:4132
-230:2:4133
-231:2:4137
-232:2:4144
-233:2:4151
-234:2:4152
-235:2:4159
-236:2:4164
-237:2:4171
-238:2:4172
-239:2:4171
-240:2:4172
-241:2:4179
-242:2:4183
-243:0:4816
-244:2:3293
-245:2:3976
-246:0:4816
-247:2:3103
-248:0:4816
-249:2:3294
-250:0:4816
-251:2:3103
-252:0:4816
-253:2:3297
-254:2:3298
-255:2:3302
-256:2:3303
-257:2:3311
-258:2:3312
-259:2:3316
-260:2:3317
-261:2:3325
-262:2:3330
-263:2:3334
-264:2:3335
-265:2:3343
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-268:2:3349
-269:2:3343
-270:2:3344
-271:2:3348
-272:2:3349
-273:2:3357
-274:2:3362
-275:2:3363
-276:2:3374
-277:2:3375
-278:2:3376
-279:2:3387
-280:2:3392
-281:2:3393
-282:2:3404
-283:2:3405
-284:2:3406
-285:2:3404
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-287:2:3406
-288:2:3417
-289:2:3424
-290:0:4816
-291:2:3103
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-293:2:3428
-294:2:3429
-295:2:3430
-296:2:3442
-297:2:3443
-298:2:3447
-299:2:3448
-300:2:3456
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-302:2:3465
-303:2:3466
-304:2:3474
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-306:2:3479
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-311:2:3480
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-313:2:3493
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-315:2:3505
-316:2:3506
-317:2:3507
-318:2:3518
-319:2:3523
-320:2:3524
-321:2:3535
-322:2:3536
-323:2:3537
-324:2:3535
-325:2:3536
-326:2:3537
-327:2:3548
-328:2:3559
-329:2:3560
-330:0:4816
-331:2:3103
-332:0:4816
-333:2:3567
-334:2:3568
-335:2:3572
-336:2:3573
-337:2:3581
-338:2:3582
-339:2:3586
-340:2:3587
-341:2:3595
-342:2:3600
-343:2:3604
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-345:2:3613
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-348:2:3619
-349:2:3613
-350:2:3614
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-352:2:3619
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-355:2:3633
-356:2:3644
-357:2:3645
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-359:2:3657
-360:2:3662
-361:2:3663
-362:2:3674
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-364:2:3676
-365:2:3674
-366:2:3675
-367:2:3676
-368:2:3687
-369:0:4816
-370:2:3103
-371:0:4816
-372:2:3696
-373:2:3697
-374:2:3701
-375:2:3702
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-377:2:3711
-378:2:3715
-379:2:3716
-380:2:3724
-381:2:3729
-382:2:3733
-383:2:3734
-384:2:3742
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-386:2:3747
-387:2:3748
-388:2:3742
-389:2:3743
-390:2:3747
-391:2:3748
-392:2:3756
-393:2:3761
-394:2:3762
-395:2:3773
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-397:2:3775
-398:2:3786
-399:2:3791
-400:2:3792
-401:2:3803
-402:2:3804
-403:2:3805
-404:2:3803
-405:2:3804
-406:2:3805
-407:2:3816
-408:2:3823
-409:0:4816
-410:2:3103
-411:0:4816
-412:2:3827
-413:2:3828
-414:2:3829
-415:2:3841
-416:2:3842
-417:2:3846
-418:2:3847
-419:2:3855
-420:2:3860
-421:2:3864
-422:2:3865
-423:2:3873
-424:2:3874
-425:2:3878
-426:2:3879
-427:2:3873
-428:2:3874
-429:2:3878
-430:2:3879
-431:2:3887
-432:2:3892
-433:2:3893
-434:2:3904
-435:2:3905
-436:2:3906
-437:2:3917
-438:2:3922
-439:2:3923
-440:2:3934
-441:2:3935
-442:2:3936
-443:2:3934
-444:2:3935
-445:2:3936
-446:2:3947
-447:2:3957
-448:2:3958
-449:0:4816
-450:2:3103
-451:0:4816
-452:2:3964
-453:0:4816
-454:2:4589
-455:2:4590
-456:2:4594
-457:2:4598
-458:2:4599
-459:2:4603
-460:2:4611
-461:2:4612
-462:2:4616
-463:2:4620
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-1346:1:495
-1347:1:496
-1348:1:497
-1349:1:508
-1350:1:513
-1351:1:514
-1352:1:525
-1353:1:526
-1354:1:527
-1355:1:525
-1356:1:533
-1357:1:534
-1358:1:538
-1359:1:545
-1360:0:4816
-1361:1:42
-1362:0:4816
-1363:1:43
-1364:0:4816
-1365:2:4085
-1366:0:4816
-1367:1:44
-1368:0:4816
-1369:2:4086
-1370:0:4816
-1371:1:145
-1372:0:4816
-1373:1:147
-1374:0:4816
-1375:2:4085
-1376:0:4816
-1377:1:46
-1378:0:4816
-1379:2:4086
-1380:0:4816
-1381:1:683
-1382:1:684
-1383:1:688
-1384:1:689
-1385:1:697
-1386:1:698
-1387:1:699
-1388:1:711
-1389:1:716
-1390:1:720
-1391:1:721
-1392:1:729
-1393:1:730
-1394:1:734
-1395:1:735
-1396:1:729
-1397:1:730
-1398:1:734
-1399:1:735
-1400:1:743
-1401:1:748
-1402:1:749
-1403:1:760
-1404:1:761
-1405:1:762
-1406:1:773
-1407:1:778
-1408:1:779
-1409:1:790
-1410:1:791
-1411:1:792
-1412:1:790
-1413:1:798
-1414:1:799
-1415:1:803
-1416:0:4816
-1417:1:42
-1418:0:4816
-1419:1:43
-1420:0:4816
-1421:2:4085
-1422:0:4816
-1423:1:44
-1424:0:4816
-1425:2:4086
-1426:0:4816
-1427:1:145
-1428:0:4816
-1429:1:147
-1430:0:4816
-1431:2:4085
-1432:0:4816
-1433:1:46
-1434:0:4816
-1435:2:4086
-1436:0:4816
-1437:1:812
-1438:1:815
-1439:1:816
-1440:0:4816
-1441:1:42
-1442:0:4816
-1443:1:43
-1444:0:4816
-1445:2:4085
-1446:0:4816
-1447:1:44
-1448:0:4816
-1449:2:4086
-1450:0:4816
-1451:1:145
-1452:0:4816
-1453:1:147
-1454:0:4816
-1455:2:4085
-1456:0:4816
-1457:1:46
-1458:0:4816
-1459:2:4086
-1460:0:4816
-1461:1:819
-1462:1:820
-1463:1:824
-1464:1:825
-1465:1:833
-1466:1:834
-1467:1:838
-1468:1:839
-1469:1:847
-1470:1:852
-1471:1:856
-1472:1:857
-1473:1:865
-1474:1:866
-1475:1:870
-1476:1:871
-1477:1:865
-1478:1:866
-1479:1:870
-1480:1:871
-1481:1:879
-1482:1:884
-1483:1:885
-1484:1:896
-1485:1:897
-1486:1:898
-1487:1:909
-1488:1:914
-1489:1:915
-1490:1:926
-1491:1:927
-1492:1:928
-1493:1:926
-1494:1:934
-1495:1:935
-1496:1:939
-1497:0:4816
-1498:1:42
-1499:0:4816
-1500:1:43
-1501:0:4816
-1502:2:4085
-1503:0:4816
-1504:1:44
-1505:0:4816
-1506:2:4086
-1507:0:4816
-1508:1:145
-1509:0:4816
-1510:1:147
-1511:0:4816
-1512:2:4085
-1513:0:4816
-1514:1:46
-1515:0:4816
-1516:2:4086
-1517:0:4816
-1518:1:1079
-1519:1:1080
-1520:1:1084
-1521:1:1085
-1522:1:1093
-1523:1:1094
-1524:1:1098
-1525:1:1099
-1526:1:1107
-1527:1:1112
-1528:1:1116
-1529:1:1117
-1530:1:1125
-1531:1:1126
-1532:1:1130
-1533:1:1131
-1534:1:1125
-1535:1:1126
-1536:1:1130
-1537:1:1131
-1538:1:1139
-1539:1:1144
-1540:1:1145
-1541:1:1156
-1542:1:1157
-1543:1:1158
-1544:1:1169
-1545:1:1174
-1546:1:1175
-1547:1:1186
-1548:1:1187
-1549:1:1188
-1550:1:1186
-1551:1:1194
-1552:1:1195
-1553:1:1199
-1554:1:1206
-1555:1:1210
-1556:0:4816
-1557:1:42
-1558:0:4816
-1559:1:43
-1560:0:4816
-1561:2:4085
-1562:0:4816
-1563:1:44
-1564:0:4816
-1565:2:4086
-1566:0:4816
-1567:1:145
-1568:0:4816
-1569:1:147
-1570:0:4816
-1571:2:4085
-1572:0:4816
-1573:1:46
-1574:0:4816
-1575:2:4086
-1576:0:4816
-1577:1:1211
-1578:1:1212
-1579:1:1216
-1580:1:1217
-1581:1:1225
-1582:1:1226
-1583:1:1227
-1584:1:1239
-1585:1:1244
-1586:1:1248
-1587:1:1249
-1588:1:1257
-1589:1:1258
-1590:1:1262
-1591:1:1263
-1592:1:1257
-1593:1:1258
-1594:1:1262
-1595:1:1263
-1596:1:1271
-1597:1:1276
-1598:1:1277
-1599:1:1288
-1600:1:1289
-1601:1:1290
-1602:1:1301
-1603:1:1306
-1604:1:1307
-1605:1:1318
-1606:1:1319
-1607:1:1320
-1608:1:1318
-1609:1:1326
-1610:1:1327
-1611:1:1331
-1612:0:4816
-1613:1:42
-1614:0:4816
-1615:1:43
-1616:0:4816
-1617:2:4085
-1618:0:4816
-1619:1:44
-1620:0:4816
-1621:2:4086
-1622:0:4816
-1623:1:145
-1624:0:4816
-1625:1:147
-1626:0:4816
-1627:2:4085
-1628:0:4816
-1629:1:46
-1630:0:4816
-1631:2:4086
-1632:0:4816
-1633:1:1340
-1634:0:4816
-1635:2:4085
-1636:0:4816
-1637:1:2804
-1638:1:2808
-1639:1:2809
-1640:1:2817
-1641:1:2818
-1642:1:2822
-1643:1:2823
-1644:1:2831
-1645:1:2836
-1646:1:2840
-1647:1:2841
-1648:1:2849
-1649:1:2850
-1650:1:2854
-1651:1:2855
-1652:1:2849
-1653:1:2850
-1654:1:2854
-1655:1:2855
-1656:1:2863
-1657:1:2868
-1658:1:2869
-1659:1:2880
-1660:1:2881
-1661:1:2882
-1662:1:2893
-1663:1:2898
-1664:1:2899
-1665:1:2910
-1666:1:2911
-1667:1:2912
-1668:1:2910
-1669:1:2918
-1670:1:2919
-1671:1:2923
-1672:1:2927
-1673:0:4816
-1674:2:4086
-1675:0:4816
-1676:1:1342
-1677:1:1343
-1678:0:4814
-1679:1:42
-1680:0:4820
-1681:1:2421
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-Depth= 8002 States= 1e+06 Transitions= 1.77e+08 Memory= 513.029 t= 264 R= 4e+03
-Depth= 9746 States= 2e+06 Transitions= 3.71e+08 Memory= 559.318 t= 570 R= 4e+03
-Depth= 9746 States= 3e+06 Transitions= 5.8e+08 Memory= 605.901 t= 916 R= 3e+03
-pan: resizing hashtable to -w22.. done
-Depth= 9746 States= 4e+06 Transitions= 7.6e+08 Memory= 682.920 t= 1.19e+03 R= 3e+03
-Depth= 9746 States= 5e+06 Transitions= 9.44e+08 Memory= 728.721 t= 1.47e+03 R= 3e+03
-Depth= 9746 States= 6e+06 Transitions= 1.35e+09 Memory= 775.303 t= 2.12e+03 R= 3e+03
-Depth= 9746 States= 7e+06 Transitions= 1.79e+09 Memory= 821.885 t= 2.84e+03 R= 2e+03
-Depth= 9746 States= 8e+06 Transitions= 2.11e+09 Memory= 868.076 t= 3.35e+03 R= 2e+03
-Depth= 9746 States= 9e+06 Transitions= 2.49e+09 Memory= 914.658 t= 3.99e+03 R= 2e+03
-pan: resizing hashtable to -w24.. done
-Depth= 9746 States= 1e+07 Transitions= 2.83e+09 Memory= 1085.529 t= 4.5e+03 R= 2e+03
-Depth= 9746 States= 1.1e+07 Transitions= 3.2e+09 Memory= 1132.795 t= 5.06e+03 R= 2e+03
-Depth= 9746 States= 1.2e+07 Transitions= 3.59e+09 Memory= 1179.670 t= 5.66e+03 R= 2e+03
-Depth= 9746 States= 1.3e+07 Transitions= 3.78e+09 Memory= 1226.447 t= 5.95e+03 R= 2e+03
-Depth= 9746 States= 1.4e+07 Transitions= 3.96e+09 Memory= 1272.346 t= 6.23e+03 R= 2e+03
-Depth= 9746 States= 1.5e+07 Transitions= 4.17e+09 Memory= 1318.440 t= 6.56e+03 R= 2e+03
-Depth= 9746 States= 1.6e+07 Transitions= 4.37e+09 Memory= 1364.338 t= 6.86e+03 R= 2e+03
-Depth= 9746 States= 1.7e+07 Transitions= 4.55e+09 Memory= 1410.139 t= 7.14e+03 R= 2e+03
-Depth= 9746 States= 1.8e+07 Transitions= 4.8e+09 Memory= 1456.135 t= 7.53e+03 R= 2e+03
-Depth= 9746 States= 1.9e+07 Transitions= 5.2e+09 Memory= 1502.326 t= 8.17e+03 R= 2e+03
-Depth= 9746 States= 2e+07 Transitions= 5.67e+09 Memory= 1548.615 t= 8.94e+03 R= 2e+03
-Depth= 9746 States= 2.1e+07 Transitions= 6.01e+09 Memory= 1594.611 t= 9.49e+03 R= 2e+03
-Depth= 9746 States= 2.2e+07 Transitions= 6.42e+09 Memory= 1640.998 t= 1.01e+04 R= 2e+03
-Depth= 9746 States= 2.3e+07 Transitions= 6.67e+09 Memory= 1687.580 t= 1.05e+04 R= 2e+03
-Depth= 9746 States= 2.4e+07 Transitions= 6.96e+09 Memory= 1733.674 t= 1.1e+04 R= 2e+03
-Depth= 9746 States= 2.5e+07 Transitions= 7.2e+09 Memory= 1779.865 t= 1.14e+04 R= 2e+03
-Depth= 9746 States= 2.6e+07 Transitions= 7.61e+09 Memory= 1826.154 t= 1.2e+04 R= 2e+03
-Depth= 9746 States= 2.7e+07 Transitions= 8.36e+09 Memory= 1872.248 t= 1.32e+04 R= 2e+03
-Depth= 9746 States= 2.8e+07 Transitions= 9.08e+09 Memory= 1918.733 t= 1.44e+04 R= 2e+03
-Depth= 9746 States= 2.9e+07 Transitions= 9.48e+09 Memory= 1965.608 t= 1.51e+04 R= 2e+03
-Depth= 9746 States= 3e+07 Transitions= 9.94e+09 Memory= 2012.483 t= 1.58e+04 R= 2e+03
-Depth= 9746 States= 3.1e+07 Transitions= 1.02e+10 Memory= 2058.576 t= 1.62e+04 R= 2e+03
-Depth= 9746 States= 3.2e+07 Transitions= 1.05e+10 Memory= 2104.475 t= 1.67e+04 R= 2e+03
-Depth= 9746 States= 3.3e+07 Transitions= 1.08e+10 Memory= 2150.373 t= 1.72e+04 R= 2e+03
-Depth= 9746 States= 3.4e+07 Transitions= 1.15e+10 Memory= 2196.369 t= 1.84e+04 R= 2e+03
-pan: resizing hashtable to -w26.. done
-Depth= 9746 States= 3.5e+07 Transitions= 1.22e+10 Memory= 2738.350 t= 1.96e+04 R= 2e+03
-Depth= 9746 States= 3.6e+07 Transitions= 1.27e+10 Memory= 2784.639 t= 2.03e+04 R= 2e+03
-Depth= 9746 States= 3.7e+07 Transitions= 1.29e+10 Memory= 2831.026 t= 2.07e+04 R= 2e+03
-Depth= 9746 States= 3.8e+07 Transitions= 1.34e+10 Memory= 2877.510 t= 2.14e+04 R= 2e+03
-Depth= 9746 States= 3.9e+07 Transitions= 1.39e+10 Memory= 2923.701 t= 2.21e+04 R= 2e+03
-Depth= 9746 States= 4e+07 Transitions= 1.44e+10 Memory= 2969.697 t= 2.29e+04 R= 2e+03
-Depth= 9746 States= 4.1e+07 Transitions= 1.48e+10 Memory= 3015.889 t= 2.36e+04 R= 2e+03
-Depth= 9746 States= 4.2e+07 Transitions= 1.52e+10 Memory= 3061.787 t= 2.42e+04 R= 2e+03
-Depth= 9746 States= 4.3e+07 Transitions= 1.57e+10 Memory= 3107.979 t= 2.5e+04 R= 2e+03
-Depth= 9746 States= 4.4e+07 Transitions= 1.61e+10 Memory= 3153.779 t= 2.56e+04 R= 2e+03
-Depth= 9746 States= 4.5e+07 Transitions= 1.64e+10 Memory= 3199.873 t= 2.6e+04 R= 2e+03
-Depth= 9746 States= 4.6e+07 Transitions= 1.68e+10 Memory= 3245.967 t= 2.66e+04 R= 2e+03
-Depth= 9746 States= 4.7e+07 Transitions= 1.7e+10 Memory= 3291.865 t= 2.7e+04 R= 2e+03
-Depth= 9746 States= 4.8e+07 Transitions= 1.74e+10 Memory= 3338.057 t= 2.75e+04 R= 2e+03
-Depth= 9746 States= 4.9e+07 Transitions= 1.79e+10 Memory= 3384.151 t= 2.83e+04 R= 2e+03
-Depth= 9868 States= 5e+07 Transitions= 1.82e+10 Memory= 3429.951 t= 2.88e+04 R= 2e+03
-Depth= 9912 States= 5.1e+07 Transitions= 1.86e+10 Memory= 3475.752 t= 2.94e+04 R= 2e+03
-Depth= 9912 States= 5.2e+07 Transitions= 1.89e+10 Memory= 3521.553 t= 2.99e+04 R= 2e+03
-Depth= 9912 States= 5.3e+07 Transitions= 1.93e+10 Memory= 3567.256 t= 3.05e+04 R= 2e+03
-Depth= 9912 States= 5.4e+07 Transitions= 1.96e+10 Memory= 3613.154 t= 3.1e+04 R= 2e+03
-Depth= 9912 States= 5.5e+07 Transitions= 2e+10 Memory= 3659.053 t= 3.16e+04 R= 2e+03
-Depth= 9912 States= 5.6e+07 Transitions= 2.03e+10 Memory= 3704.756 t= 3.2e+04 R= 2e+03
-Depth= 9912 States= 5.7e+07 Transitions= 2.06e+10 Memory= 3750.557 t= 3.25e+04 R= 2e+03
-Depth= 9912 States= 5.8e+07 Transitions= 2.1e+10 Memory= 3796.455 t= 3.31e+04 R= 2e+03
-Depth= 9912 States= 5.9e+07 Transitions= 2.13e+10 Memory= 3842.256 t= 3.37e+04 R= 2e+03
-Depth= 9912 States= 6e+07 Transitions= 2.16e+10 Memory= 3888.057 t= 3.42e+04 R= 2e+03
-Depth= 9912 States= 6.1e+07 Transitions= 2.2e+10 Memory= 3933.858 t= 3.47e+04 R= 2e+03
-Depth= 9912 States= 6.2e+07 Transitions= 2.23e+10 Memory= 3979.658 t= 3.52e+04 R= 2e+03
-Depth= 9912 States= 6.3e+07 Transitions= 2.27e+10 Memory= 4025.459 t= 3.58e+04 R= 2e+03
-Depth= 9912 States= 6.4e+07 Transitions= 2.3e+10 Memory= 4071.260 t= 3.63e+04 R= 2e+03
-Depth= 9912 States= 6.5e+07 Transitions= 2.33e+10 Memory= 4116.963 t= 3.69e+04 R= 2e+03
-Depth= 9912 States= 6.6e+07 Transitions= 2.36e+10 Memory= 4162.764 t= 3.73e+04 R= 2e+03
-Depth= 9912 States= 6.7e+07 Transitions= 2.39e+10 Memory= 4208.565 t= 3.78e+04 R= 2e+03
-Depth= 9912 States= 6.8e+07 Transitions= 2.42e+10 Memory= 4254.463 t= 3.83e+04 R= 2e+03
-Depth= 9912 States= 6.9e+07 Transitions= 2.46e+10 Memory= 4300.361 t= 3.88e+04 R= 2e+03
-Depth= 9912 States= 7e+07 Transitions= 2.5e+10 Memory= 4346.553 t= 3.94e+04 R= 2e+03
-Depth= 9912 States= 7.1e+07 Transitions= 2.53e+10 Memory= 4392.354 t= 4e+04 R= 2e+03
-Depth= 9912 States= 7.2e+07 Transitions= 2.58e+10 Memory= 4438.252 t= 4.07e+04 R= 2e+03
-Depth= 9912 States= 7.3e+07 Transitions= 2.61e+10 Memory= 4484.151 t= 4.12e+04 R= 2e+03
-Depth= 9912 States= 7.4e+07 Transitions= 2.66e+10 Memory= 4530.635 t= 4.19e+04 R= 2e+03
-Depth= 9912 States= 7.5e+07 Transitions= 2.69e+10 Memory= 4577.315 t= 4.25e+04 R= 2e+03
-Depth= 9912 States= 7.6e+07 Transitions= 2.74e+10 Memory= 4623.897 t= 4.32e+04 R= 2e+03
-Depth= 9912 States= 7.7e+07 Transitions= 2.78e+10 Memory= 4669.893 t= 4.39e+04 R= 2e+03
-Depth= 9912 States= 7.8e+07 Transitions= 2.82e+10 Memory= 4716.084 t= 4.45e+04 R= 2e+03
-Depth= 9912 States= 7.9e+07 Transitions= 2.85e+10 Memory= 4762.568 t= 4.5e+04 R= 2e+03
-Depth= 9912 States= 8e+07 Transitions= 2.87e+10 Memory= 4808.369 t= 4.52e+04 R= 2e+03
-Depth= 9912 States= 8.1e+07 Transitions= 2.89e+10 Memory= 4854.170 t= 4.56e+04 R= 2e+03
-Depth= 9912 States= 8.2e+07 Transitions= 2.91e+10 Memory= 4899.971 t= 4.59e+04 R= 2e+03
-Depth= 9912 States= 8.3e+07 Transitions= 2.93e+10 Memory= 4945.772 t= 4.61e+04 R= 2e+03
-Depth= 9912 States= 8.4e+07 Transitions= 2.95e+10 Memory= 4991.475 t= 4.64e+04 R= 2e+03
-Depth= 9912 States= 8.5e+07 Transitions= 2.99e+10 Memory= 5037.276 t= 4.71e+04 R= 2e+03
-Depth= 9912 States= 8.6e+07 Transitions= 3.03e+10 Memory= 5083.076 t= 4.78e+04 R= 2e+03
-Depth= 9912 States= 8.7e+07 Transitions= 3.07e+10 Memory= 5128.877 t= 4.83e+04 R= 2e+03
-pan: claim violated! (at depth 1530)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 9912, errors: 1
- 87915830 states, stored
-3.0918075e+10 states, matched
-3.100599e+10 transitions (= stored+matched)
-1.742054e+11 atomic steps
-hash conflicts: 1.5948958e+10 (resolved)
-
-Stats on memory usage (in Megabytes):
- 9725.796 equivalent memory usage for states (stored*(State-vector + overhead))
- 4202.002 actual memory usage for states (compression: 43.20%)
- state-vector as stored = 14 byte + 36 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 5170.869 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 517357 4332 4682 2 2 ]
-unreached in proctype urcu_reader
- line 894, "pan.___", state 12, "((i<1))"
- line 894, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 407, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 223, "(1)"
- line 434, "pan.___", state 253, "(1)"
- line 438, "pan.___", state 266, "(1)"
- line 687, "pan.___", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 326, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 340, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 359, "(1)"
- line 434, "pan.___", state 389, "(1)"
- line 438, "pan.___", state 402, "(1)"
- line 407, "pan.___", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 455, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 469, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 488, "(1)"
- line 434, "pan.___", state 518, "(1)"
- line 438, "pan.___", state 531, "(1)"
- line 407, "pan.___", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 556, "(1)"
- line 407, "pan.___", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 557, "else"
- line 407, "pan.___", state 560, "(1)"
- line 411, "pan.___", state 568, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 570, "(1)"
- line 411, "pan.___", state 571, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 571, "else"
- line 411, "pan.___", state 574, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 409, "pan.___", state 580, "((i<1))"
- line 409, "pan.___", state 580, "((i>=1))"
- line 416, "pan.___", state 586, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 588, "(1)"
- line 416, "pan.___", state 589, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 589, "else"
- line 416, "pan.___", state 592, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 420, "pan.___", state 600, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 602, "(1)"
- line 420, "pan.___", state 603, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 603, "else"
- line 420, "pan.___", state 606, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 418, "pan.___", state 612, "((i<2))"
- line 418, "pan.___", state 612, "((i>=2))"
- line 425, "pan.___", state 619, "(1)"
- line 425, "pan.___", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 620, "else"
- line 425, "pan.___", state 623, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 429, "pan.___", state 632, "(1)"
- line 429, "pan.___", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 633, "else"
- line 429, "pan.___", state 636, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 427, "pan.___", state 642, "((i<1))"
- line 427, "pan.___", state 642, "((i>=1))"
- line 434, "pan.___", state 649, "(1)"
- line 434, "pan.___", state 650, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 650, "else"
- line 434, "pan.___", state 653, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 438, "pan.___", state 662, "(1)"
- line 438, "pan.___", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 663, "else"
- line 438, "pan.___", state 666, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 436, "pan.___", state 672, "((i<2))"
- line 436, "pan.___", state 672, "((i>=2))"
- line 446, "pan.___", state 676, "(1)"
- line 446, "pan.___", state 676, "(1)"
- line 687, "pan.___", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 687, "pan.___", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 687, "pan.___", state 681, "(1)"
- line 407, "pan.___", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 720, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 734, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 753, "(1)"
- line 434, "pan.___", state 783, "(1)"
- line 438, "pan.___", state 796, "(1)"
- line 407, "pan.___", state 824, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 856, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 870, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 889, "(1)"
- line 434, "pan.___", state 919, "(1)"
- line 438, "pan.___", state 932, "(1)"
- line 407, "pan.___", state 953, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 955, "(1)"
- line 407, "pan.___", state 956, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 956, "else"
- line 407, "pan.___", state 959, "(1)"
- line 411, "pan.___", state 967, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 969, "(1)"
- line 411, "pan.___", state 970, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 970, "else"
- line 411, "pan.___", state 973, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 409, "pan.___", state 979, "((i<1))"
- line 409, "pan.___", state 979, "((i>=1))"
- line 416, "pan.___", state 985, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 987, "(1)"
- line 416, "pan.___", state 988, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 988, "else"
- line 416, "pan.___", state 991, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 420, "pan.___", state 999, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 1001, "(1)"
- line 420, "pan.___", state 1002, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 1002, "else"
- line 420, "pan.___", state 1005, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 418, "pan.___", state 1011, "((i<2))"
- line 418, "pan.___", state 1011, "((i>=2))"
- line 425, "pan.___", state 1018, "(1)"
- line 425, "pan.___", state 1019, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 1019, "else"
- line 425, "pan.___", state 1022, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 429, "pan.___", state 1031, "(1)"
- line 429, "pan.___", state 1032, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 1032, "else"
- line 429, "pan.___", state 1035, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 427, "pan.___", state 1041, "((i<1))"
- line 427, "pan.___", state 1041, "((i>=1))"
- line 434, "pan.___", state 1048, "(1)"
- line 434, "pan.___", state 1049, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 1049, "else"
- line 434, "pan.___", state 1052, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 438, "pan.___", state 1061, "(1)"
- line 438, "pan.___", state 1062, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 1062, "else"
- line 438, "pan.___", state 1065, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 436, "pan.___", state 1071, "((i<2))"
- line 436, "pan.___", state 1071, "((i>=2))"
- line 446, "pan.___", state 1075, "(1)"
- line 446, "pan.___", state 1075, "(1)"
- line 695, "pan.___", state 1079, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 1084, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1116, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1130, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1149, "(1)"
- line 434, "pan.___", state 1179, "(1)"
- line 438, "pan.___", state 1192, "(1)"
- line 407, "pan.___", state 1216, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1248, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1262, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1281, "(1)"
- line 434, "pan.___", state 1311, "(1)"
- line 438, "pan.___", state 1324, "(1)"
- line 407, "pan.___", state 1349, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1381, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1395, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1414, "(1)"
- line 434, "pan.___", state 1444, "(1)"
- line 438, "pan.___", state 1457, "(1)"
- line 407, "pan.___", state 1478, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1510, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1524, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1543, "(1)"
- line 434, "pan.___", state 1573, "(1)"
- line 438, "pan.___", state 1586, "(1)"
- line 407, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1644, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1658, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1677, "(1)"
- line 434, "pan.___", state 1707, "(1)"
- line 438, "pan.___", state 1720, "(1)"
- line 407, "pan.___", state 1741, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1773, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1787, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1806, "(1)"
- line 434, "pan.___", state 1836, "(1)"
- line 438, "pan.___", state 1849, "(1)"
- line 407, "pan.___", state 1873, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1905, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1919, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1938, "(1)"
- line 434, "pan.___", state 1968, "(1)"
- line 438, "pan.___", state 1981, "(1)"
- line 734, "pan.___", state 2002, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 2009, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2041, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2055, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2074, "(1)"
- line 434, "pan.___", state 2104, "(1)"
- line 438, "pan.___", state 2117, "(1)"
- line 407, "pan.___", state 2138, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2170, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2184, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2203, "(1)"
- line 434, "pan.___", state 2233, "(1)"
- line 438, "pan.___", state 2246, "(1)"
- line 407, "pan.___", state 2269, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 2271, "(1)"
- line 407, "pan.___", state 2272, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 2272, "else"
- line 407, "pan.___", state 2275, "(1)"
- line 411, "pan.___", state 2283, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2286, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 2286, "else"
- line 411, "pan.___", state 2289, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 409, "pan.___", state 2295, "((i<1))"
- line 409, "pan.___", state 2295, "((i>=1))"
- line 416, "pan.___", state 2301, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2303, "(1)"
- line 416, "pan.___", state 2304, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2304, "else"
- line 416, "pan.___", state 2307, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 420, "pan.___", state 2315, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2317, "(1)"
- line 420, "pan.___", state 2318, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2318, "else"
- line 420, "pan.___", state 2321, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 418, "pan.___", state 2327, "((i<2))"
- line 418, "pan.___", state 2327, "((i>=2))"
- line 425, "pan.___", state 2334, "(1)"
- line 425, "pan.___", state 2335, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 2335, "else"
- line 425, "pan.___", state 2338, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 429, "pan.___", state 2347, "(1)"
- line 429, "pan.___", state 2348, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 2348, "else"
- line 429, "pan.___", state 2351, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 427, "pan.___", state 2357, "((i<1))"
- line 427, "pan.___", state 2357, "((i>=1))"
- line 434, "pan.___", state 2364, "(1)"
- line 434, "pan.___", state 2365, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 2365, "else"
- line 434, "pan.___", state 2368, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 438, "pan.___", state 2377, "(1)"
- line 438, "pan.___", state 2378, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 2378, "else"
- line 438, "pan.___", state 2381, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 436, "pan.___", state 2387, "((i<2))"
- line 436, "pan.___", state 2387, "((i>=2))"
- line 446, "pan.___", state 2391, "(1)"
- line 446, "pan.___", state 2391, "(1)"
- line 734, "pan.___", state 2394, "cached_urcu_active_readers = (tmp+1)"
- line 734, "pan.___", state 2395, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 734, "pan.___", state 2396, "(1)"
- line 407, "pan.___", state 2403, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2435, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2449, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2468, "(1)"
- line 434, "pan.___", state 2498, "(1)"
- line 438, "pan.___", state 2511, "(1)"
- line 407, "pan.___", state 2538, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2570, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2584, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2603, "(1)"
- line 434, "pan.___", state 2633, "(1)"
- line 438, "pan.___", state 2646, "(1)"
- line 407, "pan.___", state 2667, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2699, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2713, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2732, "(1)"
- line 434, "pan.___", state 2762, "(1)"
- line 438, "pan.___", state 2775, "(1)"
- line 245, "pan.___", state 2808, "(1)"
- line 253, "pan.___", state 2828, "(1)"
- line 257, "pan.___", state 2836, "(1)"
- line 245, "pan.___", state 2851, "(1)"
- line 253, "pan.___", state 2871, "(1)"
- line 257, "pan.___", state 2879, "(1)"
- line 929, "pan.___", state 2896, "-end-"
- (246 of 2896 states)
-unreached in proctype urcu_writer
- line 1018, "pan.___", state 12, "((i<1))"
- line 1018, "pan.___", state 12, "((i>=1))"
- line 407, "pan.___", state 46, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 60, "cache_dirty_urcu_active_readers = 0"
- line 425, "pan.___", state 111, "(1)"
- line 429, "pan.___", state 124, "(1)"
- line 268, "pan.___", state 177, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 179, "(1)"
- line 272, "pan.___", state 186, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 188, "(1)"
- line 272, "pan.___", state 189, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 189, "else"
- line 270, "pan.___", state 194, "((i<1))"
- line 270, "pan.___", state 194, "((i>=1))"
- line 276, "pan.___", state 199, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 201, "(1)"
- line 276, "pan.___", state 202, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 202, "else"
- line 280, "pan.___", state 208, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 210, "(1)"
- line 280, "pan.___", state 211, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 211, "else"
- line 285, "pan.___", state 220, "(cache_dirty_urcu_gp_ctr)"
- line 285, "pan.___", state 220, "else"
- line 407, "pan.___", state 239, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 253, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 271, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 285, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 304, "(1)"
- line 429, "pan.___", state 317, "(1)"
- line 434, "pan.___", state 334, "(1)"
- line 438, "pan.___", state 347, "(1)"
- line 411, "pan.___", state 384, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 402, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 416, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 448, "(1)"
- line 434, "pan.___", state 465, "(1)"
- line 438, "pan.___", state 478, "(1)"
- line 411, "pan.___", state 523, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 541, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 555, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 587, "(1)"
- line 434, "pan.___", state 604, "(1)"
- line 438, "pan.___", state 617, "(1)"
- line 411, "pan.___", state 652, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 670, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 684, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 716, "(1)"
- line 434, "pan.___", state 733, "(1)"
- line 438, "pan.___", state 746, "(1)"
- line 411, "pan.___", state 783, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 801, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 815, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 847, "(1)"
- line 434, "pan.___", state 864, "(1)"
- line 438, "pan.___", state 877, "(1)"
- line 268, "pan.___", state 932, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 941, "cache_dirty_urcu_active_readers = 0"
- line 245, "pan.___", state 979, "(1)"
- line 249, "pan.___", state 987, "(1)"
- line 253, "pan.___", state 999, "(1)"
- line 257, "pan.___", state 1007, "(1)"
- line 268, "pan.___", state 1038, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1047, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1060, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1069, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1085, "(1)"
- line 249, "pan.___", state 1093, "(1)"
- line 253, "pan.___", state 1105, "(1)"
- line 257, "pan.___", state 1113, "(1)"
- line 272, "pan.___", state 1139, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1152, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1161, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1177, "(1)"
- line 249, "pan.___", state 1185, "(1)"
- line 253, "pan.___", state 1197, "(1)"
- line 257, "pan.___", state 1205, "(1)"
- line 268, "pan.___", state 1236, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1245, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1258, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1267, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1283, "(1)"
- line 249, "pan.___", state 1291, "(1)"
- line 253, "pan.___", state 1303, "(1)"
- line 257, "pan.___", state 1311, "(1)"
- line 272, "pan.___", state 1337, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1350, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1359, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1375, "(1)"
- line 249, "pan.___", state 1383, "(1)"
- line 253, "pan.___", state 1395, "(1)"
- line 257, "pan.___", state 1403, "(1)"
- line 268, "pan.___", state 1434, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1443, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1456, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1465, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1481, "(1)"
- line 249, "pan.___", state 1489, "(1)"
- line 253, "pan.___", state 1501, "(1)"
- line 257, "pan.___", state 1509, "(1)"
- line 272, "pan.___", state 1535, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1548, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1557, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1573, "(1)"
- line 249, "pan.___", state 1581, "(1)"
- line 253, "pan.___", state 1593, "(1)"
- line 257, "pan.___", state 1601, "(1)"
- line 268, "pan.___", state 1632, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1641, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1654, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1663, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1679, "(1)"
- line 249, "pan.___", state 1687, "(1)"
- line 253, "pan.___", state 1699, "(1)"
- line 257, "pan.___", state 1707, "(1)"
- line 1304, "pan.___", state 1723, "-end-"
- (110 of 1723 states)
-unreached in proctype :init:
- line 1319, "pan.___", state 13, "((i<1))"
- line 1319, "pan.___", state 13, "((i>=1))"
- (1 of 28 states)
-unreached in proctype :never:
- line 1367, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 4.88e+04 seconds
-pan: rate 1799.8673 states/second
-pan: avg transition delay 1.5754e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
+++ /dev/null
-#define NO_WMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
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--4:-4:-4
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+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-Depth= 9651 States= 1e+06 Transitions= 1.79e+08 Memory= 513.029 t= 267 R= 4e+03
-Depth= 9651 States= 2e+06 Transitions= 4.37e+08 Memory= 559.416 t= 679 R= 3e+03
-Depth= 9651 States= 3e+06 Transitions= 7.08e+08 Memory= 605.901 t= 1.13e+03 R= 3e+03
-pan: resizing hashtable to -w22.. done
-Depth= 9651 States= 4e+06 Transitions= 9.4e+08 Memory= 683.213 t= 1.48e+03 R= 3e+03
-Depth= 9651 States= 5e+06 Transitions= 1.26e+09 Memory= 730.479 t= 1.98e+03 R= 3e+03
-Depth= 9651 States= 6e+06 Transitions= 1.55e+09 Memory= 777.451 t= 2.43e+03 R= 2e+03
-Depth= 9651 States= 7e+06 Transitions= 1.82e+09 Memory= 824.522 t= 2.87e+03 R= 2e+03
-Depth= 9651 States= 8e+06 Transitions= 2.01e+09 Memory= 871.494 t= 3.16e+03 R= 3e+03
-Depth= 9651 States= 9e+06 Transitions= 2.19e+09 Memory= 917.295 t= 3.45e+03 R= 3e+03
-pan: resizing hashtable to -w24.. done
-Depth= 9651 States= 1e+07 Transitions= 2.37e+09 Memory= 1087.092 t= 3.73e+03 R= 3e+03
-Depth= 9651 States= 1.1e+07 Transitions= 2.59e+09 Memory= 1133.088 t= 4.06e+03 R= 3e+03
-Depth= 9651 States= 1.2e+07 Transitions= 2.88e+09 Memory= 1179.572 t= 4.5e+03 R= 3e+03
-Depth= 9651 States= 1.3e+07 Transitions= 3.1e+09 Memory= 1226.545 t= 4.84e+03 R= 3e+03
-Depth= 9651 States= 1.4e+07 Transitions= 3.33e+09 Memory= 1272.834 t= 5.18e+03 R= 3e+03
-Depth= 9651 States= 1.5e+07 Transitions= 3.58e+09 Memory= 1318.733 t= 5.57e+03 R= 3e+03
-Depth= 9651 States= 1.6e+07 Transitions= 3.79e+09 Memory= 1364.729 t= 5.9e+03 R= 3e+03
-Depth= 9651 States= 1.7e+07 Transitions= 4.09e+09 Memory= 1410.725 t= 6.36e+03 R= 3e+03
-Depth= 9892 States= 1.8e+07 Transitions= 4.34e+09 Memory= 1456.526 t= 6.76e+03 R= 3e+03
-Depth= 9897 States= 1.9e+07 Transitions= 4.61e+09 Memory= 1502.326 t= 7.17e+03 R= 3e+03
-Depth= 9897 States= 2e+07 Transitions= 4.88e+09 Memory= 1548.127 t= 7.6e+03 R= 3e+03
-Depth= 9897 States= 2.1e+07 Transitions= 5.16e+09 Memory= 1594.318 t= 8.03e+03 R= 3e+03
-Depth= 9897 States= 2.2e+07 Transitions= 5.46e+09 Memory= 1640.315 t= 8.52e+03 R= 3e+03
-Depth= 9897 States= 2.3e+07 Transitions= 5.74e+09 Memory= 1686.115 t= 8.95e+03 R= 3e+03
-Depth= 9897 States= 2.4e+07 Transitions= 6e+09 Memory= 1731.916 t= 9.36e+03 R= 3e+03
-Depth= 9897 States= 2.5e+07 Transitions= 6.24e+09 Memory= 1777.717 t= 9.75e+03 R= 3e+03
-Depth= 9897 States= 2.6e+07 Transitions= 6.48e+09 Memory= 1823.518 t= 1.01e+04 R= 3e+03
-Depth= 9897 States= 2.7e+07 Transitions= 6.7e+09 Memory= 1869.318 t= 1.05e+04 R= 3e+03
-Depth= 9897 States= 2.8e+07 Transitions= 7.03e+09 Memory= 1916.486 t= 1.1e+04 R= 3e+03
-Depth= 9897 States= 2.9e+07 Transitions= 7.36e+09 Memory= 1962.678 t= 1.15e+04 R= 3e+03
-Depth= 9897 States= 3e+07 Transitions= 7.63e+09 Memory= 2008.967 t= 1.2e+04 R= 3e+03
-Depth= 9897 States= 3.1e+07 Transitions= 7.94e+09 Memory= 2054.963 t= 1.25e+04 R= 2e+03
-Depth= 9897 States= 3.2e+07 Transitions= 8.2e+09 Memory= 2102.033 t= 1.29e+04 R= 2e+03
-Depth= 9897 States= 3.3e+07 Transitions= 8.41e+09 Memory= 2148.029 t= 1.32e+04 R= 2e+03
-Depth= 9897 States= 3.4e+07 Transitions= 8.68e+09 Memory= 2194.123 t= 1.36e+04 R= 2e+03
-pan: resizing hashtable to -w26.. done
-Depth= 9897 States= 3.5e+07 Transitions= 8.91e+09 Memory= 2736.006 t= 1.4e+04 R= 2e+03
-Depth= 9897 States= 3.6e+07 Transitions= 9.2e+09 Memory= 2781.807 t= 1.44e+04 R= 2e+03
-Depth= 9897 States= 3.7e+07 Transitions= 9.48e+09 Memory= 2827.608 t= 1.49e+04 R= 2e+03
-Depth= 9897 States= 3.8e+07 Transitions= 9.72e+09 Memory= 2873.408 t= 1.52e+04 R= 2e+03
-Depth= 9897 States= 3.9e+07 Transitions= 9.98e+09 Memory= 2919.209 t= 1.56e+04 R= 2e+03
-Depth= 9897 States= 4e+07 Transitions= 1.02e+10 Memory= 2965.010 t= 1.6e+04 R= 2e+03
-Depth= 9897 States= 4.1e+07 Transitions= 1.05e+10 Memory= 3010.713 t= 1.64e+04 R= 2e+03
-Depth= 9897 States= 4.2e+07 Transitions= 1.07e+10 Memory= 3056.611 t= 1.68e+04 R= 3e+03
-pan: claim violated! (at depth 1439)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 9897, errors: 1
- 42642410 states, stored
-1.0909582e+10 states, matched
-1.0952224e+10 transitions (= stored+matched)
-5.922913e+10 atomic steps
-hash conflicts: 6.3170511e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4717.369 equivalent memory usage for states (stored*(State-vector + overhead))
- 2117.231 actual memory usage for states (compression: 44.88%)
- state-vector as stored = 16 byte + 36 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 3086.494 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 304368 3993 2946 2 2 ]
-unreached in proctype urcu_reader
- line 894, "pan.___", state 12, "((i<1))"
- line 894, "pan.___", state 12, "((i>=1))"
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 407, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 223, "(1)"
- line 434, "pan.___", state 253, "(1)"
- line 438, "pan.___", state 266, "(1)"
- line 687, "pan.___", state 287, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 294, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 326, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 340, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 359, "(1)"
- line 434, "pan.___", state 389, "(1)"
- line 438, "pan.___", state 402, "(1)"
- line 407, "pan.___", state 423, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 455, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 469, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 488, "(1)"
- line 434, "pan.___", state 518, "(1)"
- line 438, "pan.___", state 531, "(1)"
- line 407, "pan.___", state 554, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 556, "(1)"
- line 407, "pan.___", state 557, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 557, "else"
- line 407, "pan.___", state 560, "(1)"
- line 411, "pan.___", state 568, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 570, "(1)"
- line 411, "pan.___", state 571, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 571, "else"
- line 411, "pan.___", state 574, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 411, "pan.___", state 575, "(1)"
- line 409, "pan.___", state 580, "((i<1))"
- line 409, "pan.___", state 580, "((i>=1))"
- line 416, "pan.___", state 586, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 588, "(1)"
- line 416, "pan.___", state 589, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 589, "else"
- line 416, "pan.___", state 592, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 416, "pan.___", state 593, "(1)"
- line 420, "pan.___", state 600, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 602, "(1)"
- line 420, "pan.___", state 603, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 603, "else"
- line 420, "pan.___", state 606, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 420, "pan.___", state 607, "(1)"
- line 418, "pan.___", state 612, "((i<2))"
- line 418, "pan.___", state 612, "((i>=2))"
- line 425, "pan.___", state 619, "(1)"
- line 425, "pan.___", state 620, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 620, "else"
- line 425, "pan.___", state 623, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 425, "pan.___", state 624, "(1)"
- line 429, "pan.___", state 632, "(1)"
- line 429, "pan.___", state 633, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 633, "else"
- line 429, "pan.___", state 636, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 429, "pan.___", state 637, "(1)"
- line 427, "pan.___", state 642, "((i<1))"
- line 427, "pan.___", state 642, "((i>=1))"
- line 434, "pan.___", state 649, "(1)"
- line 434, "pan.___", state 650, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 650, "else"
- line 434, "pan.___", state 653, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 434, "pan.___", state 654, "(1)"
- line 438, "pan.___", state 662, "(1)"
- line 438, "pan.___", state 663, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 663, "else"
- line 438, "pan.___", state 666, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 438, "pan.___", state 667, "(1)"
- line 436, "pan.___", state 672, "((i<2))"
- line 436, "pan.___", state 672, "((i>=2))"
- line 446, "pan.___", state 676, "(1)"
- line 446, "pan.___", state 676, "(1)"
- line 687, "pan.___", state 679, "cached_urcu_active_readers = (tmp+1)"
- line 687, "pan.___", state 680, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 687, "pan.___", state 681, "(1)"
- line 407, "pan.___", state 688, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 720, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 734, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 753, "(1)"
- line 434, "pan.___", state 783, "(1)"
- line 438, "pan.___", state 796, "(1)"
- line 407, "pan.___", state 824, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 856, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 870, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 889, "(1)"
- line 434, "pan.___", state 919, "(1)"
- line 438, "pan.___", state 932, "(1)"
- line 407, "pan.___", state 953, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 955, "(1)"
- line 407, "pan.___", state 956, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 956, "else"
- line 407, "pan.___", state 959, "(1)"
- line 411, "pan.___", state 967, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 969, "(1)"
- line 411, "pan.___", state 970, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 970, "else"
- line 411, "pan.___", state 973, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 411, "pan.___", state 974, "(1)"
- line 409, "pan.___", state 979, "((i<1))"
- line 409, "pan.___", state 979, "((i>=1))"
- line 416, "pan.___", state 985, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 987, "(1)"
- line 416, "pan.___", state 988, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 988, "else"
- line 416, "pan.___", state 991, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 416, "pan.___", state 992, "(1)"
- line 420, "pan.___", state 999, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 1001, "(1)"
- line 420, "pan.___", state 1002, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 1002, "else"
- line 420, "pan.___", state 1005, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 420, "pan.___", state 1006, "(1)"
- line 418, "pan.___", state 1011, "((i<2))"
- line 418, "pan.___", state 1011, "((i>=2))"
- line 425, "pan.___", state 1018, "(1)"
- line 425, "pan.___", state 1019, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 1019, "else"
- line 425, "pan.___", state 1022, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 425, "pan.___", state 1023, "(1)"
- line 429, "pan.___", state 1031, "(1)"
- line 429, "pan.___", state 1032, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 1032, "else"
- line 429, "pan.___", state 1035, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 429, "pan.___", state 1036, "(1)"
- line 427, "pan.___", state 1041, "((i<1))"
- line 427, "pan.___", state 1041, "((i>=1))"
- line 434, "pan.___", state 1048, "(1)"
- line 434, "pan.___", state 1049, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 1049, "else"
- line 434, "pan.___", state 1052, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 434, "pan.___", state 1053, "(1)"
- line 438, "pan.___", state 1061, "(1)"
- line 438, "pan.___", state 1062, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 1062, "else"
- line 438, "pan.___", state 1065, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 438, "pan.___", state 1066, "(1)"
- line 436, "pan.___", state 1071, "((i<2))"
- line 436, "pan.___", state 1071, "((i>=2))"
- line 446, "pan.___", state 1075, "(1)"
- line 446, "pan.___", state 1075, "(1)"
- line 695, "pan.___", state 1079, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 1084, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1116, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1130, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1149, "(1)"
- line 434, "pan.___", state 1179, "(1)"
- line 438, "pan.___", state 1192, "(1)"
- line 407, "pan.___", state 1216, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1248, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1262, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1281, "(1)"
- line 434, "pan.___", state 1311, "(1)"
- line 438, "pan.___", state 1324, "(1)"
- line 407, "pan.___", state 1349, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1381, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1395, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1414, "(1)"
- line 434, "pan.___", state 1444, "(1)"
- line 438, "pan.___", state 1457, "(1)"
- line 407, "pan.___", state 1478, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1510, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1524, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1543, "(1)"
- line 434, "pan.___", state 1573, "(1)"
- line 438, "pan.___", state 1586, "(1)"
- line 407, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1644, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1658, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1677, "(1)"
- line 434, "pan.___", state 1707, "(1)"
- line 438, "pan.___", state 1720, "(1)"
- line 407, "pan.___", state 1741, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1773, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1787, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1806, "(1)"
- line 434, "pan.___", state 1836, "(1)"
- line 438, "pan.___", state 1849, "(1)"
- line 407, "pan.___", state 1873, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1905, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1919, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 1938, "(1)"
- line 434, "pan.___", state 1968, "(1)"
- line 438, "pan.___", state 1981, "(1)"
- line 734, "pan.___", state 2002, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 2009, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2041, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2055, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2074, "(1)"
- line 434, "pan.___", state 2104, "(1)"
- line 438, "pan.___", state 2117, "(1)"
- line 407, "pan.___", state 2138, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2170, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2184, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2203, "(1)"
- line 434, "pan.___", state 2233, "(1)"
- line 438, "pan.___", state 2246, "(1)"
- line 407, "pan.___", state 2269, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 2271, "(1)"
- line 407, "pan.___", state 2272, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 2272, "else"
- line 407, "pan.___", state 2275, "(1)"
- line 411, "pan.___", state 2283, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2286, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 2286, "else"
- line 411, "pan.___", state 2289, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 411, "pan.___", state 2290, "(1)"
- line 409, "pan.___", state 2295, "((i<1))"
- line 409, "pan.___", state 2295, "((i>=1))"
- line 416, "pan.___", state 2301, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2303, "(1)"
- line 416, "pan.___", state 2304, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2304, "else"
- line 416, "pan.___", state 2307, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 416, "pan.___", state 2308, "(1)"
- line 420, "pan.___", state 2315, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2317, "(1)"
- line 420, "pan.___", state 2318, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2318, "else"
- line 420, "pan.___", state 2321, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 420, "pan.___", state 2322, "(1)"
- line 418, "pan.___", state 2327, "((i<2))"
- line 418, "pan.___", state 2327, "((i>=2))"
- line 425, "pan.___", state 2334, "(1)"
- line 425, "pan.___", state 2335, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 2335, "else"
- line 425, "pan.___", state 2338, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 425, "pan.___", state 2339, "(1)"
- line 429, "pan.___", state 2347, "(1)"
- line 429, "pan.___", state 2348, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 2348, "else"
- line 429, "pan.___", state 2351, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 429, "pan.___", state 2352, "(1)"
- line 427, "pan.___", state 2357, "((i<1))"
- line 427, "pan.___", state 2357, "((i>=1))"
- line 434, "pan.___", state 2364, "(1)"
- line 434, "pan.___", state 2365, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 2365, "else"
- line 434, "pan.___", state 2368, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 434, "pan.___", state 2369, "(1)"
- line 438, "pan.___", state 2377, "(1)"
- line 438, "pan.___", state 2378, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 2378, "else"
- line 438, "pan.___", state 2381, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 438, "pan.___", state 2382, "(1)"
- line 436, "pan.___", state 2387, "((i<2))"
- line 436, "pan.___", state 2387, "((i>=2))"
- line 446, "pan.___", state 2391, "(1)"
- line 446, "pan.___", state 2391, "(1)"
- line 734, "pan.___", state 2394, "cached_urcu_active_readers = (tmp+1)"
- line 734, "pan.___", state 2395, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 734, "pan.___", state 2396, "(1)"
- line 407, "pan.___", state 2403, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2435, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2449, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2468, "(1)"
- line 434, "pan.___", state 2498, "(1)"
- line 438, "pan.___", state 2511, "(1)"
- line 407, "pan.___", state 2538, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2570, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2584, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2603, "(1)"
- line 434, "pan.___", state 2633, "(1)"
- line 438, "pan.___", state 2646, "(1)"
- line 407, "pan.___", state 2667, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2699, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2713, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 2732, "(1)"
- line 434, "pan.___", state 2762, "(1)"
- line 438, "pan.___", state 2775, "(1)"
- line 245, "pan.___", state 2808, "(1)"
- line 253, "pan.___", state 2828, "(1)"
- line 257, "pan.___", state 2836, "(1)"
- line 245, "pan.___", state 2851, "(1)"
- line 253, "pan.___", state 2871, "(1)"
- line 257, "pan.___", state 2879, "(1)"
- line 929, "pan.___", state 2896, "-end-"
- (246 of 2896 states)
-unreached in proctype urcu_writer
- line 1018, "pan.___", state 12, "((i<1))"
- line 1018, "pan.___", state 12, "((i>=1))"
- line 407, "pan.___", state 49, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 63, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 81, "cache_dirty_rcu_ptr = 0"
- line 425, "pan.___", state 114, "(1)"
- line 429, "pan.___", state 127, "(1)"
- line 434, "pan.___", state 144, "(1)"
- line 268, "pan.___", state 180, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 189, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 202, "cache_dirty_rcu_ptr = 0"
- line 407, "pan.___", state 242, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 256, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 274, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 288, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 307, "(1)"
- line 429, "pan.___", state 320, "(1)"
- line 434, "pan.___", state 337, "(1)"
- line 438, "pan.___", state 350, "(1)"
- line 411, "pan.___", state 387, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 405, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 419, "cache_dirty_rcu_data[i] = 0"
- line 429, "pan.___", state 451, "(1)"
- line 434, "pan.___", state 468, "(1)"
- line 438, "pan.___", state 481, "(1)"
- line 407, "pan.___", state 511, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 525, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 543, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 557, "cache_dirty_rcu_data[i] = 0"
- line 425, "pan.___", state 576, "(1)"
- line 429, "pan.___", state 589, "(1)"
- line 434, "pan.___", state 606, "(1)"
- line 438, "pan.___", state 619, "(1)"
- line 407, "pan.___", state 640, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 642, "(1)"
- line 407, "pan.___", state 643, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 643, "else"
- line 407, "pan.___", state 646, "(1)"
- line 411, "pan.___", state 654, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 656, "(1)"
- line 411, "pan.___", state 657, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 657, "else"
- line 411, "pan.___", state 660, "(1)"
- line 411, "pan.___", state 661, "(1)"
- line 411, "pan.___", state 661, "(1)"
- line 409, "pan.___", state 666, "((i<1))"
- line 409, "pan.___", state 666, "((i>=1))"
- line 416, "pan.___", state 672, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 674, "(1)"
- line 416, "pan.___", state 675, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 675, "else"
- line 416, "pan.___", state 678, "(1)"
- line 416, "pan.___", state 679, "(1)"
- line 416, "pan.___", state 679, "(1)"
- line 420, "pan.___", state 686, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 688, "(1)"
- line 420, "pan.___", state 689, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 689, "else"
- line 420, "pan.___", state 692, "(1)"
- line 420, "pan.___", state 693, "(1)"
- line 420, "pan.___", state 693, "(1)"
- line 418, "pan.___", state 698, "((i<2))"
- line 418, "pan.___", state 698, "((i>=2))"
- line 425, "pan.___", state 705, "(1)"
- line 425, "pan.___", state 706, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 706, "else"
- line 425, "pan.___", state 709, "(1)"
- line 425, "pan.___", state 710, "(1)"
- line 425, "pan.___", state 710, "(1)"
- line 429, "pan.___", state 718, "(1)"
- line 429, "pan.___", state 719, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 719, "else"
- line 429, "pan.___", state 722, "(1)"
- line 429, "pan.___", state 723, "(1)"
- line 429, "pan.___", state 723, "(1)"
- line 427, "pan.___", state 728, "((i<1))"
- line 427, "pan.___", state 728, "((i>=1))"
- line 434, "pan.___", state 735, "(1)"
- line 434, "pan.___", state 736, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 736, "else"
- line 434, "pan.___", state 739, "(1)"
- line 434, "pan.___", state 740, "(1)"
- line 434, "pan.___", state 740, "(1)"
- line 438, "pan.___", state 748, "(1)"
- line 438, "pan.___", state 749, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 749, "else"
- line 438, "pan.___", state 752, "(1)"
- line 438, "pan.___", state 753, "(1)"
- line 438, "pan.___", state 753, "(1)"
- line 436, "pan.___", state 758, "((i<2))"
- line 436, "pan.___", state 758, "((i>=2))"
- line 446, "pan.___", state 762, "(1)"
- line 446, "pan.___", state 762, "(1)"
- line 1184, "pan.___", state 766, "_proc_urcu_writer = (_proc_urcu_writer|(1<<10))"
- line 407, "pan.___", state 771, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 773, "(1)"
- line 407, "pan.___", state 774, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 774, "else"
- line 407, "pan.___", state 777, "(1)"
- line 411, "pan.___", state 785, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 787, "(1)"
- line 411, "pan.___", state 788, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 788, "else"
- line 411, "pan.___", state 791, "(1)"
- line 411, "pan.___", state 792, "(1)"
- line 411, "pan.___", state 792, "(1)"
- line 409, "pan.___", state 797, "((i<1))"
- line 409, "pan.___", state 797, "((i>=1))"
- line 416, "pan.___", state 803, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 805, "(1)"
- line 416, "pan.___", state 806, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 806, "else"
- line 416, "pan.___", state 809, "(1)"
- line 416, "pan.___", state 810, "(1)"
- line 416, "pan.___", state 810, "(1)"
- line 420, "pan.___", state 817, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 819, "(1)"
- line 420, "pan.___", state 820, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 820, "else"
- line 420, "pan.___", state 823, "(1)"
- line 420, "pan.___", state 824, "(1)"
- line 420, "pan.___", state 824, "(1)"
- line 418, "pan.___", state 829, "((i<2))"
- line 418, "pan.___", state 829, "((i>=2))"
- line 425, "pan.___", state 836, "(1)"
- line 425, "pan.___", state 837, "(!(cache_dirty_urcu_gp_ctr))"
- line 425, "pan.___", state 837, "else"
- line 425, "pan.___", state 840, "(1)"
- line 425, "pan.___", state 841, "(1)"
- line 425, "pan.___", state 841, "(1)"
- line 429, "pan.___", state 849, "(1)"
- line 429, "pan.___", state 850, "(!(cache_dirty_urcu_active_readers))"
- line 429, "pan.___", state 850, "else"
- line 429, "pan.___", state 853, "(1)"
- line 429, "pan.___", state 854, "(1)"
- line 429, "pan.___", state 854, "(1)"
- line 427, "pan.___", state 859, "((i<1))"
- line 427, "pan.___", state 859, "((i>=1))"
- line 434, "pan.___", state 866, "(1)"
- line 434, "pan.___", state 867, "(!(cache_dirty_rcu_ptr))"
- line 434, "pan.___", state 867, "else"
- line 434, "pan.___", state 870, "(1)"
- line 434, "pan.___", state 871, "(1)"
- line 434, "pan.___", state 871, "(1)"
- line 438, "pan.___", state 879, "(1)"
- line 438, "pan.___", state 880, "(!(cache_dirty_rcu_data[i]))"
- line 438, "pan.___", state 880, "else"
- line 438, "pan.___", state 883, "(1)"
- line 438, "pan.___", state 884, "(1)"
- line 438, "pan.___", state 884, "(1)"
- line 436, "pan.___", state 889, "((i<2))"
- line 436, "pan.___", state 889, "((i>=2))"
- line 446, "pan.___", state 893, "(1)"
- line 446, "pan.___", state 893, "(1)"
- line 1200, "pan.___", state 898, "_proc_urcu_writer = (_proc_urcu_writer|(1<<11))"
- line 1195, "pan.___", state 899, "(((tmp2&((1<<7)-1))&&((tmp2^0)&(1<<7))))"
- line 1195, "pan.___", state 899, "else"
- line 1220, "pan.___", state 903, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<12)|(1<<11))))"
- line 268, "pan.___", state 934, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 943, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 958, "(1)"
- line 280, "pan.___", state 965, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 981, "(1)"
- line 249, "pan.___", state 989, "(1)"
- line 253, "pan.___", state 1001, "(1)"
- line 257, "pan.___", state 1009, "(1)"
- line 268, "pan.___", state 1040, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1049, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1062, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1071, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1087, "(1)"
- line 249, "pan.___", state 1095, "(1)"
- line 253, "pan.___", state 1107, "(1)"
- line 257, "pan.___", state 1115, "(1)"
- line 272, "pan.___", state 1141, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1154, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1163, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1179, "(1)"
- line 249, "pan.___", state 1187, "(1)"
- line 253, "pan.___", state 1199, "(1)"
- line 257, "pan.___", state 1207, "(1)"
- line 268, "pan.___", state 1238, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1247, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1260, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1269, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1285, "(1)"
- line 249, "pan.___", state 1293, "(1)"
- line 253, "pan.___", state 1305, "(1)"
- line 257, "pan.___", state 1313, "(1)"
- line 268, "pan.___", state 1330, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1332, "(1)"
- line 272, "pan.___", state 1339, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1341, "(1)"
- line 272, "pan.___", state 1342, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1342, "else"
- line 270, "pan.___", state 1347, "((i<1))"
- line 270, "pan.___", state 1347, "((i>=1))"
- line 276, "pan.___", state 1352, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1354, "(1)"
- line 276, "pan.___", state 1355, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1355, "else"
- line 280, "pan.___", state 1361, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1363, "(1)"
- line 280, "pan.___", state 1364, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1364, "else"
- line 278, "pan.___", state 1369, "((i<2))"
- line 278, "pan.___", state 1369, "((i>=2))"
- line 245, "pan.___", state 1377, "(1)"
- line 249, "pan.___", state 1385, "(1)"
- line 249, "pan.___", state 1386, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1386, "else"
- line 247, "pan.___", state 1391, "((i<1))"
- line 247, "pan.___", state 1391, "((i>=1))"
- line 253, "pan.___", state 1397, "(1)"
- line 253, "pan.___", state 1398, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1398, "else"
- line 257, "pan.___", state 1405, "(1)"
- line 257, "pan.___", state 1406, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1406, "else"
- line 262, "pan.___", state 1415, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1415, "else"
- line 1296, "pan.___", state 1418, "i = 0"
- line 1296, "pan.___", state 1420, "reader_barrier = 1"
- line 1296, "pan.___", state 1431, "((i<1))"
- line 1296, "pan.___", state 1431, "((i>=1))"
- line 268, "pan.___", state 1436, "cache_dirty_urcu_gp_ctr = 0"
- line 268, "pan.___", state 1438, "(1)"
- line 272, "pan.___", state 1445, "cache_dirty_urcu_active_readers = 0"
- line 272, "pan.___", state 1447, "(1)"
- line 272, "pan.___", state 1448, "(cache_dirty_urcu_active_readers)"
- line 272, "pan.___", state 1448, "else"
- line 270, "pan.___", state 1453, "((i<1))"
- line 270, "pan.___", state 1453, "((i>=1))"
- line 276, "pan.___", state 1458, "cache_dirty_rcu_ptr = 0"
- line 276, "pan.___", state 1460, "(1)"
- line 276, "pan.___", state 1461, "(cache_dirty_rcu_ptr)"
- line 276, "pan.___", state 1461, "else"
- line 280, "pan.___", state 1467, "cache_dirty_rcu_data[i] = 0"
- line 280, "pan.___", state 1469, "(1)"
- line 280, "pan.___", state 1470, "(cache_dirty_rcu_data[i])"
- line 280, "pan.___", state 1470, "else"
- line 278, "pan.___", state 1475, "((i<2))"
- line 278, "pan.___", state 1475, "((i>=2))"
- line 245, "pan.___", state 1483, "(1)"
- line 249, "pan.___", state 1491, "(1)"
- line 249, "pan.___", state 1492, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 1492, "else"
- line 247, "pan.___", state 1497, "((i<1))"
- line 247, "pan.___", state 1497, "((i>=1))"
- line 253, "pan.___", state 1503, "(1)"
- line 253, "pan.___", state 1504, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 1504, "else"
- line 257, "pan.___", state 1511, "(1)"
- line 257, "pan.___", state 1512, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 1512, "else"
- line 262, "pan.___", state 1521, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 1521, "else"
- line 295, "pan.___", state 1523, "(cache_dirty_urcu_gp_ctr)"
- line 295, "pan.___", state 1523, "else"
- line 1296, "pan.___", state 1524, "(cache_dirty_urcu_gp_ctr)"
- line 1296, "pan.___", state 1524, "else"
- line 272, "pan.___", state 1537, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1550, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1559, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1575, "(1)"
- line 249, "pan.___", state 1583, "(1)"
- line 253, "pan.___", state 1595, "(1)"
- line 257, "pan.___", state 1603, "(1)"
- line 268, "pan.___", state 1634, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1643, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1656, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1665, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1681, "(1)"
- line 249, "pan.___", state 1689, "(1)"
- line 253, "pan.___", state 1701, "(1)"
- line 257, "pan.___", state 1709, "(1)"
- line 1304, "pan.___", state 1725, "-end-"
- (212 of 1725 states)
-unreached in proctype :init:
- line 1319, "pan.___", state 13, "((i<1))"
- line 1319, "pan.___", state 13, "((i>=1))"
- (1 of 28 states)
-unreached in proctype :never:
- line 1367, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.71e+04 seconds
-pan: rate 2490.8226 states/second
-pan: avg transition delay 1.5631e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-ipi'
+++ /dev/null
-#define SINGLE_FLIP
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 4773 States= 1e+06 Transitions= 6.22e+08 Memory= 542.717 t= 624 R= 2e+03
-Depth= 5040 States= 2e+06 Transitions= 1.3e+09 Memory= 618.986 t= 1.33e+03 R= 1e+03
-Depth= 5040 States= 3e+06 Transitions= 1.95e+09 Memory= 695.256 t= 2.03e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 5040 States= 4e+06 Transitions= 2.64e+09 Memory= 802.647 t= 2.73e+03 R= 1e+03
-Depth= 5040 States= 5e+06 Transitions= 3.3e+09 Memory= 878.916 t= 3.41e+03 R= 1e+03
-Depth= 5141 States= 6e+06 Transitions= 3.99e+09 Memory= 955.186 t= 4.12e+03 R= 1e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 72 byte, depth reached 5141, errors: 0
- 6711104 states, stored
-4.4393201e+09 states, matched
-4.4460312e+09 transitions (= stored+matched)
-2.5322962e+10 atomic steps
-hash conflicts: 3.3332015e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 640.021 equivalent memory usage for states (stored*(State-vector + overhead))
- 519.783 actual memory usage for states (compression: 81.21%)
- state-vector as stored = 53 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 1009.483 total actual memory usage
-
-unreached in proctype urcu_reader
- line 410, ".input.spin", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 82, "(1)"
- line 437, ".input.spin", state 112, "(1)"
- line 441, ".input.spin", state 125, "(1)"
- line 596, ".input.spin", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 410, ".input.spin", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 218, "(1)"
- line 437, ".input.spin", state 248, "(1)"
- line 441, ".input.spin", state 261, "(1)"
- line 410, ".input.spin", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 347, "(1)"
- line 437, ".input.spin", state 377, "(1)"
- line 441, ".input.spin", state 390, "(1)"
- line 410, ".input.spin", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 415, "(1)"
- line 410, ".input.spin", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, ".input.spin", state 416, "else"
- line 410, ".input.spin", state 419, "(1)"
- line 414, ".input.spin", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 429, "(1)"
- line 414, ".input.spin", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, ".input.spin", state 430, "else"
- line 414, ".input.spin", state 433, "(1)"
- line 414, ".input.spin", state 434, "(1)"
- line 414, ".input.spin", state 434, "(1)"
- line 412, ".input.spin", state 439, "((i<1))"
- line 412, ".input.spin", state 439, "((i>=1))"
- line 419, ".input.spin", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 447, "(1)"
- line 419, ".input.spin", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, ".input.spin", state 448, "else"
- line 419, ".input.spin", state 451, "(1)"
- line 419, ".input.spin", state 452, "(1)"
- line 419, ".input.spin", state 452, "(1)"
- line 423, ".input.spin", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 461, "(1)"
- line 423, ".input.spin", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, ".input.spin", state 462, "else"
- line 423, ".input.spin", state 465, "(1)"
- line 423, ".input.spin", state 466, "(1)"
- line 423, ".input.spin", state 466, "(1)"
- line 421, ".input.spin", state 471, "((i<2))"
- line 421, ".input.spin", state 471, "((i>=2))"
- line 428, ".input.spin", state 478, "(1)"
- line 428, ".input.spin", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 428, ".input.spin", state 479, "else"
- line 428, ".input.spin", state 482, "(1)"
- line 428, ".input.spin", state 483, "(1)"
- line 428, ".input.spin", state 483, "(1)"
- line 432, ".input.spin", state 491, "(1)"
- line 432, ".input.spin", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 432, ".input.spin", state 492, "else"
- line 432, ".input.spin", state 495, "(1)"
- line 432, ".input.spin", state 496, "(1)"
- line 432, ".input.spin", state 496, "(1)"
- line 430, ".input.spin", state 501, "((i<1))"
- line 430, ".input.spin", state 501, "((i>=1))"
- line 437, ".input.spin", state 508, "(1)"
- line 437, ".input.spin", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 437, ".input.spin", state 509, "else"
- line 437, ".input.spin", state 512, "(1)"
- line 437, ".input.spin", state 513, "(1)"
- line 437, ".input.spin", state 513, "(1)"
- line 441, ".input.spin", state 521, "(1)"
- line 441, ".input.spin", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 441, ".input.spin", state 522, "else"
- line 441, ".input.spin", state 525, "(1)"
- line 441, ".input.spin", state 526, "(1)"
- line 441, ".input.spin", state 526, "(1)"
- line 439, ".input.spin", state 531, "((i<2))"
- line 439, ".input.spin", state 531, "((i>=2))"
- line 449, ".input.spin", state 535, "(1)"
- line 449, ".input.spin", state 535, "(1)"
- line 596, ".input.spin", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 596, ".input.spin", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 596, ".input.spin", state 540, "(1)"
- line 271, ".input.spin", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 555, "(1)"
- line 279, ".input.spin", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 591, "(1)"
- line 252, ".input.spin", state 599, "(1)"
- line 256, ".input.spin", state 611, "(1)"
- line 260, ".input.spin", state 619, "(1)"
- line 410, ".input.spin", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 702, "(1)"
- line 432, ".input.spin", state 715, "(1)"
- line 437, ".input.spin", state 732, "(1)"
- line 441, ".input.spin", state 745, "(1)"
- line 410, ".input.spin", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 838, "(1)"
- line 437, ".input.spin", state 868, "(1)"
- line 441, ".input.spin", state 881, "(1)"
- line 410, ".input.spin", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 904, "(1)"
- line 410, ".input.spin", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, ".input.spin", state 905, "else"
- line 410, ".input.spin", state 908, "(1)"
- line 414, ".input.spin", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 918, "(1)"
- line 414, ".input.spin", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, ".input.spin", state 919, "else"
- line 414, ".input.spin", state 922, "(1)"
- line 414, ".input.spin", state 923, "(1)"
- line 414, ".input.spin", state 923, "(1)"
- line 412, ".input.spin", state 928, "((i<1))"
- line 412, ".input.spin", state 928, "((i>=1))"
- line 419, ".input.spin", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 936, "(1)"
- line 419, ".input.spin", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, ".input.spin", state 937, "else"
- line 419, ".input.spin", state 940, "(1)"
- line 419, ".input.spin", state 941, "(1)"
- line 419, ".input.spin", state 941, "(1)"
- line 423, ".input.spin", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 950, "(1)"
- line 423, ".input.spin", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, ".input.spin", state 951, "else"
- line 423, ".input.spin", state 954, "(1)"
- line 423, ".input.spin", state 955, "(1)"
- line 423, ".input.spin", state 955, "(1)"
- line 421, ".input.spin", state 960, "((i<2))"
- line 421, ".input.spin", state 960, "((i>=2))"
- line 428, ".input.spin", state 967, "(1)"
- line 428, ".input.spin", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 428, ".input.spin", state 968, "else"
- line 428, ".input.spin", state 971, "(1)"
- line 428, ".input.spin", state 972, "(1)"
- line 428, ".input.spin", state 972, "(1)"
- line 432, ".input.spin", state 980, "(1)"
- line 432, ".input.spin", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 432, ".input.spin", state 981, "else"
- line 432, ".input.spin", state 984, "(1)"
- line 432, ".input.spin", state 985, "(1)"
- line 432, ".input.spin", state 985, "(1)"
- line 430, ".input.spin", state 990, "((i<1))"
- line 430, ".input.spin", state 990, "((i>=1))"
- line 437, ".input.spin", state 997, "(1)"
- line 437, ".input.spin", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 437, ".input.spin", state 998, "else"
- line 437, ".input.spin", state 1001, "(1)"
- line 437, ".input.spin", state 1002, "(1)"
- line 437, ".input.spin", state 1002, "(1)"
- line 441, ".input.spin", state 1010, "(1)"
- line 441, ".input.spin", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 441, ".input.spin", state 1011, "else"
- line 441, ".input.spin", state 1014, "(1)"
- line 441, ".input.spin", state 1015, "(1)"
- line 441, ".input.spin", state 1015, "(1)"
- line 439, ".input.spin", state 1020, "((i<2))"
- line 439, ".input.spin", state 1020, "((i>=2))"
- line 449, ".input.spin", state 1024, "(1)"
- line 449, ".input.spin", state 1024, "(1)"
- line 604, ".input.spin", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 410, ".input.spin", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1098, "(1)"
- line 432, ".input.spin", state 1111, "(1)"
- line 437, ".input.spin", state 1128, "(1)"
- line 441, ".input.spin", state 1141, "(1)"
- line 410, ".input.spin", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1230, "(1)"
- line 437, ".input.spin", state 1260, "(1)"
- line 441, ".input.spin", state 1273, "(1)"
- line 410, ".input.spin", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1363, "(1)"
- line 437, ".input.spin", state 1393, "(1)"
- line 441, ".input.spin", state 1406, "(1)"
- line 410, ".input.spin", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1492, "(1)"
- line 437, ".input.spin", state 1522, "(1)"
- line 441, ".input.spin", state 1535, "(1)"
- line 271, ".input.spin", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1605, "(1)"
- line 252, ".input.spin", state 1613, "(1)"
- line 256, ".input.spin", state 1625, "(1)"
- line 260, ".input.spin", state 1633, "(1)"
- line 410, ".input.spin", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1716, "(1)"
- line 432, ".input.spin", state 1729, "(1)"
- line 437, ".input.spin", state 1746, "(1)"
- line 441, ".input.spin", state 1759, "(1)"
- line 410, ".input.spin", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1845, "(1)"
- line 432, ".input.spin", state 1858, "(1)"
- line 437, ".input.spin", state 1875, "(1)"
- line 441, ".input.spin", state 1888, "(1)"
- line 410, ".input.spin", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 1977, "(1)"
- line 437, ".input.spin", state 2007, "(1)"
- line 441, ".input.spin", state 2020, "(1)"
- line 643, ".input.spin", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 410, ".input.spin", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 2113, "(1)"
- line 437, ".input.spin", state 2143, "(1)"
- line 441, ".input.spin", state 2156, "(1)"
- line 410, ".input.spin", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 2242, "(1)"
- line 437, ".input.spin", state 2272, "(1)"
- line 441, ".input.spin", state 2285, "(1)"
- line 410, ".input.spin", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 2310, "(1)"
- line 410, ".input.spin", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, ".input.spin", state 2311, "else"
- line 410, ".input.spin", state 2314, "(1)"
- line 414, ".input.spin", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2324, "(1)"
- line 414, ".input.spin", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, ".input.spin", state 2325, "else"
- line 414, ".input.spin", state 2328, "(1)"
- line 414, ".input.spin", state 2329, "(1)"
- line 414, ".input.spin", state 2329, "(1)"
- line 412, ".input.spin", state 2334, "((i<1))"
- line 412, ".input.spin", state 2334, "((i>=1))"
- line 419, ".input.spin", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2342, "(1)"
- line 419, ".input.spin", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, ".input.spin", state 2343, "else"
- line 419, ".input.spin", state 2346, "(1)"
- line 419, ".input.spin", state 2347, "(1)"
- line 419, ".input.spin", state 2347, "(1)"
- line 423, ".input.spin", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2356, "(1)"
- line 423, ".input.spin", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, ".input.spin", state 2357, "else"
- line 423, ".input.spin", state 2360, "(1)"
- line 423, ".input.spin", state 2361, "(1)"
- line 423, ".input.spin", state 2361, "(1)"
- line 421, ".input.spin", state 2366, "((i<2))"
- line 421, ".input.spin", state 2366, "((i>=2))"
- line 428, ".input.spin", state 2373, "(1)"
- line 428, ".input.spin", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 428, ".input.spin", state 2374, "else"
- line 428, ".input.spin", state 2377, "(1)"
- line 428, ".input.spin", state 2378, "(1)"
- line 428, ".input.spin", state 2378, "(1)"
- line 432, ".input.spin", state 2386, "(1)"
- line 432, ".input.spin", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 432, ".input.spin", state 2387, "else"
- line 432, ".input.spin", state 2390, "(1)"
- line 432, ".input.spin", state 2391, "(1)"
- line 432, ".input.spin", state 2391, "(1)"
- line 430, ".input.spin", state 2396, "((i<1))"
- line 430, ".input.spin", state 2396, "((i>=1))"
- line 437, ".input.spin", state 2403, "(1)"
- line 437, ".input.spin", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 437, ".input.spin", state 2404, "else"
- line 437, ".input.spin", state 2407, "(1)"
- line 437, ".input.spin", state 2408, "(1)"
- line 437, ".input.spin", state 2408, "(1)"
- line 441, ".input.spin", state 2416, "(1)"
- line 441, ".input.spin", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 441, ".input.spin", state 2417, "else"
- line 441, ".input.spin", state 2420, "(1)"
- line 441, ".input.spin", state 2421, "(1)"
- line 441, ".input.spin", state 2421, "(1)"
- line 439, ".input.spin", state 2426, "((i<2))"
- line 439, ".input.spin", state 2426, "((i>=2))"
- line 449, ".input.spin", state 2430, "(1)"
- line 449, ".input.spin", state 2430, "(1)"
- line 643, ".input.spin", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 643, ".input.spin", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 643, ".input.spin", state 2435, "(1)"
- line 271, ".input.spin", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2486, "(1)"
- line 252, ".input.spin", state 2494, "(1)"
- line 256, ".input.spin", state 2506, "(1)"
- line 260, ".input.spin", state 2514, "(1)"
- line 410, ".input.spin", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 2597, "(1)"
- line 432, ".input.spin", state 2610, "(1)"
- line 437, ".input.spin", state 2627, "(1)"
- line 441, ".input.spin", state 2640, "(1)"
- line 271, ".input.spin", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2711, "(1)"
- line 252, ".input.spin", state 2719, "(1)"
- line 256, ".input.spin", state 2731, "(1)"
- line 260, ".input.spin", state 2739, "(1)"
- line 410, ".input.spin", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 2822, "(1)"
- line 432, ".input.spin", state 2835, "(1)"
- line 437, ".input.spin", state 2852, "(1)"
- line 441, ".input.spin", state 2865, "(1)"
- line 410, ".input.spin", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 2951, "(1)"
- line 432, ".input.spin", state 2964, "(1)"
- line 437, ".input.spin", state 2981, "(1)"
- line 441, ".input.spin", state 2994, "(1)"
- line 248, ".input.spin", state 3027, "(1)"
- line 256, ".input.spin", state 3047, "(1)"
- line 260, ".input.spin", state 3055, "(1)"
- line 248, ".input.spin", state 3070, "(1)"
- line 252, ".input.spin", state 3078, "(1)"
- line 256, ".input.spin", state 3090, "(1)"
- line 260, ".input.spin", state 3098, "(1)"
- line 897, ".input.spin", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 410, ".input.spin", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 83, "(1)"
- line 432, ".input.spin", state 96, "(1)"
- line 437, ".input.spin", state 113, "(1)"
- line 271, ".input.spin", state 149, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 158, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 225, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 243, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 257, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, ".input.spin", state 276, "(1)"
- line 432, ".input.spin", state 289, "(1)"
- line 437, ".input.spin", state 306, "(1)"
- line 441, ".input.spin", state 319, "(1)"
- line 414, ".input.spin", state 356, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 374, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 388, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, ".input.spin", state 420, "(1)"
- line 437, ".input.spin", state 437, "(1)"
- line 441, ".input.spin", state 450, "(1)"
- line 414, ".input.spin", state 495, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 513, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, ".input.spin", state 559, "(1)"
- line 437, ".input.spin", state 576, "(1)"
- line 441, ".input.spin", state 589, "(1)"
- line 414, ".input.spin", state 624, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 642, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 656, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, ".input.spin", state 688, "(1)"
- line 437, ".input.spin", state 705, "(1)"
- line 441, ".input.spin", state 718, "(1)"
- line 414, ".input.spin", state 755, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 773, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 787, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, ".input.spin", state 819, "(1)"
- line 437, ".input.spin", state 836, "(1)"
- line 441, ".input.spin", state 849, "(1)"
- line 271, ".input.spin", state 904, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 913, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 928, "(1)"
- line 283, ".input.spin", state 935, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 951, "(1)"
- line 252, ".input.spin", state 959, "(1)"
- line 256, ".input.spin", state 971, "(1)"
- line 260, ".input.spin", state 979, "(1)"
- line 275, ".input.spin", state 1004, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1017, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1026, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1042, "(1)"
- line 252, ".input.spin", state 1050, "(1)"
- line 256, ".input.spin", state 1062, "(1)"
- line 260, ".input.spin", state 1070, "(1)"
- line 275, ".input.spin", state 1095, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1108, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1117, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1133, "(1)"
- line 252, ".input.spin", state 1141, "(1)"
- line 256, ".input.spin", state 1153, "(1)"
- line 260, ".input.spin", state 1161, "(1)"
- line 275, ".input.spin", state 1186, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1199, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1208, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1224, "(1)"
- line 252, ".input.spin", state 1232, "(1)"
- line 256, ".input.spin", state 1244, "(1)"
- line 260, ".input.spin", state 1252, "(1)"
- line 1236, ".input.spin", state 1267, "-end-"
- (71 of 1267 states)
-unreached in proctype :init:
- (0 of 78 states)
-
-pan: elapsed time 4.59e+03 seconds
-pan: rate 1460.6376 states/second
-pan: avg transition delay 1.0334e-06 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1294)
-Depth= 5182 States= 1e+06 Transitions= 6.22e+08 Memory= 550.432 t= 762 R= 1e+03
-Depth= 5473 States= 2e+06 Transitions= 1.3e+09 Memory= 634.318 t= 1.62e+03 R= 1e+03
-Depth= 5473 States= 3e+06 Transitions= 1.95e+09 Memory= 718.303 t= 2.47e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 5473 States= 4e+06 Transitions= 2.64e+09 Memory= 833.311 t= 3.32e+03 R= 1e+03
-Depth= 5473 States= 5e+06 Transitions= 3.3e+09 Memory= 917.295 t= 4.14e+03 R= 1e+03
-Depth= 5582 States= 6e+06 Transitions= 3.99e+09 Memory= 1001.279 t= 5e+03 R= 1e+03
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5582, errors: 0
- 6711104 states, stored
-4.4393362e+09 states, matched
-4.4460473e+09 transitions (= stored+matched)
-2.5322962e+10 atomic steps
-hash conflicts: 3.3328749e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 742.424 equivalent memory usage for states (stored*(State-vector + overhead))
- 571.575 actual memory usage for states (compression: 76.99%)
- state-vector as stored = 61 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 1060.947 total actual memory usage
-
-unreached in proctype urcu_reader
- line 410, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 82, "(1)"
- line 437, "pan.___", state 112, "(1)"
- line 441, "pan.___", state 125, "(1)"
- line 596, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 410, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 218, "(1)"
- line 437, "pan.___", state 248, "(1)"
- line 441, "pan.___", state 261, "(1)"
- line 410, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 347, "(1)"
- line 437, "pan.___", state 377, "(1)"
- line 441, "pan.___", state 390, "(1)"
- line 410, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 415, "(1)"
- line 410, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 416, "else"
- line 410, "pan.___", state 419, "(1)"
- line 414, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 429, "(1)"
- line 414, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 430, "else"
- line 414, "pan.___", state 433, "(1)"
- line 414, "pan.___", state 434, "(1)"
- line 414, "pan.___", state 434, "(1)"
- line 412, "pan.___", state 439, "((i<1))"
- line 412, "pan.___", state 439, "((i>=1))"
- line 419, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 447, "(1)"
- line 419, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 448, "else"
- line 419, "pan.___", state 451, "(1)"
- line 419, "pan.___", state 452, "(1)"
- line 419, "pan.___", state 452, "(1)"
- line 423, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 461, "(1)"
- line 423, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 462, "else"
- line 423, "pan.___", state 465, "(1)"
- line 423, "pan.___", state 466, "(1)"
- line 423, "pan.___", state 466, "(1)"
- line 421, "pan.___", state 471, "((i<2))"
- line 421, "pan.___", state 471, "((i>=2))"
- line 428, "pan.___", state 478, "(1)"
- line 428, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 428, "pan.___", state 479, "else"
- line 428, "pan.___", state 482, "(1)"
- line 428, "pan.___", state 483, "(1)"
- line 428, "pan.___", state 483, "(1)"
- line 432, "pan.___", state 491, "(1)"
- line 432, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 432, "pan.___", state 492, "else"
- line 432, "pan.___", state 495, "(1)"
- line 432, "pan.___", state 496, "(1)"
- line 432, "pan.___", state 496, "(1)"
- line 430, "pan.___", state 501, "((i<1))"
- line 430, "pan.___", state 501, "((i>=1))"
- line 437, "pan.___", state 508, "(1)"
- line 437, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 437, "pan.___", state 509, "else"
- line 437, "pan.___", state 512, "(1)"
- line 437, "pan.___", state 513, "(1)"
- line 437, "pan.___", state 513, "(1)"
- line 441, "pan.___", state 521, "(1)"
- line 441, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 441, "pan.___", state 522, "else"
- line 441, "pan.___", state 525, "(1)"
- line 441, "pan.___", state 526, "(1)"
- line 441, "pan.___", state 526, "(1)"
- line 439, "pan.___", state 531, "((i<2))"
- line 439, "pan.___", state 531, "((i>=2))"
- line 449, "pan.___", state 535, "(1)"
- line 449, "pan.___", state 535, "(1)"
- line 596, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 596, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 596, "pan.___", state 540, "(1)"
- line 271, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 555, "(1)"
- line 279, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 591, "(1)"
- line 252, "pan.___", state 599, "(1)"
- line 256, "pan.___", state 611, "(1)"
- line 260, "pan.___", state 619, "(1)"
- line 410, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 702, "(1)"
- line 432, "pan.___", state 715, "(1)"
- line 437, "pan.___", state 732, "(1)"
- line 441, "pan.___", state 745, "(1)"
- line 410, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 838, "(1)"
- line 437, "pan.___", state 868, "(1)"
- line 441, "pan.___", state 881, "(1)"
- line 410, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 904, "(1)"
- line 410, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 905, "else"
- line 410, "pan.___", state 908, "(1)"
- line 414, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 918, "(1)"
- line 414, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 919, "else"
- line 414, "pan.___", state 922, "(1)"
- line 414, "pan.___", state 923, "(1)"
- line 414, "pan.___", state 923, "(1)"
- line 412, "pan.___", state 928, "((i<1))"
- line 412, "pan.___", state 928, "((i>=1))"
- line 419, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 936, "(1)"
- line 419, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 937, "else"
- line 419, "pan.___", state 940, "(1)"
- line 419, "pan.___", state 941, "(1)"
- line 419, "pan.___", state 941, "(1)"
- line 423, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 950, "(1)"
- line 423, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 951, "else"
- line 423, "pan.___", state 954, "(1)"
- line 423, "pan.___", state 955, "(1)"
- line 423, "pan.___", state 955, "(1)"
- line 421, "pan.___", state 960, "((i<2))"
- line 421, "pan.___", state 960, "((i>=2))"
- line 428, "pan.___", state 967, "(1)"
- line 428, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 428, "pan.___", state 968, "else"
- line 428, "pan.___", state 971, "(1)"
- line 428, "pan.___", state 972, "(1)"
- line 428, "pan.___", state 972, "(1)"
- line 432, "pan.___", state 980, "(1)"
- line 432, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 432, "pan.___", state 981, "else"
- line 432, "pan.___", state 984, "(1)"
- line 432, "pan.___", state 985, "(1)"
- line 432, "pan.___", state 985, "(1)"
- line 430, "pan.___", state 990, "((i<1))"
- line 430, "pan.___", state 990, "((i>=1))"
- line 437, "pan.___", state 997, "(1)"
- line 437, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 437, "pan.___", state 998, "else"
- line 437, "pan.___", state 1001, "(1)"
- line 437, "pan.___", state 1002, "(1)"
- line 437, "pan.___", state 1002, "(1)"
- line 441, "pan.___", state 1010, "(1)"
- line 441, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 441, "pan.___", state 1011, "else"
- line 441, "pan.___", state 1014, "(1)"
- line 441, "pan.___", state 1015, "(1)"
- line 441, "pan.___", state 1015, "(1)"
- line 439, "pan.___", state 1020, "((i<2))"
- line 439, "pan.___", state 1020, "((i>=2))"
- line 449, "pan.___", state 1024, "(1)"
- line 449, "pan.___", state 1024, "(1)"
- line 604, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 410, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1098, "(1)"
- line 432, "pan.___", state 1111, "(1)"
- line 437, "pan.___", state 1128, "(1)"
- line 441, "pan.___", state 1141, "(1)"
- line 410, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1230, "(1)"
- line 437, "pan.___", state 1260, "(1)"
- line 441, "pan.___", state 1273, "(1)"
- line 410, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1363, "(1)"
- line 437, "pan.___", state 1393, "(1)"
- line 441, "pan.___", state 1406, "(1)"
- line 410, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1492, "(1)"
- line 437, "pan.___", state 1522, "(1)"
- line 441, "pan.___", state 1535, "(1)"
- line 271, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1605, "(1)"
- line 252, "pan.___", state 1613, "(1)"
- line 256, "pan.___", state 1625, "(1)"
- line 260, "pan.___", state 1633, "(1)"
- line 410, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1716, "(1)"
- line 432, "pan.___", state 1729, "(1)"
- line 437, "pan.___", state 1746, "(1)"
- line 441, "pan.___", state 1759, "(1)"
- line 410, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1845, "(1)"
- line 432, "pan.___", state 1858, "(1)"
- line 437, "pan.___", state 1875, "(1)"
- line 441, "pan.___", state 1888, "(1)"
- line 410, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 1977, "(1)"
- line 437, "pan.___", state 2007, "(1)"
- line 441, "pan.___", state 2020, "(1)"
- line 643, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 410, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 2113, "(1)"
- line 437, "pan.___", state 2143, "(1)"
- line 441, "pan.___", state 2156, "(1)"
- line 410, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 2242, "(1)"
- line 437, "pan.___", state 2272, "(1)"
- line 441, "pan.___", state 2285, "(1)"
- line 410, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 2310, "(1)"
- line 410, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 2311, "else"
- line 410, "pan.___", state 2314, "(1)"
- line 414, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2324, "(1)"
- line 414, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 2325, "else"
- line 414, "pan.___", state 2328, "(1)"
- line 414, "pan.___", state 2329, "(1)"
- line 414, "pan.___", state 2329, "(1)"
- line 412, "pan.___", state 2334, "((i<1))"
- line 412, "pan.___", state 2334, "((i>=1))"
- line 419, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2342, "(1)"
- line 419, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 2343, "else"
- line 419, "pan.___", state 2346, "(1)"
- line 419, "pan.___", state 2347, "(1)"
- line 419, "pan.___", state 2347, "(1)"
- line 423, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2356, "(1)"
- line 423, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 2357, "else"
- line 423, "pan.___", state 2360, "(1)"
- line 423, "pan.___", state 2361, "(1)"
- line 423, "pan.___", state 2361, "(1)"
- line 421, "pan.___", state 2366, "((i<2))"
- line 421, "pan.___", state 2366, "((i>=2))"
- line 428, "pan.___", state 2373, "(1)"
- line 428, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 428, "pan.___", state 2374, "else"
- line 428, "pan.___", state 2377, "(1)"
- line 428, "pan.___", state 2378, "(1)"
- line 428, "pan.___", state 2378, "(1)"
- line 432, "pan.___", state 2386, "(1)"
- line 432, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 432, "pan.___", state 2387, "else"
- line 432, "pan.___", state 2390, "(1)"
- line 432, "pan.___", state 2391, "(1)"
- line 432, "pan.___", state 2391, "(1)"
- line 430, "pan.___", state 2396, "((i<1))"
- line 430, "pan.___", state 2396, "((i>=1))"
- line 437, "pan.___", state 2403, "(1)"
- line 437, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 437, "pan.___", state 2404, "else"
- line 437, "pan.___", state 2407, "(1)"
- line 437, "pan.___", state 2408, "(1)"
- line 437, "pan.___", state 2408, "(1)"
- line 441, "pan.___", state 2416, "(1)"
- line 441, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 441, "pan.___", state 2417, "else"
- line 441, "pan.___", state 2420, "(1)"
- line 441, "pan.___", state 2421, "(1)"
- line 441, "pan.___", state 2421, "(1)"
- line 439, "pan.___", state 2426, "((i<2))"
- line 439, "pan.___", state 2426, "((i>=2))"
- line 449, "pan.___", state 2430, "(1)"
- line 449, "pan.___", state 2430, "(1)"
- line 643, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 643, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 643, "pan.___", state 2435, "(1)"
- line 271, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2486, "(1)"
- line 252, "pan.___", state 2494, "(1)"
- line 256, "pan.___", state 2506, "(1)"
- line 260, "pan.___", state 2514, "(1)"
- line 410, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 2597, "(1)"
- line 432, "pan.___", state 2610, "(1)"
- line 437, "pan.___", state 2627, "(1)"
- line 441, "pan.___", state 2640, "(1)"
- line 271, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2711, "(1)"
- line 252, "pan.___", state 2719, "(1)"
- line 256, "pan.___", state 2731, "(1)"
- line 260, "pan.___", state 2739, "(1)"
- line 410, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 2822, "(1)"
- line 432, "pan.___", state 2835, "(1)"
- line 437, "pan.___", state 2852, "(1)"
- line 441, "pan.___", state 2865, "(1)"
- line 410, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 2951, "(1)"
- line 432, "pan.___", state 2964, "(1)"
- line 437, "pan.___", state 2981, "(1)"
- line 441, "pan.___", state 2994, "(1)"
- line 248, "pan.___", state 3027, "(1)"
- line 256, "pan.___", state 3047, "(1)"
- line 260, "pan.___", state 3055, "(1)"
- line 248, "pan.___", state 3070, "(1)"
- line 252, "pan.___", state 3078, "(1)"
- line 256, "pan.___", state 3090, "(1)"
- line 260, "pan.___", state 3098, "(1)"
- line 897, "pan.___", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 410, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 83, "(1)"
- line 432, "pan.___", state 96, "(1)"
- line 437, "pan.___", state 113, "(1)"
- line 271, "pan.___", state 149, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 158, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 225, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 243, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 257, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 428, "pan.___", state 276, "(1)"
- line 432, "pan.___", state 289, "(1)"
- line 437, "pan.___", state 306, "(1)"
- line 441, "pan.___", state 319, "(1)"
- line 414, "pan.___", state 356, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 374, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 388, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, "pan.___", state 420, "(1)"
- line 437, "pan.___", state 437, "(1)"
- line 441, "pan.___", state 450, "(1)"
- line 414, "pan.___", state 495, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 513, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, "pan.___", state 559, "(1)"
- line 437, "pan.___", state 576, "(1)"
- line 441, "pan.___", state 589, "(1)"
- line 414, "pan.___", state 624, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 642, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 656, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, "pan.___", state 688, "(1)"
- line 437, "pan.___", state 705, "(1)"
- line 441, "pan.___", state 718, "(1)"
- line 414, "pan.___", state 755, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 773, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 787, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 432, "pan.___", state 819, "(1)"
- line 437, "pan.___", state 836, "(1)"
- line 441, "pan.___", state 849, "(1)"
- line 271, "pan.___", state 904, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 913, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 928, "(1)"
- line 283, "pan.___", state 935, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 951, "(1)"
- line 252, "pan.___", state 959, "(1)"
- line 256, "pan.___", state 971, "(1)"
- line 260, "pan.___", state 979, "(1)"
- line 275, "pan.___", state 1004, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1017, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1026, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1042, "(1)"
- line 252, "pan.___", state 1050, "(1)"
- line 256, "pan.___", state 1062, "(1)"
- line 260, "pan.___", state 1070, "(1)"
- line 275, "pan.___", state 1095, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1108, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1117, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1133, "(1)"
- line 252, "pan.___", state 1141, "(1)"
- line 256, "pan.___", state 1153, "(1)"
- line 260, "pan.___", state 1161, "(1)"
- line 275, "pan.___", state 1186, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1199, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1208, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1224, "(1)"
- line 252, "pan.___", state 1232, "(1)"
- line 256, "pan.___", state 1244, "(1)"
- line 260, "pan.___", state 1252, "(1)"
- line 1236, "pan.___", state 1267, "-end-"
- (71 of 1267 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1299, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 5.57e+03 seconds
-pan: rate 1203.9777 states/second
-pan: avg transition delay 1.2537e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 5985 States= 1e+06 Transitions= 3.71e+08 Memory= 550.432 t= 439 R= 2e+03
-Depth= 8926 States= 2e+06 Transitions= 9.51e+08 Memory= 634.416 t= 1.15e+03 R= 2e+03
-Depth= 8926 States= 3e+06 Transitions= 1.54e+09 Memory= 718.303 t= 1.89e+03 R= 2e+03
-pan: resizing hashtable to -w22.. done
-Depth= 8926 States= 4e+06 Transitions= 2.08e+09 Memory= 833.311 t= 2.56e+03 R= 2e+03
-Depth= 8926 States= 5e+06 Transitions= 2.46e+09 Memory= 917.295 t= 3.01e+03 R= 2e+03
-Depth= 8926 States= 6e+06 Transitions= 2.91e+09 Memory= 1001.279 t= 3.56e+03 R= 2e+03
-pan: claim violated! (at depth 1267)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 8926, errors: 1
- 6822337 states, stored
-3.2012922e+09 states, matched
-3.2081145e+09 transitions (= stored+matched)
-1.7190132e+10 atomic steps
-hash conflicts: 2.341747e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 754.729 equivalent memory usage for states (stored*(State-vector + overhead))
- 580.944 actual memory usage for states (compression: 76.97%)
- state-vector as stored = 61 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 1070.322 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 21, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 53, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 67, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 86, "(1)"
- line 438, "pan.___", state 116, "(1)"
- line 442, "pan.___", state 129, "(1)"
- line 603, "pan.___", state 150, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 157, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 189, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 203, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 222, "(1)"
- line 438, "pan.___", state 252, "(1)"
- line 442, "pan.___", state 265, "(1)"
- line 411, "pan.___", state 286, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 318, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 332, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 351, "(1)"
- line 438, "pan.___", state 381, "(1)"
- line 442, "pan.___", state 394, "(1)"
- line 411, "pan.___", state 417, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 419, "(1)"
- line 411, "pan.___", state 420, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 420, "else"
- line 411, "pan.___", state 423, "(1)"
- line 415, "pan.___", state 431, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 433, "(1)"
- line 415, "pan.___", state 434, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 434, "else"
- line 415, "pan.___", state 437, "(1)"
- line 415, "pan.___", state 438, "(1)"
- line 415, "pan.___", state 438, "(1)"
- line 413, "pan.___", state 443, "((i<1))"
- line 413, "pan.___", state 443, "((i>=1))"
- line 420, "pan.___", state 449, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 451, "(1)"
- line 420, "pan.___", state 452, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 452, "else"
- line 420, "pan.___", state 455, "(1)"
- line 420, "pan.___", state 456, "(1)"
- line 420, "pan.___", state 456, "(1)"
- line 424, "pan.___", state 463, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 465, "(1)"
- line 424, "pan.___", state 466, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 466, "else"
- line 424, "pan.___", state 469, "(1)"
- line 424, "pan.___", state 470, "(1)"
- line 424, "pan.___", state 470, "(1)"
- line 422, "pan.___", state 475, "((i<2))"
- line 422, "pan.___", state 475, "((i>=2))"
- line 429, "pan.___", state 482, "(1)"
- line 429, "pan.___", state 483, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 483, "else"
- line 429, "pan.___", state 486, "(1)"
- line 429, "pan.___", state 487, "(1)"
- line 429, "pan.___", state 487, "(1)"
- line 433, "pan.___", state 495, "(1)"
- line 433, "pan.___", state 496, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 496, "else"
- line 433, "pan.___", state 499, "(1)"
- line 433, "pan.___", state 500, "(1)"
- line 433, "pan.___", state 500, "(1)"
- line 431, "pan.___", state 505, "((i<1))"
- line 431, "pan.___", state 505, "((i>=1))"
- line 438, "pan.___", state 512, "(1)"
- line 438, "pan.___", state 513, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 513, "else"
- line 438, "pan.___", state 516, "(1)"
- line 438, "pan.___", state 517, "(1)"
- line 438, "pan.___", state 517, "(1)"
- line 442, "pan.___", state 525, "(1)"
- line 442, "pan.___", state 526, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 526, "else"
- line 442, "pan.___", state 529, "(1)"
- line 442, "pan.___", state 530, "(1)"
- line 442, "pan.___", state 530, "(1)"
- line 440, "pan.___", state 535, "((i<2))"
- line 440, "pan.___", state 535, "((i>=2))"
- line 450, "pan.___", state 539, "(1)"
- line 450, "pan.___", state 539, "(1)"
- line 603, "pan.___", state 542, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 603, "pan.___", state 543, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 603, "pan.___", state 544, "(1)"
- line 272, "pan.___", state 548, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 550, "(1)"
- line 276, "pan.___", state 557, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 559, "(1)"
- line 276, "pan.___", state 560, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 560, "else"
- line 274, "pan.___", state 565, "((i<1))"
- line 274, "pan.___", state 565, "((i>=1))"
- line 280, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 572, "(1)"
- line 280, "pan.___", state 573, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 573, "else"
- line 284, "pan.___", state 579, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 581, "(1)"
- line 284, "pan.___", state 582, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 582, "else"
- line 282, "pan.___", state 587, "((i<2))"
- line 282, "pan.___", state 587, "((i>=2))"
- line 249, "pan.___", state 595, "(1)"
- line 253, "pan.___", state 603, "(1)"
- line 253, "pan.___", state 604, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 604, "else"
- line 251, "pan.___", state 609, "((i<1))"
- line 251, "pan.___", state 609, "((i>=1))"
- line 257, "pan.___", state 615, "(1)"
- line 257, "pan.___", state 616, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 616, "else"
- line 261, "pan.___", state 623, "(1)"
- line 261, "pan.___", state 624, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 624, "else"
- line 266, "pan.___", state 633, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 633, "else"
- line 299, "pan.___", state 635, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 635, "else"
- line 411, "pan.___", state 641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 673, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 687, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 706, "(1)"
- line 438, "pan.___", state 736, "(1)"
- line 442, "pan.___", state 749, "(1)"
- line 411, "pan.___", state 777, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 809, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 823, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 842, "(1)"
- line 438, "pan.___", state 872, "(1)"
- line 442, "pan.___", state 885, "(1)"
- line 411, "pan.___", state 906, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 908, "(1)"
- line 411, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 909, "else"
- line 411, "pan.___", state 912, "(1)"
- line 415, "pan.___", state 920, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 922, "(1)"
- line 415, "pan.___", state 923, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 923, "else"
- line 415, "pan.___", state 926, "(1)"
- line 415, "pan.___", state 927, "(1)"
- line 415, "pan.___", state 927, "(1)"
- line 413, "pan.___", state 932, "((i<1))"
- line 413, "pan.___", state 932, "((i>=1))"
- line 420, "pan.___", state 938, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 940, "(1)"
- line 420, "pan.___", state 941, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 941, "else"
- line 420, "pan.___", state 944, "(1)"
- line 420, "pan.___", state 945, "(1)"
- line 420, "pan.___", state 945, "(1)"
- line 424, "pan.___", state 952, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 954, "(1)"
- line 424, "pan.___", state 955, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 955, "else"
- line 424, "pan.___", state 958, "(1)"
- line 424, "pan.___", state 959, "(1)"
- line 424, "pan.___", state 959, "(1)"
- line 422, "pan.___", state 964, "((i<2))"
- line 422, "pan.___", state 964, "((i>=2))"
- line 429, "pan.___", state 971, "(1)"
- line 429, "pan.___", state 972, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 972, "else"
- line 429, "pan.___", state 975, "(1)"
- line 429, "pan.___", state 976, "(1)"
- line 429, "pan.___", state 976, "(1)"
- line 433, "pan.___", state 984, "(1)"
- line 433, "pan.___", state 985, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 985, "else"
- line 433, "pan.___", state 988, "(1)"
- line 433, "pan.___", state 989, "(1)"
- line 433, "pan.___", state 989, "(1)"
- line 431, "pan.___", state 994, "((i<1))"
- line 431, "pan.___", state 994, "((i>=1))"
- line 438, "pan.___", state 1001, "(1)"
- line 438, "pan.___", state 1002, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 1002, "else"
- line 438, "pan.___", state 1005, "(1)"
- line 438, "pan.___", state 1006, "(1)"
- line 438, "pan.___", state 1006, "(1)"
- line 442, "pan.___", state 1014, "(1)"
- line 442, "pan.___", state 1015, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 1015, "else"
- line 442, "pan.___", state 1018, "(1)"
- line 442, "pan.___", state 1019, "(1)"
- line 442, "pan.___", state 1019, "(1)"
- line 440, "pan.___", state 1024, "((i<2))"
- line 440, "pan.___", state 1024, "((i>=2))"
- line 450, "pan.___", state 1028, "(1)"
- line 450, "pan.___", state 1028, "(1)"
- line 611, "pan.___", state 1032, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 1037, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1069, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1083, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1102, "(1)"
- line 438, "pan.___", state 1132, "(1)"
- line 442, "pan.___", state 1145, "(1)"
- line 411, "pan.___", state 1169, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1201, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1215, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1234, "(1)"
- line 438, "pan.___", state 1264, "(1)"
- line 442, "pan.___", state 1277, "(1)"
- line 411, "pan.___", state 1302, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1334, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1348, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1367, "(1)"
- line 438, "pan.___", state 1397, "(1)"
- line 442, "pan.___", state 1410, "(1)"
- line 411, "pan.___", state 1431, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1463, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1477, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1496, "(1)"
- line 438, "pan.___", state 1526, "(1)"
- line 442, "pan.___", state 1539, "(1)"
- line 272, "pan.___", state 1562, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1564, "(1)"
- line 276, "pan.___", state 1571, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1573, "(1)"
- line 276, "pan.___", state 1574, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1574, "else"
- line 274, "pan.___", state 1579, "((i<1))"
- line 274, "pan.___", state 1579, "((i>=1))"
- line 280, "pan.___", state 1584, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1586, "(1)"
- line 280, "pan.___", state 1587, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1587, "else"
- line 284, "pan.___", state 1593, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1595, "(1)"
- line 284, "pan.___", state 1596, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1596, "else"
- line 282, "pan.___", state 1601, "((i<2))"
- line 282, "pan.___", state 1601, "((i>=2))"
- line 249, "pan.___", state 1609, "(1)"
- line 253, "pan.___", state 1617, "(1)"
- line 253, "pan.___", state 1618, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1618, "else"
- line 251, "pan.___", state 1623, "((i<1))"
- line 251, "pan.___", state 1623, "((i>=1))"
- line 257, "pan.___", state 1629, "(1)"
- line 257, "pan.___", state 1630, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1630, "else"
- line 261, "pan.___", state 1637, "(1)"
- line 261, "pan.___", state 1638, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1638, "else"
- line 266, "pan.___", state 1647, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1647, "else"
- line 299, "pan.___", state 1649, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1649, "else"
- line 411, "pan.___", state 1655, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1687, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1701, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1720, "(1)"
- line 438, "pan.___", state 1750, "(1)"
- line 442, "pan.___", state 1763, "(1)"
- line 411, "pan.___", state 1784, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1816, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1830, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1849, "(1)"
- line 438, "pan.___", state 1879, "(1)"
- line 442, "pan.___", state 1892, "(1)"
- line 411, "pan.___", state 1916, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1948, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1962, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1981, "(1)"
- line 438, "pan.___", state 2011, "(1)"
- line 442, "pan.___", state 2024, "(1)"
- line 650, "pan.___", state 2045, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 2052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2084, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2098, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2117, "(1)"
- line 438, "pan.___", state 2147, "(1)"
- line 442, "pan.___", state 2160, "(1)"
- line 411, "pan.___", state 2181, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2213, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2227, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2246, "(1)"
- line 438, "pan.___", state 2276, "(1)"
- line 442, "pan.___", state 2289, "(1)"
- line 411, "pan.___", state 2312, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2314, "(1)"
- line 411, "pan.___", state 2315, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2315, "else"
- line 411, "pan.___", state 2318, "(1)"
- line 415, "pan.___", state 2326, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2328, "(1)"
- line 415, "pan.___", state 2329, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2329, "else"
- line 415, "pan.___", state 2332, "(1)"
- line 415, "pan.___", state 2333, "(1)"
- line 415, "pan.___", state 2333, "(1)"
- line 413, "pan.___", state 2338, "((i<1))"
- line 413, "pan.___", state 2338, "((i>=1))"
- line 420, "pan.___", state 2344, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2346, "(1)"
- line 420, "pan.___", state 2347, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2347, "else"
- line 420, "pan.___", state 2350, "(1)"
- line 420, "pan.___", state 2351, "(1)"
- line 420, "pan.___", state 2351, "(1)"
- line 424, "pan.___", state 2358, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2360, "(1)"
- line 424, "pan.___", state 2361, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2361, "else"
- line 424, "pan.___", state 2364, "(1)"
- line 424, "pan.___", state 2365, "(1)"
- line 424, "pan.___", state 2365, "(1)"
- line 422, "pan.___", state 2370, "((i<2))"
- line 422, "pan.___", state 2370, "((i>=2))"
- line 429, "pan.___", state 2377, "(1)"
- line 429, "pan.___", state 2378, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 2378, "else"
- line 429, "pan.___", state 2381, "(1)"
- line 429, "pan.___", state 2382, "(1)"
- line 429, "pan.___", state 2382, "(1)"
- line 433, "pan.___", state 2390, "(1)"
- line 433, "pan.___", state 2391, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 2391, "else"
- line 433, "pan.___", state 2394, "(1)"
- line 433, "pan.___", state 2395, "(1)"
- line 433, "pan.___", state 2395, "(1)"
- line 431, "pan.___", state 2400, "((i<1))"
- line 431, "pan.___", state 2400, "((i>=1))"
- line 438, "pan.___", state 2407, "(1)"
- line 438, "pan.___", state 2408, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 2408, "else"
- line 438, "pan.___", state 2411, "(1)"
- line 438, "pan.___", state 2412, "(1)"
- line 438, "pan.___", state 2412, "(1)"
- line 442, "pan.___", state 2420, "(1)"
- line 442, "pan.___", state 2421, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 2421, "else"
- line 442, "pan.___", state 2424, "(1)"
- line 442, "pan.___", state 2425, "(1)"
- line 442, "pan.___", state 2425, "(1)"
- line 440, "pan.___", state 2430, "((i<2))"
- line 440, "pan.___", state 2430, "((i>=2))"
- line 450, "pan.___", state 2434, "(1)"
- line 450, "pan.___", state 2434, "(1)"
- line 650, "pan.___", state 2437, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 650, "pan.___", state 2438, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 650, "pan.___", state 2439, "(1)"
- line 272, "pan.___", state 2443, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 2445, "(1)"
- line 276, "pan.___", state 2452, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2454, "(1)"
- line 276, "pan.___", state 2455, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 2455, "else"
- line 274, "pan.___", state 2460, "((i<1))"
- line 274, "pan.___", state 2460, "((i>=1))"
- line 280, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2467, "(1)"
- line 280, "pan.___", state 2468, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 2468, "else"
- line 284, "pan.___", state 2474, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2476, "(1)"
- line 284, "pan.___", state 2477, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 2477, "else"
- line 282, "pan.___", state 2482, "((i<2))"
- line 282, "pan.___", state 2482, "((i>=2))"
- line 249, "pan.___", state 2490, "(1)"
- line 253, "pan.___", state 2498, "(1)"
- line 253, "pan.___", state 2499, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2499, "else"
- line 251, "pan.___", state 2504, "((i<1))"
- line 251, "pan.___", state 2504, "((i>=1))"
- line 257, "pan.___", state 2510, "(1)"
- line 257, "pan.___", state 2511, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2511, "else"
- line 261, "pan.___", state 2518, "(1)"
- line 261, "pan.___", state 2519, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2519, "else"
- line 266, "pan.___", state 2528, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2528, "else"
- line 299, "pan.___", state 2530, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 2530, "else"
- line 411, "pan.___", state 2536, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2568, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2582, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2601, "(1)"
- line 438, "pan.___", state 2631, "(1)"
- line 442, "pan.___", state 2644, "(1)"
- line 272, "pan.___", state 2668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 2670, "(1)"
- line 276, "pan.___", state 2677, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2679, "(1)"
- line 276, "pan.___", state 2680, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 2680, "else"
- line 274, "pan.___", state 2685, "((i<1))"
- line 274, "pan.___", state 2685, "((i>=1))"
- line 280, "pan.___", state 2690, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2692, "(1)"
- line 280, "pan.___", state 2693, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 2693, "else"
- line 284, "pan.___", state 2699, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2701, "(1)"
- line 284, "pan.___", state 2702, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 2702, "else"
- line 282, "pan.___", state 2707, "((i<2))"
- line 282, "pan.___", state 2707, "((i>=2))"
- line 249, "pan.___", state 2715, "(1)"
- line 253, "pan.___", state 2723, "(1)"
- line 253, "pan.___", state 2724, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2724, "else"
- line 251, "pan.___", state 2729, "((i<1))"
- line 251, "pan.___", state 2729, "((i>=1))"
- line 257, "pan.___", state 2735, "(1)"
- line 257, "pan.___", state 2736, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2736, "else"
- line 261, "pan.___", state 2743, "(1)"
- line 261, "pan.___", state 2744, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2744, "else"
- line 266, "pan.___", state 2753, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2753, "else"
- line 299, "pan.___", state 2755, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 2755, "else"
- line 411, "pan.___", state 2761, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2793, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2807, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2826, "(1)"
- line 438, "pan.___", state 2856, "(1)"
- line 442, "pan.___", state 2869, "(1)"
- line 411, "pan.___", state 2890, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2922, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2936, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2955, "(1)"
- line 438, "pan.___", state 2985, "(1)"
- line 442, "pan.___", state 2998, "(1)"
- line 249, "pan.___", state 3031, "(1)"
- line 257, "pan.___", state 3051, "(1)"
- line 261, "pan.___", state 3059, "(1)"
- line 249, "pan.___", state 3074, "(1)"
- line 257, "pan.___", state 3094, "(1)"
- line 261, "pan.___", state 3102, "(1)"
- line 898, "pan.___", state 3119, "-end-"
- (330 of 3119 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 20, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 26, "(1)"
- line 415, "pan.___", state 34, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 40, "(1)"
- line 415, "pan.___", state 41, "(1)"
- line 415, "pan.___", state 41, "(1)"
- line 413, "pan.___", state 46, "((i<1))"
- line 413, "pan.___", state 46, "((i>=1))"
- line 420, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 58, "(1)"
- line 420, "pan.___", state 59, "(1)"
- line 420, "pan.___", state 59, "(1)"
- line 424, "pan.___", state 72, "(1)"
- line 424, "pan.___", state 73, "(1)"
- line 424, "pan.___", state 73, "(1)"
- line 422, "pan.___", state 78, "((i<2))"
- line 422, "pan.___", state 78, "((i>=2))"
- line 429, "pan.___", state 85, "(1)"
- line 429, "pan.___", state 86, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 86, "else"
- line 429, "pan.___", state 89, "(1)"
- line 429, "pan.___", state 90, "(1)"
- line 429, "pan.___", state 90, "(1)"
- line 433, "pan.___", state 98, "(1)"
- line 433, "pan.___", state 99, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 99, "else"
- line 433, "pan.___", state 102, "(1)"
- line 433, "pan.___", state 103, "(1)"
- line 433, "pan.___", state 103, "(1)"
- line 431, "pan.___", state 108, "((i<1))"
- line 431, "pan.___", state 108, "((i>=1))"
- line 438, "pan.___", state 115, "(1)"
- line 438, "pan.___", state 116, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 116, "else"
- line 438, "pan.___", state 119, "(1)"
- line 438, "pan.___", state 120, "(1)"
- line 438, "pan.___", state 120, "(1)"
- line 442, "pan.___", state 128, "(1)"
- line 442, "pan.___", state 129, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 129, "else"
- line 442, "pan.___", state 132, "(1)"
- line 442, "pan.___", state 133, "(1)"
- line 442, "pan.___", state 133, "(1)"
- line 440, "pan.___", state 138, "((i<2))"
- line 440, "pan.___", state 138, "((i>=2))"
- line 450, "pan.___", state 142, "(1)"
- line 450, "pan.___", state 142, "(1)"
- line 272, "pan.___", state 151, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 160, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 274, "pan.___", state 168, "((i<1))"
- line 274, "pan.___", state 168, "((i>=1))"
- line 280, "pan.___", state 173, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 1021, "pan.___", state 201, "old_data = cached_rcu_ptr.val[_pid]"
- line 1032, "pan.___", state 205, "_proc_urcu_writer = (_proc_urcu_writer|(1<<4))"
- line 411, "pan.___", state 213, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 219, "(1)"
- line 415, "pan.___", state 227, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 233, "(1)"
- line 415, "pan.___", state 234, "(1)"
- line 415, "pan.___", state 234, "(1)"
- line 413, "pan.___", state 239, "((i<1))"
- line 413, "pan.___", state 239, "((i>=1))"
- line 420, "pan.___", state 247, "(1)"
- line 420, "pan.___", state 248, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 248, "else"
- line 420, "pan.___", state 251, "(1)"
- line 420, "pan.___", state 252, "(1)"
- line 420, "pan.___", state 252, "(1)"
- line 424, "pan.___", state 259, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 265, "(1)"
- line 424, "pan.___", state 266, "(1)"
- line 424, "pan.___", state 266, "(1)"
- line 422, "pan.___", state 271, "((i<2))"
- line 422, "pan.___", state 271, "((i>=2))"
- line 429, "pan.___", state 278, "(1)"
- line 429, "pan.___", state 279, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 279, "else"
- line 429, "pan.___", state 282, "(1)"
- line 429, "pan.___", state 283, "(1)"
- line 429, "pan.___", state 283, "(1)"
- line 433, "pan.___", state 291, "(1)"
- line 433, "pan.___", state 292, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 292, "else"
- line 433, "pan.___", state 295, "(1)"
- line 433, "pan.___", state 296, "(1)"
- line 433, "pan.___", state 296, "(1)"
- line 431, "pan.___", state 301, "((i<1))"
- line 431, "pan.___", state 301, "((i>=1))"
- line 438, "pan.___", state 308, "(1)"
- line 438, "pan.___", state 309, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 309, "else"
- line 438, "pan.___", state 312, "(1)"
- line 438, "pan.___", state 313, "(1)"
- line 438, "pan.___", state 313, "(1)"
- line 442, "pan.___", state 321, "(1)"
- line 442, "pan.___", state 322, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 322, "else"
- line 442, "pan.___", state 325, "(1)"
- line 442, "pan.___", state 326, "(1)"
- line 442, "pan.___", state 326, "(1)"
- line 440, "pan.___", state 331, "((i<2))"
- line 440, "pan.___", state 331, "((i>=2))"
- line 450, "pan.___", state 335, "(1)"
- line 450, "pan.___", state 335, "(1)"
- line 411, "pan.___", state 346, "(1)"
- line 411, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 347, "else"
- line 411, "pan.___", state 350, "(1)"
- line 415, "pan.___", state 358, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 364, "(1)"
- line 415, "pan.___", state 365, "(1)"
- line 415, "pan.___", state 365, "(1)"
- line 413, "pan.___", state 370, "((i<1))"
- line 413, "pan.___", state 370, "((i>=1))"
- line 420, "pan.___", state 376, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 382, "(1)"
- line 420, "pan.___", state 383, "(1)"
- line 420, "pan.___", state 383, "(1)"
- line 424, "pan.___", state 390, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 396, "(1)"
- line 424, "pan.___", state 397, "(1)"
- line 424, "pan.___", state 397, "(1)"
- line 422, "pan.___", state 402, "((i<2))"
- line 422, "pan.___", state 402, "((i>=2))"
- line 429, "pan.___", state 409, "(1)"
- line 429, "pan.___", state 410, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 410, "else"
- line 429, "pan.___", state 413, "(1)"
- line 429, "pan.___", state 414, "(1)"
- line 429, "pan.___", state 414, "(1)"
- line 433, "pan.___", state 422, "(1)"
- line 433, "pan.___", state 423, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 423, "else"
- line 433, "pan.___", state 426, "(1)"
- line 433, "pan.___", state 427, "(1)"
- line 433, "pan.___", state 427, "(1)"
- line 431, "pan.___", state 432, "((i<1))"
- line 431, "pan.___", state 432, "((i>=1))"
- line 438, "pan.___", state 439, "(1)"
- line 438, "pan.___", state 440, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 440, "else"
- line 438, "pan.___", state 443, "(1)"
- line 438, "pan.___", state 444, "(1)"
- line 438, "pan.___", state 444, "(1)"
- line 442, "pan.___", state 452, "(1)"
- line 442, "pan.___", state 453, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 453, "else"
- line 442, "pan.___", state 456, "(1)"
- line 442, "pan.___", state 457, "(1)"
- line 442, "pan.___", state 457, "(1)"
- line 440, "pan.___", state 462, "((i<2))"
- line 440, "pan.___", state 462, "((i>=2))"
- line 450, "pan.___", state 466, "(1)"
- line 450, "pan.___", state 466, "(1)"
- line 1086, "pan.___", state 477, "_proc_urcu_writer = (_proc_urcu_writer&~((1<<9)))"
- line 1091, "pan.___", state 478, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<8)|(1<<7))))"
- line 411, "pan.___", state 483, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 489, "(1)"
- line 415, "pan.___", state 497, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 503, "(1)"
- line 415, "pan.___", state 504, "(1)"
- line 415, "pan.___", state 504, "(1)"
- line 413, "pan.___", state 509, "((i<1))"
- line 413, "pan.___", state 509, "((i>=1))"
- line 420, "pan.___", state 515, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 521, "(1)"
- line 420, "pan.___", state 522, "(1)"
- line 420, "pan.___", state 522, "(1)"
- line 424, "pan.___", state 529, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 535, "(1)"
- line 424, "pan.___", state 536, "(1)"
- line 424, "pan.___", state 536, "(1)"
- line 422, "pan.___", state 541, "((i<2))"
- line 422, "pan.___", state 541, "((i>=2))"
- line 429, "pan.___", state 548, "(1)"
- line 429, "pan.___", state 549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 549, "else"
- line 429, "pan.___", state 552, "(1)"
- line 429, "pan.___", state 553, "(1)"
- line 429, "pan.___", state 553, "(1)"
- line 433, "pan.___", state 561, "(1)"
- line 433, "pan.___", state 562, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 562, "else"
- line 433, "pan.___", state 565, "(1)"
- line 433, "pan.___", state 566, "(1)"
- line 433, "pan.___", state 566, "(1)"
- line 431, "pan.___", state 571, "((i<1))"
- line 431, "pan.___", state 571, "((i>=1))"
- line 438, "pan.___", state 578, "(1)"
- line 438, "pan.___", state 579, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 579, "else"
- line 438, "pan.___", state 582, "(1)"
- line 438, "pan.___", state 583, "(1)"
- line 438, "pan.___", state 583, "(1)"
- line 442, "pan.___", state 591, "(1)"
- line 442, "pan.___", state 592, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 592, "else"
- line 442, "pan.___", state 595, "(1)"
- line 442, "pan.___", state 596, "(1)"
- line 442, "pan.___", state 596, "(1)"
- line 450, "pan.___", state 605, "(1)"
- line 450, "pan.___", state 605, "(1)"
- line 411, "pan.___", state 612, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 626, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 644, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 677, "(1)"
- line 433, "pan.___", state 690, "(1)"
- line 438, "pan.___", state 707, "(1)"
- line 442, "pan.___", state 720, "(1)"
- line 415, "pan.___", state 757, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 775, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 789, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 821, "(1)"
- line 438, "pan.___", state 838, "(1)"
- line 442, "pan.___", state 851, "(1)"
- line 1168, "pan.___", state 878, "_proc_urcu_writer = (_proc_urcu_writer|(1<<13))"
- line 272, "pan.___", state 906, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 908, "(1)"
- line 276, "pan.___", state 915, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 917, "(1)"
- line 276, "pan.___", state 918, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 918, "else"
- line 274, "pan.___", state 923, "((i<1))"
- line 274, "pan.___", state 923, "((i>=1))"
- line 280, "pan.___", state 928, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 930, "(1)"
- line 280, "pan.___", state 931, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 931, "else"
- line 284, "pan.___", state 937, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 939, "(1)"
- line 284, "pan.___", state 940, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 940, "else"
- line 282, "pan.___", state 945, "((i<2))"
- line 282, "pan.___", state 945, "((i>=2))"
- line 249, "pan.___", state 953, "(1)"
- line 253, "pan.___", state 961, "(1)"
- line 253, "pan.___", state 962, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 962, "else"
- line 251, "pan.___", state 967, "((i<1))"
- line 251, "pan.___", state 967, "((i>=1))"
- line 257, "pan.___", state 973, "(1)"
- line 257, "pan.___", state 974, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 974, "else"
- line 261, "pan.___", state 981, "(1)"
- line 261, "pan.___", state 982, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 982, "else"
- line 266, "pan.___", state 991, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 991, "else"
- line 299, "pan.___", state 993, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 993, "else"
- line 272, "pan.___", state 997, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 999, "(1)"
- line 276, "pan.___", state 1006, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1008, "(1)"
- line 276, "pan.___", state 1009, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1009, "else"
- line 274, "pan.___", state 1014, "((i<1))"
- line 274, "pan.___", state 1014, "((i>=1))"
- line 280, "pan.___", state 1019, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1021, "(1)"
- line 280, "pan.___", state 1022, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1022, "else"
- line 284, "pan.___", state 1028, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1030, "(1)"
- line 284, "pan.___", state 1031, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1031, "else"
- line 282, "pan.___", state 1036, "((i<2))"
- line 282, "pan.___", state 1036, "((i>=2))"
- line 249, "pan.___", state 1044, "(1)"
- line 253, "pan.___", state 1052, "(1)"
- line 253, "pan.___", state 1053, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1053, "else"
- line 251, "pan.___", state 1058, "((i<1))"
- line 251, "pan.___", state 1058, "((i>=1))"
- line 257, "pan.___", state 1064, "(1)"
- line 257, "pan.___", state 1065, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1065, "else"
- line 261, "pan.___", state 1072, "(1)"
- line 261, "pan.___", state 1073, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1073, "else"
- line 266, "pan.___", state 1082, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1082, "else"
- line 299, "pan.___", state 1084, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1084, "else"
- line 276, "pan.___", state 1097, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1110, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1119, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1135, "(1)"
- line 253, "pan.___", state 1143, "(1)"
- line 257, "pan.___", state 1155, "(1)"
- line 261, "pan.___", state 1163, "(1)"
- line 272, "pan.___", state 1179, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1181, "(1)"
- line 276, "pan.___", state 1188, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1190, "(1)"
- line 276, "pan.___", state 1191, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1191, "else"
- line 274, "pan.___", state 1196, "((i<1))"
- line 274, "pan.___", state 1196, "((i>=1))"
- line 280, "pan.___", state 1201, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1203, "(1)"
- line 280, "pan.___", state 1204, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1204, "else"
- line 284, "pan.___", state 1210, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1212, "(1)"
- line 284, "pan.___", state 1213, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1213, "else"
- line 282, "pan.___", state 1218, "((i<2))"
- line 282, "pan.___", state 1218, "((i>=2))"
- line 249, "pan.___", state 1226, "(1)"
- line 253, "pan.___", state 1234, "(1)"
- line 253, "pan.___", state 1235, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1235, "else"
- line 251, "pan.___", state 1240, "((i<1))"
- line 251, "pan.___", state 1240, "((i>=1))"
- line 257, "pan.___", state 1246, "(1)"
- line 257, "pan.___", state 1247, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1247, "else"
- line 261, "pan.___", state 1254, "(1)"
- line 261, "pan.___", state 1255, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1255, "else"
- line 266, "pan.___", state 1264, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1264, "else"
- line 299, "pan.___", state 1266, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1266, "else"
- line 1237, "pan.___", state 1269, "-end-"
- (227 of 1269 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 3.93e+03 seconds
-pan: rate 1735.2351 states/second
-pan: avg transition delay 1.2255e-06 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define NO_MB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4468
-2:3:4388
-3:3:4391
-4:3:4391
-5:3:4394
-6:3:4402
-7:3:4402
-8:3:4405
-9:3:4411
-10:3:4415
-11:3:4415
-12:3:4418
-13:3:4428
-14:3:4436
-15:3:4436
-16:3:4439
-17:3:4445
-18:3:4449
-19:3:4449
-20:3:4452
-21:3:4458
-22:3:4462
-23:3:4463
-24:0:4468
-25:3:4465
-26:0:4468
-27:2:3121
-28:0:4468
-29:2:3127
-30:0:4468
-31:2:3128
-32:0:4468
-33:2:3130
-34:0:4468
-35:2:3131
-36:0:4468
-37:2:3132
-38:0:4468
-39:2:3133
-40:0:4468
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-944:1:76
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-946:1:82
-947:1:93
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-949:1:95
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-951:1:118
-952:1:119
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-959:1:136
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-980:1:166
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-999:1:229
-1000:1:230
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-1005:1:259
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-1008:1:259
-1009:1:260
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-1011:1:272
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-1013:2:4016
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-1017:2:4017
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-1019:1:281
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-1021:1:286
-1022:1:287
-1023:1:295
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-1025:1:300
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-1027:1:309
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-1038:1:333
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-1041:1:347
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-1045:1:371
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-1050:1:390
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-1054:1:401
-1055:1:408
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-1063:1:636
-1064:1:637
-1065:1:641
-1066:1:642
-1067:1:650
-1068:1:651
-1069:1:652
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-1073:1:674
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-1080:1:687
-1081:1:688
-1082:1:696
-1083:1:701
-1084:1:702
-1085:1:713
-1086:1:714
-1087:1:715
-1088:1:726
-1089:1:738
-1090:1:739
-1091:1:743
-1092:1:744
-1093:1:745
-1094:1:743
-1095:1:744
-1096:1:745
-1097:1:756
-1098:0:4468
-1099:2:4016
-1100:0:4468
-1101:1:15
-1102:0:4468
-1103:2:4017
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-1105:1:765
-1106:1:768
-1107:1:769
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-1110:0:4468
-1111:1:15
-1112:0:4468
-1113:2:4017
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-1116:1:773
-1117:1:777
-1118:1:778
-1119:1:786
-1120:1:787
-1121:1:791
-1122:1:792
-1123:1:800
-1124:1:805
-1125:1:809
-1126:1:810
-1127:1:818
-1128:1:819
-1129:1:823
-1130:1:824
-1131:1:818
-1132:1:819
-1133:1:823
-1134:1:824
-1135:1:832
-1136:1:837
-1137:1:838
-1138:1:849
-1139:1:850
-1140:1:851
-1141:1:862
-1142:1:874
-1143:1:875
-1144:1:879
-1145:1:880
-1146:1:881
-1147:1:879
-1148:1:880
-1149:1:881
-1150:1:892
-1151:0:4468
-1152:2:4016
-1153:0:4468
-1154:1:15
-1155:0:4468
-1156:2:4017
-1157:0:4468
-1158:1:1032
-1159:1:1033
-1160:1:1037
-1161:1:1038
-1162:1:1046
-1163:1:1047
-1164:1:1051
-1165:1:1052
-1166:1:1060
-1167:1:1065
-1168:1:1069
-1169:1:1070
-1170:1:1078
-1171:1:1079
-1172:1:1083
-1173:1:1084
-1174:1:1078
-1175:1:1079
-1176:1:1083
-1177:1:1084
-1178:1:1092
-1179:1:1097
-1180:1:1098
-1181:1:1109
-1182:1:1110
-1183:1:1111
-1184:1:1122
-1185:1:1134
-1186:1:1135
-1187:1:1139
-1188:1:1140
-1189:1:1141
-1190:1:1139
-1191:1:1140
-1192:1:1141
-1193:1:1152
-1194:1:1159
-1195:1:1163
-1196:0:4468
-1197:2:4016
-1198:0:4468
-1199:1:15
-1200:0:4468
-1201:2:4017
-1202:0:4468
-1203:1:1164
-1204:1:1165
-1205:1:1169
-1206:1:1170
-1207:1:1178
-1208:1:1179
-1209:1:1180
-1210:1:1192
-1211:1:1197
-1212:1:1201
-1213:1:1202
-1214:1:1210
-1215:1:1211
-1216:1:1215
-1217:1:1216
-1218:1:1210
-1219:1:1211
-1220:1:1215
-1221:1:1216
-1222:1:1224
-1223:1:1229
-1224:1:1230
-1225:1:1241
-1226:1:1242
-1227:1:1243
-1228:1:1254
-1229:1:1266
-1230:1:1267
-1231:1:1271
-1232:1:1272
-1233:1:1273
-1234:1:1271
-1235:1:1272
-1236:1:1273
-1237:1:1284
-1238:0:4468
-1239:2:4016
-1240:0:4468
-1241:1:15
-1242:0:4468
-1243:2:4017
-1244:0:4468
-1245:1:1293
-1246:0:4468
-1247:2:4016
-1248:0:4468
-1249:1:3027
-1250:1:3034
-1251:1:3035
-1252:1:3042
-1253:1:3047
-1254:1:3054
-1255:1:3055
-1256:1:3054
-1257:1:3055
-1258:1:3062
-1259:1:3066
-1260:0:4468
-1261:2:4017
-1262:0:4468
-1263:1:1295
-1264:1:1296
-1265:0:4466
-1266:2:4016
-1267:0:4472
-1268:1:756
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-pan: claim violated! (at depth 2092)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5332, errors: 1
- 615700 states, stored
-3.8337558e+08 states, matched
-3.8399128e+08 transitions (= stored+matched)
-2.147943e+09 atomic steps
-hash conflicts: 90741041 (resolved)
-
-Stats on memory usage (in Megabytes):
- 68.113 equivalent memory usage for states (stored*(State-vector + overhead))
- 52.415 actual memory usage for states (compression: 76.95%)
- state-vector as stored = 61 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 518.108 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 82, "(1)"
- line 438, "pan.___", state 112, "(1)"
- line 442, "pan.___", state 125, "(1)"
- line 597, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 218, "(1)"
- line 438, "pan.___", state 248, "(1)"
- line 442, "pan.___", state 261, "(1)"
- line 411, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 347, "(1)"
- line 438, "pan.___", state 377, "(1)"
- line 442, "pan.___", state 390, "(1)"
- line 411, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 415, "(1)"
- line 411, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 416, "else"
- line 411, "pan.___", state 419, "(1)"
- line 415, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 429, "(1)"
- line 415, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 430, "else"
- line 415, "pan.___", state 433, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 413, "pan.___", state 439, "((i<1))"
- line 413, "pan.___", state 439, "((i>=1))"
- line 420, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 447, "(1)"
- line 420, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 448, "else"
- line 420, "pan.___", state 451, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 424, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 461, "(1)"
- line 424, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 462, "else"
- line 424, "pan.___", state 465, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 422, "pan.___", state 471, "((i<2))"
- line 422, "pan.___", state 471, "((i>=2))"
- line 429, "pan.___", state 478, "(1)"
- line 429, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 479, "else"
- line 429, "pan.___", state 482, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 433, "pan.___", state 491, "(1)"
- line 433, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 492, "else"
- line 433, "pan.___", state 495, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 431, "pan.___", state 501, "((i<1))"
- line 431, "pan.___", state 501, "((i>=1))"
- line 438, "pan.___", state 508, "(1)"
- line 438, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 509, "else"
- line 438, "pan.___", state 512, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 442, "pan.___", state 521, "(1)"
- line 442, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 522, "else"
- line 442, "pan.___", state 525, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 440, "pan.___", state 531, "((i<2))"
- line 440, "pan.___", state 531, "((i>=2))"
- line 450, "pan.___", state 535, "(1)"
- line 450, "pan.___", state 535, "(1)"
- line 597, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 540, "(1)"
- line 272, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 555, "(1)"
- line 280, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 591, "(1)"
- line 253, "pan.___", state 599, "(1)"
- line 257, "pan.___", state 611, "(1)"
- line 261, "pan.___", state 619, "(1)"
- line 411, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 702, "(1)"
- line 433, "pan.___", state 715, "(1)"
- line 438, "pan.___", state 732, "(1)"
- line 442, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 838, "(1)"
- line 438, "pan.___", state 868, "(1)"
- line 442, "pan.___", state 881, "(1)"
- line 411, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 904, "(1)"
- line 411, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 905, "else"
- line 411, "pan.___", state 908, "(1)"
- line 415, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 918, "(1)"
- line 415, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 919, "else"
- line 415, "pan.___", state 922, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 413, "pan.___", state 928, "((i<1))"
- line 413, "pan.___", state 928, "((i>=1))"
- line 420, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 936, "(1)"
- line 420, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 937, "else"
- line 420, "pan.___", state 940, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 424, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 950, "(1)"
- line 424, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 951, "else"
- line 424, "pan.___", state 954, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 422, "pan.___", state 960, "((i<2))"
- line 422, "pan.___", state 960, "((i>=2))"
- line 429, "pan.___", state 967, "(1)"
- line 429, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 968, "else"
- line 429, "pan.___", state 971, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 433, "pan.___", state 980, "(1)"
- line 433, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 981, "else"
- line 433, "pan.___", state 984, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 431, "pan.___", state 990, "((i<1))"
- line 431, "pan.___", state 990, "((i>=1))"
- line 438, "pan.___", state 997, "(1)"
- line 438, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 998, "else"
- line 438, "pan.___", state 1001, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 442, "pan.___", state 1010, "(1)"
- line 442, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 1011, "else"
- line 442, "pan.___", state 1014, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 440, "pan.___", state 1020, "((i<2))"
- line 440, "pan.___", state 1020, "((i>=2))"
- line 450, "pan.___", state 1024, "(1)"
- line 450, "pan.___", state 1024, "(1)"
- line 605, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1098, "(1)"
- line 433, "pan.___", state 1111, "(1)"
- line 438, "pan.___", state 1128, "(1)"
- line 442, "pan.___", state 1141, "(1)"
- line 411, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1230, "(1)"
- line 438, "pan.___", state 1260, "(1)"
- line 442, "pan.___", state 1273, "(1)"
- line 411, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1363, "(1)"
- line 438, "pan.___", state 1393, "(1)"
- line 442, "pan.___", state 1406, "(1)"
- line 411, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1492, "(1)"
- line 438, "pan.___", state 1522, "(1)"
- line 442, "pan.___", state 1535, "(1)"
- line 272, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1605, "(1)"
- line 253, "pan.___", state 1613, "(1)"
- line 257, "pan.___", state 1625, "(1)"
- line 261, "pan.___", state 1633, "(1)"
- line 411, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1716, "(1)"
- line 433, "pan.___", state 1729, "(1)"
- line 438, "pan.___", state 1746, "(1)"
- line 442, "pan.___", state 1759, "(1)"
- line 411, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1845, "(1)"
- line 433, "pan.___", state 1858, "(1)"
- line 438, "pan.___", state 1875, "(1)"
- line 442, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1977, "(1)"
- line 438, "pan.___", state 2007, "(1)"
- line 442, "pan.___", state 2020, "(1)"
- line 644, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2113, "(1)"
- line 438, "pan.___", state 2143, "(1)"
- line 442, "pan.___", state 2156, "(1)"
- line 411, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2242, "(1)"
- line 438, "pan.___", state 2272, "(1)"
- line 442, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2310, "(1)"
- line 411, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2311, "else"
- line 411, "pan.___", state 2314, "(1)"
- line 415, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2324, "(1)"
- line 415, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2325, "else"
- line 415, "pan.___", state 2328, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 413, "pan.___", state 2334, "((i<1))"
- line 413, "pan.___", state 2334, "((i>=1))"
- line 420, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2342, "(1)"
- line 420, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2343, "else"
- line 420, "pan.___", state 2346, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 424, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2356, "(1)"
- line 424, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2357, "else"
- line 424, "pan.___", state 2360, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 422, "pan.___", state 2366, "((i<2))"
- line 422, "pan.___", state 2366, "((i>=2))"
- line 429, "pan.___", state 2373, "(1)"
- line 429, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 2374, "else"
- line 429, "pan.___", state 2377, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 433, "pan.___", state 2386, "(1)"
- line 433, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 2387, "else"
- line 433, "pan.___", state 2390, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 431, "pan.___", state 2396, "((i<1))"
- line 431, "pan.___", state 2396, "((i>=1))"
- line 438, "pan.___", state 2403, "(1)"
- line 438, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 2404, "else"
- line 438, "pan.___", state 2407, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 442, "pan.___", state 2416, "(1)"
- line 442, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 2417, "else"
- line 442, "pan.___", state 2420, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 440, "pan.___", state 2426, "((i<2))"
- line 440, "pan.___", state 2426, "((i>=2))"
- line 450, "pan.___", state 2430, "(1)"
- line 450, "pan.___", state 2430, "(1)"
- line 644, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2435, "(1)"
- line 272, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2486, "(1)"
- line 253, "pan.___", state 2494, "(1)"
- line 257, "pan.___", state 2506, "(1)"
- line 261, "pan.___", state 2514, "(1)"
- line 411, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2597, "(1)"
- line 433, "pan.___", state 2610, "(1)"
- line 438, "pan.___", state 2627, "(1)"
- line 442, "pan.___", state 2640, "(1)"
- line 272, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2711, "(1)"
- line 253, "pan.___", state 2719, "(1)"
- line 257, "pan.___", state 2731, "(1)"
- line 261, "pan.___", state 2739, "(1)"
- line 411, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2822, "(1)"
- line 433, "pan.___", state 2835, "(1)"
- line 438, "pan.___", state 2852, "(1)"
- line 442, "pan.___", state 2865, "(1)"
- line 411, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2951, "(1)"
- line 433, "pan.___", state 2964, "(1)"
- line 438, "pan.___", state 2981, "(1)"
- line 442, "pan.___", state 2994, "(1)"
- line 411, "pan.___", state 3027, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 3059, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 3073, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 3092, "(1)"
- line 438, "pan.___", state 3122, "(1)"
- line 442, "pan.___", state 3135, "(1)"
- line 411, "pan.___", state 3154, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 3168, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 3186, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 3200, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 3219, "(1)"
- line 433, "pan.___", state 3232, "(1)"
- line 438, "pan.___", state 3249, "(1)"
- line 442, "pan.___", state 3262, "(1)"
- line 898, "pan.___", state 3283, "-end-"
- (290 of 3283 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 24, "(1)"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 38, "(1)"
- line 415, "pan.___", state 39, "(1)"
- line 415, "pan.___", state 39, "(1)"
- line 413, "pan.___", state 44, "((i<1))"
- line 413, "pan.___", state 44, "((i>=1))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 56, "(1)"
- line 420, "pan.___", state 57, "(1)"
- line 420, "pan.___", state 57, "(1)"
- line 424, "pan.___", state 70, "(1)"
- line 424, "pan.___", state 71, "(1)"
- line 424, "pan.___", state 71, "(1)"
- line 422, "pan.___", state 76, "((i<2))"
- line 422, "pan.___", state 76, "((i>=2))"
- line 429, "pan.___", state 83, "(1)"
- line 429, "pan.___", state 84, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 84, "else"
- line 429, "pan.___", state 87, "(1)"
- line 429, "pan.___", state 88, "(1)"
- line 429, "pan.___", state 88, "(1)"
- line 433, "pan.___", state 96, "(1)"
- line 433, "pan.___", state 97, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 97, "else"
- line 433, "pan.___", state 100, "(1)"
- line 433, "pan.___", state 101, "(1)"
- line 433, "pan.___", state 101, "(1)"
- line 431, "pan.___", state 106, "((i<1))"
- line 431, "pan.___", state 106, "((i>=1))"
- line 438, "pan.___", state 113, "(1)"
- line 438, "pan.___", state 114, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 114, "else"
- line 438, "pan.___", state 117, "(1)"
- line 438, "pan.___", state 118, "(1)"
- line 438, "pan.___", state 118, "(1)"
- line 442, "pan.___", state 126, "(1)"
- line 442, "pan.___", state 127, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 127, "else"
- line 442, "pan.___", state 130, "(1)"
- line 442, "pan.___", state 131, "(1)"
- line 442, "pan.___", state 131, "(1)"
- line 440, "pan.___", state 136, "((i<2))"
- line 440, "pan.___", state 136, "((i>=2))"
- line 450, "pan.___", state 140, "(1)"
- line 450, "pan.___", state 140, "(1)"
- line 272, "pan.___", state 149, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 158, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 225, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 243, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 257, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 276, "(1)"
- line 433, "pan.___", state 289, "(1)"
- line 438, "pan.___", state 306, "(1)"
- line 442, "pan.___", state 319, "(1)"
- line 415, "pan.___", state 356, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 374, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 388, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 420, "(1)"
- line 438, "pan.___", state 437, "(1)"
- line 442, "pan.___", state 450, "(1)"
- line 415, "pan.___", state 495, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 513, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 559, "(1)"
- line 438, "pan.___", state 576, "(1)"
- line 442, "pan.___", state 589, "(1)"
- line 415, "pan.___", state 624, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 642, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 656, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 688, "(1)"
- line 438, "pan.___", state 705, "(1)"
- line 442, "pan.___", state 718, "(1)"
- line 415, "pan.___", state 755, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 773, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 787, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 819, "(1)"
- line 438, "pan.___", state 836, "(1)"
- line 442, "pan.___", state 849, "(1)"
- line 272, "pan.___", state 904, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 913, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 928, "(1)"
- line 284, "pan.___", state 935, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 951, "(1)"
- line 253, "pan.___", state 959, "(1)"
- line 257, "pan.___", state 971, "(1)"
- line 261, "pan.___", state 979, "(1)"
- line 276, "pan.___", state 1004, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1017, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1026, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1042, "(1)"
- line 253, "pan.___", state 1050, "(1)"
- line 257, "pan.___", state 1062, "(1)"
- line 261, "pan.___", state 1070, "(1)"
- line 276, "pan.___", state 1095, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1108, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1117, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1133, "(1)"
- line 253, "pan.___", state 1141, "(1)"
- line 257, "pan.___", state 1153, "(1)"
- line 261, "pan.___", state 1161, "(1)"
- line 276, "pan.___", state 1186, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1199, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1208, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1224, "(1)"
- line 253, "pan.___", state 1232, "(1)"
- line 257, "pan.___", state 1244, "(1)"
- line 261, "pan.___", state 1252, "(1)"
- line 1237, "pan.___", state 1267, "-end-"
- (96 of 1267 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 474 seconds
-pan: rate 1298.3425 states/second
-pan: avg transition delay 1.235e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define NO_RMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-1906:0:4630
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-1910:2:3760
-1911:2:3764
-1912:2:3765
-1913:2:3773
-1914:2:3774
-1915:2:3778
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-1917:2:3787
-1918:2:3792
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-1920:2:3797
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-1922:2:3806
-1923:2:3810
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-1927:2:3810
-1928:2:3811
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-1930:2:3824
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-1932:2:3836
-1933:2:3837
-1934:2:3838
-1935:2:3849
-1936:2:3854
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-1938:2:3866
-1939:2:3867
-1940:2:3868
-1941:2:3866
-1942:2:3867
-1943:2:3868
-1944:2:3879
-1945:0:4630
-1946:2:3295
-1947:0:4630
-1948:2:3755
-1949:0:4630
-1950:2:4278
-1951:2:4279
-1952:2:4283
-1953:2:4287
-1954:2:4288
-1955:2:4292
-1956:2:4300
-1957:2:4301
-1958:2:4305
-1959:2:4309
-1960:2:4310
-1961:2:4305
-1962:2:4309
-1963:2:4310
-1964:2:4314
-1965:2:4321
-1966:2:4328
-1967:2:4329
-1968:2:4336
-1969:2:4341
-1970:2:4348
-1971:2:4349
-1972:2:4348
-1973:2:4349
-1974:2:4356
-1975:2:4360
-1976:0:4630
-1977:1:3023
-1978:1:3027
-1979:1:3028
-1980:1:3036
-1981:1:3037
-1982:1:3041
-1983:1:3042
-1984:1:3050
-1985:1:3055
-1986:1:3059
-1987:1:3060
-1988:1:3068
-1989:1:3069
-1990:1:3073
-1991:1:3074
-1992:1:3068
-1993:1:3069
-1994:1:3073
-1995:1:3074
-1996:1:3082
-1997:1:3087
-1998:1:3088
-1999:1:3099
-2000:1:3100
-2001:1:3101
-2002:1:3112
-2003:1:3117
-2004:1:3118
-2005:1:3129
-2006:1:3130
-2007:1:3131
-2008:1:3129
-2009:1:3137
-2010:1:3138
-2011:1:3142
-2012:1:3146
-2013:0:4630
-2014:2:3757
-2015:2:3758
-2016:0:4630
-2017:2:3295
-2018:0:4630
-2019:2:3620
-2020:2:3621
-2021:2:3625
-2022:2:3626
-2023:2:3634
-2024:2:3635
-2025:2:3639
-2026:2:3640
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-2063:2:4283
-2064:2:4287
-2065:2:4288
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-2078:2:4329
-2079:2:4336
-2080:2:4341
-2081:2:4348
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-2086:2:4360
-2087:0:4630
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-2089:1:1292
-2090:0:4628
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-2093:1:3146
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 5131 States= 1e+06 Transitions= 5.44e+08 Memory= 550.432 t= 664 R= 2e+03
-Depth= 5131 States= 2e+06 Transitions= 1.26e+09 Memory= 634.318 t= 1.56e+03 R= 1e+03
-Depth= 5422 States= 3e+06 Transitions= 1.93e+09 Memory= 718.303 t= 2.43e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 5422 States= 4e+06 Transitions= 2.58e+09 Memory= 833.311 t= 3.23e+03 R= 1e+03
-Depth= 5422 States= 5e+06 Transitions= 3.25e+09 Memory= 917.295 t= 4.07e+03 R= 1e+03
-pan: claim violated! (at depth 1420)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5422, errors: 1
- 5523708 states, stored
-3.5450503e+09 states, matched
-3.550574e+09 transitions (= stored+matched)
-2.0146324e+10 atomic steps
-hash conflicts: 2.4095106e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 611.067 equivalent memory usage for states (stored*(State-vector + overhead))
- 471.813 actual memory usage for states (compression: 77.21%)
- state-vector as stored = 62 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 961.240 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 82, "(1)"
- line 438, "pan.___", state 112, "(1)"
- line 442, "pan.___", state 125, "(1)"
- line 597, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 218, "(1)"
- line 438, "pan.___", state 248, "(1)"
- line 442, "pan.___", state 261, "(1)"
- line 411, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 347, "(1)"
- line 438, "pan.___", state 377, "(1)"
- line 442, "pan.___", state 390, "(1)"
- line 411, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 415, "(1)"
- line 411, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 416, "else"
- line 411, "pan.___", state 419, "(1)"
- line 415, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 429, "(1)"
- line 415, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 430, "else"
- line 415, "pan.___", state 433, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 413, "pan.___", state 439, "((i<1))"
- line 413, "pan.___", state 439, "((i>=1))"
- line 420, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 447, "(1)"
- line 420, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 448, "else"
- line 420, "pan.___", state 451, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 424, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 461, "(1)"
- line 424, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 462, "else"
- line 424, "pan.___", state 465, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 422, "pan.___", state 471, "((i<2))"
- line 422, "pan.___", state 471, "((i>=2))"
- line 429, "pan.___", state 478, "(1)"
- line 429, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 479, "else"
- line 429, "pan.___", state 482, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 433, "pan.___", state 491, "(1)"
- line 433, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 492, "else"
- line 433, "pan.___", state 495, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 431, "pan.___", state 501, "((i<1))"
- line 431, "pan.___", state 501, "((i>=1))"
- line 438, "pan.___", state 508, "(1)"
- line 438, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 509, "else"
- line 438, "pan.___", state 512, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 442, "pan.___", state 521, "(1)"
- line 442, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 522, "else"
- line 442, "pan.___", state 525, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 440, "pan.___", state 531, "((i<2))"
- line 440, "pan.___", state 531, "((i>=2))"
- line 450, "pan.___", state 535, "(1)"
- line 450, "pan.___", state 535, "(1)"
- line 597, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 540, "(1)"
- line 272, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 555, "(1)"
- line 280, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 591, "(1)"
- line 253, "pan.___", state 599, "(1)"
- line 257, "pan.___", state 611, "(1)"
- line 261, "pan.___", state 619, "(1)"
- line 411, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 702, "(1)"
- line 433, "pan.___", state 715, "(1)"
- line 438, "pan.___", state 732, "(1)"
- line 442, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 838, "(1)"
- line 438, "pan.___", state 868, "(1)"
- line 442, "pan.___", state 881, "(1)"
- line 411, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 904, "(1)"
- line 411, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 905, "else"
- line 411, "pan.___", state 908, "(1)"
- line 415, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 918, "(1)"
- line 415, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 919, "else"
- line 415, "pan.___", state 922, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 413, "pan.___", state 928, "((i<1))"
- line 413, "pan.___", state 928, "((i>=1))"
- line 420, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 936, "(1)"
- line 420, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 937, "else"
- line 420, "pan.___", state 940, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 424, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 950, "(1)"
- line 424, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 951, "else"
- line 424, "pan.___", state 954, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 422, "pan.___", state 960, "((i<2))"
- line 422, "pan.___", state 960, "((i>=2))"
- line 429, "pan.___", state 967, "(1)"
- line 429, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 968, "else"
- line 429, "pan.___", state 971, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 433, "pan.___", state 980, "(1)"
- line 433, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 981, "else"
- line 433, "pan.___", state 984, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 431, "pan.___", state 990, "((i<1))"
- line 431, "pan.___", state 990, "((i>=1))"
- line 438, "pan.___", state 997, "(1)"
- line 438, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 998, "else"
- line 438, "pan.___", state 1001, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 442, "pan.___", state 1010, "(1)"
- line 442, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 1011, "else"
- line 442, "pan.___", state 1014, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 440, "pan.___", state 1020, "((i<2))"
- line 440, "pan.___", state 1020, "((i>=2))"
- line 450, "pan.___", state 1024, "(1)"
- line 450, "pan.___", state 1024, "(1)"
- line 605, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1098, "(1)"
- line 433, "pan.___", state 1111, "(1)"
- line 438, "pan.___", state 1128, "(1)"
- line 442, "pan.___", state 1141, "(1)"
- line 411, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1230, "(1)"
- line 438, "pan.___", state 1260, "(1)"
- line 442, "pan.___", state 1273, "(1)"
- line 411, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1363, "(1)"
- line 438, "pan.___", state 1393, "(1)"
- line 442, "pan.___", state 1406, "(1)"
- line 411, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1492, "(1)"
- line 438, "pan.___", state 1522, "(1)"
- line 442, "pan.___", state 1535, "(1)"
- line 272, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1605, "(1)"
- line 253, "pan.___", state 1613, "(1)"
- line 257, "pan.___", state 1625, "(1)"
- line 261, "pan.___", state 1633, "(1)"
- line 411, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1716, "(1)"
- line 433, "pan.___", state 1729, "(1)"
- line 438, "pan.___", state 1746, "(1)"
- line 442, "pan.___", state 1759, "(1)"
- line 411, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1845, "(1)"
- line 433, "pan.___", state 1858, "(1)"
- line 438, "pan.___", state 1875, "(1)"
- line 442, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1977, "(1)"
- line 438, "pan.___", state 2007, "(1)"
- line 442, "pan.___", state 2020, "(1)"
- line 644, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2113, "(1)"
- line 438, "pan.___", state 2143, "(1)"
- line 442, "pan.___", state 2156, "(1)"
- line 411, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2242, "(1)"
- line 438, "pan.___", state 2272, "(1)"
- line 442, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2310, "(1)"
- line 411, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2311, "else"
- line 411, "pan.___", state 2314, "(1)"
- line 415, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2324, "(1)"
- line 415, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2325, "else"
- line 415, "pan.___", state 2328, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 413, "pan.___", state 2334, "((i<1))"
- line 413, "pan.___", state 2334, "((i>=1))"
- line 420, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2342, "(1)"
- line 420, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2343, "else"
- line 420, "pan.___", state 2346, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 424, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2356, "(1)"
- line 424, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2357, "else"
- line 424, "pan.___", state 2360, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 422, "pan.___", state 2366, "((i<2))"
- line 422, "pan.___", state 2366, "((i>=2))"
- line 429, "pan.___", state 2373, "(1)"
- line 429, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 2374, "else"
- line 429, "pan.___", state 2377, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 433, "pan.___", state 2386, "(1)"
- line 433, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 2387, "else"
- line 433, "pan.___", state 2390, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 431, "pan.___", state 2396, "((i<1))"
- line 431, "pan.___", state 2396, "((i>=1))"
- line 438, "pan.___", state 2403, "(1)"
- line 438, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 2404, "else"
- line 438, "pan.___", state 2407, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 442, "pan.___", state 2416, "(1)"
- line 442, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 2417, "else"
- line 442, "pan.___", state 2420, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 440, "pan.___", state 2426, "((i<2))"
- line 440, "pan.___", state 2426, "((i>=2))"
- line 450, "pan.___", state 2430, "(1)"
- line 450, "pan.___", state 2430, "(1)"
- line 644, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2435, "(1)"
- line 272, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2486, "(1)"
- line 253, "pan.___", state 2494, "(1)"
- line 257, "pan.___", state 2506, "(1)"
- line 261, "pan.___", state 2514, "(1)"
- line 411, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2597, "(1)"
- line 433, "pan.___", state 2610, "(1)"
- line 438, "pan.___", state 2627, "(1)"
- line 442, "pan.___", state 2640, "(1)"
- line 272, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2711, "(1)"
- line 253, "pan.___", state 2719, "(1)"
- line 257, "pan.___", state 2731, "(1)"
- line 261, "pan.___", state 2739, "(1)"
- line 411, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2822, "(1)"
- line 433, "pan.___", state 2835, "(1)"
- line 438, "pan.___", state 2852, "(1)"
- line 442, "pan.___", state 2865, "(1)"
- line 411, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2951, "(1)"
- line 433, "pan.___", state 2964, "(1)"
- line 438, "pan.___", state 2981, "(1)"
- line 442, "pan.___", state 2994, "(1)"
- line 249, "pan.___", state 3027, "(1)"
- line 257, "pan.___", state 3047, "(1)"
- line 261, "pan.___", state 3055, "(1)"
- line 249, "pan.___", state 3070, "(1)"
- line 253, "pan.___", state 3078, "(1)"
- line 257, "pan.___", state 3090, "(1)"
- line 261, "pan.___", state 3098, "(1)"
- line 898, "pan.___", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 19, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 33, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 84, "(1)"
- line 433, "pan.___", state 97, "(1)"
- line 272, "pan.___", state 150, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 152, "(1)"
- line 276, "pan.___", state 159, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 161, "(1)"
- line 276, "pan.___", state 162, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 162, "else"
- line 274, "pan.___", state 167, "((i<1))"
- line 274, "pan.___", state 167, "((i>=1))"
- line 280, "pan.___", state 172, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 174, "(1)"
- line 280, "pan.___", state 175, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 175, "else"
- line 284, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 183, "(1)"
- line 284, "pan.___", state 184, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 184, "else"
- line 289, "pan.___", state 193, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 193, "else"
- line 411, "pan.___", state 212, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 226, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 244, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 258, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 277, "(1)"
- line 433, "pan.___", state 290, "(1)"
- line 438, "pan.___", state 307, "(1)"
- line 442, "pan.___", state 320, "(1)"
- line 415, "pan.___", state 357, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 375, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 389, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 421, "(1)"
- line 438, "pan.___", state 438, "(1)"
- line 442, "pan.___", state 451, "(1)"
- line 415, "pan.___", state 496, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 514, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 528, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 560, "(1)"
- line 438, "pan.___", state 577, "(1)"
- line 442, "pan.___", state 590, "(1)"
- line 415, "pan.___", state 625, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 643, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 657, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 689, "(1)"
- line 438, "pan.___", state 706, "(1)"
- line 442, "pan.___", state 719, "(1)"
- line 415, "pan.___", state 756, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 774, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 788, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 820, "(1)"
- line 438, "pan.___", state 837, "(1)"
- line 442, "pan.___", state 850, "(1)"
- line 272, "pan.___", state 905, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 914, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 952, "(1)"
- line 253, "pan.___", state 960, "(1)"
- line 257, "pan.___", state 972, "(1)"
- line 261, "pan.___", state 980, "(1)"
- line 276, "pan.___", state 1005, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1018, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1027, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1043, "(1)"
- line 253, "pan.___", state 1051, "(1)"
- line 257, "pan.___", state 1063, "(1)"
- line 261, "pan.___", state 1071, "(1)"
- line 276, "pan.___", state 1096, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1109, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1118, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1134, "(1)"
- line 253, "pan.___", state 1142, "(1)"
- line 257, "pan.___", state 1154, "(1)"
- line 261, "pan.___", state 1162, "(1)"
- line 276, "pan.___", state 1187, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1200, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1209, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1225, "(1)"
- line 253, "pan.___", state 1233, "(1)"
- line 257, "pan.___", state 1245, "(1)"
- line 261, "pan.___", state 1253, "(1)"
- line 1237, "pan.___", state 1268, "-end-"
- (77 of 1268 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 4.43e+03 seconds
-pan: rate 1246.6728 states/second
-pan: avg transition delay 1.2479e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define NO_WMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-1409:2:4181
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-1411:2:4181
-1412:2:4182
-1413:2:4189
-1414:2:4193
-1415:0:4463
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-1418:0:4461
-1419:1:11
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-1421:1:2299
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 5164 States= 1e+06 Transitions= 4.75e+08 Memory= 550.432 t= 582 R= 2e+03
-Depth= 5746 States= 2e+06 Transitions= 1.02e+09 Memory= 634.318 t= 1.27e+03 R= 2e+03
-pan: claim violated! (at depth 1144)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5746, errors: 1
- 2322493 states, stored
-1.1944827e+09 states, matched
-1.1968052e+09 transitions (= stored+matched)
-6.6651798e+09 atomic steps
-hash conflicts: 7.6855101e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 256.929 equivalent memory usage for states (stored*(State-vector + overhead))
- 195.871 actual memory usage for states (compression: 76.24%)
- state-vector as stored = 60 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 661.467 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 82, "(1)"
- line 438, "pan.___", state 112, "(1)"
- line 442, "pan.___", state 125, "(1)"
- line 597, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 218, "(1)"
- line 438, "pan.___", state 248, "(1)"
- line 442, "pan.___", state 261, "(1)"
- line 411, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 347, "(1)"
- line 438, "pan.___", state 377, "(1)"
- line 442, "pan.___", state 390, "(1)"
- line 411, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 415, "(1)"
- line 411, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 416, "else"
- line 411, "pan.___", state 419, "(1)"
- line 415, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 429, "(1)"
- line 415, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 430, "else"
- line 415, "pan.___", state 433, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 413, "pan.___", state 439, "((i<1))"
- line 413, "pan.___", state 439, "((i>=1))"
- line 420, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 447, "(1)"
- line 420, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 448, "else"
- line 420, "pan.___", state 451, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 424, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 461, "(1)"
- line 424, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 462, "else"
- line 424, "pan.___", state 465, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 422, "pan.___", state 471, "((i<2))"
- line 422, "pan.___", state 471, "((i>=2))"
- line 429, "pan.___", state 478, "(1)"
- line 429, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 479, "else"
- line 429, "pan.___", state 482, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 433, "pan.___", state 491, "(1)"
- line 433, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 492, "else"
- line 433, "pan.___", state 495, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 431, "pan.___", state 501, "((i<1))"
- line 431, "pan.___", state 501, "((i>=1))"
- line 438, "pan.___", state 508, "(1)"
- line 438, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 509, "else"
- line 438, "pan.___", state 512, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 442, "pan.___", state 521, "(1)"
- line 442, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 522, "else"
- line 442, "pan.___", state 525, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 440, "pan.___", state 531, "((i<2))"
- line 440, "pan.___", state 531, "((i>=2))"
- line 450, "pan.___", state 535, "(1)"
- line 450, "pan.___", state 535, "(1)"
- line 597, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 540, "(1)"
- line 272, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 555, "(1)"
- line 280, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 591, "(1)"
- line 253, "pan.___", state 599, "(1)"
- line 257, "pan.___", state 611, "(1)"
- line 261, "pan.___", state 619, "(1)"
- line 411, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 702, "(1)"
- line 433, "pan.___", state 715, "(1)"
- line 438, "pan.___", state 732, "(1)"
- line 442, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 838, "(1)"
- line 438, "pan.___", state 868, "(1)"
- line 442, "pan.___", state 881, "(1)"
- line 411, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 904, "(1)"
- line 411, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 905, "else"
- line 411, "pan.___", state 908, "(1)"
- line 415, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 918, "(1)"
- line 415, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 919, "else"
- line 415, "pan.___", state 922, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 413, "pan.___", state 928, "((i<1))"
- line 413, "pan.___", state 928, "((i>=1))"
- line 420, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 936, "(1)"
- line 420, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 937, "else"
- line 420, "pan.___", state 940, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 424, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 950, "(1)"
- line 424, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 951, "else"
- line 424, "pan.___", state 954, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 422, "pan.___", state 960, "((i<2))"
- line 422, "pan.___", state 960, "((i>=2))"
- line 429, "pan.___", state 967, "(1)"
- line 429, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 968, "else"
- line 429, "pan.___", state 971, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 433, "pan.___", state 980, "(1)"
- line 433, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 981, "else"
- line 433, "pan.___", state 984, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 431, "pan.___", state 990, "((i<1))"
- line 431, "pan.___", state 990, "((i>=1))"
- line 438, "pan.___", state 997, "(1)"
- line 438, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 998, "else"
- line 438, "pan.___", state 1001, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 442, "pan.___", state 1010, "(1)"
- line 442, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 1011, "else"
- line 442, "pan.___", state 1014, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 440, "pan.___", state 1020, "((i<2))"
- line 440, "pan.___", state 1020, "((i>=2))"
- line 450, "pan.___", state 1024, "(1)"
- line 450, "pan.___", state 1024, "(1)"
- line 605, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1098, "(1)"
- line 433, "pan.___", state 1111, "(1)"
- line 438, "pan.___", state 1128, "(1)"
- line 442, "pan.___", state 1141, "(1)"
- line 411, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1230, "(1)"
- line 438, "pan.___", state 1260, "(1)"
- line 442, "pan.___", state 1273, "(1)"
- line 411, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1363, "(1)"
- line 438, "pan.___", state 1393, "(1)"
- line 442, "pan.___", state 1406, "(1)"
- line 411, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1492, "(1)"
- line 438, "pan.___", state 1522, "(1)"
- line 442, "pan.___", state 1535, "(1)"
- line 272, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1605, "(1)"
- line 253, "pan.___", state 1613, "(1)"
- line 257, "pan.___", state 1625, "(1)"
- line 261, "pan.___", state 1633, "(1)"
- line 411, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1716, "(1)"
- line 433, "pan.___", state 1729, "(1)"
- line 438, "pan.___", state 1746, "(1)"
- line 442, "pan.___", state 1759, "(1)"
- line 411, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1845, "(1)"
- line 433, "pan.___", state 1858, "(1)"
- line 438, "pan.___", state 1875, "(1)"
- line 442, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1977, "(1)"
- line 438, "pan.___", state 2007, "(1)"
- line 442, "pan.___", state 2020, "(1)"
- line 644, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2113, "(1)"
- line 438, "pan.___", state 2143, "(1)"
- line 442, "pan.___", state 2156, "(1)"
- line 411, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2242, "(1)"
- line 438, "pan.___", state 2272, "(1)"
- line 442, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2310, "(1)"
- line 411, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2311, "else"
- line 411, "pan.___", state 2314, "(1)"
- line 415, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2324, "(1)"
- line 415, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2325, "else"
- line 415, "pan.___", state 2328, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 413, "pan.___", state 2334, "((i<1))"
- line 413, "pan.___", state 2334, "((i>=1))"
- line 420, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2342, "(1)"
- line 420, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2343, "else"
- line 420, "pan.___", state 2346, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 424, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2356, "(1)"
- line 424, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2357, "else"
- line 424, "pan.___", state 2360, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 422, "pan.___", state 2366, "((i<2))"
- line 422, "pan.___", state 2366, "((i>=2))"
- line 429, "pan.___", state 2373, "(1)"
- line 429, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 2374, "else"
- line 429, "pan.___", state 2377, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 433, "pan.___", state 2386, "(1)"
- line 433, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 2387, "else"
- line 433, "pan.___", state 2390, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 431, "pan.___", state 2396, "((i<1))"
- line 431, "pan.___", state 2396, "((i>=1))"
- line 438, "pan.___", state 2403, "(1)"
- line 438, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 2404, "else"
- line 438, "pan.___", state 2407, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 442, "pan.___", state 2416, "(1)"
- line 442, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 2417, "else"
- line 442, "pan.___", state 2420, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 440, "pan.___", state 2426, "((i<2))"
- line 440, "pan.___", state 2426, "((i>=2))"
- line 450, "pan.___", state 2430, "(1)"
- line 450, "pan.___", state 2430, "(1)"
- line 644, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2435, "(1)"
- line 272, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2486, "(1)"
- line 253, "pan.___", state 2494, "(1)"
- line 257, "pan.___", state 2506, "(1)"
- line 261, "pan.___", state 2514, "(1)"
- line 411, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2597, "(1)"
- line 433, "pan.___", state 2610, "(1)"
- line 438, "pan.___", state 2627, "(1)"
- line 442, "pan.___", state 2640, "(1)"
- line 272, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2711, "(1)"
- line 253, "pan.___", state 2719, "(1)"
- line 257, "pan.___", state 2731, "(1)"
- line 261, "pan.___", state 2739, "(1)"
- line 411, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2822, "(1)"
- line 433, "pan.___", state 2835, "(1)"
- line 438, "pan.___", state 2852, "(1)"
- line 442, "pan.___", state 2865, "(1)"
- line 411, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2951, "(1)"
- line 433, "pan.___", state 2964, "(1)"
- line 438, "pan.___", state 2981, "(1)"
- line 442, "pan.___", state 2994, "(1)"
- line 249, "pan.___", state 3027, "(1)"
- line 257, "pan.___", state 3047, "(1)"
- line 261, "pan.___", state 3055, "(1)"
- line 249, "pan.___", state 3070, "(1)"
- line 253, "pan.___", state 3078, "(1)"
- line 257, "pan.___", state 3090, "(1)"
- line 261, "pan.___", state 3098, "(1)"
- line 898, "pan.___", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 22, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 36, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 54, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 87, "(1)"
- line 433, "pan.___", state 100, "(1)"
- line 438, "pan.___", state 117, "(1)"
- line 272, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 162, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 175, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 215, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 229, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 247, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 261, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 280, "(1)"
- line 433, "pan.___", state 293, "(1)"
- line 438, "pan.___", state 310, "(1)"
- line 442, "pan.___", state 323, "(1)"
- line 415, "pan.___", state 360, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 378, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 392, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 424, "(1)"
- line 438, "pan.___", state 441, "(1)"
- line 442, "pan.___", state 454, "(1)"
- line 411, "pan.___", state 484, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 498, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 516, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 530, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 549, "(1)"
- line 433, "pan.___", state 562, "(1)"
- line 438, "pan.___", state 579, "(1)"
- line 442, "pan.___", state 592, "(1)"
- line 411, "pan.___", state 613, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 615, "(1)"
- line 411, "pan.___", state 616, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 616, "else"
- line 411, "pan.___", state 619, "(1)"
- line 415, "pan.___", state 627, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 629, "(1)"
- line 415, "pan.___", state 630, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 630, "else"
- line 415, "pan.___", state 633, "(1)"
- line 415, "pan.___", state 634, "(1)"
- line 415, "pan.___", state 634, "(1)"
- line 413, "pan.___", state 639, "((i<1))"
- line 413, "pan.___", state 639, "((i>=1))"
- line 420, "pan.___", state 645, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 647, "(1)"
- line 420, "pan.___", state 648, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 648, "else"
- line 420, "pan.___", state 651, "(1)"
- line 420, "pan.___", state 652, "(1)"
- line 420, "pan.___", state 652, "(1)"
- line 424, "pan.___", state 659, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 661, "(1)"
- line 424, "pan.___", state 662, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 662, "else"
- line 424, "pan.___", state 665, "(1)"
- line 424, "pan.___", state 666, "(1)"
- line 424, "pan.___", state 666, "(1)"
- line 422, "pan.___", state 671, "((i<2))"
- line 422, "pan.___", state 671, "((i>=2))"
- line 429, "pan.___", state 678, "(1)"
- line 429, "pan.___", state 679, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 679, "else"
- line 429, "pan.___", state 682, "(1)"
- line 429, "pan.___", state 683, "(1)"
- line 429, "pan.___", state 683, "(1)"
- line 433, "pan.___", state 691, "(1)"
- line 433, "pan.___", state 692, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 692, "else"
- line 433, "pan.___", state 695, "(1)"
- line 433, "pan.___", state 696, "(1)"
- line 433, "pan.___", state 696, "(1)"
- line 431, "pan.___", state 701, "((i<1))"
- line 431, "pan.___", state 701, "((i>=1))"
- line 438, "pan.___", state 708, "(1)"
- line 438, "pan.___", state 709, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 709, "else"
- line 438, "pan.___", state 712, "(1)"
- line 438, "pan.___", state 713, "(1)"
- line 438, "pan.___", state 713, "(1)"
- line 442, "pan.___", state 721, "(1)"
- line 442, "pan.___", state 722, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 722, "else"
- line 442, "pan.___", state 725, "(1)"
- line 442, "pan.___", state 726, "(1)"
- line 442, "pan.___", state 726, "(1)"
- line 440, "pan.___", state 731, "((i<2))"
- line 440, "pan.___", state 731, "((i>=2))"
- line 450, "pan.___", state 735, "(1)"
- line 450, "pan.___", state 735, "(1)"
- line 1117, "pan.___", state 739, "_proc_urcu_writer = (_proc_urcu_writer|(1<<10))"
- line 411, "pan.___", state 744, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 746, "(1)"
- line 411, "pan.___", state 747, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 747, "else"
- line 411, "pan.___", state 750, "(1)"
- line 415, "pan.___", state 758, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 760, "(1)"
- line 415, "pan.___", state 761, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 761, "else"
- line 415, "pan.___", state 764, "(1)"
- line 415, "pan.___", state 765, "(1)"
- line 415, "pan.___", state 765, "(1)"
- line 413, "pan.___", state 770, "((i<1))"
- line 413, "pan.___", state 770, "((i>=1))"
- line 420, "pan.___", state 776, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 778, "(1)"
- line 420, "pan.___", state 779, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 779, "else"
- line 420, "pan.___", state 782, "(1)"
- line 420, "pan.___", state 783, "(1)"
- line 420, "pan.___", state 783, "(1)"
- line 424, "pan.___", state 790, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 792, "(1)"
- line 424, "pan.___", state 793, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 793, "else"
- line 424, "pan.___", state 796, "(1)"
- line 424, "pan.___", state 797, "(1)"
- line 424, "pan.___", state 797, "(1)"
- line 422, "pan.___", state 802, "((i<2))"
- line 422, "pan.___", state 802, "((i>=2))"
- line 429, "pan.___", state 809, "(1)"
- line 429, "pan.___", state 810, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 810, "else"
- line 429, "pan.___", state 813, "(1)"
- line 429, "pan.___", state 814, "(1)"
- line 429, "pan.___", state 814, "(1)"
- line 433, "pan.___", state 822, "(1)"
- line 433, "pan.___", state 823, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 823, "else"
- line 433, "pan.___", state 826, "(1)"
- line 433, "pan.___", state 827, "(1)"
- line 433, "pan.___", state 827, "(1)"
- line 431, "pan.___", state 832, "((i<1))"
- line 431, "pan.___", state 832, "((i>=1))"
- line 438, "pan.___", state 839, "(1)"
- line 438, "pan.___", state 840, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 840, "else"
- line 438, "pan.___", state 843, "(1)"
- line 438, "pan.___", state 844, "(1)"
- line 438, "pan.___", state 844, "(1)"
- line 442, "pan.___", state 852, "(1)"
- line 442, "pan.___", state 853, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 853, "else"
- line 442, "pan.___", state 856, "(1)"
- line 442, "pan.___", state 857, "(1)"
- line 442, "pan.___", state 857, "(1)"
- line 440, "pan.___", state 862, "((i<2))"
- line 440, "pan.___", state 862, "((i>=2))"
- line 450, "pan.___", state 866, "(1)"
- line 450, "pan.___", state 866, "(1)"
- line 1133, "pan.___", state 871, "_proc_urcu_writer = (_proc_urcu_writer|(1<<11))"
- line 1128, "pan.___", state 872, "(((tmp2&((1<<7)-1))&&((tmp2^0)&(1<<7))))"
- line 1128, "pan.___", state 872, "else"
- line 1153, "pan.___", state 876, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<12)|(1<<11))))"
- line 272, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 931, "(1)"
- line 284, "pan.___", state 938, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 954, "(1)"
- line 253, "pan.___", state 962, "(1)"
- line 257, "pan.___", state 974, "(1)"
- line 261, "pan.___", state 982, "(1)"
- line 276, "pan.___", state 1007, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1020, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1029, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1045, "(1)"
- line 253, "pan.___", state 1053, "(1)"
- line 257, "pan.___", state 1065, "(1)"
- line 261, "pan.___", state 1073, "(1)"
- line 272, "pan.___", state 1089, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1091, "(1)"
- line 276, "pan.___", state 1098, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1100, "(1)"
- line 276, "pan.___", state 1101, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1101, "else"
- line 274, "pan.___", state 1106, "((i<1))"
- line 274, "pan.___", state 1106, "((i>=1))"
- line 280, "pan.___", state 1111, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1113, "(1)"
- line 280, "pan.___", state 1114, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1114, "else"
- line 284, "pan.___", state 1120, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1122, "(1)"
- line 284, "pan.___", state 1123, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1123, "else"
- line 282, "pan.___", state 1128, "((i<2))"
- line 282, "pan.___", state 1128, "((i>=2))"
- line 249, "pan.___", state 1136, "(1)"
- line 253, "pan.___", state 1144, "(1)"
- line 253, "pan.___", state 1145, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1145, "else"
- line 251, "pan.___", state 1150, "((i<1))"
- line 251, "pan.___", state 1150, "((i>=1))"
- line 257, "pan.___", state 1156, "(1)"
- line 257, "pan.___", state 1157, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1157, "else"
- line 261, "pan.___", state 1164, "(1)"
- line 261, "pan.___", state 1165, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1165, "else"
- line 266, "pan.___", state 1174, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1174, "else"
- line 299, "pan.___", state 1176, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1176, "else"
- line 276, "pan.___", state 1189, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1202, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1227, "(1)"
- line 253, "pan.___", state 1235, "(1)"
- line 257, "pan.___", state 1247, "(1)"
- line 261, "pan.___", state 1255, "(1)"
- line 1237, "pan.___", state 1270, "-end-"
- (161 of 1270 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.49e+03 seconds
-pan: rate 1556.4638 states/second
-pan: avg transition delay 1.2468e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define SINGLE_FLIP
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
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-922:0:4465
-923:2:4022
-924:2:4023
-925:2:4027
-926:2:4031
-927:2:4032
-928:2:4036
-929:2:4041
-930:2:4049
-931:2:4053
-932:2:4054
-933:2:4049
-934:2:4053
-935:2:4054
-936:2:4058
-937:2:4065
-938:2:4072
-939:2:4073
-940:2:4080
-941:2:4085
-942:2:4092
-943:2:4093
-944:2:4092
-945:2:4093
-946:2:4100
-947:2:4104
-948:0:4465
-949:2:3321
-950:2:4003
-951:0:4465
-952:2:3131
-953:0:4465
-954:2:3322
-955:0:4465
-956:2:3131
-957:0:4465
-958:2:3325
-959:2:3326
-960:2:3330
-961:2:3331
-962:2:3339
-963:2:3340
-964:2:3344
-965:2:3345
-966:2:3353
-967:2:3358
-968:2:3362
-969:2:3363
-970:2:3371
-971:2:3372
-972:2:3376
-973:2:3377
-974:2:3371
-975:2:3372
-976:2:3376
-977:2:3377
-978:2:3385
-979:2:3390
-980:2:3391
-981:2:3402
-982:2:3403
-983:2:3404
-984:2:3415
-985:2:3420
-986:2:3421
-987:2:3432
-988:2:3433
-989:2:3434
-990:2:3432
-991:2:3433
-992:2:3434
-993:2:3445
-994:2:3452
-995:0:4465
-996:2:3131
-997:0:4465
-998:2:3456
-999:2:3457
-1000:2:3458
-1001:2:3470
-1002:2:3471
-1003:2:3475
-1004:2:3476
-1005:2:3484
-1006:2:3489
-1007:2:3493
-1008:2:3494
-1009:2:3502
-1010:2:3503
-1011:2:3507
-1012:2:3508
-1013:2:3502
-1014:2:3503
-1015:2:3507
-1016:2:3508
-1017:2:3516
-1018:2:3521
-1019:2:3522
-1020:2:3533
-1021:2:3534
-1022:2:3535
-1023:2:3546
-1024:2:3551
-1025:2:3552
-1026:2:3563
-1027:2:3564
-1028:2:3565
-1029:2:3563
-1030:2:3564
-1031:2:3565
-1032:2:3576
-1033:2:3584
-1034:0:4465
-1035:2:3131
-1036:0:4465
-1037:2:3590
-1038:0:4465
-1039:2:4113
-1040:2:4114
-1041:2:4118
-1042:2:4122
-1043:2:4123
-1044:2:4127
-1045:2:4135
-1046:2:4136
-1047:2:4140
-1048:2:4144
-1049:2:4145
-1050:2:4140
-1051:2:4144
-1052:2:4145
-1053:2:4149
-1054:2:4156
-1055:2:4163
-1056:2:4164
-1057:2:4171
-1058:2:4176
-1059:2:4183
-1060:2:4184
-1061:2:4183
-1062:2:4184
-1063:2:4191
-1064:2:4195
-1065:0:4465
-1066:2:3592
-1067:2:3593
-1068:0:4465
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-1072:2:3457
-1073:2:3461
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-1075:2:3470
-1076:2:3471
-1077:2:3475
-1078:2:3476
-1079:2:3484
-1080:2:3489
-1081:2:3493
-1082:2:3494
-1083:2:3502
-1084:2:3503
-1085:2:3507
-1086:2:3508
-1087:2:3502
-1088:2:3503
-1089:2:3507
-1090:2:3508
-1091:2:3516
-1092:2:3521
-1093:2:3522
-1094:2:3533
-1095:2:3534
-1096:2:3535
-1097:2:3546
-1098:2:3551
-1099:2:3552
-1100:2:3563
-1101:2:3564
-1102:2:3565
-1103:2:3563
-1104:2:3564
-1105:2:3565
-1106:2:3576
-1107:2:3584
-1108:0:4465
-1109:2:3131
-1110:0:4465
-1111:2:3590
-1112:0:4465
-1113:2:4113
-1114:2:4114
-1115:2:4118
-1116:2:4122
-1117:2:4123
-1118:2:4127
-1119:2:4135
-1120:2:4136
-1121:2:4140
-1122:2:4144
-1123:2:4145
-1124:2:4140
-1125:2:4144
-1126:2:4145
-1127:2:4149
-1128:2:4156
-1129:2:4163
-1130:2:4164
-1131:2:4171
-1132:2:4176
-1133:2:4183
-1134:2:4184
-1135:2:4183
-1136:2:4184
-1137:2:4191
-1138:2:4195
-1139:0:4465
-1140:1:1291
-1141:1:1292
-1142:0:4463
-1143:1:11
-1144:0:4469
-1145:2:3684
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-depth 23: Claim reached state 9 (line 1300)
-depth 1143: Claim reached state 9 (line 1299)
-Depth= 6515 States= 1e+06 Transitions= 5.44e+08 Memory= 507.561 t= 715 R= 1e+03
-Depth= 6515 States= 2e+06 Transitions= 1.44e+09 Memory= 545.940 t= 1.93e+03 R= 1e+03
-Depth= 6515 States= 3e+06 Transitions= 2.29e+09 Memory= 584.416 t= 3.08e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 6515 States= 4e+06 Transitions= 3.07e+09 Memory= 646.299 t= 4.13e+03 R= 1e+03
-Depth= 6515 States= 5e+06 Transitions= 3.84e+09 Memory= 681.065 t= 5.17e+03 R= 1e+03
-Depth= 6515 States= 6e+06 Transitions= 4.91e+09 Memory= 728.916 t= 6.63e+03 R= 9e+02
-Depth= 6515 States= 7e+06 Transitions= 5.88e+09 Memory= 767.393 t= 7.96e+03 R= 9e+02
-Depth= 6515 States= 8e+06 Transitions= 6.76e+09 Memory= 808.018 t= 9.16e+03 R= 9e+02
-Depth= 6515 States= 9e+06 Transitions= 7.69e+09 Memory= 846.885 t= 1.04e+04 R= 9e+02
-pan: resizing hashtable to -w24.. done
-Depth= 6515 States= 1e+07 Transitions= 8.63e+09 Memory= 1015.705 t= 1.17e+04 R= 9e+02
-Depth= 6515 States= 1.1e+07 Transitions= 9.44e+09 Memory= 1054.572 t= 1.28e+04 R= 9e+02
-Depth= 6515 States= 1.2e+07 Transitions= 1.02e+10 Memory= 1095.490 t= 1.39e+04 R= 9e+02
-Depth= 6515 States= 1.3e+07 Transitions= 1.11e+10 Memory= 1129.182 t= 1.51e+04 R= 9e+02
-Depth= 6515 States= 1.4e+07 Transitions= 1.22e+10 Memory= 1173.518 t= 1.65e+04 R= 8e+02
-Depth= 6515 States= 1.5e+07 Transitions= 1.3e+10 Memory= 1207.893 t= 1.76e+04 R= 9e+02
-Depth= 6515 States= 1.6e+07 Transitions= 1.38e+10 Memory= 1234.065 t= 1.86e+04 R= 9e+02
-Depth= 6515 States= 1.7e+07 Transitions= 1.47e+10 Memory= 1277.424 t= 1.99e+04 R= 9e+02
-Depth= 6515 States= 1.8e+07 Transitions= 1.58e+10 Memory= 1325.568 t= 2.13e+04 R= 8e+02
-Depth= 6515 States= 1.9e+07 Transitions= 1.67e+10 Memory= 1366.486 t= 2.26e+04 R= 8e+02
-Depth= 6515 States= 2e+07 Transitions= 1.76e+10 Memory= 1405.940 t= 2.38e+04 R= 8e+02
-Depth= 6515 States= 2.1e+07 Transitions= 1.85e+10 Memory= 1450.080 t= 2.51e+04 R= 8e+02
-Depth= 6515 States= 2.2e+07 Transitions= 1.94e+10 Memory= 1491.291 t= 2.63e+04 R= 8e+02
-Depth= 6515 States= 2.3e+07 Transitions= 2.02e+10 Memory= 1530.744 t= 2.74e+04 R= 8e+02
-Depth= 6515 States= 2.4e+07 Transitions= 2.12e+10 Memory= 1565.217 t= 2.87e+04 R= 8e+02
-Depth= 6515 States= 2.5e+07 Transitions= 2.22e+10 Memory= 1608.479 t= 3e+04 R= 8e+02
-Depth= 6515 States= 2.6e+07 Transitions= 2.3e+10 Memory= 1634.651 t= 3.11e+04 R= 8e+02
-Depth= 6515 States= 2.7e+07 Transitions= 2.4e+10 Memory= 1685.725 t= 3.25e+04 R= 8e+02
-Depth= 6515 States= 2.8e+07 Transitions= 2.49e+10 Memory= 1724.885 t= 3.37e+04 R= 8e+02
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 6515, errors: 0
- 13561338 states, stored (2.88138e+07 visited)
-2.5567499e+10 states, matched
-2.5596313e+10 transitions (= visited+matched)
-1.4615258e+11 atomic steps
-hash conflicts: 8.6536644e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1500.240 equivalent memory usage for states (stored*(State-vector + overhead))
- 1175.180 actual memory usage for states (compression: 78.33%)
- state-vector as stored = 63 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1760.236 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 82, "(1)"
- line 438, "pan.___", state 112, "(1)"
- line 442, "pan.___", state 125, "(1)"
- line 597, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 218, "(1)"
- line 438, "pan.___", state 248, "(1)"
- line 442, "pan.___", state 261, "(1)"
- line 411, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 347, "(1)"
- line 438, "pan.___", state 377, "(1)"
- line 442, "pan.___", state 390, "(1)"
- line 411, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 415, "(1)"
- line 411, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 416, "else"
- line 411, "pan.___", state 419, "(1)"
- line 415, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 429, "(1)"
- line 415, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 430, "else"
- line 415, "pan.___", state 433, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 413, "pan.___", state 439, "((i<1))"
- line 413, "pan.___", state 439, "((i>=1))"
- line 420, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 447, "(1)"
- line 420, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 448, "else"
- line 420, "pan.___", state 451, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 424, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 461, "(1)"
- line 424, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 462, "else"
- line 424, "pan.___", state 465, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 422, "pan.___", state 471, "((i<2))"
- line 422, "pan.___", state 471, "((i>=2))"
- line 429, "pan.___", state 478, "(1)"
- line 429, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 479, "else"
- line 429, "pan.___", state 482, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 433, "pan.___", state 491, "(1)"
- line 433, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 492, "else"
- line 433, "pan.___", state 495, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 431, "pan.___", state 501, "((i<1))"
- line 431, "pan.___", state 501, "((i>=1))"
- line 438, "pan.___", state 508, "(1)"
- line 438, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 509, "else"
- line 438, "pan.___", state 512, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 442, "pan.___", state 521, "(1)"
- line 442, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 522, "else"
- line 442, "pan.___", state 525, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 440, "pan.___", state 531, "((i<2))"
- line 440, "pan.___", state 531, "((i>=2))"
- line 450, "pan.___", state 535, "(1)"
- line 450, "pan.___", state 535, "(1)"
- line 597, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 540, "(1)"
- line 272, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 555, "(1)"
- line 280, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 591, "(1)"
- line 253, "pan.___", state 599, "(1)"
- line 257, "pan.___", state 611, "(1)"
- line 261, "pan.___", state 619, "(1)"
- line 411, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 702, "(1)"
- line 433, "pan.___", state 715, "(1)"
- line 438, "pan.___", state 732, "(1)"
- line 442, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 838, "(1)"
- line 438, "pan.___", state 868, "(1)"
- line 442, "pan.___", state 881, "(1)"
- line 411, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 904, "(1)"
- line 411, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 905, "else"
- line 411, "pan.___", state 908, "(1)"
- line 415, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 918, "(1)"
- line 415, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 919, "else"
- line 415, "pan.___", state 922, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 413, "pan.___", state 928, "((i<1))"
- line 413, "pan.___", state 928, "((i>=1))"
- line 420, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 936, "(1)"
- line 420, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 937, "else"
- line 420, "pan.___", state 940, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 424, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 950, "(1)"
- line 424, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 951, "else"
- line 424, "pan.___", state 954, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 422, "pan.___", state 960, "((i<2))"
- line 422, "pan.___", state 960, "((i>=2))"
- line 429, "pan.___", state 967, "(1)"
- line 429, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 968, "else"
- line 429, "pan.___", state 971, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 433, "pan.___", state 980, "(1)"
- line 433, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 981, "else"
- line 433, "pan.___", state 984, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 431, "pan.___", state 990, "((i<1))"
- line 431, "pan.___", state 990, "((i>=1))"
- line 438, "pan.___", state 997, "(1)"
- line 438, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 998, "else"
- line 438, "pan.___", state 1001, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 442, "pan.___", state 1010, "(1)"
- line 442, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 1011, "else"
- line 442, "pan.___", state 1014, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 440, "pan.___", state 1020, "((i<2))"
- line 440, "pan.___", state 1020, "((i>=2))"
- line 450, "pan.___", state 1024, "(1)"
- line 450, "pan.___", state 1024, "(1)"
- line 605, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1098, "(1)"
- line 433, "pan.___", state 1111, "(1)"
- line 438, "pan.___", state 1128, "(1)"
- line 442, "pan.___", state 1141, "(1)"
- line 411, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1230, "(1)"
- line 438, "pan.___", state 1260, "(1)"
- line 442, "pan.___", state 1273, "(1)"
- line 411, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1363, "(1)"
- line 438, "pan.___", state 1393, "(1)"
- line 442, "pan.___", state 1406, "(1)"
- line 411, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1492, "(1)"
- line 438, "pan.___", state 1522, "(1)"
- line 442, "pan.___", state 1535, "(1)"
- line 272, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1605, "(1)"
- line 253, "pan.___", state 1613, "(1)"
- line 257, "pan.___", state 1625, "(1)"
- line 261, "pan.___", state 1633, "(1)"
- line 411, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1716, "(1)"
- line 433, "pan.___", state 1729, "(1)"
- line 438, "pan.___", state 1746, "(1)"
- line 442, "pan.___", state 1759, "(1)"
- line 411, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1845, "(1)"
- line 433, "pan.___", state 1858, "(1)"
- line 438, "pan.___", state 1875, "(1)"
- line 442, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1977, "(1)"
- line 438, "pan.___", state 2007, "(1)"
- line 442, "pan.___", state 2020, "(1)"
- line 644, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2113, "(1)"
- line 438, "pan.___", state 2143, "(1)"
- line 442, "pan.___", state 2156, "(1)"
- line 411, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2242, "(1)"
- line 438, "pan.___", state 2272, "(1)"
- line 442, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2310, "(1)"
- line 411, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2311, "else"
- line 411, "pan.___", state 2314, "(1)"
- line 415, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2324, "(1)"
- line 415, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2325, "else"
- line 415, "pan.___", state 2328, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 413, "pan.___", state 2334, "((i<1))"
- line 413, "pan.___", state 2334, "((i>=1))"
- line 420, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2342, "(1)"
- line 420, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2343, "else"
- line 420, "pan.___", state 2346, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 424, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2356, "(1)"
- line 424, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2357, "else"
- line 424, "pan.___", state 2360, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 422, "pan.___", state 2366, "((i<2))"
- line 422, "pan.___", state 2366, "((i>=2))"
- line 429, "pan.___", state 2373, "(1)"
- line 429, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 2374, "else"
- line 429, "pan.___", state 2377, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 433, "pan.___", state 2386, "(1)"
- line 433, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 2387, "else"
- line 433, "pan.___", state 2390, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 431, "pan.___", state 2396, "((i<1))"
- line 431, "pan.___", state 2396, "((i>=1))"
- line 438, "pan.___", state 2403, "(1)"
- line 438, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 2404, "else"
- line 438, "pan.___", state 2407, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 442, "pan.___", state 2416, "(1)"
- line 442, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 2417, "else"
- line 442, "pan.___", state 2420, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 440, "pan.___", state 2426, "((i<2))"
- line 440, "pan.___", state 2426, "((i>=2))"
- line 450, "pan.___", state 2430, "(1)"
- line 450, "pan.___", state 2430, "(1)"
- line 644, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2435, "(1)"
- line 272, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2486, "(1)"
- line 253, "pan.___", state 2494, "(1)"
- line 257, "pan.___", state 2506, "(1)"
- line 261, "pan.___", state 2514, "(1)"
- line 411, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2597, "(1)"
- line 433, "pan.___", state 2610, "(1)"
- line 438, "pan.___", state 2627, "(1)"
- line 442, "pan.___", state 2640, "(1)"
- line 272, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2711, "(1)"
- line 253, "pan.___", state 2719, "(1)"
- line 257, "pan.___", state 2731, "(1)"
- line 261, "pan.___", state 2739, "(1)"
- line 411, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2822, "(1)"
- line 433, "pan.___", state 2835, "(1)"
- line 438, "pan.___", state 2852, "(1)"
- line 442, "pan.___", state 2865, "(1)"
- line 411, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2951, "(1)"
- line 433, "pan.___", state 2964, "(1)"
- line 438, "pan.___", state 2981, "(1)"
- line 442, "pan.___", state 2994, "(1)"
- line 249, "pan.___", state 3027, "(1)"
- line 257, "pan.___", state 3047, "(1)"
- line 261, "pan.___", state 3055, "(1)"
- line 249, "pan.___", state 3070, "(1)"
- line 253, "pan.___", state 3078, "(1)"
- line 257, "pan.___", state 3090, "(1)"
- line 261, "pan.___", state 3098, "(1)"
- line 898, "pan.___", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 83, "(1)"
- line 433, "pan.___", state 96, "(1)"
- line 438, "pan.___", state 113, "(1)"
- line 272, "pan.___", state 149, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 158, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 225, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 243, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 257, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 276, "(1)"
- line 433, "pan.___", state 289, "(1)"
- line 438, "pan.___", state 306, "(1)"
- line 442, "pan.___", state 319, "(1)"
- line 415, "pan.___", state 356, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 374, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 388, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 420, "(1)"
- line 438, "pan.___", state 437, "(1)"
- line 442, "pan.___", state 450, "(1)"
- line 415, "pan.___", state 495, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 513, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 559, "(1)"
- line 438, "pan.___", state 576, "(1)"
- line 442, "pan.___", state 589, "(1)"
- line 415, "pan.___", state 624, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 642, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 656, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 688, "(1)"
- line 438, "pan.___", state 705, "(1)"
- line 442, "pan.___", state 718, "(1)"
- line 415, "pan.___", state 755, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 773, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 787, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 819, "(1)"
- line 438, "pan.___", state 836, "(1)"
- line 442, "pan.___", state 849, "(1)"
- line 272, "pan.___", state 899, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 908, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 921, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 946, "(1)"
- line 253, "pan.___", state 954, "(1)"
- line 257, "pan.___", state 966, "(1)"
- line 261, "pan.___", state 974, "(1)"
- line 272, "pan.___", state 994, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1003, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1018, "(1)"
- line 284, "pan.___", state 1025, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1041, "(1)"
- line 253, "pan.___", state 1049, "(1)"
- line 257, "pan.___", state 1061, "(1)"
- line 261, "pan.___", state 1069, "(1)"
- line 276, "pan.___", state 1094, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1107, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1116, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1132, "(1)"
- line 253, "pan.___", state 1140, "(1)"
- line 257, "pan.___", state 1152, "(1)"
- line 261, "pan.___", state 1160, "(1)"
- line 276, "pan.___", state 1185, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1198, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1207, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1223, "(1)"
- line 253, "pan.___", state 1231, "(1)"
- line 257, "pan.___", state 1243, "(1)"
- line 261, "pan.___", state 1251, "(1)"
- line 276, "pan.___", state 1276, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1289, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1298, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1314, "(1)"
- line 253, "pan.___", state 1322, "(1)"
- line 257, "pan.___", state 1334, "(1)"
- line 261, "pan.___", state 1342, "(1)"
- line 1237, "pan.___", state 1357, "-end-"
- (78 of 1357 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1302, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.47e+04 seconds
-pan: rate 831.51243 states/second
-pan: avg transition delay 1.3538e-06 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define READER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-depth 23: Claim reached state 9 (line 1300)
-depth 1559: Claim reached state 9 (line 1299)
-Depth= 4420 States= 1e+06 Transitions= 6.06e+08 Memory= 491.936 t= 782 R= 1e+03
-Depth= 4420 States= 2e+06 Transitions= 1.36e+09 Memory= 516.838 t= 1.76e+03 R= 1e+03
-Depth= 4477 States= 3e+06 Transitions= 1.91e+09 Memory= 542.424 t= 2.47e+03 R= 1e+03
-pan: resizing hashtable to -w22.. done
-Depth= 4770 States= 4e+06 Transitions= 2.71e+09 Memory= 598.545 t= 3.51e+03 R= 1e+03
-Depth= 4829 States= 5e+06 Transitions= 3.25e+09 Memory= 623.838 t= 4.2e+03 R= 1e+03
-Depth= 5120 States= 6e+06 Transitions= 4.02e+09 Memory= 648.838 t= 5.19e+03 R= 1e+03
-Depth= 5188 States= 7e+06 Transitions= 4.89e+09 Memory= 693.662 t= 6.32e+03 R= 1e+03
-Depth= 5188 States= 8e+06 Transitions= 5.86e+09 Memory= 742.588 t= 7.58e+03 R= 1e+03
-Depth= 5188 States= 9e+06 Transitions= 6.88e+09 Memory= 781.651 t= 8.92e+03 R= 1e+03
-pan: resizing hashtable to -w24.. done
-Depth= 5188 States= 1e+07 Transitions= 7.86e+09 Memory= 952.229 t= 1.02e+04 R= 1e+03
-Depth= 5188 States= 1.1e+07 Transitions= 8.82e+09 Memory= 991.096 t= 1.15e+04 R= 1e+03
-Depth= 5436 States= 1.2e+07 Transitions= 9.74e+09 Memory= 1031.037 t= 1.27e+04 R= 9e+02
-Depth= 5479 States= 1.3e+07 Transitions= 1.07e+10 Memory= 1074.006 t= 1.4e+04 R= 9e+02
-Depth= 5479 States= 1.4e+07 Transitions= 1.16e+10 Memory= 1117.658 t= 1.52e+04 R= 9e+02
-Depth= 5479 States= 1.5e+07 Transitions= 1.25e+10 Memory= 1160.529 t= 1.63e+04 R= 9e+02
-Depth= 5479 States= 1.6e+07 Transitions= 1.36e+10 Memory= 1208.772 t= 1.77e+04 R= 9e+02
-Depth= 5479 States= 1.7e+07 Transitions= 1.45e+10 Memory= 1253.401 t= 1.88e+04 R= 9e+02
-Depth= 5479 States= 1.8e+07 Transitions= 1.54e+10 Memory= 1278.986 t= 2.01e+04 R= 9e+02
-Depth= 5479 States= 1.9e+07 Transitions= 1.64e+10 Memory= 1333.186 t= 2.14e+04 R= 9e+02
-Depth= 5479 States= 2e+07 Transitions= 1.73e+10 Memory= 1370.979 t= 2.26e+04 R= 9e+02
-Depth= 5479 States= 2.1e+07 Transitions= 1.83e+10 Memory= 1415.998 t= 2.39e+04 R= 9e+02
-Depth= 5479 States= 2.2e+07 Transitions= 1.92e+10 Memory= 1455.940 t= 2.51e+04 R= 9e+02
-Depth= 5479 States= 2.3e+07 Transitions= 2.02e+10 Memory= 1499.397 t= 2.63e+04 R= 9e+02
-Depth= 5479 States= 2.4e+07 Transitions= 2.1e+10 Memory= 1542.951 t= 2.75e+04 R= 9e+02
-Depth= 5588 States= 2.5e+07 Transitions= 2.21e+10 Memory= 1589.533 t= 2.89e+04 R= 9e+02
-Depth= 5588 States= 2.6e+07 Transitions= 2.31e+10 Memory= 1630.647 t= 3.02e+04 R= 9e+02
-Depth= 5588 States= 2.7e+07 Transitions= 2.4e+10 Memory= 1669.123 t= 3.14e+04 R= 9e+02
-Depth= 5588 States= 2.8e+07 Transitions= 2.5e+10 Memory= 1714.533 t= 3.27e+04 R= 9e+02
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5588, errors: 0
- 13563866 states, stored (2.88596e+07 visited)
-2.5765769e+10 states, matched
-2.5794629e+10 transitions (= visited+matched)
-1.4717516e+11 atomic steps
-hash conflicts: 6.8547236e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1500.519 equivalent memory usage for states (stored*(State-vector + overhead))
- 1175.436 actual memory usage for states (compression: 78.34%)
- state-vector as stored = 63 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1760.432 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 82, "(1)"
- line 438, "pan.___", state 112, "(1)"
- line 442, "pan.___", state 125, "(1)"
- line 597, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 218, "(1)"
- line 438, "pan.___", state 248, "(1)"
- line 442, "pan.___", state 261, "(1)"
- line 411, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 347, "(1)"
- line 438, "pan.___", state 377, "(1)"
- line 442, "pan.___", state 390, "(1)"
- line 411, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 415, "(1)"
- line 411, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 416, "else"
- line 411, "pan.___", state 419, "(1)"
- line 415, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 429, "(1)"
- line 415, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 430, "else"
- line 415, "pan.___", state 433, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 415, "pan.___", state 434, "(1)"
- line 413, "pan.___", state 439, "((i<1))"
- line 413, "pan.___", state 439, "((i>=1))"
- line 420, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 447, "(1)"
- line 420, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 448, "else"
- line 420, "pan.___", state 451, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 420, "pan.___", state 452, "(1)"
- line 424, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 461, "(1)"
- line 424, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 462, "else"
- line 424, "pan.___", state 465, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 424, "pan.___", state 466, "(1)"
- line 422, "pan.___", state 471, "((i<2))"
- line 422, "pan.___", state 471, "((i>=2))"
- line 429, "pan.___", state 478, "(1)"
- line 429, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 479, "else"
- line 429, "pan.___", state 482, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 429, "pan.___", state 483, "(1)"
- line 433, "pan.___", state 491, "(1)"
- line 433, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 492, "else"
- line 433, "pan.___", state 495, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 433, "pan.___", state 496, "(1)"
- line 431, "pan.___", state 501, "((i<1))"
- line 431, "pan.___", state 501, "((i>=1))"
- line 438, "pan.___", state 508, "(1)"
- line 438, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 509, "else"
- line 438, "pan.___", state 512, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 438, "pan.___", state 513, "(1)"
- line 442, "pan.___", state 521, "(1)"
- line 442, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 522, "else"
- line 442, "pan.___", state 525, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 442, "pan.___", state 526, "(1)"
- line 440, "pan.___", state 531, "((i<2))"
- line 440, "pan.___", state 531, "((i>=2))"
- line 450, "pan.___", state 535, "(1)"
- line 450, "pan.___", state 535, "(1)"
- line 597, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 540, "(1)"
- line 272, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 555, "(1)"
- line 280, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 591, "(1)"
- line 253, "pan.___", state 599, "(1)"
- line 257, "pan.___", state 611, "(1)"
- line 261, "pan.___", state 619, "(1)"
- line 411, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 702, "(1)"
- line 433, "pan.___", state 715, "(1)"
- line 438, "pan.___", state 732, "(1)"
- line 442, "pan.___", state 745, "(1)"
- line 411, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 838, "(1)"
- line 438, "pan.___", state 868, "(1)"
- line 442, "pan.___", state 881, "(1)"
- line 411, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 904, "(1)"
- line 411, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 905, "else"
- line 411, "pan.___", state 908, "(1)"
- line 415, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 918, "(1)"
- line 415, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 919, "else"
- line 415, "pan.___", state 922, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 415, "pan.___", state 923, "(1)"
- line 413, "pan.___", state 928, "((i<1))"
- line 413, "pan.___", state 928, "((i>=1))"
- line 420, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 936, "(1)"
- line 420, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 937, "else"
- line 420, "pan.___", state 940, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 420, "pan.___", state 941, "(1)"
- line 424, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 950, "(1)"
- line 424, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 951, "else"
- line 424, "pan.___", state 954, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 424, "pan.___", state 955, "(1)"
- line 422, "pan.___", state 960, "((i<2))"
- line 422, "pan.___", state 960, "((i>=2))"
- line 429, "pan.___", state 967, "(1)"
- line 429, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 968, "else"
- line 429, "pan.___", state 971, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 429, "pan.___", state 972, "(1)"
- line 433, "pan.___", state 980, "(1)"
- line 433, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 981, "else"
- line 433, "pan.___", state 984, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 433, "pan.___", state 985, "(1)"
- line 431, "pan.___", state 990, "((i<1))"
- line 431, "pan.___", state 990, "((i>=1))"
- line 438, "pan.___", state 997, "(1)"
- line 438, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 998, "else"
- line 438, "pan.___", state 1001, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 438, "pan.___", state 1002, "(1)"
- line 442, "pan.___", state 1010, "(1)"
- line 442, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 1011, "else"
- line 442, "pan.___", state 1014, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 442, "pan.___", state 1015, "(1)"
- line 440, "pan.___", state 1020, "((i<2))"
- line 440, "pan.___", state 1020, "((i>=2))"
- line 450, "pan.___", state 1024, "(1)"
- line 450, "pan.___", state 1024, "(1)"
- line 605, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1098, "(1)"
- line 433, "pan.___", state 1111, "(1)"
- line 438, "pan.___", state 1128, "(1)"
- line 442, "pan.___", state 1141, "(1)"
- line 411, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1230, "(1)"
- line 438, "pan.___", state 1260, "(1)"
- line 442, "pan.___", state 1273, "(1)"
- line 411, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1363, "(1)"
- line 438, "pan.___", state 1393, "(1)"
- line 442, "pan.___", state 1406, "(1)"
- line 411, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1492, "(1)"
- line 438, "pan.___", state 1522, "(1)"
- line 442, "pan.___", state 1535, "(1)"
- line 272, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1605, "(1)"
- line 253, "pan.___", state 1613, "(1)"
- line 257, "pan.___", state 1625, "(1)"
- line 261, "pan.___", state 1633, "(1)"
- line 411, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1716, "(1)"
- line 433, "pan.___", state 1729, "(1)"
- line 438, "pan.___", state 1746, "(1)"
- line 442, "pan.___", state 1759, "(1)"
- line 411, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1845, "(1)"
- line 433, "pan.___", state 1858, "(1)"
- line 438, "pan.___", state 1875, "(1)"
- line 442, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 1977, "(1)"
- line 438, "pan.___", state 2007, "(1)"
- line 442, "pan.___", state 2020, "(1)"
- line 644, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2113, "(1)"
- line 438, "pan.___", state 2143, "(1)"
- line 442, "pan.___", state 2156, "(1)"
- line 411, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2242, "(1)"
- line 438, "pan.___", state 2272, "(1)"
- line 442, "pan.___", state 2285, "(1)"
- line 411, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2310, "(1)"
- line 411, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2311, "else"
- line 411, "pan.___", state 2314, "(1)"
- line 415, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2324, "(1)"
- line 415, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2325, "else"
- line 415, "pan.___", state 2328, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 415, "pan.___", state 2329, "(1)"
- line 413, "pan.___", state 2334, "((i<1))"
- line 413, "pan.___", state 2334, "((i>=1))"
- line 420, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2342, "(1)"
- line 420, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2343, "else"
- line 420, "pan.___", state 2346, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 420, "pan.___", state 2347, "(1)"
- line 424, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2356, "(1)"
- line 424, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2357, "else"
- line 424, "pan.___", state 2360, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 424, "pan.___", state 2361, "(1)"
- line 422, "pan.___", state 2366, "((i<2))"
- line 422, "pan.___", state 2366, "((i>=2))"
- line 429, "pan.___", state 2373, "(1)"
- line 429, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 429, "pan.___", state 2374, "else"
- line 429, "pan.___", state 2377, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 429, "pan.___", state 2378, "(1)"
- line 433, "pan.___", state 2386, "(1)"
- line 433, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 433, "pan.___", state 2387, "else"
- line 433, "pan.___", state 2390, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 433, "pan.___", state 2391, "(1)"
- line 431, "pan.___", state 2396, "((i<1))"
- line 431, "pan.___", state 2396, "((i>=1))"
- line 438, "pan.___", state 2403, "(1)"
- line 438, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 438, "pan.___", state 2404, "else"
- line 438, "pan.___", state 2407, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 438, "pan.___", state 2408, "(1)"
- line 442, "pan.___", state 2416, "(1)"
- line 442, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 442, "pan.___", state 2417, "else"
- line 442, "pan.___", state 2420, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 442, "pan.___", state 2421, "(1)"
- line 440, "pan.___", state 2426, "((i<2))"
- line 440, "pan.___", state 2426, "((i>=2))"
- line 450, "pan.___", state 2430, "(1)"
- line 450, "pan.___", state 2430, "(1)"
- line 644, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2435, "(1)"
- line 272, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2486, "(1)"
- line 253, "pan.___", state 2494, "(1)"
- line 257, "pan.___", state 2506, "(1)"
- line 261, "pan.___", state 2514, "(1)"
- line 411, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2597, "(1)"
- line 433, "pan.___", state 2610, "(1)"
- line 438, "pan.___", state 2627, "(1)"
- line 442, "pan.___", state 2640, "(1)"
- line 272, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2711, "(1)"
- line 253, "pan.___", state 2719, "(1)"
- line 257, "pan.___", state 2731, "(1)"
- line 261, "pan.___", state 2739, "(1)"
- line 411, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2822, "(1)"
- line 433, "pan.___", state 2835, "(1)"
- line 438, "pan.___", state 2852, "(1)"
- line 442, "pan.___", state 2865, "(1)"
- line 411, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 2951, "(1)"
- line 433, "pan.___", state 2964, "(1)"
- line 438, "pan.___", state 2981, "(1)"
- line 442, "pan.___", state 2994, "(1)"
- line 249, "pan.___", state 3027, "(1)"
- line 257, "pan.___", state 3047, "(1)"
- line 261, "pan.___", state 3055, "(1)"
- line 249, "pan.___", state 3070, "(1)"
- line 253, "pan.___", state 3078, "(1)"
- line 257, "pan.___", state 3090, "(1)"
- line 261, "pan.___", state 3098, "(1)"
- line 898, "pan.___", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 83, "(1)"
- line 433, "pan.___", state 96, "(1)"
- line 438, "pan.___", state 113, "(1)"
- line 272, "pan.___", state 149, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 158, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 225, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 243, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 257, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 429, "pan.___", state 276, "(1)"
- line 433, "pan.___", state 289, "(1)"
- line 438, "pan.___", state 306, "(1)"
- line 442, "pan.___", state 319, "(1)"
- line 415, "pan.___", state 356, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 374, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 388, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 420, "(1)"
- line 438, "pan.___", state 437, "(1)"
- line 442, "pan.___", state 450, "(1)"
- line 415, "pan.___", state 495, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 513, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 559, "(1)"
- line 438, "pan.___", state 576, "(1)"
- line 442, "pan.___", state 589, "(1)"
- line 415, "pan.___", state 624, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 642, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 656, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 688, "(1)"
- line 438, "pan.___", state 705, "(1)"
- line 442, "pan.___", state 718, "(1)"
- line 415, "pan.___", state 755, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 773, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 787, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 433, "pan.___", state 819, "(1)"
- line 438, "pan.___", state 836, "(1)"
- line 442, "pan.___", state 849, "(1)"
- line 272, "pan.___", state 904, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 913, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 928, "(1)"
- line 284, "pan.___", state 935, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 951, "(1)"
- line 253, "pan.___", state 959, "(1)"
- line 257, "pan.___", state 971, "(1)"
- line 261, "pan.___", state 979, "(1)"
- line 276, "pan.___", state 1004, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1017, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1026, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1042, "(1)"
- line 253, "pan.___", state 1050, "(1)"
- line 257, "pan.___", state 1062, "(1)"
- line 261, "pan.___", state 1070, "(1)"
- line 276, "pan.___", state 1095, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1108, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1117, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1133, "(1)"
- line 253, "pan.___", state 1141, "(1)"
- line 257, "pan.___", state 1153, "(1)"
- line 261, "pan.___", state 1161, "(1)"
- line 276, "pan.___", state 1186, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1199, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1208, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1224, "(1)"
- line 253, "pan.___", state 1232, "(1)"
- line 257, "pan.___", state 1244, "(1)"
- line 261, "pan.___", state 1252, "(1)"
- line 1237, "pan.___", state 1267, "-end-"
- (71 of 1267 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1302, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.38e+04 seconds
-pan: rate 854.75351 states/second
-pan: avg transition delay 1.3089e-06 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1296)
-depth 23: Claim reached state 9 (line 1301)
-depth 1559: Claim reached state 9 (line 1300)
-pan: acceptance cycle (at depth 6380)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 7421, errors: 1
- 55319 states, stored (173044 visited)
- 69543507 states, matched
- 69716551 transitions (= visited+matched)
-3.7666148e+08 atomic steps
-hash conflicts: 1148679 (resolved)
-
-Stats on memory usage (in Megabytes):
- 6.120 equivalent memory usage for states (stored*(State-vector + overhead))
- 5.332 actual memory usage for states (compression: 87.12%)
- state-vector as stored = 73 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 471.037 total actual memory usage
-
-unreached in proctype urcu_reader
- line 412, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 82, "(1)"
- line 439, "pan.___", state 112, "(1)"
- line 443, "pan.___", state 125, "(1)"
- line 598, "pan.___", state 146, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 412, "pan.___", state 153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 185, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 199, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 218, "(1)"
- line 439, "pan.___", state 248, "(1)"
- line 443, "pan.___", state 261, "(1)"
- line 412, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 314, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 328, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 347, "(1)"
- line 439, "pan.___", state 377, "(1)"
- line 443, "pan.___", state 390, "(1)"
- line 412, "pan.___", state 413, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 415, "(1)"
- line 412, "pan.___", state 416, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 416, "else"
- line 412, "pan.___", state 419, "(1)"
- line 416, "pan.___", state 427, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 429, "(1)"
- line 416, "pan.___", state 430, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 430, "else"
- line 416, "pan.___", state 433, "(1)"
- line 416, "pan.___", state 434, "(1)"
- line 416, "pan.___", state 434, "(1)"
- line 414, "pan.___", state 439, "((i<1))"
- line 414, "pan.___", state 439, "((i>=1))"
- line 421, "pan.___", state 445, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 447, "(1)"
- line 421, "pan.___", state 448, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 448, "else"
- line 421, "pan.___", state 451, "(1)"
- line 421, "pan.___", state 452, "(1)"
- line 421, "pan.___", state 452, "(1)"
- line 425, "pan.___", state 459, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 461, "(1)"
- line 425, "pan.___", state 462, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 462, "else"
- line 425, "pan.___", state 465, "(1)"
- line 425, "pan.___", state 466, "(1)"
- line 425, "pan.___", state 466, "(1)"
- line 423, "pan.___", state 471, "((i<2))"
- line 423, "pan.___", state 471, "((i>=2))"
- line 430, "pan.___", state 478, "(1)"
- line 430, "pan.___", state 479, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 479, "else"
- line 430, "pan.___", state 482, "(1)"
- line 430, "pan.___", state 483, "(1)"
- line 430, "pan.___", state 483, "(1)"
- line 434, "pan.___", state 491, "(1)"
- line 434, "pan.___", state 492, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 492, "else"
- line 434, "pan.___", state 495, "(1)"
- line 434, "pan.___", state 496, "(1)"
- line 434, "pan.___", state 496, "(1)"
- line 432, "pan.___", state 501, "((i<1))"
- line 432, "pan.___", state 501, "((i>=1))"
- line 439, "pan.___", state 508, "(1)"
- line 439, "pan.___", state 509, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 509, "else"
- line 439, "pan.___", state 512, "(1)"
- line 439, "pan.___", state 513, "(1)"
- line 439, "pan.___", state 513, "(1)"
- line 443, "pan.___", state 521, "(1)"
- line 443, "pan.___", state 522, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 522, "else"
- line 443, "pan.___", state 525, "(1)"
- line 443, "pan.___", state 526, "(1)"
- line 443, "pan.___", state 526, "(1)"
- line 441, "pan.___", state 531, "((i<2))"
- line 441, "pan.___", state 531, "((i>=2))"
- line 451, "pan.___", state 535, "(1)"
- line 451, "pan.___", state 535, "(1)"
- line 598, "pan.___", state 538, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 598, "pan.___", state 539, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 598, "pan.___", state 540, "(1)"
- line 273, "pan.___", state 544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 555, "(1)"
- line 281, "pan.___", state 566, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 575, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 591, "(1)"
- line 254, "pan.___", state 599, "(1)"
- line 258, "pan.___", state 611, "(1)"
- line 262, "pan.___", state 619, "(1)"
- line 412, "pan.___", state 637, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 651, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 669, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 683, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 702, "(1)"
- line 434, "pan.___", state 715, "(1)"
- line 439, "pan.___", state 732, "(1)"
- line 443, "pan.___", state 745, "(1)"
- line 412, "pan.___", state 773, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 805, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 819, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 838, "(1)"
- line 439, "pan.___", state 868, "(1)"
- line 443, "pan.___", state 881, "(1)"
- line 412, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 904, "(1)"
- line 412, "pan.___", state 905, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 905, "else"
- line 412, "pan.___", state 908, "(1)"
- line 416, "pan.___", state 916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 918, "(1)"
- line 416, "pan.___", state 919, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 919, "else"
- line 416, "pan.___", state 922, "(1)"
- line 416, "pan.___", state 923, "(1)"
- line 416, "pan.___", state 923, "(1)"
- line 414, "pan.___", state 928, "((i<1))"
- line 414, "pan.___", state 928, "((i>=1))"
- line 421, "pan.___", state 934, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 936, "(1)"
- line 421, "pan.___", state 937, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 937, "else"
- line 421, "pan.___", state 940, "(1)"
- line 421, "pan.___", state 941, "(1)"
- line 421, "pan.___", state 941, "(1)"
- line 425, "pan.___", state 948, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 950, "(1)"
- line 425, "pan.___", state 951, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 951, "else"
- line 425, "pan.___", state 954, "(1)"
- line 425, "pan.___", state 955, "(1)"
- line 425, "pan.___", state 955, "(1)"
- line 423, "pan.___", state 960, "((i<2))"
- line 423, "pan.___", state 960, "((i>=2))"
- line 430, "pan.___", state 967, "(1)"
- line 430, "pan.___", state 968, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 968, "else"
- line 430, "pan.___", state 971, "(1)"
- line 430, "pan.___", state 972, "(1)"
- line 430, "pan.___", state 972, "(1)"
- line 434, "pan.___", state 980, "(1)"
- line 434, "pan.___", state 981, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 981, "else"
- line 434, "pan.___", state 984, "(1)"
- line 434, "pan.___", state 985, "(1)"
- line 434, "pan.___", state 985, "(1)"
- line 432, "pan.___", state 990, "((i<1))"
- line 432, "pan.___", state 990, "((i>=1))"
- line 439, "pan.___", state 997, "(1)"
- line 439, "pan.___", state 998, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 998, "else"
- line 439, "pan.___", state 1001, "(1)"
- line 439, "pan.___", state 1002, "(1)"
- line 439, "pan.___", state 1002, "(1)"
- line 443, "pan.___", state 1010, "(1)"
- line 443, "pan.___", state 1011, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 1011, "else"
- line 443, "pan.___", state 1014, "(1)"
- line 443, "pan.___", state 1015, "(1)"
- line 443, "pan.___", state 1015, "(1)"
- line 441, "pan.___", state 1020, "((i<2))"
- line 441, "pan.___", state 1020, "((i>=2))"
- line 451, "pan.___", state 1024, "(1)"
- line 451, "pan.___", state 1024, "(1)"
- line 606, "pan.___", state 1028, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 412, "pan.___", state 1033, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 1047, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1065, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1079, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1098, "(1)"
- line 434, "pan.___", state 1111, "(1)"
- line 439, "pan.___", state 1128, "(1)"
- line 443, "pan.___", state 1141, "(1)"
- line 412, "pan.___", state 1165, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1197, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1211, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1230, "(1)"
- line 439, "pan.___", state 1260, "(1)"
- line 443, "pan.___", state 1273, "(1)"
- line 412, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1363, "(1)"
- line 439, "pan.___", state 1393, "(1)"
- line 443, "pan.___", state 1406, "(1)"
- line 412, "pan.___", state 1427, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1492, "(1)"
- line 439, "pan.___", state 1522, "(1)"
- line 443, "pan.___", state 1535, "(1)"
- line 273, "pan.___", state 1558, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 1580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 1589, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1605, "(1)"
- line 254, "pan.___", state 1613, "(1)"
- line 258, "pan.___", state 1625, "(1)"
- line 262, "pan.___", state 1633, "(1)"
- line 412, "pan.___", state 1651, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 1665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1716, "(1)"
- line 434, "pan.___", state 1729, "(1)"
- line 439, "pan.___", state 1746, "(1)"
- line 443, "pan.___", state 1759, "(1)"
- line 412, "pan.___", state 1780, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 1794, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1812, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1826, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1845, "(1)"
- line 434, "pan.___", state 1858, "(1)"
- line 439, "pan.___", state 1875, "(1)"
- line 443, "pan.___", state 1888, "(1)"
- line 412, "pan.___", state 1912, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1944, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1958, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1977, "(1)"
- line 439, "pan.___", state 2007, "(1)"
- line 443, "pan.___", state 2020, "(1)"
- line 645, "pan.___", state 2041, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 412, "pan.___", state 2048, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2080, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2094, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 2113, "(1)"
- line 439, "pan.___", state 2143, "(1)"
- line 443, "pan.___", state 2156, "(1)"
- line 412, "pan.___", state 2177, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2209, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 2242, "(1)"
- line 439, "pan.___", state 2272, "(1)"
- line 443, "pan.___", state 2285, "(1)"
- line 412, "pan.___", state 2308, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 2310, "(1)"
- line 412, "pan.___", state 2311, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 2311, "else"
- line 412, "pan.___", state 2314, "(1)"
- line 416, "pan.___", state 2322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2324, "(1)"
- line 416, "pan.___", state 2325, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 2325, "else"
- line 416, "pan.___", state 2328, "(1)"
- line 416, "pan.___", state 2329, "(1)"
- line 416, "pan.___", state 2329, "(1)"
- line 414, "pan.___", state 2334, "((i<1))"
- line 414, "pan.___", state 2334, "((i>=1))"
- line 421, "pan.___", state 2340, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2342, "(1)"
- line 421, "pan.___", state 2343, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 2343, "else"
- line 421, "pan.___", state 2346, "(1)"
- line 421, "pan.___", state 2347, "(1)"
- line 421, "pan.___", state 2347, "(1)"
- line 425, "pan.___", state 2354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2356, "(1)"
- line 425, "pan.___", state 2357, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 2357, "else"
- line 425, "pan.___", state 2360, "(1)"
- line 425, "pan.___", state 2361, "(1)"
- line 425, "pan.___", state 2361, "(1)"
- line 423, "pan.___", state 2366, "((i<2))"
- line 423, "pan.___", state 2366, "((i>=2))"
- line 430, "pan.___", state 2373, "(1)"
- line 430, "pan.___", state 2374, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 2374, "else"
- line 430, "pan.___", state 2377, "(1)"
- line 430, "pan.___", state 2378, "(1)"
- line 430, "pan.___", state 2378, "(1)"
- line 434, "pan.___", state 2386, "(1)"
- line 434, "pan.___", state 2387, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 2387, "else"
- line 434, "pan.___", state 2390, "(1)"
- line 434, "pan.___", state 2391, "(1)"
- line 434, "pan.___", state 2391, "(1)"
- line 432, "pan.___", state 2396, "((i<1))"
- line 432, "pan.___", state 2396, "((i>=1))"
- line 439, "pan.___", state 2403, "(1)"
- line 439, "pan.___", state 2404, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 2404, "else"
- line 439, "pan.___", state 2407, "(1)"
- line 439, "pan.___", state 2408, "(1)"
- line 439, "pan.___", state 2408, "(1)"
- line 443, "pan.___", state 2416, "(1)"
- line 443, "pan.___", state 2417, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 2417, "else"
- line 443, "pan.___", state 2420, "(1)"
- line 443, "pan.___", state 2421, "(1)"
- line 443, "pan.___", state 2421, "(1)"
- line 441, "pan.___", state 2426, "((i<2))"
- line 441, "pan.___", state 2426, "((i>=2))"
- line 451, "pan.___", state 2430, "(1)"
- line 451, "pan.___", state 2430, "(1)"
- line 645, "pan.___", state 2433, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 645, "pan.___", state 2434, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 645, "pan.___", state 2435, "(1)"
- line 273, "pan.___", state 2439, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 2461, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 2470, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2486, "(1)"
- line 254, "pan.___", state 2494, "(1)"
- line 258, "pan.___", state 2506, "(1)"
- line 262, "pan.___", state 2514, "(1)"
- line 412, "pan.___", state 2532, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2546, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2564, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2578, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 2597, "(1)"
- line 434, "pan.___", state 2610, "(1)"
- line 439, "pan.___", state 2627, "(1)"
- line 443, "pan.___", state 2640, "(1)"
- line 273, "pan.___", state 2664, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 2673, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 2686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 2695, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2711, "(1)"
- line 254, "pan.___", state 2719, "(1)"
- line 258, "pan.___", state 2731, "(1)"
- line 262, "pan.___", state 2739, "(1)"
- line 412, "pan.___", state 2757, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 2822, "(1)"
- line 434, "pan.___", state 2835, "(1)"
- line 439, "pan.___", state 2852, "(1)"
- line 443, "pan.___", state 2865, "(1)"
- line 412, "pan.___", state 2886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2918, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2932, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 2951, "(1)"
- line 434, "pan.___", state 2964, "(1)"
- line 439, "pan.___", state 2981, "(1)"
- line 443, "pan.___", state 2994, "(1)"
- line 250, "pan.___", state 3027, "(1)"
- line 258, "pan.___", state 3047, "(1)"
- line 262, "pan.___", state 3055, "(1)"
- line 250, "pan.___", state 3070, "(1)"
- line 254, "pan.___", state 3078, "(1)"
- line 258, "pan.___", state 3090, "(1)"
- line 262, "pan.___", state 3098, "(1)"
- line 899, "pan.___", state 3115, "-end-"
- (283 of 3115 states)
-unreached in proctype urcu_writer
- line 412, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 24, "(1)"
- line 416, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 38, "(1)"
- line 416, "pan.___", state 39, "(1)"
- line 416, "pan.___", state 39, "(1)"
- line 414, "pan.___", state 44, "((i<1))"
- line 414, "pan.___", state 44, "((i>=1))"
- line 421, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 56, "(1)"
- line 421, "pan.___", state 57, "(1)"
- line 421, "pan.___", state 57, "(1)"
- line 425, "pan.___", state 64, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 70, "(1)"
- line 425, "pan.___", state 71, "(1)"
- line 425, "pan.___", state 71, "(1)"
- line 423, "pan.___", state 76, "((i<2))"
- line 423, "pan.___", state 76, "((i>=2))"
- line 430, "pan.___", state 83, "(1)"
- line 430, "pan.___", state 84, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 84, "else"
- line 430, "pan.___", state 87, "(1)"
- line 430, "pan.___", state 88, "(1)"
- line 430, "pan.___", state 88, "(1)"
- line 434, "pan.___", state 96, "(1)"
- line 434, "pan.___", state 97, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 97, "else"
- line 434, "pan.___", state 100, "(1)"
- line 434, "pan.___", state 101, "(1)"
- line 434, "pan.___", state 101, "(1)"
- line 432, "pan.___", state 106, "((i<1))"
- line 432, "pan.___", state 106, "((i>=1))"
- line 439, "pan.___", state 113, "(1)"
- line 439, "pan.___", state 114, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 114, "else"
- line 439, "pan.___", state 117, "(1)"
- line 439, "pan.___", state 118, "(1)"
- line 439, "pan.___", state 118, "(1)"
- line 443, "pan.___", state 126, "(1)"
- line 443, "pan.___", state 127, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 127, "else"
- line 443, "pan.___", state 130, "(1)"
- line 443, "pan.___", state 131, "(1)"
- line 443, "pan.___", state 131, "(1)"
- line 441, "pan.___", state 136, "((i<2))"
- line 441, "pan.___", state 136, "((i>=2))"
- line 451, "pan.___", state 140, "(1)"
- line 451, "pan.___", state 140, "(1)"
- line 273, "pan.___", state 149, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 158, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 166, "((i<1))"
- line 275, "pan.___", state 166, "((i>=1))"
- line 281, "pan.___", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 1022, "pan.___", state 199, "old_data = cached_rcu_ptr.val[_pid]"
- line 412, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 217, "(1)"
- line 416, "pan.___", state 225, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 231, "(1)"
- line 416, "pan.___", state 232, "(1)"
- line 416, "pan.___", state 232, "(1)"
- line 414, "pan.___", state 237, "((i<1))"
- line 414, "pan.___", state 237, "((i>=1))"
- line 421, "pan.___", state 243, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 249, "(1)"
- line 421, "pan.___", state 250, "(1)"
- line 421, "pan.___", state 250, "(1)"
- line 425, "pan.___", state 257, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 263, "(1)"
- line 425, "pan.___", state 264, "(1)"
- line 425, "pan.___", state 264, "(1)"
- line 423, "pan.___", state 269, "((i<2))"
- line 423, "pan.___", state 269, "((i>=2))"
- line 430, "pan.___", state 276, "(1)"
- line 430, "pan.___", state 277, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 277, "else"
- line 430, "pan.___", state 280, "(1)"
- line 430, "pan.___", state 281, "(1)"
- line 430, "pan.___", state 281, "(1)"
- line 434, "pan.___", state 289, "(1)"
- line 434, "pan.___", state 290, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 290, "else"
- line 434, "pan.___", state 293, "(1)"
- line 434, "pan.___", state 294, "(1)"
- line 434, "pan.___", state 294, "(1)"
- line 432, "pan.___", state 299, "((i<1))"
- line 432, "pan.___", state 299, "((i>=1))"
- line 439, "pan.___", state 306, "(1)"
- line 439, "pan.___", state 307, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 307, "else"
- line 439, "pan.___", state 310, "(1)"
- line 439, "pan.___", state 311, "(1)"
- line 439, "pan.___", state 311, "(1)"
- line 443, "pan.___", state 319, "(1)"
- line 443, "pan.___", state 320, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 320, "else"
- line 443, "pan.___", state 323, "(1)"
- line 443, "pan.___", state 324, "(1)"
- line 443, "pan.___", state 324, "(1)"
- line 441, "pan.___", state 329, "((i<2))"
- line 441, "pan.___", state 329, "((i>=2))"
- line 451, "pan.___", state 333, "(1)"
- line 451, "pan.___", state 333, "(1)"
- line 412, "pan.___", state 344, "(1)"
- line 412, "pan.___", state 345, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 345, "else"
- line 412, "pan.___", state 348, "(1)"
- line 416, "pan.___", state 356, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 362, "(1)"
- line 416, "pan.___", state 363, "(1)"
- line 416, "pan.___", state 363, "(1)"
- line 414, "pan.___", state 368, "((i<1))"
- line 414, "pan.___", state 368, "((i>=1))"
- line 421, "pan.___", state 374, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 380, "(1)"
- line 421, "pan.___", state 381, "(1)"
- line 421, "pan.___", state 381, "(1)"
- line 425, "pan.___", state 388, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 394, "(1)"
- line 425, "pan.___", state 395, "(1)"
- line 425, "pan.___", state 395, "(1)"
- line 423, "pan.___", state 400, "((i<2))"
- line 423, "pan.___", state 400, "((i>=2))"
- line 430, "pan.___", state 407, "(1)"
- line 430, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 408, "else"
- line 430, "pan.___", state 411, "(1)"
- line 430, "pan.___", state 412, "(1)"
- line 430, "pan.___", state 412, "(1)"
- line 434, "pan.___", state 420, "(1)"
- line 434, "pan.___", state 421, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 421, "else"
- line 434, "pan.___", state 424, "(1)"
- line 434, "pan.___", state 425, "(1)"
- line 434, "pan.___", state 425, "(1)"
- line 432, "pan.___", state 430, "((i<1))"
- line 432, "pan.___", state 430, "((i>=1))"
- line 439, "pan.___", state 437, "(1)"
- line 439, "pan.___", state 438, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 438, "else"
- line 439, "pan.___", state 441, "(1)"
- line 439, "pan.___", state 442, "(1)"
- line 439, "pan.___", state 442, "(1)"
- line 443, "pan.___", state 450, "(1)"
- line 443, "pan.___", state 451, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 451, "else"
- line 443, "pan.___", state 454, "(1)"
- line 443, "pan.___", state 455, "(1)"
- line 443, "pan.___", state 455, "(1)"
- line 441, "pan.___", state 460, "((i<2))"
- line 441, "pan.___", state 460, "((i>=2))"
- line 451, "pan.___", state 464, "(1)"
- line 451, "pan.___", state 464, "(1)"
- line 412, "pan.___", state 477, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 479, "(1)"
- line 412, "pan.___", state 480, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 480, "else"
- line 412, "pan.___", state 483, "(1)"
- line 416, "pan.___", state 491, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 493, "(1)"
- line 416, "pan.___", state 494, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 494, "else"
- line 416, "pan.___", state 497, "(1)"
- line 416, "pan.___", state 498, "(1)"
- line 416, "pan.___", state 498, "(1)"
- line 414, "pan.___", state 503, "((i<1))"
- line 414, "pan.___", state 503, "((i>=1))"
- line 421, "pan.___", state 509, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 511, "(1)"
- line 421, "pan.___", state 512, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 512, "else"
- line 421, "pan.___", state 515, "(1)"
- line 421, "pan.___", state 516, "(1)"
- line 421, "pan.___", state 516, "(1)"
- line 425, "pan.___", state 523, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 525, "(1)"
- line 425, "pan.___", state 526, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 526, "else"
- line 425, "pan.___", state 529, "(1)"
- line 425, "pan.___", state 530, "(1)"
- line 425, "pan.___", state 530, "(1)"
- line 423, "pan.___", state 535, "((i<2))"
- line 423, "pan.___", state 535, "((i>=2))"
- line 430, "pan.___", state 542, "(1)"
- line 430, "pan.___", state 543, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 543, "else"
- line 430, "pan.___", state 546, "(1)"
- line 430, "pan.___", state 547, "(1)"
- line 430, "pan.___", state 547, "(1)"
- line 434, "pan.___", state 555, "(1)"
- line 434, "pan.___", state 556, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 556, "else"
- line 434, "pan.___", state 559, "(1)"
- line 434, "pan.___", state 560, "(1)"
- line 434, "pan.___", state 560, "(1)"
- line 432, "pan.___", state 565, "((i<1))"
- line 432, "pan.___", state 565, "((i>=1))"
- line 439, "pan.___", state 572, "(1)"
- line 439, "pan.___", state 573, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 573, "else"
- line 439, "pan.___", state 576, "(1)"
- line 439, "pan.___", state 577, "(1)"
- line 439, "pan.___", state 577, "(1)"
- line 443, "pan.___", state 585, "(1)"
- line 443, "pan.___", state 586, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 586, "else"
- line 443, "pan.___", state 589, "(1)"
- line 443, "pan.___", state 590, "(1)"
- line 443, "pan.___", state 590, "(1)"
- line 451, "pan.___", state 599, "(1)"
- line 451, "pan.___", state 599, "(1)"
- line 412, "pan.___", state 605, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 611, "(1)"
- line 416, "pan.___", state 619, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 625, "(1)"
- line 416, "pan.___", state 626, "(1)"
- line 416, "pan.___", state 626, "(1)"
- line 414, "pan.___", state 631, "((i<1))"
- line 414, "pan.___", state 631, "((i>=1))"
- line 421, "pan.___", state 637, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 643, "(1)"
- line 421, "pan.___", state 644, "(1)"
- line 421, "pan.___", state 644, "(1)"
- line 425, "pan.___", state 651, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 657, "(1)"
- line 425, "pan.___", state 658, "(1)"
- line 425, "pan.___", state 658, "(1)"
- line 423, "pan.___", state 663, "((i<2))"
- line 423, "pan.___", state 663, "((i>=2))"
- line 430, "pan.___", state 670, "(1)"
- line 430, "pan.___", state 671, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 671, "else"
- line 430, "pan.___", state 674, "(1)"
- line 430, "pan.___", state 675, "(1)"
- line 430, "pan.___", state 675, "(1)"
- line 434, "pan.___", state 683, "(1)"
- line 434, "pan.___", state 684, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 684, "else"
- line 434, "pan.___", state 687, "(1)"
- line 434, "pan.___", state 688, "(1)"
- line 434, "pan.___", state 688, "(1)"
- line 432, "pan.___", state 693, "((i<1))"
- line 432, "pan.___", state 693, "((i>=1))"
- line 439, "pan.___", state 700, "(1)"
- line 439, "pan.___", state 701, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 701, "else"
- line 439, "pan.___", state 704, "(1)"
- line 439, "pan.___", state 705, "(1)"
- line 439, "pan.___", state 705, "(1)"
- line 443, "pan.___", state 713, "(1)"
- line 443, "pan.___", state 714, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 714, "else"
- line 443, "pan.___", state 717, "(1)"
- line 443, "pan.___", state 718, "(1)"
- line 443, "pan.___", state 718, "(1)"
- line 451, "pan.___", state 727, "(1)"
- line 451, "pan.___", state 727, "(1)"
- line 412, "pan.___", state 734, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 740, "(1)"
- line 416, "pan.___", state 748, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 754, "(1)"
- line 416, "pan.___", state 755, "(1)"
- line 416, "pan.___", state 755, "(1)"
- line 414, "pan.___", state 760, "((i<1))"
- line 414, "pan.___", state 760, "((i>=1))"
- line 421, "pan.___", state 766, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 772, "(1)"
- line 421, "pan.___", state 773, "(1)"
- line 421, "pan.___", state 773, "(1)"
- line 425, "pan.___", state 780, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 786, "(1)"
- line 425, "pan.___", state 787, "(1)"
- line 425, "pan.___", state 787, "(1)"
- line 423, "pan.___", state 792, "((i<2))"
- line 423, "pan.___", state 792, "((i>=2))"
- line 430, "pan.___", state 799, "(1)"
- line 430, "pan.___", state 800, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 430, "pan.___", state 800, "else"
- line 430, "pan.___", state 803, "(1)"
- line 430, "pan.___", state 804, "(1)"
- line 430, "pan.___", state 804, "(1)"
- line 434, "pan.___", state 812, "(1)"
- line 434, "pan.___", state 813, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 434, "pan.___", state 813, "else"
- line 434, "pan.___", state 816, "(1)"
- line 434, "pan.___", state 817, "(1)"
- line 434, "pan.___", state 817, "(1)"
- line 432, "pan.___", state 822, "((i<1))"
- line 432, "pan.___", state 822, "((i>=1))"
- line 439, "pan.___", state 829, "(1)"
- line 439, "pan.___", state 830, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 439, "pan.___", state 830, "else"
- line 439, "pan.___", state 833, "(1)"
- line 439, "pan.___", state 834, "(1)"
- line 439, "pan.___", state 834, "(1)"
- line 443, "pan.___", state 842, "(1)"
- line 443, "pan.___", state 843, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 443, "pan.___", state 843, "else"
- line 443, "pan.___", state 846, "(1)"
- line 443, "pan.___", state 847, "(1)"
- line 443, "pan.___", state 847, "(1)"
- line 441, "pan.___", state 852, "((i<2))"
- line 441, "pan.___", state 852, "((i>=2))"
- line 451, "pan.___", state 856, "(1)"
- line 451, "pan.___", state 856, "(1)"
- line 416, "pan.___", state 879, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 897, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 911, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 434, "pan.___", state 943, "(1)"
- line 439, "pan.___", state 960, "(1)"
- line 443, "pan.___", state 973, "(1)"
- line 412, "pan.___", state 999, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 1013, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1031, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1045, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 430, "pan.___", state 1064, "(1)"
- line 434, "pan.___", state 1077, "(1)"
- line 439, "pan.___", state 1094, "(1)"
- line 443, "pan.___", state 1107, "(1)"
- line 273, "pan.___", state 1153, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 1162, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 1170, "((i<1))"
- line 275, "pan.___", state 1170, "((i>=1))"
- line 281, "pan.___", state 1177, "(1)"
- line 281, "pan.___", state 1178, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 281, "pan.___", state 1178, "else"
- line 285, "pan.___", state 1184, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1192, "((i<2))"
- line 283, "pan.___", state 1192, "((i>=2))"
- line 250, "pan.___", state 1200, "(1)"
- line 254, "pan.___", state 1208, "(1)"
- line 254, "pan.___", state 1209, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 1209, "else"
- line 252, "pan.___", state 1214, "((i<1))"
- line 252, "pan.___", state 1214, "((i>=1))"
- line 258, "pan.___", state 1220, "(1)"
- line 258, "pan.___", state 1221, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 1221, "else"
- line 262, "pan.___", state 1228, "(1)"
- line 262, "pan.___", state 1229, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 1229, "else"
- line 267, "pan.___", state 1238, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 1238, "else"
- line 277, "pan.___", state 1253, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 1266, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 1275, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1291, "(1)"
- line 254, "pan.___", state 1299, "(1)"
- line 258, "pan.___", state 1311, "(1)"
- line 262, "pan.___", state 1319, "(1)"
- line 1238, "pan.___", state 1334, "-end-"
- (242 of 1334 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1303, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 88.5 seconds
-pan: rate 1954.1954 states/second
-pan: avg transition delay 1.2701e-06 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-alpha-no-ipi'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-7374:2:4070
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-7385:2:3127
-7386:0:4533
-7387:1:3013
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-3:2:2541
-4:2:2545
-5:2:2553
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-1597:2:3321
-1598:2:3329
-1599:2:3330
-1600:2:3334
-1601:2:3335
-1602:2:3343
-1603:2:3348
-1604:2:3352
-1605:2:3353
-1606:2:3361
-1607:2:3362
-1608:2:3366
-1609:2:3367
-1610:2:3361
-1611:2:3362
-1612:2:3366
-1613:2:3367
-1614:2:3375
-1615:2:3380
-1616:2:3387
-1617:2:3388
-1618:2:3395
-1619:2:3400
-1620:2:3407
-1621:2:3408
-1622:2:3407
-1623:2:3408
-1624:2:3415
-1625:2:3425
-1626:0:4001
-1627:2:2575
-1628:0:4001
-1629:2:3431
-1630:2:3432
-1631:2:3436
-1632:2:3437
-1633:2:3445
-1634:2:3446
-1635:2:3450
-1636:2:3451
-1637:2:3459
-1638:2:3464
-1639:2:3468
-1640:2:3469
-1641:2:3477
-1642:2:3478
-1643:2:3482
-1644:2:3483
-1645:2:3477
-1646:2:3478
-1647:2:3482
-1648:2:3483
-1649:2:3491
-1650:2:3496
-1651:2:3503
-1652:2:3504
-1653:2:3511
-1654:2:3516
-1655:2:3523
-1656:2:3524
-1657:2:3523
-1658:2:3524
-1659:2:3531
-1660:0:4001
-1661:2:2575
-1662:0:4001
-1663:2:3315
-1664:2:3316
-1665:2:3320
-1666:2:3321
-1667:2:3329
-1668:2:3330
-1669:2:3334
-1670:2:3335
-1671:2:3343
-1672:2:3348
-1673:2:3352
-1674:2:3353
-1675:2:3361
-1676:2:3362
-1677:2:3366
-1678:2:3367
-1679:2:3361
-1680:2:3362
-1681:2:3366
-1682:2:3367
-1683:2:3375
-1684:2:3380
-1685:2:3387
-1686:2:3388
-1687:2:3395
-1688:2:3400
-1689:2:3407
-1690:2:3408
-1691:2:3407
-1692:2:3408
-1693:2:3415
-1694:2:3425
-1695:0:4001
-1696:2:2575
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64 -DCOLLAPSE
-#CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- #make urcu_free | tee urcu_free.log
- #make urcu_free_no_mb | tee urcu_free_no_mb.log
- #make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- #make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- #make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- #make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1294)
-Depth= 9223 States= 1e+06 Transitions= 6.87e+06 Memory= 516.350 t= 19.4 R= 5e+04
-Depth= 9223 States= 2e+06 Transitions= 1.47e+07 Memory= 563.713 t= 43.1 R= 5e+04
-Depth= 9223 States= 3e+06 Transitions= 2.46e+07 Memory= 613.127 t= 73.9 R= 4e+04
-pan: resizing hashtable to -w22.. done
-Depth= 9223 States= 4e+06 Transitions= 3.19e+07 Memory= 690.440 t= 95.5 R= 4e+04
-Depth= 9223 States= 5e+06 Transitions= 3.95e+07 Memory= 736.533 t= 118 R= 4e+04
-Depth= 9223 States= 6e+06 Transitions= 5.71e+07 Memory= 785.068 t= 174 R= 3e+04
-Depth= 9223 States= 7e+06 Transitions= 6.81e+07 Memory= 834.580 t= 209 R= 3e+04
-Depth= 9223 States= 8e+06 Transitions= 8.22e+07 Memory= 883.311 t= 254 R= 3e+04
-Depth= 9223 States= 9e+06 Transitions= 9.54e+07 Memory= 932.139 t= 296 R= 3e+04
-pan: resizing hashtable to -w24.. done
-Depth= 9223 States= 1e+07 Transitions= 1.08e+08 Memory= 1104.670 t= 338 R= 3e+04
-Depth= 9223 States= 1.1e+07 Transitions= 1.21e+08 Memory= 1155.451 t= 375 R= 3e+04
-Depth= 9223 States= 1.2e+07 Transitions= 1.3e+08 Memory= 1205.744 t= 403 R= 3e+04
-Depth= 9223 States= 1.3e+07 Transitions= 1.42e+08 Memory= 1254.572 t= 442 R= 3e+04
-Depth= 9223 States= 1.4e+07 Transitions= 1.72e+08 Memory= 1302.717 t= 539 R= 3e+04
-Depth= 9223 States= 1.5e+07 Transitions= 1.91e+08 Memory= 1354.768 t= 600 R= 3e+04
-Depth= 9223 States= 1.6e+07 Transitions= 2.08e+08 Memory= 1405.842 t= 653 R= 2e+04
-Depth= 9223 States= 1.7e+07 Transitions= 2.2e+08 Memory= 1456.818 t= 691 R= 2e+04
-Depth= 9223 States= 1.8e+07 Transitions= 2.39e+08 Memory= 1506.135 t= 751 R= 2e+04
-Depth= 9223 States= 1.9e+07 Transitions= 2.55e+08 Memory= 1556.330 t= 801 R= 2e+04
-Depth= 9223 States= 2e+07 Transitions= 2.72e+08 Memory= 1604.084 t= 856 R= 2e+04
-Depth= 9285 States= 2.1e+07 Transitions= 2.85e+08 Memory= 1650.080 t= 898 R= 2e+04
-Depth= 9324 States= 2.2e+07 Transitions= 2.99e+08 Memory= 1696.760 t= 941 R= 2e+04
-Depth= 9324 States= 2.3e+07 Transitions= 3.1e+08 Memory= 1746.369 t= 976 R= 2e+04
-Depth= 9324 States= 2.4e+07 Transitions= 3.21e+08 Memory= 1792.561 t= 1.01e+03 R= 2e+04
-Depth= 9324 States= 2.5e+07 Transitions= 3.34e+08 Memory= 1841.096 t= 1.05e+03 R= 2e+04
-Depth= 9324 States= 2.6e+07 Transitions= 3.45e+08 Memory= 1890.998 t= 1.09e+03 R= 2e+04
-Depth= 9324 States= 2.7e+07 Transitions= 3.59e+08 Memory= 1940.412 t= 1.13e+03 R= 2e+04
-Depth= 9324 States= 2.8e+07 Transitions= 3.71e+08 Memory= 1987.776 t= 1.17e+03 R= 2e+04
-Depth= 9324 States= 2.9e+07 Transitions= 3.84e+08 Memory= 2034.846 t= 1.21e+03 R= 2e+04
-Depth= 9324 States= 3e+07 Transitions= 3.96e+08 Memory= 2081.233 t= 1.25e+03 R= 2e+04
-Depth= 9324 States= 3.1e+07 Transitions= 4.09e+08 Memory= 2129.865 t= 1.29e+03 R= 2e+04
-Depth= 9324 States= 3.2e+07 Transitions= 4.19e+08 Memory= 2179.670 t= 1.32e+03 R= 2e+04
-Depth= 9324 States= 3.3e+07 Transitions= 4.3e+08 Memory= 2227.717 t= 1.36e+03 R= 2e+04
-Depth= 9324 States= 3.4e+07 Transitions= 4.44e+08 Memory= 2277.033 t= 1.4e+03 R= 2e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9324 States= 3.5e+07 Transitions= 4.6e+08 Memory= 2824.190 t= 1.46e+03 R= 2e+04
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-depth 7: Claim reached state 9 (line 1367)
-depth 131: Claim reached state 9 (line 1366)
-Depth= 108226 States= 1e+06 Transitions= 1.1e+07 Memory= 495.354 t= 32.5 R= 3e+04
-Depth= 108226 States= 2e+06 Transitions= 2.2e+07 Memory= 526.018 t= 65.8 R= 3e+04
-Depth= 108226 States= 3e+06 Transitions= 3.31e+07 Memory= 555.510 t= 99.5 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 108226 States= 4e+06 Transitions= 4.38e+07 Memory= 615.733 t= 132 R= 3e+04
-Depth= 108226 States= 5e+06 Transitions= 5.47e+07 Memory= 644.346 t= 164 R= 3e+04
-Depth= 108226 States= 6e+06 Transitions= 6.54e+07 Memory= 671.983 t= 197 R= 3e+04
-Depth= 108226 States= 7e+06 Transitions= 7.64e+07 Memory= 700.108 t= 230 R= 3e+04
-Depth= 110273 States= 8e+06 Transitions= 8.89e+07 Memory= 728.428 t= 268 R= 3e+04
-Depth= 110273 States= 9e+06 Transitions= 1.02e+08 Memory= 757.920 t= 310 R= 3e+04
-pan: resizing hashtable to -w24.. done
-Depth= 110273 States= 1e+07 Transitions= 1.14e+08 Memory= 911.408 t= 347 R= 3e+04
-Depth= 110273 States= 1.1e+07 Transitions= 1.26e+08 Memory= 939.924 t= 380 R= 3e+04
-Depth= 110273 States= 1.2e+07 Transitions= 1.37e+08 Memory= 968.440 t= 414 R= 3e+04
-Depth= 110273 States= 1.3e+07 Transitions= 1.58e+08 Memory= 996.272 t= 479 R= 3e+04
-Depth= 110273 States= 1.4e+07 Transitions= 1.69e+08 Memory= 1026.545 t= 513 R= 3e+04
-Depth= 110273 States= 1.5e+07 Transitions= 1.81e+08 Memory= 1055.451 t= 550 R= 3e+04
-Depth= 110273 States= 1.6e+07 Transitions= 1.92e+08 Memory= 1084.943 t= 583 R= 3e+04
-Depth= 110273 States= 1.7e+07 Transitions= 2.03e+08 Memory= 1114.045 t= 615 R= 3e+04
-Depth= 110273 States= 1.8e+07 Transitions= 2.14e+08 Memory= 1144.318 t= 647 R= 3e+04
-Depth= 110273 States= 1.9e+07 Transitions= 2.25e+08 Memory= 1173.420 t= 680 R= 3e+04
-Depth= 110273 States= 2e+07 Transitions= 2.36e+08 Memory= 1202.717 t= 713 R= 3e+04
-Depth= 110273 States= 2.1e+07 Transitions= 2.47e+08 Memory= 1232.404 t= 746 R= 3e+04
-Depth= 110273 States= 2.2e+07 Transitions= 2.58e+08 Memory= 1262.092 t= 778 R= 3e+04
-Depth= 110273 States= 2.3e+07 Transitions= 2.69e+08 Memory= 1290.119 t= 811 R= 3e+04
-Depth= 110273 States= 2.4e+07 Transitions= 2.82e+08 Memory= 1317.268 t= 851 R= 3e+04
-Depth= 110273 States= 2.5e+07 Transitions= 2.96e+08 Memory= 1345.783 t= 893 R= 3e+04
-Depth= 110273 States= 2.6e+07 Transitions= 3.13e+08 Memory= 1373.615 t= 948 R= 3e+04
-Depth= 110273 States= 2.7e+07 Transitions= 3.48e+08 Memory= 1403.889 t= 1.06e+03 R= 3e+04
-Depth= 110273 States= 2.8e+07 Transitions= 3.7e+08 Memory= 1434.651 t= 1.13e+03 R= 2e+04
-Depth= 110273 States= 2.9e+07 Transitions= 3.84e+08 Memory= 1464.338 t= 1.17e+03 R= 2e+04
-Depth= 110273 States= 3e+07 Transitions= 4.04e+08 Memory= 1492.365 t= 1.24e+03 R= 2e+04
-Depth= 110273 States= 3.1e+07 Transitions= 4.26e+08 Memory= 1520.490 t= 1.31e+03 R= 2e+04
-Depth= 110273 States= 3.2e+07 Transitions= 4.42e+08 Memory= 1550.080 t= 1.36e+03 R= 2e+04
-Depth= 110273 States= 3.3e+07 Transitions= 4.63e+08 Memory= 1578.791 t= 1.42e+03 R= 2e+04
-Depth= 110273 States= 3.4e+07 Transitions= 4.87e+08 Memory= 1605.842 t= 1.5e+03 R= 2e+04
-pan: resizing hashtable to -w26.. done
-Depth= 110273 States= 3.5e+07 Transitions= 5.01e+08 Memory= 2130.147 t= 1.55e+03 R= 2e+04
-Depth= 110273 States= 3.6e+07 Transitions= 5.22e+08 Memory= 2158.467 t= 1.61e+03 R= 2e+04
-Depth= 110273 States= 3.7e+07 Transitions= 5.4e+08 Memory= 2186.006 t= 1.67e+03 R= 2e+04
-Depth= 110273 States= 3.8e+07 Transitions= 5.61e+08 Memory= 2213.545 t= 1.74e+03 R= 2e+04
-Depth= 110273 States= 3.9e+07 Transitions= 5.82e+08 Memory= 2242.061 t= 1.82e+03 R= 2e+04
-Depth= 110273 States= 4e+07 Transitions= 6e+08 Memory= 2270.088 t= 1.87e+03 R= 2e+04
-Depth= 110273 States= 4.1e+07 Transitions= 6.18e+08 Memory= 2298.408 t= 1.93e+03 R= 2e+04
-Depth= 110273 States= 4.2e+07 Transitions= 6.37e+08 Memory= 2325.850 t= 1.99e+03 R= 2e+04
-Depth= 110273 States= 4.3e+07 Transitions= 6.65e+08 Memory= 2352.803 t= 2.08e+03 R= 2e+04
-Depth= 110273 States= 4.4e+07 Transitions= 6.82e+08 Memory= 2380.733 t= 2.13e+03 R= 2e+04
-Depth= 110273 States= 4.5e+07 Transitions= 6.99e+08 Memory= 2408.076 t= 2.18e+03 R= 2e+04
-Depth= 110273 States= 4.6e+07 Transitions= 7.12e+08 Memory= 2434.346 t= 2.23e+03 R= 2e+04
-Depth= 110273 States= 4.7e+07 Transitions= 7.26e+08 Memory= 2462.959 t= 2.27e+03 R= 2e+04
-Depth= 110273 States= 4.8e+07 Transitions= 7.4e+08 Memory= 2493.721 t= 2.31e+03 R= 2e+04
-Depth= 110273 States= 4.9e+07 Transitions= 7.53e+08 Memory= 2522.627 t= 2.35e+03 R= 2e+04
-Depth= 110273 States= 5e+07 Transitions= 7.66e+08 Memory= 2552.803 t= 2.39e+03 R= 2e+04
-Depth= 110273 States= 5.1e+07 Transitions= 7.77e+08 Memory= 2583.565 t= 2.42e+03 R= 2e+04
-Depth= 110273 States= 5.2e+07 Transitions= 7.9e+08 Memory= 2611.006 t= 2.46e+03 R= 2e+04
-Depth= 110273 States= 5.3e+07 Transitions= 8.16e+08 Memory= 2641.182 t= 2.54e+03 R= 2e+04
-Depth= 110273 States= 5.4e+07 Transitions= 8.52e+08 Memory= 2673.213 t= 2.66e+03 R= 2e+04
-Depth= 110273 States= 5.5e+07 Transitions= 8.93e+08 Memory= 2707.197 t= 2.79e+03 R= 2e+04
-Depth= 110273 States= 5.6e+07 Transitions= 9.4e+08 Memory= 2738.447 t= 2.94e+03 R= 2e+04
-Depth= 110273 States= 5.7e+07 Transitions= 9.81e+08 Memory= 2767.354 t= 3.08e+03 R= 2e+04
-Depth= 110273 States= 5.8e+07 Transitions= 1.01e+09 Memory= 2794.111 t= 3.16e+03 R= 2e+04
-Depth= 110273 States= 5.9e+07 Transitions= 1.02e+09 Memory= 2822.529 t= 3.21e+03 R= 2e+04
-Depth= 110273 States= 6e+07 Transitions= 1.05e+09 Memory= 2850.654 t= 3.28e+03 R= 2e+04
-Depth= 110273 States= 6.1e+07 Transitions= 1.08e+09 Memory= 2879.170 t= 3.39e+03 R= 2e+04
-Depth= 110273 States= 6.2e+07 Transitions= 1.1e+09 Memory= 2908.858 t= 3.44e+03 R= 2e+04
-Depth= 110273 States= 6.3e+07 Transitions= 1.11e+09 Memory= 2935.908 t= 3.49e+03 R= 2e+04
-Depth= 110273 States= 6.4e+07 Transitions= 1.13e+09 Memory= 2960.518 t= 3.54e+03 R= 2e+04
-Depth= 110273 States= 6.5e+07 Transitions= 1.14e+09 Memory= 2990.205 t= 3.58e+03 R= 2e+04
-Depth= 110273 States= 6.6e+07 Transitions= 1.17e+09 Memory= 3018.721 t= 3.67e+03 R= 2e+04
-Depth= 110273 States= 6.7e+07 Transitions= 1.18e+09 Memory= 3047.041 t= 3.71e+03 R= 2e+04
-Depth= 110273 States= 6.8e+07 Transitions= 1.21e+09 Memory= 3074.580 t= 3.79e+03 R= 2e+04
-Depth= 110273 States= 6.9e+07 Transitions= 1.23e+09 Memory= 3101.826 t= 3.87e+03 R= 2e+04
-Depth= 110273 States= 7e+07 Transitions= 1.27e+09 Memory= 3130.635 t= 3.98e+03 R= 2e+04
-Depth= 110273 States= 7.1e+07 Transitions= 1.29e+09 Memory= 3157.197 t= 4.06e+03 R= 2e+04
-Depth= 110273 States= 7.2e+07 Transitions= 1.32e+09 Memory= 3184.443 t= 4.16e+03 R= 2e+04
-Depth= 110273 States= 7.3e+07 Transitions= 1.34e+09 Memory= 3211.690 t= 4.24e+03 R= 2e+04
-Depth= 110273 States= 7.4e+07 Transitions= 1.37e+09 Memory= 3239.229 t= 4.32e+03 R= 2e+04
-Depth= 110273 States= 7.5e+07 Transitions= 1.38e+09 Memory= 3266.670 t= 4.38e+03 R= 2e+04
-Depth= 110273 States= 7.6e+07 Transitions= 1.41e+09 Memory= 3294.307 t= 4.46e+03 R= 2e+04
-Depth= 110273 States= 7.7e+07 Transitions= 1.44e+09 Memory= 3322.432 t= 4.55e+03 R= 2e+04
-Depth= 110273 States= 7.8e+07 Transitions= 1.46e+09 Memory= 3352.608 t= 4.62e+03 R= 2e+04
-Depth= 110273 States= 7.9e+07 Transitions= 1.47e+09 Memory= 3378.193 t= 4.66e+03 R= 2e+04
-Depth= 110273 States= 8e+07 Transitions= 1.49e+09 Memory= 3407.490 t= 4.71e+03 R= 2e+04
-Depth= 110273 States= 8.1e+07 Transitions= 1.52e+09 Memory= 3436.397 t= 4.8e+03 R= 2e+04
-Depth= 110273 States= 8.2e+07 Transitions= 1.53e+09 Memory= 3461.690 t= 4.84e+03 R= 2e+04
-Depth= 110273 States= 8.3e+07 Transitions= 1.56e+09 Memory= 3491.182 t= 4.92e+03 R= 2e+04
-Depth= 110273 States= 8.4e+07 Transitions= 1.57e+09 Memory= 3519.990 t= 4.98e+03 R= 2e+04
-Depth= 110273 States= 8.5e+07 Transitions= 1.59e+09 Memory= 3546.065 t= 5.02e+03 R= 2e+04
-Depth= 110273 States= 8.6e+07 Transitions= 1.6e+09 Memory= 3575.459 t= 5.07e+03 R= 2e+04
-Depth= 110273 States= 8.7e+07 Transitions= 1.63e+09 Memory= 3605.049 t= 5.14e+03 R= 2e+04
-Depth= 110273 States= 8.8e+07 Transitions= 1.64e+09 Memory= 3632.588 t= 5.2e+03 R= 2e+04
-Depth= 110273 States= 8.9e+07 Transitions= 1.66e+09 Memory= 3661.787 t= 5.26e+03 R= 2e+04
-Depth= 110273 States= 9e+07 Transitions= 1.68e+09 Memory= 3688.154 t= 5.3e+03 R= 2e+04
-Depth= 110273 States= 9.1e+07 Transitions= 1.7e+09 Memory= 3715.986 t= 5.36e+03 R= 2e+04
-Depth= 110273 States= 9.2e+07 Transitions= 1.71e+09 Memory= 3743.623 t= 5.41e+03 R= 2e+04
-Depth= 110273 States= 9.3e+07 Transitions= 1.73e+09 Memory= 3771.358 t= 5.46e+03 R= 2e+04
-Depth= 110273 States= 9.4e+07 Transitions= 1.75e+09 Memory= 3797.920 t= 5.53e+03 R= 2e+04
-Depth= 110273 States= 9.5e+07 Transitions= 1.77e+09 Memory= 3827.119 t= 5.6e+03 R= 2e+04
-Depth= 110273 States= 9.6e+07 Transitions= 1.79e+09 Memory= 3858.858 t= 5.64e+03 R= 2e+04
-Depth= 110273 States= 9.7e+07 Transitions= 1.8e+09 Memory= 3885.713 t= 5.7e+03 R= 2e+04
-Depth= 110273 States= 9.8e+07 Transitions= 1.82e+09 Memory= 3914.717 t= 5.75e+03 R= 2e+04
-Depth= 110273 States= 9.9e+07 Transitions= 1.84e+09 Memory= 3941.670 t= 5.81e+03 R= 2e+04
-Depth= 110273 States= 1e+08 Transitions= 1.86e+09 Memory= 3968.818 t= 5.87e+03 R= 2e+04
-Depth= 110273 States= 1.01e+08 Transitions= 1.88e+09 Memory= 3994.990 t= 5.94e+03 R= 2e+04
-Depth= 110273 States= 1.02e+08 Transitions= 1.9e+09 Memory= 4023.311 t= 6.01e+03 R= 2e+04
-Depth= 110273 States= 1.03e+08 Transitions= 1.92e+09 Memory= 4053.193 t= 6.08e+03 R= 2e+04
-Depth= 110273 States= 1.04e+08 Transitions= 1.94e+09 Memory= 4078.389 t= 6.12e+03 R= 2e+04
-Depth= 110273 States= 1.05e+08 Transitions= 1.96e+09 Memory= 4108.467 t= 6.2e+03 R= 2e+04
-Depth= 110273 States= 1.06e+08 Transitions= 1.98e+09 Memory= 4137.080 t= 6.25e+03 R= 2e+04
-Depth= 110273 States= 1.07e+08 Transitions= 1.99e+09 Memory= 4163.740 t= 6.29e+03 R= 2e+04
-Depth= 110273 States= 1.08e+08 Transitions= 2.01e+09 Memory= 4191.768 t= 6.35e+03 R= 2e+04
-Depth= 110273 States= 1.09e+08 Transitions= 2.03e+09 Memory= 4221.651 t= 6.4e+03 R= 2e+04
-Depth= 110273 States= 1.1e+08 Transitions= 2.04e+09 Memory= 4249.971 t= 6.45e+03 R= 2e+04
-Depth= 110273 States= 1.11e+08 Transitions= 2.07e+09 Memory= 4278.877 t= 6.52e+03 R= 2e+04
-Depth= 110273 States= 1.12e+08 Transitions= 2.09e+09 Memory= 4308.174 t= 6.59e+03 R= 2e+04
-Depth= 110273 States= 1.13e+08 Transitions= 2.1e+09 Memory= 4333.760 t= 6.64e+03 R= 2e+04
-Depth= 110273 States= 1.14e+08 Transitions= 2.13e+09 Memory= 4363.740 t= 6.71e+03 R= 2e+04
-Depth= 110273 States= 1.15e+08 Transitions= 2.14e+09 Memory= 4392.158 t= 6.76e+03 R= 2e+04
-Depth= 110273 States= 1.16e+08 Transitions= 2.16e+09 Memory= 4419.014 t= 6.81e+03 R= 2e+04
-Depth= 110273 States= 1.17e+08 Transitions= 2.17e+09 Memory= 4446.846 t= 6.86e+03 R= 2e+04
-Depth= 110273 States= 1.18e+08 Transitions= 2.19e+09 Memory= 4476.338 t= 6.91e+03 R= 2e+04
-Depth= 110273 States= 1.19e+08 Transitions= 2.21e+09 Memory= 4505.440 t= 6.96e+03 R= 2e+04
-Depth= 110273 States= 1.2e+08 Transitions= 2.22e+09 Memory= 4529.561 t= 7.01e+03 R= 2e+04
-Depth= 110273 States= 1.21e+08 Transitions= 2.24e+09 Memory= 4557.588 t= 7.07e+03 R= 2e+04
-Depth= 110273 States= 1.22e+08 Transitions= 2.26e+09 Memory= 4584.736 t= 7.12e+03 R= 2e+04
-Depth= 110273 States= 1.23e+08 Transitions= 2.27e+09 Memory= 4612.764 t= 7.18e+03 R= 2e+04
-Depth= 110273 States= 1.24e+08 Transitions= 2.29e+09 Memory= 4640.303 t= 7.22e+03 R= 2e+04
-Depth= 110273 States= 1.25e+08 Transitions= 2.32e+09 Memory= 4669.404 t= 7.32e+03 R= 2e+04
-Depth= 110273 States= 1.26e+08 Transitions= 2.35e+09 Memory= 4698.018 t= 7.44e+03 R= 2e+04
-Depth= 110273 States= 1.27e+08 Transitions= 2.37e+09 Memory= 4728.877 t= 7.49e+03 R= 2e+04
-Depth= 110273 States= 1.28e+08 Transitions= 2.38e+09 Memory= 4757.393 t= 7.54e+03 R= 2e+04
-Depth= 110273 States= 1.29e+08 Transitions= 2.4e+09 Memory= 4785.811 t= 7.6e+03 R= 2e+04
-Depth= 110273 States= 1.3e+08 Transitions= 2.42e+09 Memory= 4814.033 t= 7.66e+03 R= 2e+04
-Depth= 110273 States= 1.31e+08 Transitions= 2.44e+09 Memory= 4843.428 t= 7.72e+03 R= 2e+04
-Depth= 110273 States= 1.32e+08 Transitions= 2.46e+09 Memory= 4871.943 t= 7.78e+03 R= 2e+04
-Depth= 110273 States= 1.33e+08 Transitions= 2.49e+09 Memory= 4898.311 t= 7.88e+03 R= 2e+04
-Depth= 110273 States= 1.34e+08 Transitions= 2.51e+09 Memory= 4926.143 t= 7.95e+03 R= 2e+04
-Depth= 110273 States= 1.35e+08 Transitions= 2.54e+09 Memory= 4953.389 t= 8.02e+03 R= 2e+04
-pan: resizing hashtable to -w28.. done
-Depth= 110273 States= 1.36e+08 Transitions= 2.56e+09 Memory= 7001.389 t= 8.13e+03 R= 2e+04
-Depth= 110273 States= 1.37e+08 Transitions= 2.58e+09 Memory= 7001.389 t= 8.19e+03 R= 2e+04
-Depth= 110273 States= 1.38e+08 Transitions= 2.61e+09 Memory= 7018.381 t= 8.26e+03 R= 2e+04
-Depth= 110273 States= 1.39e+08 Transitions= 2.63e+09 Memory= 7045.236 t= 8.33e+03 R= 2e+04
-Depth= 110273 States= 1.4e+08 Transitions= 2.65e+09 Memory= 7073.068 t= 8.39e+03 R= 2e+04
-Depth= 110273 States= 1.41e+08 Transitions= 2.68e+09 Memory= 7100.022 t= 8.48e+03 R= 2e+04
-Depth= 110273 States= 1.42e+08 Transitions= 2.7e+09 Memory= 7128.733 t= 8.54e+03 R= 2e+04
-Depth= 110273 States= 1.43e+08 Transitions= 2.72e+09 Memory= 7155.686 t= 8.6e+03 R= 2e+04
-Depth= 110273 States= 1.44e+08 Transitions= 2.73e+09 Memory= 7181.662 t= 8.65e+03 R= 2e+04
-Depth= 110273 States= 1.45e+08 Transitions= 2.74e+09 Memory= 7209.885 t= 8.69e+03 R= 2e+04
-Depth= 110273 States= 1.46e+08 Transitions= 2.76e+09 Memory= 7239.963 t= 8.73e+03 R= 2e+04
-Depth= 110273 States= 1.47e+08 Transitions= 2.77e+09 Memory= 7269.846 t= 8.77e+03 R= 2e+04
-Depth= 110273 States= 1.48e+08 Transitions= 2.79e+09 Memory= 7299.533 t= 8.82e+03 R= 2e+04
-Depth= 110273 States= 1.49e+08 Transitions= 2.8e+09 Memory= 7327.365 t= 8.87e+03 R= 2e+04
-Depth= 110273 States= 1.5e+08 Transitions= 2.82e+09 Memory= 7356.760 t= 8.92e+03 R= 2e+04
-Depth= 110273 States= 1.51e+08 Transitions= 2.84e+09 Memory= 7384.983 t= 8.97e+03 R= 2e+04
-Depth= 110273 States= 1.52e+08 Transitions= 2.85e+09 Memory= 7412.522 t= 9.02e+03 R= 2e+04
-Depth= 110273 States= 1.53e+08 Transitions= 2.87e+09 Memory= 7440.256 t= 9.09e+03 R= 2e+04
-Depth= 110273 States= 1.54e+08 Transitions= 2.91e+09 Memory= 7471.604 t= 9.2e+03 R= 2e+04
-Depth= 110273 States= 1.55e+08 Transitions= 2.95e+09 Memory= 7506.662 t= 9.32e+03 R= 2e+04
-Depth= 110273 States= 1.56e+08 Transitions= 3e+09 Memory= 7540.744 t= 9.48e+03 R= 2e+04
-Depth= 110273 States= 1.57e+08 Transitions= 3.04e+09 Memory= 7570.041 t= 9.62e+03 R= 2e+04
-Depth= 110273 States= 1.58e+08 Transitions= 3.07e+09 Memory= 7593.772 t= 9.72e+03 R= 2e+04
-Depth= 110273 States= 1.59e+08 Transitions= 3.09e+09 Memory= 7622.580 t= 9.77e+03 R= 2e+04
-Depth= 110273 States= 1.6e+08 Transitions= 3.11e+09 Memory= 7650.315 t= 9.83e+03 R= 2e+04
-Depth= 110273 States= 1.61e+08 Transitions= 3.14e+09 Memory= 7678.733 t= 9.93e+03 R= 2e+04
-Depth= 110273 States= 1.62e+08 Transitions= 3.16e+09 Memory= 7707.639 t= 1e+04 R= 2e+04
-Depth= 110273 States= 1.63e+08 Transitions= 3.18e+09 Memory= 7735.276 t= 1.01e+04 R= 2e+04
-Depth= 110273 States= 1.64e+08 Transitions= 3.2e+09 Memory= 7761.350 t= 1.01e+04 R= 2e+04
-Depth= 110273 States= 1.65e+08 Transitions= 3.21e+09 Memory= 7787.326 t= 1.02e+04 R= 2e+04
-Depth= 110273 States= 1.66e+08 Transitions= 3.23e+09 Memory= 7817.111 t= 1.02e+04 R= 2e+04
-Depth= 110273 States= 1.67e+08 Transitions= 3.25e+09 Memory= 7844.065 t= 1.03e+04 R= 2e+04
-Depth= 110273 States= 1.68e+08 Transitions= 3.28e+09 Memory= 7871.213 t= 1.04e+04 R= 2e+04
-Depth= 110273 States= 1.69e+08 Transitions= 3.3e+09 Memory= 7898.264 t= 1.04e+04 R= 2e+04
-Depth= 110273 States= 1.7e+08 Transitions= 3.32e+09 Memory= 7925.608 t= 1.05e+04 R= 2e+04
-Depth= 110273 States= 1.71e+08 Transitions= 3.35e+09 Memory= 7952.658 t= 1.06e+04 R= 2e+04
-Depth= 110273 States= 1.72e+08 Transitions= 3.38e+09 Memory= 7981.467 t= 1.07e+04 R= 2e+04
-Depth= 110273 States= 1.73e+08 Transitions= 3.4e+09 Memory= 8009.592 t= 1.08e+04 R= 2e+04
-Depth= 110273 States= 1.74e+08 Transitions= 3.43e+09 Memory= 8036.154 t= 1.08e+04 R= 2e+04
-Depth= 110273 States= 1.75e+08 Transitions= 3.45e+09 Memory= 8063.108 t= 1.09e+04 R= 2e+04
-Depth= 110273 States= 1.76e+08 Transitions= 3.48e+09 Memory= 8091.428 t= 1.1e+04 R= 2e+04
-Depth= 110273 States= 1.77e+08 Transitions= 3.5e+09 Memory= 8119.943 t= 1.11e+04 R= 2e+04
-Depth= 110273 States= 1.78e+08 Transitions= 3.53e+09 Memory= 8148.459 t= 1.12e+04 R= 2e+04
-Depth= 110273 States= 1.79e+08 Transitions= 3.54e+09 Memory= 8176.779 t= 1.12e+04 R= 2e+04
-Depth= 110273 States= 1.8e+08 Transitions= 3.56e+09 Memory= 8202.463 t= 1.12e+04 R= 2e+04
-Depth= 110273 States= 1.81e+08 Transitions= 3.58e+09 Memory= 8232.053 t= 1.13e+04 R= 2e+04
-Depth= 110273 States= 1.82e+08 Transitions= 3.6e+09 Memory= 8260.178 t= 1.14e+04 R= 2e+04
-Depth= 110273 States= 1.83e+08 Transitions= 3.62e+09 Memory= 8288.596 t= 1.14e+04 R= 2e+04
-Depth= 110273 States= 1.84e+08 Transitions= 3.64e+09 Memory= 8317.502 t= 1.15e+04 R= 2e+04
-Depth= 110273 States= 1.85e+08 Transitions= 3.66e+09 Memory= 8342.697 t= 1.16e+04 R= 2e+04
-Depth= 110273 States= 1.86e+08 Transitions= 3.67e+09 Memory= 8371.506 t= 1.16e+04 R= 2e+04
-Depth= 110273 States= 1.87e+08 Transitions= 3.69e+09 Memory= 8400.803 t= 1.17e+04 R= 2e+04
-Depth= 110273 States= 1.88e+08 Transitions= 3.71e+09 Memory= 8428.440 t= 1.17e+04 R= 2e+04
-Depth= 110273 States= 1.89e+08 Transitions= 3.73e+09 Memory= 8458.029 t= 1.18e+04 R= 2e+04
-Depth= 110273 States= 1.9e+08 Transitions= 3.75e+09 Memory= 8484.885 t= 1.18e+04 R= 2e+04
-Depth= 110273 States= 1.91e+08 Transitions= 3.76e+09 Memory= 8512.522 t= 1.19e+04 R= 2e+04
-Depth= 110273 States= 1.92e+08 Transitions= 3.78e+09 Memory= 8540.549 t= 1.19e+04 R= 2e+04
-Depth= 110273 States= 1.93e+08 Transitions= 3.79e+09 Memory= 8567.893 t= 1.2e+04 R= 2e+04
-Depth= 110273 States= 1.94e+08 Transitions= 3.82e+09 Memory= 8595.041 t= 1.21e+04 R= 2e+04
-Depth= 110273 States= 1.95e+08 Transitions= 3.84e+09 Memory= 8626.584 t= 1.21e+04 R= 2e+04
-Depth= 110273 States= 1.96e+08 Transitions= 3.85e+09 Memory= 8655.295 t= 1.22e+04 R= 2e+04
-Depth= 110273 States= 1.97e+08 Transitions= 3.87e+09 Memory= 8683.908 t= 1.22e+04 R= 2e+04
-Depth= 110273 States= 1.98e+08 Transitions= 3.89e+09 Memory= 8711.447 t= 1.23e+04 R= 2e+04
-Depth= 110273 States= 1.99e+08 Transitions= 3.91e+09 Memory= 8738.108 t= 1.23e+04 R= 2e+04
-Depth= 110273 States= 2e+08 Transitions= 3.93e+09 Memory= 8766.818 t= 1.24e+04 R= 2e+04
-Depth= 110273 States= 2.01e+08 Transitions= 3.95e+09 Memory= 8796.701 t= 1.25e+04 R= 2e+04
-Depth= 110273 States= 2.02e+08 Transitions= 3.96e+09 Memory= 8821.897 t= 1.25e+04 R= 2e+04
-Depth= 110273 States= 2.03e+08 Transitions= 3.99e+09 Memory= 8852.072 t= 1.26e+04 R= 2e+04
-Depth= 110273 States= 2.04e+08 Transitions= 4e+09 Memory= 8880.490 t= 1.26e+04 R= 2e+04
-Depth= 110273 States= 2.05e+08 Transitions= 4.02e+09 Memory= 8907.541 t= 1.27e+04 R= 2e+04
-Depth= 110273 States= 2.06e+08 Transitions= 4.03e+09 Memory= 8935.373 t= 1.27e+04 R= 2e+04
-Depth= 110273 States= 2.07e+08 Transitions= 4.05e+09 Memory= 8965.354 t= 1.28e+04 R= 2e+04
-Depth= 110273 States= 2.08e+08 Transitions= 4.07e+09 Memory= 8993.674 t= 1.28e+04 R= 2e+04
-Depth= 110273 States= 2.09e+08 Transitions= 4.09e+09 Memory= 9022.190 t= 1.29e+04 R= 2e+04
-Depth= 110273 States= 2.1e+08 Transitions= 4.11e+09 Memory= 9052.072 t= 1.3e+04 R= 2e+04
-Depth= 110273 States= 2.11e+08 Transitions= 4.13e+09 Memory= 9077.268 t= 1.3e+04 R= 2e+04
-Depth= 110273 States= 2.12e+08 Transitions= 4.15e+09 Memory= 9107.248 t= 1.31e+04 R= 2e+04
-Depth= 110273 States= 2.13e+08 Transitions= 4.16e+09 Memory= 9135.861 t= 1.31e+04 R= 2e+04
-Depth= 110273 States= 2.14e+08 Transitions= 4.18e+09 Memory= 9162.619 t= 1.32e+04 R= 2e+04
-Depth= 110273 States= 2.15e+08 Transitions= 4.2e+09 Memory= 9190.549 t= 1.32e+04 R= 2e+04
-Depth= 110273 States= 2.16e+08 Transitions= 4.21e+09 Memory= 9220.139 t= 1.33e+04 R= 2e+04
-Depth= 110273 States= 2.17e+08 Transitions= 4.23e+09 Memory= 9248.947 t= 1.33e+04 R= 2e+04
-Depth= 110273 States= 2.18e+08 Transitions= 4.25e+09 Memory= 9273.166 t= 1.34e+04 R= 2e+04
-Depth= 110273 States= 2.19e+08 Transitions= 4.26e+09 Memory= 9301.096 t= 1.34e+04 R= 2e+04
-Depth= 110273 States= 2.2e+08 Transitions= 4.28e+09 Memory= 9329.221 t= 1.35e+04 R= 2e+04
-Depth= 110273 States= 2.21e+08 Transitions= 4.29e+09 Memory= 9356.858 t= 1.35e+04 R= 2e+04
-Depth= 110273 States= 2.22e+08 Transitions= 4.32e+09 Memory= 9384.494 t= 1.36e+04 R= 2e+04
-Depth= 110273 States= 2.23e+08 Transitions= 4.35e+09 Memory= 9414.279 t= 1.37e+04 R= 2e+04
-Depth= 110273 States= 2.24e+08 Transitions= 4.37e+09 Memory= 9445.139 t= 1.38e+04 R= 2e+04
-Depth= 110273 States= 2.25e+08 Transitions= 4.39e+09 Memory= 9473.361 t= 1.38e+04 R= 2e+04
-Depth= 110273 States= 2.26e+08 Transitions= 4.4e+09 Memory= 9502.365 t= 1.39e+04 R= 2e+04
-Depth= 110273 States= 2.27e+08 Transitions= 4.42e+09 Memory= 9530.783 t= 1.39e+04 R= 2e+04
-Depth= 110273 States= 2.28e+08 Transitions= 4.44e+09 Memory= 9559.592 t= 1.4e+04 R= 2e+04
-Depth= 110273 States= 2.29e+08 Transitions= 4.47e+09 Memory= 9586.838 t= 1.41e+04 R= 2e+04
-Depth= 110273 States= 2.3e+08 Transitions= 4.49e+09 Memory= 9612.815 t= 1.42e+04 R= 2e+04
-Depth= 110273 States= 2.31e+08 Transitions= 4.52e+09 Memory= 9639.572 t= 1.42e+04 R= 2e+04
-Depth= 110273 States= 2.32e+08 Transitions= 4.54e+09 Memory= 9666.233 t= 1.43e+04 R= 2e+04
-Depth= 110273 States= 2.33e+08 Transitions= 4.57e+09 Memory= 9692.307 t= 1.44e+04 R= 2e+04
-Depth= 110273 States= 2.34e+08 Transitions= 4.59e+09 Memory= 9718.186 t= 1.45e+04 R= 2e+04
-Depth= 110273 States= 2.35e+08 Transitions= 4.61e+09 Memory= 9746.604 t= 1.45e+04 R= 2e+04
-Depth= 110273 States= 2.36e+08 Transitions= 4.63e+09 Memory= 9772.678 t= 1.46e+04 R= 2e+04
-Depth= 110273 States= 2.37e+08 Transitions= 4.65e+09 Memory= 9799.826 t= 1.46e+04 R= 2e+04
-Depth= 110273 States= 2.38e+08 Transitions= 4.67e+09 Memory= 9826.779 t= 1.47e+04 R= 2e+04
-Depth= 110273 States= 2.39e+08 Transitions= 4.7e+09 Memory= 9853.342 t= 1.48e+04 R= 2e+04
-Depth= 110273 States= 2.4e+08 Transitions= 4.72e+09 Memory= 9879.709 t= 1.49e+04 R= 2e+04
-Depth= 110273 States= 2.41e+08 Transitions= 4.75e+09 Memory= 9906.174 t= 1.49e+04 R= 2e+04
-Depth= 110273 States= 2.42e+08 Transitions= 4.77e+09 Memory= 9934.006 t= 1.5e+04 R= 2e+04
-Depth= 110273 States= 2.43e+08 Transitions= 4.79e+09 Memory= 9960.471 t= 1.51e+04 R= 2e+04
-Depth= 110273 States= 2.44e+08 Transitions= 4.81e+09 Memory= 9987.229 t= 1.51e+04 R= 2e+04
-Depth= 110273 States= 2.45e+08 Transitions= 4.83e+09 Memory= 10014.084 t= 1.52e+04 R= 2e+04
-Depth= 110273 States= 2.46e+08 Transitions= 4.85e+09 Memory= 10040.842 t= 1.53e+04 R= 2e+04
-Depth= 110273 States= 2.47e+08 Transitions= 4.87e+09 Memory= 10067.404 t= 1.53e+04 R= 2e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 110273, errors: 0
-1.5183145e+08 states, stored (2.47605e+08 visited)
-4.6348493e+09 states, matched
-4.8824543e+09 transitions (= visited+matched)
-7.5925477e+10 atomic steps
-hash conflicts: 9.7802755e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
-16796.540 equivalent memory usage for states (stored*(State-vector + overhead))
- 7578.458 actual memory usage for states (compression: 45.12%)
- state-vector as stored = 16 byte + 36 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.290 memory lost to fragmentation
-10082.932 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 547261 4207 4043 2 2 ]
-unreached in proctype urcu_reader
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 407, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 222, "(1)"
- line 253, "pan.___", state 242, "(1)"
- line 257, "pan.___", state 250, "(1)"
- line 687, "pan.___", state 269, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 276, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 308, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 322, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 340, "(1)"
- line 253, "pan.___", state 360, "(1)"
- line 257, "pan.___", state 368, "(1)"
- line 407, "pan.___", state 387, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 419, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 433, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 451, "(1)"
- line 253, "pan.___", state 471, "(1)"
- line 257, "pan.___", state 479, "(1)"
- line 407, "pan.___", state 500, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 502, "(1)"
- line 407, "pan.___", state 503, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 503, "else"
- line 407, "pan.___", state 506, "(1)"
- line 411, "pan.___", state 514, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 516, "(1)"
- line 411, "pan.___", state 517, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 517, "else"
- line 411, "pan.___", state 520, "(1)"
- line 411, "pan.___", state 521, "(1)"
- line 411, "pan.___", state 521, "(1)"
- line 409, "pan.___", state 526, "((i<1))"
- line 409, "pan.___", state 526, "((i>=1))"
- line 416, "pan.___", state 532, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 534, "(1)"
- line 416, "pan.___", state 535, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 535, "else"
- line 416, "pan.___", state 538, "(1)"
- line 416, "pan.___", state 539, "(1)"
- line 416, "pan.___", state 539, "(1)"
- line 420, "pan.___", state 546, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 548, "(1)"
- line 420, "pan.___", state 549, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 549, "else"
- line 420, "pan.___", state 552, "(1)"
- line 420, "pan.___", state 553, "(1)"
- line 420, "pan.___", state 553, "(1)"
- line 418, "pan.___", state 558, "((i<2))"
- line 418, "pan.___", state 558, "((i>=2))"
- line 245, "pan.___", state 564, "(1)"
- line 249, "pan.___", state 572, "(1)"
- line 249, "pan.___", state 573, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 573, "else"
- line 247, "pan.___", state 578, "((i<1))"
- line 247, "pan.___", state 578, "((i>=1))"
- line 253, "pan.___", state 584, "(1)"
- line 253, "pan.___", state 585, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 585, "else"
- line 257, "pan.___", state 592, "(1)"
- line 257, "pan.___", state 593, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 593, "else"
- line 255, "pan.___", state 598, "((i<2))"
- line 255, "pan.___", state 598, "((i>=2))"
- line 262, "pan.___", state 602, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 602, "else"
- line 427, "pan.___", state 604, "(1)"
- line 427, "pan.___", state 604, "(1)"
- line 687, "pan.___", state 607, "cached_urcu_active_readers = (tmp+1)"
- line 687, "pan.___", state 608, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 687, "pan.___", state 609, "(1)"
- line 407, "pan.___", state 616, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 648, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 662, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 680, "(1)"
- line 253, "pan.___", state 700, "(1)"
- line 257, "pan.___", state 708, "(1)"
- line 407, "pan.___", state 734, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 766, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 780, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 798, "(1)"
- line 253, "pan.___", state 818, "(1)"
- line 257, "pan.___", state 826, "(1)"
- line 407, "pan.___", state 845, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 847, "(1)"
- line 407, "pan.___", state 848, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 848, "else"
- line 407, "pan.___", state 851, "(1)"
- line 411, "pan.___", state 859, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 861, "(1)"
- line 411, "pan.___", state 862, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 862, "else"
- line 411, "pan.___", state 865, "(1)"
- line 411, "pan.___", state 866, "(1)"
- line 411, "pan.___", state 866, "(1)"
- line 409, "pan.___", state 871, "((i<1))"
- line 409, "pan.___", state 871, "((i>=1))"
- line 416, "pan.___", state 877, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 879, "(1)"
- line 416, "pan.___", state 880, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 880, "else"
- line 416, "pan.___", state 883, "(1)"
- line 416, "pan.___", state 884, "(1)"
- line 416, "pan.___", state 884, "(1)"
- line 420, "pan.___", state 891, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 893, "(1)"
- line 420, "pan.___", state 894, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 894, "else"
- line 420, "pan.___", state 897, "(1)"
- line 420, "pan.___", state 898, "(1)"
- line 420, "pan.___", state 898, "(1)"
- line 418, "pan.___", state 903, "((i<2))"
- line 418, "pan.___", state 903, "((i>=2))"
- line 245, "pan.___", state 909, "(1)"
- line 249, "pan.___", state 917, "(1)"
- line 249, "pan.___", state 918, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 918, "else"
- line 247, "pan.___", state 923, "((i<1))"
- line 247, "pan.___", state 923, "((i>=1))"
- line 253, "pan.___", state 929, "(1)"
- line 253, "pan.___", state 930, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 930, "else"
- line 257, "pan.___", state 937, "(1)"
- line 257, "pan.___", state 938, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 938, "else"
- line 255, "pan.___", state 943, "((i<2))"
- line 255, "pan.___", state 943, "((i>=2))"
- line 262, "pan.___", state 947, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 947, "else"
- line 427, "pan.___", state 949, "(1)"
- line 427, "pan.___", state 949, "(1)"
- line 695, "pan.___", state 953, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 958, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 990, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1004, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1022, "(1)"
- line 253, "pan.___", state 1042, "(1)"
- line 257, "pan.___", state 1050, "(1)"
- line 407, "pan.___", state 1072, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1104, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1118, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1136, "(1)"
- line 253, "pan.___", state 1156, "(1)"
- line 257, "pan.___", state 1164, "(1)"
- line 407, "pan.___", state 1187, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1219, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1233, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1251, "(1)"
- line 253, "pan.___", state 1271, "(1)"
- line 257, "pan.___", state 1279, "(1)"
- line 407, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1330, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1344, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1362, "(1)"
- line 253, "pan.___", state 1382, "(1)"
- line 257, "pan.___", state 1390, "(1)"
- line 407, "pan.___", state 1414, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1446, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1460, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1478, "(1)"
- line 253, "pan.___", state 1498, "(1)"
- line 257, "pan.___", state 1506, "(1)"
- line 407, "pan.___", state 1525, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1557, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1571, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1589, "(1)"
- line 253, "pan.___", state 1609, "(1)"
- line 257, "pan.___", state 1617, "(1)"
- line 407, "pan.___", state 1639, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1671, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1685, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1703, "(1)"
- line 253, "pan.___", state 1723, "(1)"
- line 257, "pan.___", state 1731, "(1)"
- line 734, "pan.___", state 1750, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 1757, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1789, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1803, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1821, "(1)"
- line 253, "pan.___", state 1841, "(1)"
- line 257, "pan.___", state 1849, "(1)"
- line 407, "pan.___", state 1868, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1900, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1914, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1932, "(1)"
- line 253, "pan.___", state 1952, "(1)"
- line 257, "pan.___", state 1960, "(1)"
- line 407, "pan.___", state 1981, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 1983, "(1)"
- line 407, "pan.___", state 1984, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 1984, "else"
- line 407, "pan.___", state 1987, "(1)"
- line 411, "pan.___", state 1995, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 1997, "(1)"
- line 411, "pan.___", state 1998, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 1998, "else"
- line 411, "pan.___", state 2001, "(1)"
- line 411, "pan.___", state 2002, "(1)"
- line 411, "pan.___", state 2002, "(1)"
- line 409, "pan.___", state 2007, "((i<1))"
- line 409, "pan.___", state 2007, "((i>=1))"
- line 416, "pan.___", state 2013, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2015, "(1)"
- line 416, "pan.___", state 2016, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2016, "else"
- line 416, "pan.___", state 2019, "(1)"
- line 416, "pan.___", state 2020, "(1)"
- line 416, "pan.___", state 2020, "(1)"
- line 420, "pan.___", state 2027, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2029, "(1)"
- line 420, "pan.___", state 2030, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2030, "else"
- line 420, "pan.___", state 2033, "(1)"
- line 420, "pan.___", state 2034, "(1)"
- line 420, "pan.___", state 2034, "(1)"
- line 418, "pan.___", state 2039, "((i<2))"
- line 418, "pan.___", state 2039, "((i>=2))"
- line 245, "pan.___", state 2045, "(1)"
- line 249, "pan.___", state 2053, "(1)"
- line 249, "pan.___", state 2054, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 2054, "else"
- line 247, "pan.___", state 2059, "((i<1))"
- line 247, "pan.___", state 2059, "((i>=1))"
- line 253, "pan.___", state 2065, "(1)"
- line 253, "pan.___", state 2066, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 2066, "else"
- line 257, "pan.___", state 2073, "(1)"
- line 257, "pan.___", state 2074, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 2074, "else"
- line 255, "pan.___", state 2079, "((i<2))"
- line 255, "pan.___", state 2079, "((i>=2))"
- line 262, "pan.___", state 2083, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 2083, "else"
- line 427, "pan.___", state 2085, "(1)"
- line 427, "pan.___", state 2085, "(1)"
- line 734, "pan.___", state 2088, "cached_urcu_active_readers = (tmp+1)"
- line 734, "pan.___", state 2089, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 734, "pan.___", state 2090, "(1)"
- line 407, "pan.___", state 2097, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2129, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2143, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 2161, "(1)"
- line 253, "pan.___", state 2181, "(1)"
- line 257, "pan.___", state 2189, "(1)"
- line 407, "pan.___", state 2214, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2246, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2260, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 2278, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2306, "(1)"
- line 407, "pan.___", state 2325, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2357, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2371, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 2389, "(1)"
- line 253, "pan.___", state 2409, "(1)"
- line 257, "pan.___", state 2417, "(1)"
- line 245, "pan.___", state 2448, "(1)"
- line 253, "pan.___", state 2468, "(1)"
- line 257, "pan.___", state 2476, "(1)"
- line 245, "pan.___", state 2491, "(1)"
- line 253, "pan.___", state 2511, "(1)"
- line 257, "pan.___", state 2519, "(1)"
- line 929, "pan.___", state 2536, "-end-"
- (221 of 2536 states)
-unreached in proctype urcu_writer
- line 407, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 245, "pan.___", state 109, "(1)"
- line 249, "pan.___", state 117, "(1)"
- line 253, "pan.___", state 129, "(1)"
- line 268, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 167, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 180, "cache_dirty_rcu_ptr = 0"
- line 407, "pan.___", state 220, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 234, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 252, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 266, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 284, "(1)"
- line 249, "pan.___", state 292, "(1)"
- line 253, "pan.___", state 304, "(1)"
- line 257, "pan.___", state 312, "(1)"
- line 411, "pan.___", state 347, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 365, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 379, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 405, "(1)"
- line 253, "pan.___", state 417, "(1)"
- line 257, "pan.___", state 425, "(1)"
- line 411, "pan.___", state 468, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 486, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 500, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 526, "(1)"
- line 253, "pan.___", state 538, "(1)"
- line 257, "pan.___", state 546, "(1)"
- line 411, "pan.___", state 579, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 597, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 611, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 637, "(1)"
- line 253, "pan.___", state 649, "(1)"
- line 257, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 692, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 710, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 724, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 750, "(1)"
- line 253, "pan.___", state 762, "(1)"
- line 257, "pan.___", state 770, "(1)"
- line 268, "pan.___", state 818, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 827, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 840, "cache_dirty_rcu_ptr = 0"
- line 245, "pan.___", state 865, "(1)"
- line 249, "pan.___", state 873, "(1)"
- line 253, "pan.___", state 885, "(1)"
- line 257, "pan.___", state 893, "(1)"
- line 268, "pan.___", state 924, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 933, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 946, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 955, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 971, "(1)"
- line 249, "pan.___", state 979, "(1)"
- line 253, "pan.___", state 991, "(1)"
- line 257, "pan.___", state 999, "(1)"
- line 268, "pan.___", state 1020, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1029, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1044, "(1)"
- line 280, "pan.___", state 1051, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1067, "(1)"
- line 249, "pan.___", state 1075, "(1)"
- line 253, "pan.___", state 1087, "(1)"
- line 257, "pan.___", state 1095, "(1)"
- line 268, "pan.___", state 1126, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1135, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1148, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1157, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1173, "(1)"
- line 249, "pan.___", state 1181, "(1)"
- line 253, "pan.___", state 1193, "(1)"
- line 257, "pan.___", state 1201, "(1)"
- line 272, "pan.___", state 1227, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1240, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1249, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1265, "(1)"
- line 249, "pan.___", state 1273, "(1)"
- line 253, "pan.___", state 1285, "(1)"
- line 257, "pan.___", state 1293, "(1)"
- line 268, "pan.___", state 1324, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1333, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1346, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1355, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1371, "(1)"
- line 249, "pan.___", state 1379, "(1)"
- line 253, "pan.___", state 1391, "(1)"
- line 257, "pan.___", state 1399, "(1)"
- line 272, "pan.___", state 1425, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1438, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1447, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1463, "(1)"
- line 249, "pan.___", state 1471, "(1)"
- line 253, "pan.___", state 1483, "(1)"
- line 257, "pan.___", state 1491, "(1)"
- line 268, "pan.___", state 1522, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1531, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1544, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1553, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1569, "(1)"
- line 249, "pan.___", state 1577, "(1)"
- line 253, "pan.___", state 1589, "(1)"
- line 257, "pan.___", state 1597, "(1)"
- line 272, "pan.___", state 1623, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1636, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1645, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1661, "(1)"
- line 249, "pan.___", state 1669, "(1)"
- line 253, "pan.___", state 1681, "(1)"
- line 257, "pan.___", state 1689, "(1)"
- line 268, "pan.___", state 1720, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1729, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1742, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1751, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1767, "(1)"
- line 249, "pan.___", state 1775, "(1)"
- line 253, "pan.___", state 1787, "(1)"
- line 257, "pan.___", state 1795, "(1)"
- line 1304, "pan.___", state 1811, "-end-"
- (118 of 1811 states)
-unreached in proctype :init:
- (0 of 28 states)
-unreached in proctype :never:
- line 1369, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 1.54e+04 seconds
-pan: rate 16109.46 states/second
-pan: avg transition delay 3.148e-06 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
+++ /dev/null
-#define READER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1362)
-depth 7: Claim reached state 9 (line 1367)
-depth 50: Claim reached state 9 (line 1366)
-Depth= 7070 States= 1e+06 Transitions= 1.16e+07 Memory= 493.010 t= 34.5 R= 3e+04
-Depth= 7070 States= 2e+06 Transitions= 2.31e+07 Memory= 521.330 t= 69.3 R= 3e+04
-Depth= 7070 States= 3e+06 Transitions= 3.43e+07 Memory= 549.455 t= 103 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 8814 States= 4e+06 Transitions= 4.57e+07 Memory= 607.041 t= 138 R= 3e+04
-Depth= 8814 States= 5e+06 Transitions= 5.73e+07 Memory= 632.920 t= 174 R= 3e+04
-Depth= 8814 States= 6e+06 Transitions= 7.04e+07 Memory= 662.217 t= 215 R= 3e+04
-Depth= 8814 States= 7e+06 Transitions= 8.38e+07 Memory= 690.049 t= 257 R= 3e+04
-Depth= 8814 States= 8e+06 Transitions= 9.59e+07 Memory= 717.588 t= 294 R= 3e+04
-Depth= 8814 States= 9e+06 Transitions= 1.08e+08 Memory= 745.127 t= 332 R= 3e+04
-pan: resizing hashtable to -w24.. done
-Depth= 8814 States= 1e+07 Transitions= 1.29e+08 Memory= 897.639 t= 398 R= 3e+04
-Depth= 8814 States= 1.1e+07 Transitions= 1.41e+08 Memory= 926.154 t= 434 R= 3e+04
-Depth= 8814 States= 1.2e+07 Transitions= 1.53e+08 Memory= 953.401 t= 471 R= 3e+04
-Depth= 8814 States= 1.3e+07 Transitions= 1.64e+08 Memory= 980.940 t= 505 R= 3e+04
-Depth= 8814 States= 1.4e+07 Transitions= 1.75e+08 Memory= 1010.725 t= 539 R= 3e+04
-Depth= 8814 States= 1.5e+07 Transitions= 1.87e+08 Memory= 1037.580 t= 573 R= 3e+04
-Depth= 8814 States= 1.6e+07 Transitions= 1.98e+08 Memory= 1064.924 t= 607 R= 3e+04
-Depth= 8814 States= 1.7e+07 Transitions= 2.09e+08 Memory= 1094.904 t= 641 R= 3e+04
-Depth= 8814 States= 1.8e+07 Transitions= 2.23e+08 Memory= 1119.514 t= 683 R= 3e+04
-Depth= 8814 States= 1.9e+07 Transitions= 2.36e+08 Memory= 1146.662 t= 725 R= 3e+04
-Depth= 8814 States= 2e+07 Transitions= 2.57e+08 Memory= 1174.201 t= 790 R= 3e+04
-Depth= 8814 States= 2.1e+07 Transitions= 2.93e+08 Memory= 1205.549 t= 908 R= 2e+04
-Depth= 9015 States= 2.2e+07 Transitions= 3.11e+08 Memory= 1235.822 t= 965 R= 2e+04
-Depth= 9015 States= 2.3e+07 Transitions= 3.25e+08 Memory= 1264.533 t= 1.01e+03 R= 2e+04
-Depth= 9015 States= 2.4e+07 Transitions= 3.45e+08 Memory= 1293.244 t= 1.07e+03 R= 2e+04
-Depth= 9015 States= 2.5e+07 Transitions= 3.67e+08 Memory= 1321.467 t= 1.14e+03 R= 2e+04
-Depth= 9015 States= 2.6e+07 Transitions= 3.84e+08 Memory= 1350.764 t= 1.2e+03 R= 2e+04
-Depth= 9015 States= 2.7e+07 Transitions= 4.07e+08 Memory= 1380.158 t= 1.27e+03 R= 2e+04
-Depth= 9015 States= 2.8e+07 Transitions= 4.29e+08 Memory= 1405.940 t= 1.34e+03 R= 2e+04
-Depth= 9015 States= 2.9e+07 Transitions= 4.48e+08 Memory= 1433.381 t= 1.4e+03 R= 2e+04
-Depth= 9015 States= 3e+07 Transitions= 4.66e+08 Memory= 1461.506 t= 1.46e+03 R= 2e+04
-Depth= 9015 States= 3.1e+07 Transitions= 4.86e+08 Memory= 1489.143 t= 1.52e+03 R= 2e+04
-Depth= 9015 States= 3.2e+07 Transitions= 5.1e+08 Memory= 1516.486 t= 1.6e+03 R= 2e+04
-Depth= 9015 States= 3.3e+07 Transitions= 5.29e+08 Memory= 1543.733 t= 1.66e+03 R= 2e+04
-Depth= 9015 States= 3.4e+07 Transitions= 5.47e+08 Memory= 1571.760 t= 1.72e+03 R= 2e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9015 States= 3.5e+07 Transitions= 5.69e+08 Memory= 2095.088 t= 1.79e+03 R= 2e+04
-Depth= 9015 States= 3.6e+07 Transitions= 5.95e+08 Memory= 2122.041 t= 1.87e+03 R= 2e+04
-Depth= 9015 States= 3.7e+07 Transitions= 6.12e+08 Memory= 2149.971 t= 1.93e+03 R= 2e+04
-Depth= 9015 States= 3.8e+07 Transitions= 6.29e+08 Memory= 2176.045 t= 1.98e+03 R= 2e+04
-Depth= 9015 States= 3.9e+07 Transitions= 6.42e+08 Memory= 2204.268 t= 2.02e+03 R= 2e+04
-Depth= 9015 States= 4e+07 Transitions= 6.56e+08 Memory= 2233.565 t= 2.06e+03 R= 2e+04
-Depth= 9015 States= 4.1e+07 Transitions= 6.69e+08 Memory= 2264.424 t= 2.1e+03 R= 2e+04
-Depth= 9015 States= 4.2e+07 Transitions= 6.82e+08 Memory= 2292.940 t= 2.14e+03 R= 2e+04
-Depth= 9015 States= 4.3e+07 Transitions= 6.95e+08 Memory= 2322.529 t= 2.18e+03 R= 2e+04
-Depth= 9015 States= 4.4e+07 Transitions= 7.07e+08 Memory= 2350.654 t= 2.22e+03 R= 2e+04
-Depth= 9015 States= 4.5e+07 Transitions= 7.28e+08 Memory= 2378.193 t= 2.29e+03 R= 2e+04
-Depth= 9015 States= 4.6e+07 Transitions= 7.63e+08 Memory= 2409.443 t= 2.4e+03 R= 2e+04
-Depth= 9015 States= 4.7e+07 Transitions= 7.99e+08 Memory= 2445.088 t= 2.52e+03 R= 2e+04
-Depth= 9015 States= 4.8e+07 Transitions= 8.49e+08 Memory= 2479.072 t= 2.69e+03 R= 2e+04
-Depth= 9015 States= 4.9e+07 Transitions= 8.91e+08 Memory= 2508.076 t= 2.82e+03 R= 2e+04
-Depth= 9015 States= 5e+07 Transitions= 9.24e+08 Memory= 2532.295 t= 2.93e+03 R= 2e+04
-Depth= 9015 States= 5.1e+07 Transitions= 9.39e+08 Memory= 2561.494 t= 2.98e+03 R= 2e+04
-Depth= 9015 States= 5.2e+07 Transitions= 9.6e+08 Memory= 2589.522 t= 3.05e+03 R= 2e+04
-Depth= 9015 States= 5.3e+07 Transitions= 9.99e+08 Memory= 2617.158 t= 3.17e+03 R= 2e+04
-Depth= 9015 States= 5.4e+07 Transitions= 1.01e+09 Memory= 2647.725 t= 3.22e+03 R= 2e+04
-Depth= 9015 States= 5.5e+07 Transitions= 1.03e+09 Memory= 2674.580 t= 3.27e+03 R= 2e+04
-Depth= 9015 States= 5.6e+07 Transitions= 1.05e+09 Memory= 2701.143 t= 3.32e+03 R= 2e+04
-Depth= 9015 States= 5.7e+07 Transitions= 1.06e+09 Memory= 2730.928 t= 3.36e+03 R= 2e+04
-Depth= 9015 States= 5.8e+07 Transitions= 1.09e+09 Memory= 2759.053 t= 3.45e+03 R= 2e+04
-Depth= 9015 States= 5.9e+07 Transitions= 1.1e+09 Memory= 2786.983 t= 3.5e+03 R= 2e+04
-Depth= 9015 States= 6e+07 Transitions= 1.13e+09 Memory= 2814.619 t= 3.6e+03 R= 2e+04
-Depth= 9015 States= 6.1e+07 Transitions= 1.15e+09 Memory= 2841.670 t= 3.66e+03 R= 2e+04
-Depth= 9015 States= 6.2e+07 Transitions= 1.19e+09 Memory= 2870.576 t= 3.77e+03 R= 2e+04
-Depth= 9015 States= 6.3e+07 Transitions= 1.21e+09 Memory= 2897.627 t= 3.84e+03 R= 2e+04
-Depth= 9015 States= 6.4e+07 Transitions= 1.24e+09 Memory= 2925.166 t= 3.94e+03 R= 2e+04
-Depth= 9015 States= 6.5e+07 Transitions= 1.26e+09 Memory= 2952.803 t= 4.01e+03 R= 2e+04
-Depth= 9015 States= 6.6e+07 Transitions= 1.28e+09 Memory= 2979.756 t= 4.09e+03 R= 2e+04
-Depth= 9015 States= 6.7e+07 Transitions= 1.3e+09 Memory= 3007.686 t= 4.15e+03 R= 2e+04
-Depth= 9015 States= 6.8e+07 Transitions= 1.33e+09 Memory= 3035.811 t= 4.23e+03 R= 2e+04
-Depth= 9015 States= 6.9e+07 Transitions= 1.36e+09 Memory= 3063.838 t= 4.32e+03 R= 2e+04
-Depth= 9522 States= 7e+07 Transitions= 1.38e+09 Memory= 3094.795 t= 4.39e+03 R= 2e+04
-Depth= 9522 States= 7.1e+07 Transitions= 1.39e+09 Memory= 3120.186 t= 4.43e+03 R= 2e+04
-Depth= 9522 States= 7.2e+07 Transitions= 1.41e+09 Memory= 3149.971 t= 4.5e+03 R= 2e+04
-Depth= 9553 States= 7.3e+07 Transitions= 1.44e+09 Memory= 3179.365 t= 4.57e+03 R= 2e+04
-Depth= 9553 States= 7.4e+07 Transitions= 1.45e+09 Memory= 3205.244 t= 4.61e+03 R= 2e+04
-Depth= 9553 States= 7.5e+07 Transitions= 1.47e+09 Memory= 3235.225 t= 4.69e+03 R= 2e+04
-Depth= 9553 States= 7.6e+07 Transitions= 1.49e+09 Memory= 3263.545 t= 4.75e+03 R= 2e+04
-Depth= 9553 States= 7.7e+07 Transitions= 1.51e+09 Memory= 3290.401 t= 4.8e+03 R= 2e+04
-Depth= 9553 States= 7.8e+07 Transitions= 1.52e+09 Memory= 3319.795 t= 4.84e+03 R= 2e+04
-Depth= 9553 States= 7.9e+07 Transitions= 1.54e+09 Memory= 3349.190 t= 4.91e+03 R= 2e+04
-Depth= 9553 States= 8e+07 Transitions= 1.56e+09 Memory= 3377.803 t= 4.98e+03 R= 2e+04
-Depth= 9553 States= 8.1e+07 Transitions= 1.58e+09 Memory= 3406.904 t= 5.04e+03 R= 2e+04
-Depth= 9553 States= 8.2e+07 Transitions= 1.6e+09 Memory= 3434.443 t= 5.08e+03 R= 2e+04
-Depth= 9553 States= 8.3e+07 Transitions= 1.61e+09 Memory= 3462.178 t= 5.14e+03 R= 2e+04
-Depth= 9553 States= 8.4e+07 Transitions= 1.63e+09 Memory= 3490.205 t= 5.18e+03 R= 2e+04
-Depth= 9553 States= 8.5e+07 Transitions= 1.65e+09 Memory= 3517.549 t= 5.24e+03 R= 2e+04
-Depth= 9553 States= 8.6e+07 Transitions= 1.67e+09 Memory= 3544.502 t= 5.31e+03 R= 2e+04
-Depth= 9553 States= 8.7e+07 Transitions= 1.69e+09 Memory= 3574.190 t= 5.38e+03 R= 2e+04
-Depth= 9553 States= 8.8e+07 Transitions= 1.7e+09 Memory= 3606.026 t= 5.42e+03 R= 2e+04
-Depth= 9553 States= 8.9e+07 Transitions= 1.72e+09 Memory= 3632.588 t= 5.48e+03 R= 2e+04
-Depth= 9553 States= 9e+07 Transitions= 1.74e+09 Memory= 3662.080 t= 5.53e+03 R= 2e+04
-Depth= 9553 States= 9.1e+07 Transitions= 1.76e+09 Memory= 3689.229 t= 5.59e+03 R= 2e+04
-Depth= 9553 States= 9.2e+07 Transitions= 1.78e+09 Memory= 3716.572 t= 5.65e+03 R= 2e+04
-Depth= 9553 States= 9.3e+07 Transitions= 1.8e+09 Memory= 3743.135 t= 5.72e+03 R= 2e+04
-Depth= 9553 States= 9.4e+07 Transitions= 1.82e+09 Memory= 3771.553 t= 5.8e+03 R= 2e+04
-Depth= 9553 States= 9.5e+07 Transitions= 1.84e+09 Memory= 3801.436 t= 5.86e+03 R= 2e+04
-Depth= 9553 States= 9.6e+07 Transitions= 1.86e+09 Memory= 3827.803 t= 5.91e+03 R= 2e+04
-Depth= 9553 States= 9.7e+07 Transitions= 1.88e+09 Memory= 3857.881 t= 5.99e+03 R= 2e+04
-Depth= 9553 States= 9.8e+07 Transitions= 1.9e+09 Memory= 3886.494 t= 6.03e+03 R= 2e+04
-Depth= 9553 States= 9.9e+07 Transitions= 1.91e+09 Memory= 3914.229 t= 6.08e+03 R= 2e+04
-Depth= 9553 States= 1e+08 Transitions= 1.93e+09 Memory= 3942.549 t= 6.13e+03 R= 2e+04
-Depth= 9553 States= 1.01e+08 Transitions= 1.94e+09 Memory= 3972.236 t= 6.19e+03 R= 2e+04
-Depth= 9553 States= 1.02e+08 Transitions= 1.96e+09 Memory= 4001.729 t= 6.24e+03 R= 2e+04
-Depth= 9553 States= 1.03e+08 Transitions= 1.98e+09 Memory= 4030.049 t= 6.3e+03 R= 2e+04
-Depth= 9553 States= 1.04e+08 Transitions= 2e+09 Memory= 4059.639 t= 6.38e+03 R= 2e+04
-Depth= 9553 States= 1.05e+08 Transitions= 2.02e+09 Memory= 4086.006 t= 6.43e+03 R= 2e+04
-Depth= 9553 States= 1.06e+08 Transitions= 2.04e+09 Memory= 4115.889 t= 6.49e+03 R= 2e+04
-Depth= 9553 States= 1.07e+08 Transitions= 2.06e+09 Memory= 4144.990 t= 6.55e+03 R= 2e+04
-Depth= 9553 States= 1.08e+08 Transitions= 2.07e+09 Memory= 4172.822 t= 6.6e+03 R= 2e+04
-Depth= 9553 States= 1.09e+08 Transitions= 2.09e+09 Memory= 4200.752 t= 6.65e+03 R= 2e+04
-Depth= 9553 States= 1.1e+08 Transitions= 2.11e+09 Memory= 4230.147 t= 6.7e+03 R= 2e+04
-Depth= 9553 States= 1.11e+08 Transitions= 2.12e+09 Memory= 4259.932 t= 6.75e+03 R= 2e+04
-Depth= 9553 States= 1.12e+08 Transitions= 2.14e+09 Memory= 4284.541 t= 6.81e+03 R= 2e+04
-Depth= 9553 States= 1.13e+08 Transitions= 2.16e+09 Memory= 4312.471 t= 6.86e+03 R= 2e+04
-Depth= 9553 States= 1.14e+08 Transitions= 2.17e+09 Memory= 4340.401 t= 6.91e+03 R= 2e+04
-Depth= 9553 States= 1.15e+08 Transitions= 2.19e+09 Memory= 4368.526 t= 6.97e+03 R= 2e+04
-Depth= 9553 States= 1.16e+08 Transitions= 2.21e+09 Memory= 4396.651 t= 7.02e+03 R= 2e+04
-Depth= 9553 States= 1.17e+08 Transitions= 2.23e+09 Memory= 4423.897 t= 7.1e+03 R= 2e+04
-Depth= 9553 States= 1.18e+08 Transitions= 2.27e+09 Memory= 4453.779 t= 7.22e+03 R= 2e+04
-Depth= 9553 States= 1.19e+08 Transitions= 2.29e+09 Memory= 4483.955 t= 7.29e+03 R= 2e+04
-Depth= 9553 States= 1.2e+08 Transitions= 2.3e+09 Memory= 4513.545 t= 7.33e+03 R= 2e+04
-Depth= 9553 States= 1.21e+08 Transitions= 2.32e+09 Memory= 4541.279 t= 7.4e+03 R= 2e+04
-Depth= 9553 States= 1.22e+08 Transitions= 2.34e+09 Memory= 4569.893 t= 7.45e+03 R= 2e+04
-Depth= 9553 States= 1.23e+08 Transitions= 2.36e+09 Memory= 4599.483 t= 7.52e+03 R= 2e+04
-Depth= 9553 States= 1.24e+08 Transitions= 2.38e+09 Memory= 4627.705 t= 7.58e+03 R= 2e+04
-Depth= 9553 States= 1.25e+08 Transitions= 2.41e+09 Memory= 4654.658 t= 7.68e+03 R= 2e+04
-Depth= 9553 States= 1.26e+08 Transitions= 2.43e+09 Memory= 4681.807 t= 7.76e+03 R= 2e+04
-Depth= 9553 States= 1.27e+08 Transitions= 2.45e+09 Memory= 4708.760 t= 7.83e+03 R= 2e+04
-Depth= 9553 States= 1.28e+08 Transitions= 2.48e+09 Memory= 4735.518 t= 7.93e+03 R= 2e+04
-Depth= 9553 States= 1.29e+08 Transitions= 2.5e+09 Memory= 4762.178 t= 8e+03 R= 2e+04
-Depth= 9553 States= 1.3e+08 Transitions= 2.52e+09 Memory= 4790.303 t= 8.07e+03 R= 2e+04
-Depth= 9553 States= 1.31e+08 Transitions= 2.55e+09 Memory= 4817.451 t= 8.15e+03 R= 2e+04
-Depth= 9553 States= 1.32e+08 Transitions= 2.57e+09 Memory= 4845.186 t= 8.22e+03 R= 2e+04
-Depth= 9553 States= 1.33e+08 Transitions= 2.59e+09 Memory= 4872.139 t= 8.3e+03 R= 2e+04
-Depth= 9553 States= 1.34e+08 Transitions= 2.61e+09 Memory= 4900.850 t= 8.37e+03 R= 2e+04
-Depth= 9553 States= 1.35e+08 Transitions= 2.63e+09 Memory= 4927.803 t= 8.43e+03 R= 2e+04
-pan: resizing hashtable to -w28.. done
-Depth= 9553 States= 1.36e+08 Transitions= 2.65e+09 Memory= 6975.803 t= 8.5e+03 R= 2e+04
-Depth= 9553 States= 1.37e+08 Transitions= 2.66e+09 Memory= 6975.803 t= 8.54e+03 R= 2e+04
-Depth= 9553 States= 1.38e+08 Transitions= 2.67e+09 Memory= 6996.799 t= 8.58e+03 R= 2e+04
-Depth= 9553 States= 1.39e+08 Transitions= 2.69e+09 Memory= 7026.779 t= 8.62e+03 R= 2e+04
-Depth= 9553 States= 1.4e+08 Transitions= 2.7e+09 Memory= 7056.467 t= 8.68e+03 R= 2e+04
-Depth= 9553 States= 1.41e+08 Transitions= 2.72e+09 Memory= 7084.787 t= 8.72e+03 R= 2e+04
-Depth= 9553 States= 1.42e+08 Transitions= 2.74e+09 Memory= 7114.084 t= 8.77e+03 R= 2e+04
-Depth= 9553 States= 1.43e+08 Transitions= 2.75e+09 Memory= 7143.088 t= 8.82e+03 R= 2e+04
-Depth= 9553 States= 1.44e+08 Transitions= 2.77e+09 Memory= 7170.920 t= 8.88e+03 R= 2e+04
-Depth= 9553 States= 1.45e+08 Transitions= 2.79e+09 Memory= 7198.166 t= 8.94e+03 R= 2e+04
-Depth= 9553 States= 1.46e+08 Transitions= 2.82e+09 Memory= 7229.514 t= 9.06e+03 R= 2e+04
-Depth= 9553 States= 1.47e+08 Transitions= 2.86e+09 Memory= 7265.158 t= 9.18e+03 R= 2e+04
-Depth= 9553 States= 1.48e+08 Transitions= 2.91e+09 Memory= 7299.143 t= 9.34e+03 R= 2e+04
-Depth= 9553 States= 1.49e+08 Transitions= 2.95e+09 Memory= 7327.170 t= 9.47e+03 R= 2e+04
-Depth= 9553 States= 1.5e+08 Transitions= 2.99e+09 Memory= 7352.561 t= 9.59e+03 R= 2e+04
-Depth= 9553 States= 1.51e+08 Transitions= 3e+09 Memory= 7380.881 t= 9.64e+03 R= 2e+04
-Depth= 9553 States= 1.52e+08 Transitions= 3.02e+09 Memory= 7408.908 t= 9.7e+03 R= 2e+04
-Depth= 9553 States= 1.53e+08 Transitions= 3.05e+09 Memory= 7437.033 t= 9.8e+03 R= 2e+04
-Depth= 9553 States= 1.54e+08 Transitions= 3.08e+09 Memory= 7465.744 t= 9.89e+03 R= 2e+04
-Depth= 9553 States= 1.55e+08 Transitions= 3.1e+09 Memory= 7493.869 t= 9.95e+03 R= 2e+04
-Depth= 9553 States= 1.56e+08 Transitions= 3.11e+09 Memory= 7520.529 t= 9.99e+03 R= 2e+04
-Depth= 9553 States= 1.57e+08 Transitions= 3.13e+09 Memory= 7547.092 t= 1e+04 R= 2e+04
-Depth= 9553 States= 1.58e+08 Transitions= 3.14e+09 Memory= 7577.170 t= 1.01e+04 R= 2e+04
-Depth= 9553 States= 1.59e+08 Transitions= 3.17e+09 Memory= 7604.611 t= 1.02e+04 R= 2e+04
-Depth= 9553 States= 1.6e+08 Transitions= 3.19e+09 Memory= 7631.955 t= 1.02e+04 R= 2e+04
-Depth= 9553 States= 1.61e+08 Transitions= 3.21e+09 Memory= 7659.299 t= 1.03e+04 R= 2e+04
-Depth= 9553 States= 1.62e+08 Transitions= 3.24e+09 Memory= 7686.740 t= 1.04e+04 R= 2e+04
-Depth= 9553 States= 1.63e+08 Transitions= 3.27e+09 Memory= 7713.791 t= 1.05e+04 R= 2e+04
-Depth= 9553 States= 1.64e+08 Transitions= 3.29e+09 Memory= 7743.186 t= 1.06e+04 R= 2e+04
-Depth= 9553 States= 1.65e+08 Transitions= 3.31e+09 Memory= 7771.604 t= 1.06e+04 R= 2e+04
-Depth= 9553 States= 1.66e+08 Transitions= 3.34e+09 Memory= 7797.971 t= 1.07e+04 R= 2e+04
-Depth= 9553 States= 1.67e+08 Transitions= 3.37e+09 Memory= 7825.217 t= 1.08e+04 R= 2e+04
-Depth= 9553 States= 1.68e+08 Transitions= 3.39e+09 Memory= 7853.733 t= 1.09e+04 R= 2e+04
-Depth= 9553 States= 1.69e+08 Transitions= 3.41e+09 Memory= 7880.686 t= 1.09e+04 R= 2e+04
-Depth= 9553 States= 1.7e+08 Transitions= 3.44e+09 Memory= 7909.690 t= 1.1e+04 R= 2e+04
-Depth= 9553 States= 1.71e+08 Transitions= 3.46e+09 Memory= 7939.279 t= 1.11e+04 R= 2e+04
-Depth= 9553 States= 1.72e+08 Transitions= 3.47e+09 Memory= 7964.768 t= 1.11e+04 R= 2e+04
-Depth= 9553 States= 1.73e+08 Transitions= 3.5e+09 Memory= 7994.260 t= 1.12e+04 R= 2e+04
-Depth= 9553 States= 1.74e+08 Transitions= 3.52e+09 Memory= 8023.850 t= 1.13e+04 R= 2e+04
-Depth= 9553 States= 1.75e+08 Transitions= 3.53e+09 Memory= 8051.877 t= 1.13e+04 R= 2e+04
-Depth= 9553 States= 1.76e+08 Transitions= 3.56e+09 Memory= 8080.979 t= 1.14e+04 R= 2e+04
-Depth= 9553 States= 1.77e+08 Transitions= 3.57e+09 Memory= 8107.834 t= 1.15e+04 R= 2e+04
-Depth= 9553 States= 1.78e+08 Transitions= 3.59e+09 Memory= 8137.033 t= 1.15e+04 R= 2e+04
-Depth= 9553 States= 1.79e+08 Transitions= 3.61e+09 Memory= 8165.158 t= 1.16e+04 R= 2e+04
-Depth= 9553 States= 1.8e+08 Transitions= 3.63e+09 Memory= 8194.065 t= 1.16e+04 R= 2e+04
-Depth= 9553 States= 1.81e+08 Transitions= 3.65e+09 Memory= 8222.971 t= 1.17e+04 R= 2e+04
-Depth= 9553 States= 1.82e+08 Transitions= 3.66e+09 Memory= 8251.096 t= 1.17e+04 R= 2e+04
-Depth= 9553 States= 1.83e+08 Transitions= 3.68e+09 Memory= 8279.514 t= 1.18e+04 R= 2e+04
-Depth= 9553 States= 1.84e+08 Transitions= 3.69e+09 Memory= 8307.151 t= 1.18e+04 R= 2e+04
-Depth= 9553 States= 1.85e+08 Transitions= 3.71e+09 Memory= 8334.787 t= 1.19e+04 R= 2e+04
-Depth= 9553 States= 1.86e+08 Transitions= 3.73e+09 Memory= 8361.838 t= 1.2e+04 R= 2e+04
-Depth= 9553 States= 1.87e+08 Transitions= 3.75e+09 Memory= 8392.209 t= 1.2e+04 R= 2e+04
-Depth= 9553 States= 1.88e+08 Transitions= 3.77e+09 Memory= 8423.361 t= 1.21e+04 R= 2e+04
-Depth= 9553 States= 1.89e+08 Transitions= 3.78e+09 Memory= 8449.826 t= 1.21e+04 R= 2e+04
-Depth= 9553 States= 1.9e+08 Transitions= 3.8e+09 Memory= 8479.026 t= 1.22e+04 R= 2e+04
-Depth= 9553 States= 1.91e+08 Transitions= 3.82e+09 Memory= 8506.076 t= 1.22e+04 R= 2e+04
-Depth= 9553 States= 1.92e+08 Transitions= 3.84e+09 Memory= 8533.029 t= 1.23e+04 R= 2e+04
-Depth= 9553 States= 1.93e+08 Transitions= 3.86e+09 Memory= 8563.889 t= 1.24e+04 R= 2e+04
-Depth= 9553 States= 1.94e+08 Transitions= 3.88e+09 Memory= 8590.744 t= 1.24e+04 R= 2e+04
-Depth= 9553 States= 1.95e+08 Transitions= 3.9e+09 Memory= 8620.334 t= 1.25e+04 R= 2e+04
-Depth= 9553 States= 1.96e+08 Transitions= 3.92e+09 Memory= 8649.826 t= 1.25e+04 R= 2e+04
-Depth= 9553 States= 1.97e+08 Transitions= 3.93e+09 Memory= 8676.486 t= 1.26e+04 R= 2e+04
-Depth= 9553 States= 1.98e+08 Transitions= 3.95e+09 Memory= 8705.197 t= 1.26e+04 R= 2e+04
-Depth= 9553 States= 1.99e+08 Transitions= 3.96e+09 Memory= 8734.006 t= 1.27e+04 R= 2e+04
-Depth= 9553 States= 2e+08 Transitions= 3.98e+09 Memory= 8764.279 t= 1.27e+04 R= 2e+04
-Depth= 9553 States= 2.01e+08 Transitions= 4e+09 Memory= 8792.209 t= 1.28e+04 R= 2e+04
-Depth= 9553 States= 2.02e+08 Transitions= 4.03e+09 Memory= 8821.408 t= 1.29e+04 R= 2e+04
-Depth= 9553 States= 2.03e+08 Transitions= 4.04e+09 Memory= 8849.338 t= 1.29e+04 R= 2e+04
-Depth= 9553 States= 2.04e+08 Transitions= 4.06e+09 Memory= 8878.733 t= 1.3e+04 R= 2e+04
-Depth= 9553 States= 2.05e+08 Transitions= 4.08e+09 Memory= 8908.322 t= 1.31e+04 R= 2e+04
-Depth= 9553 States= 2.06e+08 Transitions= 4.09e+09 Memory= 8934.494 t= 1.31e+04 R= 2e+04
-Depth= 9553 States= 2.07e+08 Transitions= 4.11e+09 Memory= 8963.498 t= 1.32e+04 R= 2e+04
-Depth= 9553 States= 2.08e+08 Transitions= 4.13e+09 Memory= 8991.818 t= 1.32e+04 R= 2e+04
-Depth= 9553 States= 2.09e+08 Transitions= 4.14e+09 Memory= 9022.287 t= 1.33e+04 R= 2e+04
-Depth= 9553 States= 2.1e+08 Transitions= 4.16e+09 Memory= 9047.580 t= 1.33e+04 R= 2e+04
-Depth= 9553 States= 2.11e+08 Transitions= 4.18e+09 Memory= 9075.412 t= 1.34e+04 R= 2e+04
-Depth= 9553 States= 2.12e+08 Transitions= 4.19e+09 Memory= 9103.244 t= 1.34e+04 R= 2e+04
-Depth= 9553 States= 2.13e+08 Transitions= 4.21e+09 Memory= 9131.467 t= 1.35e+04 R= 2e+04
-Depth= 9553 States= 2.14e+08 Transitions= 4.22e+09 Memory= 9159.006 t= 1.35e+04 R= 2e+04
-Depth= 9553 States= 2.15e+08 Transitions= 4.26e+09 Memory= 9188.010 t= 1.36e+04 R= 2e+04
-Depth= 9553 States= 2.16e+08 Transitions= 4.29e+09 Memory= 9218.283 t= 1.37e+04 R= 2e+04
-Depth= 9553 States= 2.17e+08 Transitions= 4.3e+09 Memory= 9246.897 t= 1.37e+04 R= 2e+04
-Depth= 9553 States= 2.18e+08 Transitions= 4.32e+09 Memory= 9276.193 t= 1.38e+04 R= 2e+04
-Depth= 9553 States= 2.19e+08 Transitions= 4.33e+09 Memory= 9305.002 t= 1.39e+04 R= 2e+04
-Depth= 9553 States= 2.2e+08 Transitions= 4.35e+09 Memory= 9334.299 t= 1.39e+04 R= 2e+04
-Depth= 9553 States= 2.21e+08 Transitions= 4.37e+09 Memory= 9362.619 t= 1.4e+04 R= 2e+04
-Depth= 9553 States= 2.22e+08 Transitions= 4.4e+09 Memory= 9388.108 t= 1.41e+04 R= 2e+04
-Depth= 9553 States= 2.23e+08 Transitions= 4.43e+09 Memory= 9415.354 t= 1.42e+04 R= 2e+04
-Depth= 9553 States= 2.24e+08 Transitions= 4.45e+09 Memory= 9442.111 t= 1.42e+04 R= 2e+04
-Depth= 9553 States= 2.25e+08 Transitions= 4.48e+09 Memory= 9468.967 t= 1.43e+04 R= 2e+04
-Depth= 9553 States= 2.26e+08 Transitions= 4.5e+09 Memory= 9495.041 t= 1.44e+04 R= 2e+04
-Depth= 9553 States= 2.27e+08 Transitions= 4.52e+09 Memory= 9522.580 t= 1.44e+04 R= 2e+04
-Depth= 9553 States= 2.28e+08 Transitions= 4.54e+09 Memory= 9549.631 t= 1.45e+04 R= 2e+04
-Depth= 9553 States= 2.29e+08 Transitions= 4.56e+09 Memory= 9576.096 t= 1.46e+04 R= 2e+04
-Depth= 9553 States= 2.3e+08 Transitions= 4.59e+09 Memory= 9602.268 t= 1.47e+04 R= 2e+04
-Depth= 9553 States= 2.31e+08 Transitions= 4.6e+09 Memory= 9630.197 t= 1.47e+04 R= 2e+04
-Depth= 9553 States= 2.32e+08 Transitions= 4.63e+09 Memory= 9656.858 t= 1.48e+04 R= 2e+04
-Depth= 9553 States= 2.33e+08 Transitions= 4.66e+09 Memory= 9683.713 t= 1.49e+04 R= 2e+04
-Depth= 9553 States= 2.34e+08 Transitions= 4.68e+09 Memory= 9710.373 t= 1.5e+04 R= 2e+04
-Depth= 9553 States= 2.35e+08 Transitions= 4.7e+09 Memory= 9738.108 t= 1.5e+04 R= 2e+04
-Depth= 9553 States= 2.36e+08 Transitions= 4.72e+09 Memory= 9765.158 t= 1.51e+04 R= 2e+04
-Depth= 9553 States= 2.37e+08 Transitions= 4.74e+09 Memory= 9792.404 t= 1.52e+04 R= 2e+04
-Depth= 9553 States= 2.38e+08 Transitions= 4.77e+09 Memory= 9818.576 t= 1.52e+04 R= 2e+04
-Depth= 9553 States= 2.39e+08 Transitions= 4.79e+09 Memory= 9845.432 t= 1.53e+04 R= 2e+04
-Depth= 9553 States= 2.4e+08 Transitions= 4.8e+09 Memory= 9871.701 t= 1.53e+04 R= 2e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 9553, errors: 0
-1.4728139e+08 states, stored (2.40187e+08 visited)
-4.565323e+09 states, matched
-4.8055096e+09 transitions (= visited+matched)
-7.4787137e+10 atomic steps
-hash conflicts: 1.0275497e+09 (resolved)
-
-Stats on memory usage (in Megabytes):
-16293.183 equivalent memory usage for states (stored*(State-vector + overhead))
- 7372.383 actual memory usage for states (compression: 45.25%)
- state-vector as stored = 16 byte + 36 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.367 memory lost to fragmentation
- 9876.779 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 592075 4097 3828 2 2 ]
-unreached in proctype urcu_reader
- line 268, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 276, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 104, "(1)"
- line 249, "pan.___", state 112, "(1)"
- line 253, "pan.___", state 124, "(1)"
- line 257, "pan.___", state 132, "(1)"
- line 407, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 222, "(1)"
- line 253, "pan.___", state 242, "(1)"
- line 257, "pan.___", state 250, "(1)"
- line 687, "pan.___", state 269, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 407, "pan.___", state 276, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 308, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 322, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 340, "(1)"
- line 253, "pan.___", state 360, "(1)"
- line 257, "pan.___", state 368, "(1)"
- line 407, "pan.___", state 387, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 419, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 433, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 451, "(1)"
- line 253, "pan.___", state 471, "(1)"
- line 257, "pan.___", state 479, "(1)"
- line 407, "pan.___", state 500, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 502, "(1)"
- line 407, "pan.___", state 503, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 503, "else"
- line 407, "pan.___", state 506, "(1)"
- line 411, "pan.___", state 514, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 516, "(1)"
- line 411, "pan.___", state 517, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 517, "else"
- line 411, "pan.___", state 520, "(1)"
- line 411, "pan.___", state 521, "(1)"
- line 411, "pan.___", state 521, "(1)"
- line 409, "pan.___", state 526, "((i<1))"
- line 409, "pan.___", state 526, "((i>=1))"
- line 416, "pan.___", state 532, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 534, "(1)"
- line 416, "pan.___", state 535, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 535, "else"
- line 416, "pan.___", state 538, "(1)"
- line 416, "pan.___", state 539, "(1)"
- line 416, "pan.___", state 539, "(1)"
- line 420, "pan.___", state 546, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 548, "(1)"
- line 420, "pan.___", state 549, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 549, "else"
- line 420, "pan.___", state 552, "(1)"
- line 420, "pan.___", state 553, "(1)"
- line 420, "pan.___", state 553, "(1)"
- line 418, "pan.___", state 558, "((i<2))"
- line 418, "pan.___", state 558, "((i>=2))"
- line 245, "pan.___", state 564, "(1)"
- line 249, "pan.___", state 572, "(1)"
- line 249, "pan.___", state 573, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 573, "else"
- line 247, "pan.___", state 578, "((i<1))"
- line 247, "pan.___", state 578, "((i>=1))"
- line 253, "pan.___", state 584, "(1)"
- line 253, "pan.___", state 585, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 585, "else"
- line 257, "pan.___", state 592, "(1)"
- line 257, "pan.___", state 593, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 593, "else"
- line 255, "pan.___", state 598, "((i<2))"
- line 255, "pan.___", state 598, "((i>=2))"
- line 262, "pan.___", state 602, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 602, "else"
- line 427, "pan.___", state 604, "(1)"
- line 427, "pan.___", state 604, "(1)"
- line 687, "pan.___", state 607, "cached_urcu_active_readers = (tmp+1)"
- line 687, "pan.___", state 608, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 687, "pan.___", state 609, "(1)"
- line 407, "pan.___", state 616, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 648, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 662, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 680, "(1)"
- line 253, "pan.___", state 700, "(1)"
- line 257, "pan.___", state 708, "(1)"
- line 407, "pan.___", state 734, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 766, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 780, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 798, "(1)"
- line 253, "pan.___", state 818, "(1)"
- line 257, "pan.___", state 826, "(1)"
- line 407, "pan.___", state 845, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 847, "(1)"
- line 407, "pan.___", state 848, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 848, "else"
- line 407, "pan.___", state 851, "(1)"
- line 411, "pan.___", state 859, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 861, "(1)"
- line 411, "pan.___", state 862, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 862, "else"
- line 411, "pan.___", state 865, "(1)"
- line 411, "pan.___", state 866, "(1)"
- line 411, "pan.___", state 866, "(1)"
- line 409, "pan.___", state 871, "((i<1))"
- line 409, "pan.___", state 871, "((i>=1))"
- line 416, "pan.___", state 877, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 879, "(1)"
- line 416, "pan.___", state 880, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 880, "else"
- line 416, "pan.___", state 883, "(1)"
- line 416, "pan.___", state 884, "(1)"
- line 416, "pan.___", state 884, "(1)"
- line 420, "pan.___", state 891, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 893, "(1)"
- line 420, "pan.___", state 894, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 894, "else"
- line 420, "pan.___", state 897, "(1)"
- line 420, "pan.___", state 898, "(1)"
- line 420, "pan.___", state 898, "(1)"
- line 418, "pan.___", state 903, "((i<2))"
- line 418, "pan.___", state 903, "((i>=2))"
- line 245, "pan.___", state 909, "(1)"
- line 249, "pan.___", state 917, "(1)"
- line 249, "pan.___", state 918, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 918, "else"
- line 247, "pan.___", state 923, "((i<1))"
- line 247, "pan.___", state 923, "((i>=1))"
- line 253, "pan.___", state 929, "(1)"
- line 253, "pan.___", state 930, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 930, "else"
- line 257, "pan.___", state 937, "(1)"
- line 257, "pan.___", state 938, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 938, "else"
- line 255, "pan.___", state 943, "((i<2))"
- line 255, "pan.___", state 943, "((i>=2))"
- line 262, "pan.___", state 947, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 947, "else"
- line 427, "pan.___", state 949, "(1)"
- line 427, "pan.___", state 949, "(1)"
- line 695, "pan.___", state 953, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 407, "pan.___", state 958, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 990, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1004, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1022, "(1)"
- line 253, "pan.___", state 1042, "(1)"
- line 257, "pan.___", state 1050, "(1)"
- line 407, "pan.___", state 1072, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1104, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1118, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1136, "(1)"
- line 253, "pan.___", state 1156, "(1)"
- line 257, "pan.___", state 1164, "(1)"
- line 407, "pan.___", state 1187, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1219, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1233, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1251, "(1)"
- line 253, "pan.___", state 1271, "(1)"
- line 257, "pan.___", state 1279, "(1)"
- line 407, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1330, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1344, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1362, "(1)"
- line 253, "pan.___", state 1382, "(1)"
- line 257, "pan.___", state 1390, "(1)"
- line 407, "pan.___", state 1414, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1446, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1460, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1478, "(1)"
- line 253, "pan.___", state 1498, "(1)"
- line 257, "pan.___", state 1506, "(1)"
- line 407, "pan.___", state 1525, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1557, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1571, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1589, "(1)"
- line 253, "pan.___", state 1609, "(1)"
- line 257, "pan.___", state 1617, "(1)"
- line 407, "pan.___", state 1639, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1671, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1685, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1703, "(1)"
- line 253, "pan.___", state 1723, "(1)"
- line 257, "pan.___", state 1731, "(1)"
- line 734, "pan.___", state 1750, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 407, "pan.___", state 1757, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1789, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1803, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1821, "(1)"
- line 253, "pan.___", state 1841, "(1)"
- line 257, "pan.___", state 1849, "(1)"
- line 407, "pan.___", state 1868, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 1900, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 1914, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1932, "(1)"
- line 253, "pan.___", state 1952, "(1)"
- line 257, "pan.___", state 1960, "(1)"
- line 407, "pan.___", state 1981, "cache_dirty_urcu_gp_ctr = 0"
- line 407, "pan.___", state 1983, "(1)"
- line 407, "pan.___", state 1984, "(cache_dirty_urcu_gp_ctr)"
- line 407, "pan.___", state 1984, "else"
- line 407, "pan.___", state 1987, "(1)"
- line 411, "pan.___", state 1995, "cache_dirty_urcu_active_readers = 0"
- line 411, "pan.___", state 1997, "(1)"
- line 411, "pan.___", state 1998, "(cache_dirty_urcu_active_readers)"
- line 411, "pan.___", state 1998, "else"
- line 411, "pan.___", state 2001, "(1)"
- line 411, "pan.___", state 2002, "(1)"
- line 411, "pan.___", state 2002, "(1)"
- line 409, "pan.___", state 2007, "((i<1))"
- line 409, "pan.___", state 2007, "((i>=1))"
- line 416, "pan.___", state 2013, "cache_dirty_rcu_ptr = 0"
- line 416, "pan.___", state 2015, "(1)"
- line 416, "pan.___", state 2016, "(cache_dirty_rcu_ptr)"
- line 416, "pan.___", state 2016, "else"
- line 416, "pan.___", state 2019, "(1)"
- line 416, "pan.___", state 2020, "(1)"
- line 416, "pan.___", state 2020, "(1)"
- line 420, "pan.___", state 2027, "cache_dirty_rcu_data[i] = 0"
- line 420, "pan.___", state 2029, "(1)"
- line 420, "pan.___", state 2030, "(cache_dirty_rcu_data[i])"
- line 420, "pan.___", state 2030, "else"
- line 420, "pan.___", state 2033, "(1)"
- line 420, "pan.___", state 2034, "(1)"
- line 420, "pan.___", state 2034, "(1)"
- line 418, "pan.___", state 2039, "((i<2))"
- line 418, "pan.___", state 2039, "((i>=2))"
- line 245, "pan.___", state 2045, "(1)"
- line 249, "pan.___", state 2053, "(1)"
- line 249, "pan.___", state 2054, "(!(cache_dirty_urcu_active_readers))"
- line 249, "pan.___", state 2054, "else"
- line 247, "pan.___", state 2059, "((i<1))"
- line 247, "pan.___", state 2059, "((i>=1))"
- line 253, "pan.___", state 2065, "(1)"
- line 253, "pan.___", state 2066, "(!(cache_dirty_rcu_ptr))"
- line 253, "pan.___", state 2066, "else"
- line 257, "pan.___", state 2073, "(1)"
- line 257, "pan.___", state 2074, "(!(cache_dirty_rcu_data[i]))"
- line 257, "pan.___", state 2074, "else"
- line 255, "pan.___", state 2079, "((i<2))"
- line 255, "pan.___", state 2079, "((i>=2))"
- line 262, "pan.___", state 2083, "(!(cache_dirty_urcu_gp_ctr))"
- line 262, "pan.___", state 2083, "else"
- line 427, "pan.___", state 2085, "(1)"
- line 427, "pan.___", state 2085, "(1)"
- line 734, "pan.___", state 2088, "cached_urcu_active_readers = (tmp+1)"
- line 734, "pan.___", state 2089, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 734, "pan.___", state 2090, "(1)"
- line 407, "pan.___", state 2097, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2129, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2143, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 2161, "(1)"
- line 253, "pan.___", state 2181, "(1)"
- line 257, "pan.___", state 2189, "(1)"
- line 407, "pan.___", state 2214, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2246, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2260, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 2278, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2306, "(1)"
- line 407, "pan.___", state 2325, "cache_dirty_urcu_gp_ctr = 0"
- line 416, "pan.___", state 2357, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 2371, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 2389, "(1)"
- line 253, "pan.___", state 2409, "(1)"
- line 257, "pan.___", state 2417, "(1)"
- line 245, "pan.___", state 2448, "(1)"
- line 253, "pan.___", state 2468, "(1)"
- line 257, "pan.___", state 2476, "(1)"
- line 245, "pan.___", state 2491, "(1)"
- line 253, "pan.___", state 2511, "(1)"
- line 257, "pan.___", state 2519, "(1)"
- line 929, "pan.___", state 2536, "-end-"
- (221 of 2536 states)
-unreached in proctype urcu_writer
- line 407, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 245, "pan.___", state 109, "(1)"
- line 249, "pan.___", state 117, "(1)"
- line 253, "pan.___", state 129, "(1)"
- line 268, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 167, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 180, "cache_dirty_rcu_ptr = 0"
- line 407, "pan.___", state 220, "cache_dirty_urcu_gp_ctr = 0"
- line 411, "pan.___", state 234, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 252, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 266, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 284, "(1)"
- line 249, "pan.___", state 292, "(1)"
- line 253, "pan.___", state 304, "(1)"
- line 257, "pan.___", state 312, "(1)"
- line 411, "pan.___", state 347, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 365, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 379, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 405, "(1)"
- line 253, "pan.___", state 417, "(1)"
- line 257, "pan.___", state 425, "(1)"
- line 411, "pan.___", state 468, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 486, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 500, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 526, "(1)"
- line 253, "pan.___", state 538, "(1)"
- line 257, "pan.___", state 546, "(1)"
- line 411, "pan.___", state 579, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 597, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 611, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 637, "(1)"
- line 253, "pan.___", state 649, "(1)"
- line 257, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 692, "cache_dirty_urcu_active_readers = 0"
- line 416, "pan.___", state 710, "cache_dirty_rcu_ptr = 0"
- line 420, "pan.___", state 724, "cache_dirty_rcu_data[i] = 0"
- line 249, "pan.___", state 750, "(1)"
- line 253, "pan.___", state 762, "(1)"
- line 257, "pan.___", state 770, "(1)"
- line 268, "pan.___", state 823, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 832, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 847, "(1)"
- line 280, "pan.___", state 854, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 870, "(1)"
- line 249, "pan.___", state 878, "(1)"
- line 253, "pan.___", state 890, "(1)"
- line 257, "pan.___", state 898, "(1)"
- line 268, "pan.___", state 929, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 938, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 951, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 960, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 976, "(1)"
- line 249, "pan.___", state 984, "(1)"
- line 253, "pan.___", state 996, "(1)"
- line 257, "pan.___", state 1004, "(1)"
- line 272, "pan.___", state 1030, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1043, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1052, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1068, "(1)"
- line 249, "pan.___", state 1076, "(1)"
- line 253, "pan.___", state 1088, "(1)"
- line 257, "pan.___", state 1096, "(1)"
- line 268, "pan.___", state 1127, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1136, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1149, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1158, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1174, "(1)"
- line 249, "pan.___", state 1182, "(1)"
- line 253, "pan.___", state 1194, "(1)"
- line 257, "pan.___", state 1202, "(1)"
- line 272, "pan.___", state 1228, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1241, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1250, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1266, "(1)"
- line 249, "pan.___", state 1274, "(1)"
- line 253, "pan.___", state 1286, "(1)"
- line 257, "pan.___", state 1294, "(1)"
- line 268, "pan.___", state 1325, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1334, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1347, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1356, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1372, "(1)"
- line 249, "pan.___", state 1380, "(1)"
- line 253, "pan.___", state 1392, "(1)"
- line 257, "pan.___", state 1400, "(1)"
- line 272, "pan.___", state 1426, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1439, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1448, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1464, "(1)"
- line 249, "pan.___", state 1472, "(1)"
- line 253, "pan.___", state 1484, "(1)"
- line 257, "pan.___", state 1492, "(1)"
- line 268, "pan.___", state 1523, "cache_dirty_urcu_gp_ctr = 0"
- line 272, "pan.___", state 1532, "cache_dirty_urcu_active_readers = 0"
- line 276, "pan.___", state 1545, "cache_dirty_rcu_ptr = 0"
- line 280, "pan.___", state 1554, "cache_dirty_rcu_data[i] = 0"
- line 245, "pan.___", state 1570, "(1)"
- line 249, "pan.___", state 1578, "(1)"
- line 253, "pan.___", state 1590, "(1)"
- line 257, "pan.___", state 1598, "(1)"
- line 1304, "pan.___", state 1614, "-end-"
- (103 of 1614 states)
-unreached in proctype :init:
- (0 of 28 states)
-unreached in proctype :never:
- line 1369, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 1.54e+04 seconds
-pan: rate 15645.145 states/second
-pan: avg transition delay 3.1947e-06 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
+++ /dev/null
-#define WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DCOLLAPSE -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1363)
-depth 7: Claim reached state 9 (line 1368)
-depth 50: Claim reached state 9 (line 1367)
-Depth= 7070 States= 1e+06 Transitions= 1.16e+07 Memory= 492.912 t= 33.7 R= 3e+04
-Depth= 7070 States= 2e+06 Transitions= 2.31e+07 Memory= 521.233 t= 68 R= 3e+04
-Depth= 7070 States= 3e+06 Transitions= 3.43e+07 Memory= 549.358 t= 102 R= 3e+04
-pan: resizing hashtable to -w22.. done
-pan: acceptance cycle (at depth 1558)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
- + Compression
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 80 byte, depth reached 7070, errors: 1
- 1856640 states, stored (3.13554e+06 visited)
- 32657997 states, matched
- 35793542 transitions (= visited+matched)
-5.1088012e+08 atomic steps
-hash conflicts: 10885217 (resolved)
-
-Stats on memory usage (in Megabytes):
- 205.393 equivalent memory usage for states (stored*(State-vector + overhead))
- 93.456 actual memory usage for states (compression: 45.50%)
- state-vector as stored = 17 byte + 36 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 583.115 total actual memory usage
-
-nr of templates: [ globals chans procs ]
-collapse counts: [ 12368 744 254 2 2 ]
-unreached in proctype urcu_reader
- line 269, "pan.___", state 57, "cache_dirty_urcu_gp_ctr = 0"
- line 277, "pan.___", state 79, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 88, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 104, "(1)"
- line 250, "pan.___", state 112, "(1)"
- line 254, "pan.___", state 124, "(1)"
- line 258, "pan.___", state 132, "(1)"
- line 408, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 190, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 204, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 222, "(1)"
- line 254, "pan.___", state 242, "(1)"
- line 258, "pan.___", state 250, "(1)"
- line 688, "pan.___", state 269, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 408, "pan.___", state 276, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 308, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 322, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 340, "(1)"
- line 254, "pan.___", state 360, "(1)"
- line 258, "pan.___", state 368, "(1)"
- line 408, "pan.___", state 387, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 419, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 433, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 451, "(1)"
- line 254, "pan.___", state 471, "(1)"
- line 258, "pan.___", state 479, "(1)"
- line 408, "pan.___", state 500, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 502, "(1)"
- line 408, "pan.___", state 503, "(cache_dirty_urcu_gp_ctr)"
- line 408, "pan.___", state 503, "else"
- line 408, "pan.___", state 506, "(1)"
- line 412, "pan.___", state 514, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 516, "(1)"
- line 412, "pan.___", state 517, "(cache_dirty_urcu_active_readers)"
- line 412, "pan.___", state 517, "else"
- line 412, "pan.___", state 520, "(1)"
- line 412, "pan.___", state 521, "(1)"
- line 412, "pan.___", state 521, "(1)"
- line 410, "pan.___", state 526, "((i<1))"
- line 410, "pan.___", state 526, "((i>=1))"
- line 417, "pan.___", state 532, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 534, "(1)"
- line 417, "pan.___", state 535, "(cache_dirty_rcu_ptr)"
- line 417, "pan.___", state 535, "else"
- line 417, "pan.___", state 538, "(1)"
- line 417, "pan.___", state 539, "(1)"
- line 417, "pan.___", state 539, "(1)"
- line 421, "pan.___", state 546, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 548, "(1)"
- line 421, "pan.___", state 549, "(cache_dirty_rcu_data[i])"
- line 421, "pan.___", state 549, "else"
- line 421, "pan.___", state 552, "(1)"
- line 421, "pan.___", state 553, "(1)"
- line 421, "pan.___", state 553, "(1)"
- line 419, "pan.___", state 558, "((i<2))"
- line 419, "pan.___", state 558, "((i>=2))"
- line 246, "pan.___", state 564, "(1)"
- line 250, "pan.___", state 572, "(1)"
- line 250, "pan.___", state 573, "(!(cache_dirty_urcu_active_readers))"
- line 250, "pan.___", state 573, "else"
- line 248, "pan.___", state 578, "((i<1))"
- line 248, "pan.___", state 578, "((i>=1))"
- line 254, "pan.___", state 584, "(1)"
- line 254, "pan.___", state 585, "(!(cache_dirty_rcu_ptr))"
- line 254, "pan.___", state 585, "else"
- line 258, "pan.___", state 592, "(1)"
- line 258, "pan.___", state 593, "(!(cache_dirty_rcu_data[i]))"
- line 258, "pan.___", state 593, "else"
- line 256, "pan.___", state 598, "((i<2))"
- line 256, "pan.___", state 598, "((i>=2))"
- line 263, "pan.___", state 602, "(!(cache_dirty_urcu_gp_ctr))"
- line 263, "pan.___", state 602, "else"
- line 428, "pan.___", state 604, "(1)"
- line 428, "pan.___", state 604, "(1)"
- line 688, "pan.___", state 607, "cached_urcu_active_readers = (tmp+1)"
- line 688, "pan.___", state 608, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 688, "pan.___", state 609, "(1)"
- line 408, "pan.___", state 616, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 648, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 662, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 680, "(1)"
- line 254, "pan.___", state 700, "(1)"
- line 258, "pan.___", state 708, "(1)"
- line 408, "pan.___", state 734, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 766, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 780, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 798, "(1)"
- line 254, "pan.___", state 818, "(1)"
- line 258, "pan.___", state 826, "(1)"
- line 408, "pan.___", state 845, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 847, "(1)"
- line 408, "pan.___", state 848, "(cache_dirty_urcu_gp_ctr)"
- line 408, "pan.___", state 848, "else"
- line 408, "pan.___", state 851, "(1)"
- line 412, "pan.___", state 859, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 861, "(1)"
- line 412, "pan.___", state 862, "(cache_dirty_urcu_active_readers)"
- line 412, "pan.___", state 862, "else"
- line 412, "pan.___", state 865, "(1)"
- line 412, "pan.___", state 866, "(1)"
- line 412, "pan.___", state 866, "(1)"
- line 410, "pan.___", state 871, "((i<1))"
- line 410, "pan.___", state 871, "((i>=1))"
- line 417, "pan.___", state 877, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 879, "(1)"
- line 417, "pan.___", state 880, "(cache_dirty_rcu_ptr)"
- line 417, "pan.___", state 880, "else"
- line 417, "pan.___", state 883, "(1)"
- line 417, "pan.___", state 884, "(1)"
- line 417, "pan.___", state 884, "(1)"
- line 421, "pan.___", state 891, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 893, "(1)"
- line 421, "pan.___", state 894, "(cache_dirty_rcu_data[i])"
- line 421, "pan.___", state 894, "else"
- line 421, "pan.___", state 897, "(1)"
- line 421, "pan.___", state 898, "(1)"
- line 421, "pan.___", state 898, "(1)"
- line 419, "pan.___", state 903, "((i<2))"
- line 419, "pan.___", state 903, "((i>=2))"
- line 246, "pan.___", state 909, "(1)"
- line 250, "pan.___", state 917, "(1)"
- line 250, "pan.___", state 918, "(!(cache_dirty_urcu_active_readers))"
- line 250, "pan.___", state 918, "else"
- line 248, "pan.___", state 923, "((i<1))"
- line 248, "pan.___", state 923, "((i>=1))"
- line 254, "pan.___", state 929, "(1)"
- line 254, "pan.___", state 930, "(!(cache_dirty_rcu_ptr))"
- line 254, "pan.___", state 930, "else"
- line 258, "pan.___", state 937, "(1)"
- line 258, "pan.___", state 938, "(!(cache_dirty_rcu_data[i]))"
- line 258, "pan.___", state 938, "else"
- line 256, "pan.___", state 943, "((i<2))"
- line 256, "pan.___", state 943, "((i>=2))"
- line 263, "pan.___", state 947, "(!(cache_dirty_urcu_gp_ctr))"
- line 263, "pan.___", state 947, "else"
- line 428, "pan.___", state 949, "(1)"
- line 428, "pan.___", state 949, "(1)"
- line 696, "pan.___", state 953, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 408, "pan.___", state 958, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 990, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1004, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1022, "(1)"
- line 254, "pan.___", state 1042, "(1)"
- line 258, "pan.___", state 1050, "(1)"
- line 408, "pan.___", state 1072, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1104, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1118, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1136, "(1)"
- line 254, "pan.___", state 1156, "(1)"
- line 258, "pan.___", state 1164, "(1)"
- line 408, "pan.___", state 1187, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1219, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1233, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1251, "(1)"
- line 254, "pan.___", state 1271, "(1)"
- line 258, "pan.___", state 1279, "(1)"
- line 408, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1330, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1344, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1362, "(1)"
- line 254, "pan.___", state 1382, "(1)"
- line 258, "pan.___", state 1390, "(1)"
- line 408, "pan.___", state 1414, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1446, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1460, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1478, "(1)"
- line 254, "pan.___", state 1498, "(1)"
- line 258, "pan.___", state 1506, "(1)"
- line 408, "pan.___", state 1525, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1557, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1571, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1589, "(1)"
- line 254, "pan.___", state 1609, "(1)"
- line 258, "pan.___", state 1617, "(1)"
- line 408, "pan.___", state 1639, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1671, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1685, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1703, "(1)"
- line 254, "pan.___", state 1723, "(1)"
- line 258, "pan.___", state 1731, "(1)"
- line 735, "pan.___", state 1750, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 408, "pan.___", state 1757, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1789, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1803, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1821, "(1)"
- line 254, "pan.___", state 1841, "(1)"
- line 258, "pan.___", state 1849, "(1)"
- line 408, "pan.___", state 1868, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 1900, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 1914, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1932, "(1)"
- line 254, "pan.___", state 1952, "(1)"
- line 258, "pan.___", state 1960, "(1)"
- line 408, "pan.___", state 1981, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 1983, "(1)"
- line 408, "pan.___", state 1984, "(cache_dirty_urcu_gp_ctr)"
- line 408, "pan.___", state 1984, "else"
- line 408, "pan.___", state 1987, "(1)"
- line 412, "pan.___", state 1995, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 1997, "(1)"
- line 412, "pan.___", state 1998, "(cache_dirty_urcu_active_readers)"
- line 412, "pan.___", state 1998, "else"
- line 412, "pan.___", state 2001, "(1)"
- line 412, "pan.___", state 2002, "(1)"
- line 412, "pan.___", state 2002, "(1)"
- line 410, "pan.___", state 2007, "((i<1))"
- line 410, "pan.___", state 2007, "((i>=1))"
- line 417, "pan.___", state 2013, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 2015, "(1)"
- line 417, "pan.___", state 2016, "(cache_dirty_rcu_ptr)"
- line 417, "pan.___", state 2016, "else"
- line 417, "pan.___", state 2019, "(1)"
- line 417, "pan.___", state 2020, "(1)"
- line 417, "pan.___", state 2020, "(1)"
- line 421, "pan.___", state 2027, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 2029, "(1)"
- line 421, "pan.___", state 2030, "(cache_dirty_rcu_data[i])"
- line 421, "pan.___", state 2030, "else"
- line 421, "pan.___", state 2033, "(1)"
- line 421, "pan.___", state 2034, "(1)"
- line 421, "pan.___", state 2034, "(1)"
- line 419, "pan.___", state 2039, "((i<2))"
- line 419, "pan.___", state 2039, "((i>=2))"
- line 246, "pan.___", state 2045, "(1)"
- line 250, "pan.___", state 2053, "(1)"
- line 250, "pan.___", state 2054, "(!(cache_dirty_urcu_active_readers))"
- line 250, "pan.___", state 2054, "else"
- line 248, "pan.___", state 2059, "((i<1))"
- line 248, "pan.___", state 2059, "((i>=1))"
- line 254, "pan.___", state 2065, "(1)"
- line 254, "pan.___", state 2066, "(!(cache_dirty_rcu_ptr))"
- line 254, "pan.___", state 2066, "else"
- line 258, "pan.___", state 2073, "(1)"
- line 258, "pan.___", state 2074, "(!(cache_dirty_rcu_data[i]))"
- line 258, "pan.___", state 2074, "else"
- line 256, "pan.___", state 2079, "((i<2))"
- line 256, "pan.___", state 2079, "((i>=2))"
- line 263, "pan.___", state 2083, "(!(cache_dirty_urcu_gp_ctr))"
- line 263, "pan.___", state 2083, "else"
- line 428, "pan.___", state 2085, "(1)"
- line 428, "pan.___", state 2085, "(1)"
- line 735, "pan.___", state 2088, "cached_urcu_active_readers = (tmp+1)"
- line 735, "pan.___", state 2089, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 735, "pan.___", state 2090, "(1)"
- line 408, "pan.___", state 2097, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 2129, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 2143, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 2161, "(1)"
- line 254, "pan.___", state 2181, "(1)"
- line 258, "pan.___", state 2189, "(1)"
- line 408, "pan.___", state 2214, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 2246, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 2260, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 2278, "(1)"
- line 254, "pan.___", state 2298, "(1)"
- line 258, "pan.___", state 2306, "(1)"
- line 408, "pan.___", state 2325, "cache_dirty_urcu_gp_ctr = 0"
- line 417, "pan.___", state 2357, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 2371, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 2389, "(1)"
- line 254, "pan.___", state 2409, "(1)"
- line 258, "pan.___", state 2417, "(1)"
- line 246, "pan.___", state 2448, "(1)"
- line 254, "pan.___", state 2468, "(1)"
- line 258, "pan.___", state 2476, "(1)"
- line 246, "pan.___", state 2491, "(1)"
- line 254, "pan.___", state 2511, "(1)"
- line 258, "pan.___", state 2519, "(1)"
- line 930, "pan.___", state 2536, "-end-"
- (221 of 2536 states)
-unreached in proctype urcu_writer
- line 408, "pan.___", state 45, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 59, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 77, "cache_dirty_rcu_ptr = 0"
- line 246, "pan.___", state 109, "(1)"
- line 250, "pan.___", state 117, "(1)"
- line 254, "pan.___", state 129, "(1)"
- line 269, "pan.___", state 158, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 167, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 180, "cache_dirty_rcu_ptr = 0"
- line 408, "pan.___", state 220, "cache_dirty_urcu_gp_ctr = 0"
- line 412, "pan.___", state 234, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 252, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 266, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 284, "(1)"
- line 250, "pan.___", state 292, "(1)"
- line 254, "pan.___", state 304, "(1)"
- line 258, "pan.___", state 312, "(1)"
- line 412, "pan.___", state 347, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 365, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 379, "cache_dirty_rcu_data[i] = 0"
- line 250, "pan.___", state 405, "(1)"
- line 254, "pan.___", state 417, "(1)"
- line 258, "pan.___", state 425, "(1)"
- line 408, "pan.___", state 450, "cache_dirty_urcu_gp_ctr = 0"
- line 408, "pan.___", state 452, "(1)"
- line 408, "pan.___", state 453, "(cache_dirty_urcu_gp_ctr)"
- line 408, "pan.___", state 453, "else"
- line 408, "pan.___", state 456, "(1)"
- line 412, "pan.___", state 464, "cache_dirty_urcu_active_readers = 0"
- line 412, "pan.___", state 466, "(1)"
- line 412, "pan.___", state 467, "(cache_dirty_urcu_active_readers)"
- line 412, "pan.___", state 467, "else"
- line 412, "pan.___", state 470, "(1)"
- line 412, "pan.___", state 471, "(1)"
- line 412, "pan.___", state 471, "(1)"
- line 410, "pan.___", state 476, "((i<1))"
- line 410, "pan.___", state 476, "((i>=1))"
- line 417, "pan.___", state 482, "cache_dirty_rcu_ptr = 0"
- line 417, "pan.___", state 484, "(1)"
- line 417, "pan.___", state 485, "(cache_dirty_rcu_ptr)"
- line 417, "pan.___", state 485, "else"
- line 417, "pan.___", state 488, "(1)"
- line 417, "pan.___", state 489, "(1)"
- line 417, "pan.___", state 489, "(1)"
- line 421, "pan.___", state 496, "cache_dirty_rcu_data[i] = 0"
- line 421, "pan.___", state 498, "(1)"
- line 421, "pan.___", state 499, "(cache_dirty_rcu_data[i])"
- line 421, "pan.___", state 499, "else"
- line 421, "pan.___", state 502, "(1)"
- line 421, "pan.___", state 503, "(1)"
- line 421, "pan.___", state 503, "(1)"
- line 419, "pan.___", state 508, "((i<2))"
- line 419, "pan.___", state 508, "((i>=2))"
- line 246, "pan.___", state 514, "(1)"
- line 250, "pan.___", state 522, "(1)"
- line 250, "pan.___", state 523, "(!(cache_dirty_urcu_active_readers))"
- line 250, "pan.___", state 523, "else"
- line 248, "pan.___", state 528, "((i<1))"
- line 248, "pan.___", state 528, "((i>=1))"
- line 254, "pan.___", state 534, "(1)"
- line 254, "pan.___", state 535, "(!(cache_dirty_rcu_ptr))"
- line 254, "pan.___", state 535, "else"
- line 258, "pan.___", state 542, "(1)"
- line 258, "pan.___", state 543, "(!(cache_dirty_rcu_data[i]))"
- line 258, "pan.___", state 543, "else"
- line 263, "pan.___", state 552, "(!(cache_dirty_urcu_gp_ctr))"
- line 263, "pan.___", state 552, "else"
- line 428, "pan.___", state 554, "(1)"
- line 428, "pan.___", state 554, "(1)"
- line 412, "pan.___", state 574, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 592, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 606, "cache_dirty_rcu_data[i] = 0"
- line 250, "pan.___", state 632, "(1)"
- line 254, "pan.___", state 644, "(1)"
- line 258, "pan.___", state 652, "(1)"
- line 412, "pan.___", state 685, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 703, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 717, "cache_dirty_rcu_data[i] = 0"
- line 250, "pan.___", state 743, "(1)"
- line 254, "pan.___", state 755, "(1)"
- line 258, "pan.___", state 763, "(1)"
- line 412, "pan.___", state 798, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 816, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 830, "cache_dirty_rcu_data[i] = 0"
- line 250, "pan.___", state 856, "(1)"
- line 254, "pan.___", state 868, "(1)"
- line 258, "pan.___", state 876, "(1)"
- line 412, "pan.___", state 914, "cache_dirty_urcu_active_readers = 0"
- line 417, "pan.___", state 932, "cache_dirty_rcu_ptr = 0"
- line 421, "pan.___", state 946, "cache_dirty_rcu_data[i] = 0"
- line 250, "pan.___", state 972, "(1)"
- line 254, "pan.___", state 984, "(1)"
- line 258, "pan.___", state 992, "(1)"
- line 269, "pan.___", state 1036, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 1045, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1060, "(1)"
- line 281, "pan.___", state 1067, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1083, "(1)"
- line 250, "pan.___", state 1091, "(1)"
- line 254, "pan.___", state 1103, "(1)"
- line 258, "pan.___", state 1111, "(1)"
- line 269, "pan.___", state 1142, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 1151, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1164, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 1173, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1189, "(1)"
- line 250, "pan.___", state 1197, "(1)"
- line 254, "pan.___", state 1209, "(1)"
- line 258, "pan.___", state 1217, "(1)"
- line 273, "pan.___", state 1243, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1256, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 1265, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1281, "(1)"
- line 250, "pan.___", state 1289, "(1)"
- line 254, "pan.___", state 1301, "(1)"
- line 258, "pan.___", state 1309, "(1)"
- line 269, "pan.___", state 1340, "cache_dirty_urcu_gp_ctr = 0"
- line 273, "pan.___", state 1349, "cache_dirty_urcu_active_readers = 0"
- line 277, "pan.___", state 1362, "cache_dirty_rcu_ptr = 0"
- line 281, "pan.___", state 1371, "cache_dirty_rcu_data[i] = 0"
- line 246, "pan.___", state 1387, "(1)"
- line 250, "pan.___", state 1395, "(1)"
- line 254, "pan.___", state 1407, "(1)"
- line 258, "pan.___", state 1415, "(1)"
- line 1305, "pan.___", state 1431, "-end-"
- (110 of 1431 states)
-unreached in proctype :init:
- (0 of 28 states)
-unreached in proctype :never:
- line 1370, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 106 seconds
-pan: rate 29466.638 states/second
-pan: avg transition delay 2.9729e-06 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi-compress'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-1491:1:1067
-1492:1:1068
-1493:1:1072
-1494:1:1073
-1495:1:1081
-1496:1:1082
-1497:1:1083
-1498:1:1095
-1499:1:1100
-1500:1:1104
-1501:1:1105
-1502:1:1113
-1503:1:1114
-1504:1:1118
-1505:1:1119
-1506:1:1113
-1507:1:1114
-1508:1:1118
-1509:1:1119
-1510:1:1127
-1511:1:1132
-1512:1:1139
-1513:1:1140
-1514:1:1147
-1515:1:1152
-1516:1:1159
-1517:1:1160
-1518:1:1159
-1519:1:1160
-1520:1:1167
-1521:0:4001
-1522:1:42
-1523:0:4001
-1524:1:43
-1525:0:4001
-1526:2:3315
-1527:2:3316
-1528:2:3317
-1529:2:3329
-1530:2:3330
-1531:2:3334
-1532:2:3335
-1533:2:3343
-1534:2:3348
-1535:2:3352
-1536:2:3353
-1537:2:3361
-1538:2:3362
-1539:2:3366
-1540:2:3367
-1541:2:3361
-1542:2:3362
-1543:2:3366
-1544:2:3367
-1545:2:3375
-1546:2:3380
-1547:2:3387
-1548:2:3388
-1549:2:3395
-1550:2:3400
-1551:2:3407
-1552:2:3408
-1553:2:3407
-1554:2:3408
-1555:2:3415
-1556:2:3425
-1557:0:4001
-1558:2:2575
--1:-1:-1
-1559:0:4001
-1560:2:3431
-1561:2:3432
-1562:2:3436
-1563:2:3437
-1564:2:3445
-1565:2:3446
-1566:2:3450
-1567:2:3451
-1568:2:3459
-1569:2:3464
-1570:2:3468
-1571:2:3469
-1572:2:3477
-1573:2:3478
-1574:2:3482
-1575:2:3483
-1576:2:3477
-1577:2:3478
-1578:2:3482
-1579:2:3483
-1580:2:3491
-1581:2:3496
-1582:2:3503
-1583:2:3504
-1584:2:3511
-1585:2:3516
-1586:2:3523
-1587:2:3524
-1588:2:3523
-1589:2:3524
-1590:2:3531
-1591:0:4001
-1592:2:2575
-1593:0:4001
-1594:2:3315
-1595:2:3316
-1596:2:3320
-1597:2:3321
-1598:2:3329
-1599:2:3330
-1600:2:3334
-1601:2:3335
-1602:2:3343
-1603:2:3348
-1604:2:3352
-1605:2:3353
-1606:2:3361
-1607:2:3362
-1608:2:3366
-1609:2:3367
-1610:2:3361
-1611:2:3362
-1612:2:3366
-1613:2:3367
-1614:2:3375
-1615:2:3380
-1616:2:3387
-1617:2:3388
-1618:2:3395
-1619:2:3400
-1620:2:3407
-1621:2:3408
-1622:2:3407
-1623:2:3408
-1624:2:3415
-1625:2:3425
-1626:0:4001
-1627:2:2575
-1628:0:4001
-1629:2:3431
-1630:2:3432
-1631:2:3436
-1632:2:3437
-1633:2:3445
-1634:2:3446
-1635:2:3450
-1636:2:3451
-1637:2:3459
-1638:2:3464
-1639:2:3468
-1640:2:3469
-1641:2:3477
-1642:2:3478
-1643:2:3482
-1644:2:3483
-1645:2:3477
-1646:2:3478
-1647:2:3482
-1648:2:3483
-1649:2:3491
-1650:2:3496
-1651:2:3503
-1652:2:3504
-1653:2:3511
-1654:2:3516
-1655:2:3523
-1656:2:3524
-1657:2:3523
-1658:2:3524
-1659:2:3531
-1660:0:4001
-1661:2:2575
-1662:0:4001
-1663:2:3315
-1664:2:3316
-1665:2:3320
-1666:2:3321
-1667:2:3329
-1668:2:3330
-1669:2:3334
-1670:2:3335
-1671:2:3343
-1672:2:3348
-1673:2:3352
-1674:2:3353
-1675:2:3361
-1676:2:3362
-1677:2:3366
-1678:2:3367
-1679:2:3361
-1680:2:3362
-1681:2:3366
-1682:2:3367
-1683:2:3375
-1684:2:3380
-1685:2:3387
-1686:2:3388
-1687:2:3395
-1688:2:3400
-1689:2:3407
-1690:2:3408
-1691:2:3407
-1692:2:3408
-1693:2:3415
-1694:2:3425
-1695:0:4001
-1696:2:2575
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1294)
-Depth= 9223 States= 1e+06 Transitions= 6.87e+06 Memory= 550.432 t= 16.6 R= 6e+04
-Depth= 9223 States= 2e+06 Transitions= 1.47e+07 Memory= 634.318 t= 36.7 R= 5e+04
-Depth= 9223 States= 3e+06 Transitions= 2.46e+07 Memory= 718.303 t= 62.6 R= 5e+04
-pan: resizing hashtable to -w22.. done
-Depth= 9223 States= 4e+06 Transitions= 3.19e+07 Memory= 833.311 t= 81.2 R= 5e+04
-Depth= 9223 States= 5e+06 Transitions= 3.95e+07 Memory= 917.295 t= 100 R= 5e+04
-Depth= 9223 States= 6e+06 Transitions= 5.71e+07 Memory= 1001.279 t= 149 R= 4e+04
-Depth= 9223 States= 7e+06 Transitions= 6.81e+07 Memory= 1085.264 t= 178 R= 4e+04
-Depth= 9223 States= 8e+06 Transitions= 8.22e+07 Memory= 1169.151 t= 216 R= 4e+04
-Depth= 9223 States= 9e+06 Transitions= 9.54e+07 Memory= 1253.135 t= 252 R= 4e+04
-pan: resizing hashtable to -w24.. done
-Depth= 9223 States= 1e+07 Transitions= 1.08e+08 Memory= 1461.115 t= 288 R= 3e+04
-Depth= 9223 States= 1.1e+07 Transitions= 1.21e+08 Memory= 1545.100 t= 321 R= 3e+04
-Depth= 9223 States= 1.2e+07 Transitions= 1.3e+08 Memory= 1629.084 t= 345 R= 3e+04
-Depth= 9223 States= 1.3e+07 Transitions= 1.42e+08 Memory= 1713.068 t= 378 R= 3e+04
-Depth= 9223 States= 1.4e+07 Transitions= 1.72e+08 Memory= 1797.053 t= 463 R= 3e+04
-Depth= 9223 States= 1.5e+07 Transitions= 1.91e+08 Memory= 1881.037 t= 516 R= 3e+04
-Depth= 9223 States= 1.6e+07 Transitions= 2.08e+08 Memory= 1964.924 t= 562 R= 3e+04
-Depth= 9223 States= 1.7e+07 Transitions= 2.2e+08 Memory= 2048.908 t= 595 R= 3e+04
-Depth= 9223 States= 1.8e+07 Transitions= 2.39e+08 Memory= 2132.893 t= 647 R= 3e+04
-Depth= 9223 States= 1.9e+07 Transitions= 2.55e+08 Memory= 2216.877 t= 691 R= 3e+04
-Depth= 9223 States= 2e+07 Transitions= 2.72e+08 Memory= 2300.861 t= 739 R= 3e+04
-Depth= 9285 States= 2.1e+07 Transitions= 2.85e+08 Memory= 2384.846 t= 774 R= 3e+04
-Depth= 9324 States= 2.2e+07 Transitions= 2.99e+08 Memory= 2468.830 t= 812 R= 3e+04
-Depth= 9324 States= 2.3e+07 Transitions= 3.1e+08 Memory= 2552.717 t= 842 R= 3e+04
-Depth= 9324 States= 2.4e+07 Transitions= 3.21e+08 Memory= 2636.701 t= 873 R= 3e+04
-Depth= 9324 States= 2.5e+07 Transitions= 3.34e+08 Memory= 2720.686 t= 908 R= 3e+04
-Depth= 9324 States= 2.6e+07 Transitions= 3.45e+08 Memory= 2804.670 t= 939 R= 3e+04
-Depth= 9324 States= 2.7e+07 Transitions= 3.59e+08 Memory= 2888.654 t= 975 R= 3e+04
-Depth= 9324 States= 2.8e+07 Transitions= 3.71e+08 Memory= 2972.639 t= 1.01e+03 R= 3e+04
-Depth= 9324 States= 2.9e+07 Transitions= 3.84e+08 Memory= 3056.526 t= 1.04e+03 R= 3e+04
-Depth= 9324 States= 3e+07 Transitions= 3.96e+08 Memory= 3140.510 t= 1.08e+03 R= 3e+04
-Depth= 9324 States= 3.1e+07 Transitions= 4.09e+08 Memory= 3224.494 t= 1.11e+03 R= 3e+04
-Depth= 9324 States= 3.2e+07 Transitions= 4.19e+08 Memory= 3308.479 t= 1.14e+03 R= 3e+04
-Depth= 9324 States= 3.3e+07 Transitions= 4.3e+08 Memory= 3392.463 t= 1.17e+03 R= 3e+04
-Depth= 9324 States= 3.4e+07 Transitions= 4.44e+08 Memory= 3476.447 t= 1.21e+03 R= 3e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9324 States= 3.5e+07 Transitions= 4.6e+08 Memory= 4056.416 t= 1.26e+03 R= 3e+04
-Depth= 9324 States= 3.6e+07 Transitions= 4.73e+08 Memory= 4140.401 t= 1.3e+03 R= 3e+04
-Depth= 9324 States= 3.7e+07 Transitions= 4.89e+08 Memory= 4224.385 t= 1.34e+03 R= 3e+04
-Depth= 9324 States= 3.8e+07 Transitions= 5.04e+08 Memory= 4308.369 t= 1.38e+03 R= 3e+04
-Depth= 9324 States= 3.9e+07 Transitions= 5.18e+08 Memory= 4392.354 t= 1.42e+03 R= 3e+04
-Depth= 9324 States= 4e+07 Transitions= 5.28e+08 Memory= 4476.338 t= 1.44e+03 R= 3e+04
-Depth= 9324 States= 4.1e+07 Transitions= 5.38e+08 Memory= 4560.225 t= 1.47e+03 R= 3e+04
-Depth= 9324 States= 4.2e+07 Transitions= 5.5e+08 Memory= 4644.209 t= 1.5e+03 R= 3e+04
-Depth= 9324 States= 4.3e+07 Transitions= 5.76e+08 Memory= 4728.193 t= 1.58e+03 R= 3e+04
-Depth= 9324 States= 4.4e+07 Transitions= 6.01e+08 Memory= 4812.178 t= 1.65e+03 R= 3e+04
-Depth= 9324 States= 4.5e+07 Transitions= 6.18e+08 Memory= 4896.162 t= 1.69e+03 R= 3e+04
-Depth= 9324 States= 4.6e+07 Transitions= 6.29e+08 Memory= 4980.147 t= 1.72e+03 R= 3e+04
-Depth= 9324 States= 4.7e+07 Transitions= 6.44e+08 Memory= 5064.131 t= 1.76e+03 R= 3e+04
-Depth= 9324 States= 4.8e+07 Transitions= 6.63e+08 Memory= 5148.018 t= 1.82e+03 R= 3e+04
-Depth= 9324 States= 4.9e+07 Transitions= 6.8e+08 Memory= 5232.002 t= 1.86e+03 R= 3e+04
-Depth= 9324 States= 5e+07 Transitions= 6.94e+08 Memory= 5315.986 t= 1.9e+03 R= 3e+04
-Depth= 9324 States= 5.1e+07 Transitions= 7.07e+08 Memory= 5399.971 t= 1.94e+03 R= 3e+04
-Depth= 9324 States= 5.2e+07 Transitions= 7.19e+08 Memory= 5483.955 t= 1.97e+03 R= 3e+04
-Depth= 9324 States= 5.3e+07 Transitions= 7.33e+08 Memory= 5567.940 t= 2.01e+03 R= 3e+04
-Depth= 9324 States= 5.4e+07 Transitions= 7.43e+08 Memory= 5651.826 t= 2.03e+03 R= 3e+04
-Depth= 9324 States= 5.5e+07 Transitions= 7.56e+08 Memory= 5735.811 t= 2.07e+03 R= 3e+04
-Depth= 9324 States= 5.6e+07 Transitions= 7.67e+08 Memory= 5819.795 t= 2.1e+03 R= 3e+04
-Depth= 9324 States= 5.7e+07 Transitions= 7.82e+08 Memory= 5903.779 t= 2.14e+03 R= 3e+04
-Depth= 9324 States= 5.8e+07 Transitions= 7.92e+08 Memory= 5987.764 t= 2.17e+03 R= 3e+04
-Depth= 9324 States= 5.9e+07 Transitions= 8.05e+08 Memory= 6071.748 t= 2.2e+03 R= 3e+04
-Depth= 9324 States= 6e+07 Transitions= 8.17e+08 Memory= 6155.733 t= 2.23e+03 R= 3e+04
-Depth= 9324 States= 6.1e+07 Transitions= 8.27e+08 Memory= 6239.619 t= 2.26e+03 R= 3e+04
-Depth= 9324 States= 6.2e+07 Transitions= 8.39e+08 Memory= 6323.604 t= 2.29e+03 R= 3e+04
-Depth= 9324 States= 6.3e+07 Transitions= 8.57e+08 Memory= 6407.588 t= 2.34e+03 R= 3e+04
-Depth= 9324 States= 6.4e+07 Transitions= 8.68e+08 Memory= 6491.572 t= 2.37e+03 R= 3e+04
-Depth= 9324 States= 6.5e+07 Transitions= 8.83e+08 Memory= 6575.557 t= 2.41e+03 R= 3e+04
-Depth= 9324 States= 6.6e+07 Transitions= 8.98e+08 Memory= 6659.541 t= 2.45e+03 R= 3e+04
-Depth= 9324 States= 6.7e+07 Transitions= 9.13e+08 Memory= 6743.428 t= 2.49e+03 R= 3e+04
-Depth= 9324 States= 6.8e+07 Transitions= 9.28e+08 Memory= 6827.412 t= 2.53e+03 R= 3e+04
-Depth= 9324 States= 6.9e+07 Transitions= 9.42e+08 Memory= 6911.397 t= 2.57e+03 R= 3e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 9324, errors: 0
- 69786664 states, stored
-8.8218731e+08 states, matched
-9.5197398e+08 transitions (= stored+matched)
-1.4613809e+10 atomic steps
-hash conflicts: 5.3037519e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7720.235 equivalent memory usage for states (stored*(State-vector + overhead))
- 6011.129 actual memory usage for states (compression: 77.86%)
- state-vector as stored = 62 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 3.383 memory lost to fragmentation
- 6977.510 total actual memory usage
-
-unreached in proctype urcu_reader
- line 271, "pan.___", state 30, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 61, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 77, "(1)"
- line 252, "pan.___", state 85, "(1)"
- line 256, "pan.___", state 97, "(1)"
- line 260, "pan.___", state 105, "(1)"
- line 410, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 163, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 177, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 195, "(1)"
- line 256, "pan.___", state 215, "(1)"
- line 260, "pan.___", state 223, "(1)"
- line 690, "pan.___", state 242, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 410, "pan.___", state 249, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 281, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 295, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 313, "(1)"
- line 256, "pan.___", state 333, "(1)"
- line 260, "pan.___", state 341, "(1)"
- line 410, "pan.___", state 360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 392, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 406, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 424, "(1)"
- line 256, "pan.___", state 444, "(1)"
- line 260, "pan.___", state 452, "(1)"
- line 410, "pan.___", state 473, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 475, "(1)"
- line 410, "pan.___", state 476, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 476, "else"
- line 410, "pan.___", state 479, "(1)"
- line 414, "pan.___", state 487, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 489, "(1)"
- line 414, "pan.___", state 490, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 490, "else"
- line 414, "pan.___", state 493, "(1)"
- line 414, "pan.___", state 494, "(1)"
- line 414, "pan.___", state 494, "(1)"
- line 412, "pan.___", state 499, "((i<1))"
- line 412, "pan.___", state 499, "((i>=1))"
- line 419, "pan.___", state 505, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 507, "(1)"
- line 419, "pan.___", state 508, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 508, "else"
- line 419, "pan.___", state 511, "(1)"
- line 419, "pan.___", state 512, "(1)"
- line 419, "pan.___", state 512, "(1)"
- line 423, "pan.___", state 519, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 521, "(1)"
- line 423, "pan.___", state 522, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 522, "else"
- line 423, "pan.___", state 525, "(1)"
- line 423, "pan.___", state 526, "(1)"
- line 423, "pan.___", state 526, "(1)"
- line 421, "pan.___", state 531, "((i<2))"
- line 421, "pan.___", state 531, "((i>=2))"
- line 248, "pan.___", state 537, "(1)"
- line 252, "pan.___", state 545, "(1)"
- line 252, "pan.___", state 546, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, "pan.___", state 546, "else"
- line 250, "pan.___", state 551, "((i<1))"
- line 250, "pan.___", state 551, "((i>=1))"
- line 256, "pan.___", state 557, "(1)"
- line 256, "pan.___", state 558, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, "pan.___", state 558, "else"
- line 260, "pan.___", state 565, "(1)"
- line 260, "pan.___", state 566, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, "pan.___", state 566, "else"
- line 258, "pan.___", state 571, "((i<2))"
- line 258, "pan.___", state 571, "((i>=2))"
- line 265, "pan.___", state 575, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, "pan.___", state 575, "else"
- line 430, "pan.___", state 577, "(1)"
- line 430, "pan.___", state 577, "(1)"
- line 690, "pan.___", state 580, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 690, "pan.___", state 581, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 690, "pan.___", state 582, "(1)"
- line 410, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 621, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 635, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 653, "(1)"
- line 256, "pan.___", state 673, "(1)"
- line 260, "pan.___", state 681, "(1)"
- line 410, "pan.___", state 707, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 739, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 753, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 771, "(1)"
- line 256, "pan.___", state 791, "(1)"
- line 260, "pan.___", state 799, "(1)"
- line 410, "pan.___", state 818, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 820, "(1)"
- line 410, "pan.___", state 821, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 821, "else"
- line 410, "pan.___", state 824, "(1)"
- line 414, "pan.___", state 832, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 834, "(1)"
- line 414, "pan.___", state 835, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 835, "else"
- line 414, "pan.___", state 838, "(1)"
- line 414, "pan.___", state 839, "(1)"
- line 414, "pan.___", state 839, "(1)"
- line 412, "pan.___", state 844, "((i<1))"
- line 412, "pan.___", state 844, "((i>=1))"
- line 419, "pan.___", state 850, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 852, "(1)"
- line 419, "pan.___", state 853, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 853, "else"
- line 419, "pan.___", state 856, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 423, "pan.___", state 864, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 866, "(1)"
- line 423, "pan.___", state 867, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 867, "else"
- line 423, "pan.___", state 870, "(1)"
- line 423, "pan.___", state 871, "(1)"
- line 423, "pan.___", state 871, "(1)"
- line 421, "pan.___", state 876, "((i<2))"
- line 421, "pan.___", state 876, "((i>=2))"
- line 248, "pan.___", state 882, "(1)"
- line 252, "pan.___", state 890, "(1)"
- line 252, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, "pan.___", state 891, "else"
- line 250, "pan.___", state 896, "((i<1))"
- line 250, "pan.___", state 896, "((i>=1))"
- line 256, "pan.___", state 902, "(1)"
- line 256, "pan.___", state 903, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, "pan.___", state 903, "else"
- line 260, "pan.___", state 910, "(1)"
- line 260, "pan.___", state 911, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, "pan.___", state 911, "else"
- line 258, "pan.___", state 916, "((i<2))"
- line 258, "pan.___", state 916, "((i>=2))"
- line 265, "pan.___", state 920, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, "pan.___", state 920, "else"
- line 430, "pan.___", state 922, "(1)"
- line 430, "pan.___", state 922, "(1)"
- line 698, "pan.___", state 926, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 410, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 963, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 977, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 995, "(1)"
- line 256, "pan.___", state 1015, "(1)"
- line 260, "pan.___", state 1023, "(1)"
- line 410, "pan.___", state 1045, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1077, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1091, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1109, "(1)"
- line 256, "pan.___", state 1129, "(1)"
- line 260, "pan.___", state 1137, "(1)"
- line 410, "pan.___", state 1160, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1192, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1206, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1224, "(1)"
- line 256, "pan.___", state 1244, "(1)"
- line 260, "pan.___", state 1252, "(1)"
- line 410, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1303, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1317, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1335, "(1)"
- line 256, "pan.___", state 1355, "(1)"
- line 260, "pan.___", state 1363, "(1)"
- line 410, "pan.___", state 1387, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1419, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1433, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1451, "(1)"
- line 256, "pan.___", state 1471, "(1)"
- line 260, "pan.___", state 1479, "(1)"
- line 410, "pan.___", state 1498, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1530, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1544, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1562, "(1)"
- line 256, "pan.___", state 1582, "(1)"
- line 260, "pan.___", state 1590, "(1)"
- line 410, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1644, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1658, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1676, "(1)"
- line 256, "pan.___", state 1696, "(1)"
- line 260, "pan.___", state 1704, "(1)"
- line 737, "pan.___", state 1723, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 410, "pan.___", state 1730, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1762, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1776, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1794, "(1)"
- line 256, "pan.___", state 1814, "(1)"
- line 260, "pan.___", state 1822, "(1)"
- line 410, "pan.___", state 1841, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1873, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1887, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1905, "(1)"
- line 256, "pan.___", state 1925, "(1)"
- line 260, "pan.___", state 1933, "(1)"
- line 410, "pan.___", state 1954, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1956, "(1)"
- line 410, "pan.___", state 1957, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 1957, "else"
- line 410, "pan.___", state 1960, "(1)"
- line 414, "pan.___", state 1968, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1970, "(1)"
- line 414, "pan.___", state 1971, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 1971, "else"
- line 414, "pan.___", state 1974, "(1)"
- line 414, "pan.___", state 1975, "(1)"
- line 414, "pan.___", state 1975, "(1)"
- line 412, "pan.___", state 1980, "((i<1))"
- line 412, "pan.___", state 1980, "((i>=1))"
- line 419, "pan.___", state 1986, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1988, "(1)"
- line 419, "pan.___", state 1989, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 1989, "else"
- line 419, "pan.___", state 1992, "(1)"
- line 419, "pan.___", state 1993, "(1)"
- line 419, "pan.___", state 1993, "(1)"
- line 423, "pan.___", state 2000, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2002, "(1)"
- line 423, "pan.___", state 2003, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 2003, "else"
- line 423, "pan.___", state 2006, "(1)"
- line 423, "pan.___", state 2007, "(1)"
- line 423, "pan.___", state 2007, "(1)"
- line 421, "pan.___", state 2012, "((i<2))"
- line 421, "pan.___", state 2012, "((i>=2))"
- line 248, "pan.___", state 2018, "(1)"
- line 252, "pan.___", state 2026, "(1)"
- line 252, "pan.___", state 2027, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, "pan.___", state 2027, "else"
- line 250, "pan.___", state 2032, "((i<1))"
- line 250, "pan.___", state 2032, "((i>=1))"
- line 256, "pan.___", state 2038, "(1)"
- line 256, "pan.___", state 2039, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, "pan.___", state 2039, "else"
- line 260, "pan.___", state 2046, "(1)"
- line 260, "pan.___", state 2047, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, "pan.___", state 2047, "else"
- line 258, "pan.___", state 2052, "((i<2))"
- line 258, "pan.___", state 2052, "((i>=2))"
- line 265, "pan.___", state 2056, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, "pan.___", state 2056, "else"
- line 430, "pan.___", state 2058, "(1)"
- line 430, "pan.___", state 2058, "(1)"
- line 737, "pan.___", state 2061, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 737, "pan.___", state 2062, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 737, "pan.___", state 2063, "(1)"
- line 410, "pan.___", state 2070, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2102, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2116, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2134, "(1)"
- line 256, "pan.___", state 2154, "(1)"
- line 260, "pan.___", state 2162, "(1)"
- line 410, "pan.___", state 2187, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2219, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2233, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2251, "(1)"
- line 256, "pan.___", state 2271, "(1)"
- line 260, "pan.___", state 2279, "(1)"
- line 410, "pan.___", state 2298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2362, "(1)"
- line 256, "pan.___", state 2382, "(1)"
- line 260, "pan.___", state 2390, "(1)"
- line 248, "pan.___", state 2421, "(1)"
- line 256, "pan.___", state 2441, "(1)"
- line 260, "pan.___", state 2449, "(1)"
- line 248, "pan.___", state 2464, "(1)"
- line 256, "pan.___", state 2484, "(1)"
- line 260, "pan.___", state 2492, "(1)"
- line 897, "pan.___", state 2509, "-end-"
- (221 of 2509 states)
-unreached in proctype urcu_writer
- line 410, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 82, "(1)"
- line 252, "pan.___", state 90, "(1)"
- line 256, "pan.___", state 102, "(1)"
- line 271, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 257, "(1)"
- line 252, "pan.___", state 265, "(1)"
- line 256, "pan.___", state 277, "(1)"
- line 260, "pan.___", state 285, "(1)"
- line 414, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 378, "(1)"
- line 256, "pan.___", state 390, "(1)"
- line 260, "pan.___", state 398, "(1)"
- line 414, "pan.___", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 499, "(1)"
- line 256, "pan.___", state 511, "(1)"
- line 260, "pan.___", state 519, "(1)"
- line 414, "pan.___", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 610, "(1)"
- line 256, "pan.___", state 622, "(1)"
- line 260, "pan.___", state 630, "(1)"
- line 414, "pan.___", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 723, "(1)"
- line 256, "pan.___", state 735, "(1)"
- line 260, "pan.___", state 743, "(1)"
- line 271, "pan.___", state 796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 805, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 820, "(1)"
- line 283, "pan.___", state 827, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 843, "(1)"
- line 252, "pan.___", state 851, "(1)"
- line 256, "pan.___", state 863, "(1)"
- line 260, "pan.___", state 871, "(1)"
- line 271, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 911, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 924, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 933, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 949, "(1)"
- line 252, "pan.___", state 957, "(1)"
- line 256, "pan.___", state 969, "(1)"
- line 260, "pan.___", state 977, "(1)"
- line 275, "pan.___", state 1003, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1016, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1025, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1041, "(1)"
- line 252, "pan.___", state 1049, "(1)"
- line 256, "pan.___", state 1061, "(1)"
- line 260, "pan.___", state 1069, "(1)"
- line 271, "pan.___", state 1100, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 1109, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1122, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1131, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1147, "(1)"
- line 252, "pan.___", state 1155, "(1)"
- line 256, "pan.___", state 1167, "(1)"
- line 260, "pan.___", state 1175, "(1)"
- line 275, "pan.___", state 1201, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1214, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1239, "(1)"
- line 252, "pan.___", state 1247, "(1)"
- line 256, "pan.___", state 1259, "(1)"
- line 260, "pan.___", state 1267, "(1)"
- line 271, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 1307, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1320, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1329, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1345, "(1)"
- line 252, "pan.___", state 1353, "(1)"
- line 256, "pan.___", state 1365, "(1)"
- line 260, "pan.___", state 1373, "(1)"
- line 275, "pan.___", state 1399, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1412, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1421, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1437, "(1)"
- line 252, "pan.___", state 1445, "(1)"
- line 256, "pan.___", state 1457, "(1)"
- line 260, "pan.___", state 1465, "(1)"
- line 271, "pan.___", state 1496, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 1505, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1518, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1543, "(1)"
- line 252, "pan.___", state 1551, "(1)"
- line 256, "pan.___", state 1563, "(1)"
- line 260, "pan.___", state 1571, "(1)"
- line 1236, "pan.___", state 1587, "-end-"
- (103 of 1587 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1299, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 2.6e+03 seconds
-pan: rate 26856.415 states/second
-pan: avg transition delay 2.7296e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 8619 States= 1e+06 Transitions= 8e+06 Memory= 550.432 t= 20.2 R= 5e+04
-Depth= 8619 States= 2e+06 Transitions= 1.8e+07 Memory= 634.318 t= 46.3 R= 4e+04
-Depth= 8619 States= 3e+06 Transitions= 2.53e+07 Memory= 718.303 t= 64.9 R= 5e+04
-pan: resizing hashtable to -w22.. done
-Depth= 8619 States= 4e+06 Transitions= 3.53e+07 Memory= 833.311 t= 91.4 R= 4e+04
-Depth= 8619 States= 5e+06 Transitions= 5.71e+07 Memory= 917.295 t= 152 R= 3e+04
-Depth= 8619 States= 6e+06 Transitions= 6.81e+07 Memory= 1001.279 t= 181 R= 3e+04
-Depth= 8619 States= 7e+06 Transitions= 8.02e+07 Memory= 1085.264 t= 214 R= 3e+04
-Depth= 8619 States= 8e+06 Transitions= 8.9e+07 Memory= 1169.151 t= 238 R= 3e+04
-pan: claim violated! (at depth 1359)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 8619, errors: 1
- 8162162 states, stored
- 81941434 states, matched
- 90103596 transitions (= stored+matched)
-1.3256628e+09 atomic steps
-hash conflicts: 60101961 (resolved)
-
-Stats on memory usage (in Megabytes):
- 902.949 equivalent memory usage for states (stored*(State-vector + overhead))
- 693.526 actual memory usage for states (compression: 76.81%)
- state-vector as stored = 61 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 1182.822 total actual memory usage
-
-unreached in proctype urcu_reader
- line 272, "pan.___", state 34, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 56, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 65, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 81, "(1)"
- line 253, "pan.___", state 89, "(1)"
- line 257, "pan.___", state 101, "(1)"
- line 261, "pan.___", state 109, "(1)"
- line 411, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 199, "(1)"
- line 257, "pan.___", state 219, "(1)"
- line 261, "pan.___", state 227, "(1)"
- line 700, "pan.___", state 246, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 253, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 285, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 299, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 317, "(1)"
- line 257, "pan.___", state 337, "(1)"
- line 261, "pan.___", state 345, "(1)"
- line 411, "pan.___", state 364, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 396, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 410, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 428, "(1)"
- line 257, "pan.___", state 448, "(1)"
- line 261, "pan.___", state 456, "(1)"
- line 411, "pan.___", state 477, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 479, "(1)"
- line 411, "pan.___", state 480, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 480, "else"
- line 411, "pan.___", state 483, "(1)"
- line 415, "pan.___", state 491, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 493, "(1)"
- line 415, "pan.___", state 494, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 494, "else"
- line 415, "pan.___", state 497, "(1)"
- line 415, "pan.___", state 498, "(1)"
- line 415, "pan.___", state 498, "(1)"
- line 413, "pan.___", state 503, "((i<1))"
- line 413, "pan.___", state 503, "((i>=1))"
- line 420, "pan.___", state 509, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 511, "(1)"
- line 420, "pan.___", state 512, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 512, "else"
- line 420, "pan.___", state 515, "(1)"
- line 420, "pan.___", state 516, "(1)"
- line 420, "pan.___", state 516, "(1)"
- line 424, "pan.___", state 523, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 525, "(1)"
- line 424, "pan.___", state 526, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 526, "else"
- line 424, "pan.___", state 529, "(1)"
- line 424, "pan.___", state 530, "(1)"
- line 424, "pan.___", state 530, "(1)"
- line 422, "pan.___", state 535, "((i<2))"
- line 422, "pan.___", state 535, "((i>=2))"
- line 249, "pan.___", state 541, "(1)"
- line 253, "pan.___", state 549, "(1)"
- line 253, "pan.___", state 550, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 550, "else"
- line 251, "pan.___", state 555, "((i<1))"
- line 251, "pan.___", state 555, "((i>=1))"
- line 257, "pan.___", state 561, "(1)"
- line 257, "pan.___", state 562, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 562, "else"
- line 261, "pan.___", state 569, "(1)"
- line 261, "pan.___", state 570, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 570, "else"
- line 259, "pan.___", state 575, "((i<2))"
- line 259, "pan.___", state 575, "((i>=2))"
- line 266, "pan.___", state 579, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 579, "else"
- line 431, "pan.___", state 581, "(1)"
- line 431, "pan.___", state 581, "(1)"
- line 700, "pan.___", state 584, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 700, "pan.___", state 585, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 700, "pan.___", state 586, "(1)"
- line 411, "pan.___", state 593, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 625, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 639, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 657, "(1)"
- line 257, "pan.___", state 677, "(1)"
- line 261, "pan.___", state 685, "(1)"
- line 411, "pan.___", state 711, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 743, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 757, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 775, "(1)"
- line 257, "pan.___", state 795, "(1)"
- line 261, "pan.___", state 803, "(1)"
- line 411, "pan.___", state 822, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 824, "(1)"
- line 411, "pan.___", state 825, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 825, "else"
- line 411, "pan.___", state 828, "(1)"
- line 415, "pan.___", state 836, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 838, "(1)"
- line 415, "pan.___", state 839, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 839, "else"
- line 415, "pan.___", state 842, "(1)"
- line 415, "pan.___", state 843, "(1)"
- line 415, "pan.___", state 843, "(1)"
- line 413, "pan.___", state 848, "((i<1))"
- line 413, "pan.___", state 848, "((i>=1))"
- line 420, "pan.___", state 854, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 856, "(1)"
- line 420, "pan.___", state 857, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 857, "else"
- line 420, "pan.___", state 860, "(1)"
- line 420, "pan.___", state 861, "(1)"
- line 420, "pan.___", state 861, "(1)"
- line 424, "pan.___", state 868, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 870, "(1)"
- line 424, "pan.___", state 871, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 871, "else"
- line 424, "pan.___", state 874, "(1)"
- line 424, "pan.___", state 875, "(1)"
- line 424, "pan.___", state 875, "(1)"
- line 422, "pan.___", state 880, "((i<2))"
- line 422, "pan.___", state 880, "((i>=2))"
- line 249, "pan.___", state 886, "(1)"
- line 253, "pan.___", state 894, "(1)"
- line 253, "pan.___", state 895, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 895, "else"
- line 251, "pan.___", state 900, "((i<1))"
- line 251, "pan.___", state 900, "((i>=1))"
- line 257, "pan.___", state 906, "(1)"
- line 257, "pan.___", state 907, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 907, "else"
- line 261, "pan.___", state 914, "(1)"
- line 261, "pan.___", state 915, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 915, "else"
- line 259, "pan.___", state 920, "((i<2))"
- line 259, "pan.___", state 920, "((i>=2))"
- line 266, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 924, "else"
- line 431, "pan.___", state 926, "(1)"
- line 431, "pan.___", state 926, "(1)"
- line 708, "pan.___", state 930, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 935, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 967, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 981, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 999, "(1)"
- line 257, "pan.___", state 1019, "(1)"
- line 261, "pan.___", state 1027, "(1)"
- line 411, "pan.___", state 1049, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1081, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1095, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1113, "(1)"
- line 257, "pan.___", state 1133, "(1)"
- line 261, "pan.___", state 1141, "(1)"
- line 411, "pan.___", state 1164, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1196, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1210, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1228, "(1)"
- line 257, "pan.___", state 1248, "(1)"
- line 261, "pan.___", state 1256, "(1)"
- line 411, "pan.___", state 1275, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1307, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1321, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1339, "(1)"
- line 257, "pan.___", state 1359, "(1)"
- line 261, "pan.___", state 1367, "(1)"
- line 411, "pan.___", state 1391, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1423, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1437, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1455, "(1)"
- line 257, "pan.___", state 1475, "(1)"
- line 261, "pan.___", state 1483, "(1)"
- line 411, "pan.___", state 1502, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1534, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1548, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1566, "(1)"
- line 257, "pan.___", state 1586, "(1)"
- line 261, "pan.___", state 1594, "(1)"
- line 411, "pan.___", state 1616, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1648, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1662, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1680, "(1)"
- line 257, "pan.___", state 1700, "(1)"
- line 261, "pan.___", state 1708, "(1)"
- line 747, "pan.___", state 1727, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1734, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1766, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1780, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1798, "(1)"
- line 257, "pan.___", state 1818, "(1)"
- line 261, "pan.___", state 1826, "(1)"
- line 411, "pan.___", state 1845, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1877, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1891, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1909, "(1)"
- line 257, "pan.___", state 1929, "(1)"
- line 261, "pan.___", state 1937, "(1)"
- line 411, "pan.___", state 1958, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 1960, "(1)"
- line 411, "pan.___", state 1961, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 1961, "else"
- line 411, "pan.___", state 1964, "(1)"
- line 415, "pan.___", state 1972, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1974, "(1)"
- line 415, "pan.___", state 1975, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 1975, "else"
- line 415, "pan.___", state 1978, "(1)"
- line 415, "pan.___", state 1979, "(1)"
- line 415, "pan.___", state 1979, "(1)"
- line 413, "pan.___", state 1984, "((i<1))"
- line 413, "pan.___", state 1984, "((i>=1))"
- line 420, "pan.___", state 1990, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1992, "(1)"
- line 420, "pan.___", state 1993, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 1993, "else"
- line 420, "pan.___", state 1996, "(1)"
- line 420, "pan.___", state 1997, "(1)"
- line 420, "pan.___", state 1997, "(1)"
- line 424, "pan.___", state 2004, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2006, "(1)"
- line 424, "pan.___", state 2007, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2007, "else"
- line 424, "pan.___", state 2010, "(1)"
- line 424, "pan.___", state 2011, "(1)"
- line 424, "pan.___", state 2011, "(1)"
- line 422, "pan.___", state 2016, "((i<2))"
- line 422, "pan.___", state 2016, "((i>=2))"
- line 249, "pan.___", state 2022, "(1)"
- line 253, "pan.___", state 2030, "(1)"
- line 253, "pan.___", state 2031, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2031, "else"
- line 251, "pan.___", state 2036, "((i<1))"
- line 251, "pan.___", state 2036, "((i>=1))"
- line 257, "pan.___", state 2042, "(1)"
- line 257, "pan.___", state 2043, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2043, "else"
- line 261, "pan.___", state 2050, "(1)"
- line 261, "pan.___", state 2051, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2051, "else"
- line 259, "pan.___", state 2056, "((i<2))"
- line 259, "pan.___", state 2056, "((i>=2))"
- line 266, "pan.___", state 2060, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2060, "else"
- line 431, "pan.___", state 2062, "(1)"
- line 431, "pan.___", state 2062, "(1)"
- line 747, "pan.___", state 2065, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 747, "pan.___", state 2066, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 747, "pan.___", state 2067, "(1)"
- line 411, "pan.___", state 2074, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2106, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2120, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2138, "(1)"
- line 257, "pan.___", state 2158, "(1)"
- line 261, "pan.___", state 2166, "(1)"
- line 411, "pan.___", state 2191, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2223, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2237, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2255, "(1)"
- line 257, "pan.___", state 2275, "(1)"
- line 261, "pan.___", state 2283, "(1)"
- line 411, "pan.___", state 2302, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2334, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2348, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2366, "(1)"
- line 257, "pan.___", state 2386, "(1)"
- line 261, "pan.___", state 2394, "(1)"
- line 249, "pan.___", state 2425, "(1)"
- line 257, "pan.___", state 2445, "(1)"
- line 261, "pan.___", state 2453, "(1)"
- line 249, "pan.___", state 2468, "(1)"
- line 257, "pan.___", state 2488, "(1)"
- line 261, "pan.___", state 2496, "(1)"
- line 898, "pan.___", state 2513, "-end-"
- (221 of 2513 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 20, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 26, "(1)"
- line 415, "pan.___", state 34, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 40, "(1)"
- line 415, "pan.___", state 41, "(1)"
- line 415, "pan.___", state 41, "(1)"
- line 413, "pan.___", state 46, "((i<1))"
- line 413, "pan.___", state 46, "((i>=1))"
- line 420, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 58, "(1)"
- line 420, "pan.___", state 59, "(1)"
- line 420, "pan.___", state 59, "(1)"
- line 424, "pan.___", state 72, "(1)"
- line 424, "pan.___", state 73, "(1)"
- line 424, "pan.___", state 73, "(1)"
- line 422, "pan.___", state 78, "((i<2))"
- line 422, "pan.___", state 78, "((i>=2))"
- line 249, "pan.___", state 84, "(1)"
- line 253, "pan.___", state 92, "(1)"
- line 253, "pan.___", state 93, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 93, "else"
- line 251, "pan.___", state 98, "((i<1))"
- line 251, "pan.___", state 98, "((i>=1))"
- line 257, "pan.___", state 104, "(1)"
- line 257, "pan.___", state 105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 105, "else"
- line 261, "pan.___", state 112, "(1)"
- line 261, "pan.___", state 113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 113, "else"
- line 259, "pan.___", state 118, "((i<2))"
- line 259, "pan.___", state 118, "((i>=2))"
- line 266, "pan.___", state 122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 122, "else"
- line 431, "pan.___", state 124, "(1)"
- line 431, "pan.___", state 124, "(1)"
- line 272, "pan.___", state 133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 142, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 274, "pan.___", state 150, "((i<1))"
- line 274, "pan.___", state 150, "((i>=1))"
- line 280, "pan.___", state 155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 1021, "pan.___", state 183, "old_data = cached_rcu_ptr.val[_pid]"
- line 1032, "pan.___", state 187, "_proc_urcu_writer = (_proc_urcu_writer|(1<<4))"
- line 411, "pan.___", state 195, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 201, "(1)"
- line 415, "pan.___", state 209, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 215, "(1)"
- line 415, "pan.___", state 216, "(1)"
- line 415, "pan.___", state 216, "(1)"
- line 420, "pan.___", state 229, "(1)"
- line 424, "pan.___", state 241, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 259, "(1)"
- line 253, "pan.___", state 267, "(1)"
- line 261, "pan.___", state 287, "(1)"
- line 431, "pan.___", state 299, "(1)"
- line 431, "pan.___", state 299, "(1)"
- line 415, "pan.___", state 322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 380, "(1)"
- line 261, "pan.___", state 400, "(1)"
- line 415, "pan.___", state 443, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 501, "(1)"
- line 415, "pan.___", state 554, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 612, "(1)"
- line 415, "pan.___", state 667, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 699, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 725, "(1)"
- line 261, "pan.___", state 745, "(1)"
- line 1168, "pan.___", state 770, "_proc_urcu_writer = (_proc_urcu_writer|(1<<13))"
- line 272, "pan.___", state 798, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 800, "(1)"
- line 276, "pan.___", state 807, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 809, "(1)"
- line 276, "pan.___", state 810, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 810, "else"
- line 274, "pan.___", state 815, "((i<1))"
- line 274, "pan.___", state 815, "((i>=1))"
- line 280, "pan.___", state 820, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 822, "(1)"
- line 280, "pan.___", state 823, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 823, "else"
- line 284, "pan.___", state 829, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 831, "(1)"
- line 284, "pan.___", state 832, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 832, "else"
- line 282, "pan.___", state 837, "((i<2))"
- line 282, "pan.___", state 837, "((i>=2))"
- line 249, "pan.___", state 845, "(1)"
- line 253, "pan.___", state 853, "(1)"
- line 253, "pan.___", state 854, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 854, "else"
- line 251, "pan.___", state 859, "((i<1))"
- line 251, "pan.___", state 859, "((i>=1))"
- line 257, "pan.___", state 865, "(1)"
- line 257, "pan.___", state 866, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 866, "else"
- line 261, "pan.___", state 873, "(1)"
- line 261, "pan.___", state 874, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 874, "else"
- line 266, "pan.___", state 883, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 883, "else"
- line 1222, "pan.___", state 899, "((i<1))"
- line 1222, "pan.___", state 899, "((i>=1))"
- line 272, "pan.___", state 904, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 906, "(1)"
- line 276, "pan.___", state 913, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 915, "(1)"
- line 276, "pan.___", state 916, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 916, "else"
- line 274, "pan.___", state 921, "((i<1))"
- line 274, "pan.___", state 921, "((i>=1))"
- line 280, "pan.___", state 926, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 928, "(1)"
- line 280, "pan.___", state 929, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 929, "else"
- line 284, "pan.___", state 935, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 937, "(1)"
- line 284, "pan.___", state 938, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 938, "else"
- line 282, "pan.___", state 943, "((i<2))"
- line 282, "pan.___", state 943, "((i>=2))"
- line 249, "pan.___", state 951, "(1)"
- line 253, "pan.___", state 959, "(1)"
- line 253, "pan.___", state 960, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 960, "else"
- line 251, "pan.___", state 965, "((i<1))"
- line 251, "pan.___", state 965, "((i>=1))"
- line 257, "pan.___", state 971, "(1)"
- line 257, "pan.___", state 972, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 972, "else"
- line 261, "pan.___", state 979, "(1)"
- line 261, "pan.___", state 980, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 980, "else"
- line 266, "pan.___", state 989, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 989, "else"
- line 299, "pan.___", state 991, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 991, "else"
- line 1222, "pan.___", state 992, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 1222, "pan.___", state 992, "else"
- line 276, "pan.___", state 1005, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1018, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1027, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1043, "(1)"
- line 253, "pan.___", state 1051, "(1)"
- line 257, "pan.___", state 1063, "(1)"
- line 261, "pan.___", state 1071, "(1)"
- line 272, "pan.___", state 1102, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1111, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1124, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1133, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1149, "(1)"
- line 253, "pan.___", state 1157, "(1)"
- line 257, "pan.___", state 1169, "(1)"
- line 261, "pan.___", state 1177, "(1)"
- line 276, "pan.___", state 1203, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1225, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1241, "(1)"
- line 253, "pan.___", state 1249, "(1)"
- line 257, "pan.___", state 1261, "(1)"
- line 261, "pan.___", state 1269, "(1)"
- line 272, "pan.___", state 1300, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1309, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1322, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1331, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1347, "(1)"
- line 253, "pan.___", state 1355, "(1)"
- line 257, "pan.___", state 1367, "(1)"
- line 261, "pan.___", state 1375, "(1)"
- line 272, "pan.___", state 1392, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1394, "(1)"
- line 276, "pan.___", state 1401, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1403, "(1)"
- line 276, "pan.___", state 1404, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1404, "else"
- line 274, "pan.___", state 1409, "((i<1))"
- line 274, "pan.___", state 1409, "((i>=1))"
- line 280, "pan.___", state 1414, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1416, "(1)"
- line 280, "pan.___", state 1417, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1417, "else"
- line 284, "pan.___", state 1423, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1425, "(1)"
- line 284, "pan.___", state 1426, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1426, "else"
- line 282, "pan.___", state 1431, "((i<2))"
- line 282, "pan.___", state 1431, "((i>=2))"
- line 249, "pan.___", state 1439, "(1)"
- line 253, "pan.___", state 1447, "(1)"
- line 253, "pan.___", state 1448, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1448, "else"
- line 251, "pan.___", state 1453, "((i<1))"
- line 251, "pan.___", state 1453, "((i>=1))"
- line 257, "pan.___", state 1459, "(1)"
- line 257, "pan.___", state 1460, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1460, "else"
- line 261, "pan.___", state 1467, "(1)"
- line 261, "pan.___", state 1468, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1468, "else"
- line 266, "pan.___", state 1477, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1477, "else"
- line 1233, "pan.___", state 1480, "i = 0"
- line 1233, "pan.___", state 1482, "reader_barrier = 1"
- line 1233, "pan.___", state 1493, "((i<1))"
- line 1233, "pan.___", state 1493, "((i>=1))"
- line 272, "pan.___", state 1498, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1500, "(1)"
- line 276, "pan.___", state 1507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1509, "(1)"
- line 276, "pan.___", state 1510, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1510, "else"
- line 274, "pan.___", state 1515, "((i<1))"
- line 274, "pan.___", state 1515, "((i>=1))"
- line 280, "pan.___", state 1520, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1522, "(1)"
- line 280, "pan.___", state 1523, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1523, "else"
- line 284, "pan.___", state 1529, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1531, "(1)"
- line 284, "pan.___", state 1532, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1532, "else"
- line 282, "pan.___", state 1537, "((i<2))"
- line 282, "pan.___", state 1537, "((i>=2))"
- line 249, "pan.___", state 1545, "(1)"
- line 253, "pan.___", state 1553, "(1)"
- line 253, "pan.___", state 1554, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1554, "else"
- line 251, "pan.___", state 1559, "((i<1))"
- line 251, "pan.___", state 1559, "((i>=1))"
- line 257, "pan.___", state 1565, "(1)"
- line 257, "pan.___", state 1566, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1566, "else"
- line 261, "pan.___", state 1573, "(1)"
- line 261, "pan.___", state 1574, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1574, "else"
- line 266, "pan.___", state 1583, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1583, "else"
- line 299, "pan.___", state 1585, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1585, "else"
- line 1233, "pan.___", state 1586, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 1233, "pan.___", state 1586, "else"
- line 1237, "pan.___", state 1589, "-end-"
- (179 of 1589 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 241 seconds
-pan: rate 33888.985 states/second
-pan: avg transition delay 2.673e-06 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
+++ /dev/null
-#define NO_MB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4182
-2:3:4102
-3:3:4105
-4:3:4105
-5:3:4108
-6:3:4116
-7:3:4116
-8:3:4119
-9:3:4125
-10:3:4129
-11:3:4129
-12:3:4132
-13:3:4142
-14:3:4150
-15:3:4150
-16:3:4153
-17:3:4159
-18:3:4163
-19:3:4163
-20:3:4166
-21:3:4172
-22:3:4176
-23:3:4177
-24:0:4182
-25:3:4179
-26:0:4182
-27:2:2515
-28:0:4182
-29:2:2521
-30:0:4182
-31:2:2522
-32:0:4182
-33:2:2524
-34:0:4182
-35:2:2525
-36:0:4182
-37:2:2526
-38:0:4182
-39:2:2527
-40:0:4182
-41:2:2528
-42:2:2529
-43:2:2533
-44:2:2534
-45:2:2542
-46:2:2543
-47:2:2547
-48:2:2548
-49:2:2556
-50:2:2561
-51:2:2565
-52:2:2566
-53:2:2574
-54:2:2575
-55:2:2579
-56:2:2580
-57:2:2574
-58:2:2575
-59:2:2579
-60:2:2580
-61:2:2588
-62:2:2593
-63:2:2600
-64:2:2601
-65:2:2608
-66:2:2613
-67:2:2620
-68:2:2621
-69:2:2620
-70:2:2621
-71:2:2628
-72:2:2638
-73:0:4182
-74:2:2527
-75:0:4182
-76:2:2642
-77:2:2646
-78:2:2647
-79:2:2651
-80:2:2655
-81:2:2656
-82:2:2660
-83:2:2668
-84:2:2669
-85:2:2673
-86:2:2677
-87:2:2678
-88:2:2673
-89:2:2674
-90:2:2682
-91:0:4182
-92:2:2527
-93:0:4182
-94:2:2690
-95:2:2691
-96:2:2692
-97:0:4182
-98:2:2527
-99:0:4182
-100:2:2700
-101:0:4182
-102:2:2527
-103:0:4182
-104:2:2703
-105:2:2704
-106:2:2708
-107:2:2709
-108:2:2717
-109:2:2718
-110:2:2722
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-112:2:2731
-113:2:2736
-114:2:2737
-115:2:2749
-116:2:2750
-117:2:2754
-118:2:2755
-119:2:2749
-120:2:2750
-121:2:2754
-122:2:2755
-123:2:2763
-124:2:2768
-125:2:2775
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-127:2:2783
-128:2:2788
-129:2:2795
-130:2:2796
-131:2:2795
-132:2:2796
-133:2:2803
-134:2:2812
-135:0:4182
-136:2:2527
-137:0:4182
-138:2:2816
-139:2:2817
-140:2:2818
-141:2:2830
-142:2:2831
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-144:2:2836
-145:2:2844
-146:2:2849
-147:2:2853
-148:2:2854
-149:2:2862
-150:2:2863
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-152:2:2868
-153:2:2862
-154:2:2863
-155:2:2867
-156:2:2868
-157:2:2876
-158:2:2881
-159:2:2888
-160:2:2889
-161:2:2896
-162:2:2901
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-164:2:2909
-165:2:2908
-166:2:2909
-167:2:2916
-168:2:2929
-169:2:2930
-170:0:4182
-171:2:2527
-172:0:4182
-173:2:2937
-174:2:2938
-175:2:2942
-176:2:2943
-177:2:2951
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-179:2:2956
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-181:2:2965
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-183:2:2974
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-187:2:2988
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-189:2:2983
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-193:2:2997
-194:2:3002
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-196:2:3010
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-198:2:3022
-199:2:3029
-200:2:3030
-201:2:3029
-202:2:3030
-203:2:3037
-204:0:4182
-205:2:2527
-206:0:4182
-207:2:3048
-208:2:3049
-209:2:3053
-210:2:3054
-211:2:3062
-212:2:3063
-213:2:3067
-214:2:3068
-215:2:3076
-216:2:3081
-217:2:3085
-218:2:3086
-219:2:3094
-220:2:3095
-221:2:3099
-222:2:3100
-223:2:3094
-224:2:3095
-225:2:3099
-226:2:3100
-227:2:3108
-228:2:3113
-229:2:3120
-230:2:3121
-231:2:3128
-232:2:3133
-233:2:3140
-234:2:3141
-235:2:3140
-236:2:3141
-237:2:3148
-238:2:3157
-239:0:4182
-240:2:2527
-241:0:4182
-242:2:3161
-243:2:3162
-244:2:3163
-245:2:3175
-246:2:3176
-247:2:3180
-248:2:3181
-249:2:3189
-250:2:3194
-251:2:3198
-252:2:3199
-253:2:3207
-254:2:3208
-255:2:3212
-256:2:3213
-257:2:3207
-258:2:3208
-259:2:3212
-260:2:3213
-261:2:3221
-262:2:3226
-263:2:3233
-264:2:3234
-265:2:3241
-266:2:3246
-267:2:3253
-268:2:3254
-269:2:3253
-270:2:3254
-271:2:3261
-272:2:3273
-273:2:3274
-274:0:4182
-275:2:2527
-276:0:4182
-277:2:3283
-278:2:3284
-279:0:4182
-280:2:2527
-281:0:4182
-282:2:3288
-283:0:4182
-284:2:3296
-285:0:4182
-286:2:2522
-287:0:4182
-288:2:2524
-289:0:4182
-290:2:2525
-291:0:4182
-292:2:2526
-293:0:4182
-294:2:2527
-295:0:4182
-296:2:2528
-297:2:2529
-298:2:2533
-299:2:2534
-300:2:2542
-301:2:2543
-302:2:2547
-303:2:2548
-304:2:2556
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-306:2:2565
-307:2:2566
-308:2:2574
-309:2:2575
-310:2:2576
-311:2:2574
-312:2:2575
-313:2:2579
-314:2:2580
-315:2:2588
-316:2:2593
-317:2:2600
-318:2:2601
-319:2:2608
-320:2:2613
-321:2:2620
-322:2:2621
-323:2:2620
-324:2:2621
-325:2:2628
-326:2:2638
-327:0:4182
-328:2:2527
-329:0:4182
-330:2:2642
-331:2:2646
-332:2:2647
-333:2:2651
-334:2:2655
-335:2:2656
-336:2:2660
-337:2:2668
-338:2:2669
-339:2:2673
-340:2:2674
-341:2:2673
-342:2:2677
-343:2:2678
-344:2:2682
-345:0:4182
-346:2:2527
-347:0:4182
-348:2:2690
-349:2:2691
-350:2:2692
-351:0:4182
-352:2:2527
-353:0:4182
-354:2:2700
-355:0:4182
-356:2:2527
-357:0:4182
-358:2:2703
-359:2:2704
-360:2:2708
-361:2:2709
-362:2:2717
-363:2:2718
-364:2:2722
-365:2:2723
-366:2:2731
-367:2:2736
-368:2:2737
-369:2:2749
-370:2:2750
-371:2:2754
-372:2:2755
-373:2:2749
-374:2:2750
-375:2:2754
-376:2:2755
-377:2:2763
-378:2:2768
-379:2:2775
-380:2:2776
-381:2:2783
-382:2:2788
-383:2:2795
-384:2:2796
-385:2:2795
-386:2:2796
-387:2:2803
-388:2:2812
-389:0:4182
-390:2:2527
-391:0:4182
-392:2:2816
-393:2:2817
-394:2:2818
-395:2:2830
-396:2:2831
-397:2:2835
-398:2:2836
-399:2:2844
-400:2:2849
-401:2:2853
-402:2:2854
-403:2:2862
-404:2:2863
-405:2:2867
-406:2:2868
-407:2:2862
-408:2:2863
-409:2:2867
-410:2:2868
-411:2:2876
-412:2:2881
-413:2:2888
-414:2:2889
-415:2:2896
-416:2:2901
-417:2:2908
-418:2:2909
-419:2:2908
-420:2:2909
-421:2:2916
-422:2:2929
-423:2:2930
-424:0:4182
-425:2:2527
-426:0:4182
-427:2:2937
-428:2:2938
-429:2:2942
-430:2:2943
-431:2:2951
-432:2:2952
-433:2:2956
-434:2:2957
-435:2:2965
-436:2:2970
-437:2:2974
-438:2:2975
-439:2:2983
-440:2:2984
-441:2:2988
-442:2:2989
-443:2:2983
-444:2:2984
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-1332:0:4182
-1333:1:23
-1334:0:4182
-1335:2:3303
-1336:0:4182
-1337:1:1155
-1338:0:4182
-1339:2:3302
-1340:0:4182
-1341:1:2421
-1342:1:2428
-1343:1:2429
-1344:1:2436
-1345:1:2441
-1346:1:2448
-1347:1:2449
-1348:1:2448
-1349:1:2449
-1350:1:2456
-1351:1:2460
-1352:0:4182
-1353:2:3303
-1354:0:4182
-1355:1:1157
-1356:1:1158
-1357:0:4180
-1358:2:3302
-1359:0:4186
-1360:1:2169
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 9420 States= 1e+06 Transitions= 7.12e+06 Memory= 550.432 t= 17.7 R= 6e+04
-Depth= 9420 States= 2e+06 Transitions= 1.53e+07 Memory= 634.318 t= 38.9 R= 5e+04
-Depth= 9420 States= 3e+06 Transitions= 2.54e+07 Memory= 718.303 t= 66.3 R= 5e+04
-pan: resizing hashtable to -w22.. done
-Depth= 9420 States= 4e+06 Transitions= 3.3e+07 Memory= 833.311 t= 86.1 R= 5e+04
-Depth= 9420 States= 5e+06 Transitions= 4.08e+07 Memory= 917.295 t= 106 R= 5e+04
-Depth= 9420 States= 6e+06 Transitions= 5.88e+07 Memory= 1001.279 t= 157 R= 4e+04
-Depth= 9420 States= 7e+06 Transitions= 7.01e+07 Memory= 1085.264 t= 187 R= 4e+04
-Depth= 9420 States= 8e+06 Transitions= 8.44e+07 Memory= 1169.151 t= 227 R= 4e+04
-Depth= 9420 States= 9e+06 Transitions= 9.77e+07 Memory= 1253.135 t= 264 R= 3e+04
-pan: resizing hashtable to -w24.. done
-Depth= 9420 States= 1e+07 Transitions= 1.11e+08 Memory= 1461.115 t= 302 R= 3e+04
-Depth= 9420 States= 1.1e+07 Transitions= 1.24e+08 Memory= 1545.100 t= 336 R= 3e+04
-Depth= 9420 States= 1.2e+07 Transitions= 1.33e+08 Memory= 1629.084 t= 362 R= 3e+04
-Depth= 9420 States= 1.3e+07 Transitions= 1.46e+08 Memory= 1713.068 t= 397 R= 3e+04
-Depth= 9420 States= 1.4e+07 Transitions= 1.76e+08 Memory= 1797.053 t= 485 R= 3e+04
-Depth= 9420 States= 1.5e+07 Transitions= 1.95e+08 Memory= 1881.037 t= 540 R= 3e+04
-Depth= 9420 States= 1.6e+07 Transitions= 2.12e+08 Memory= 1964.924 t= 587 R= 3e+04
-Depth= 9420 States= 1.7e+07 Transitions= 2.25e+08 Memory= 2048.908 t= 622 R= 3e+04
-Depth= 9420 States= 1.8e+07 Transitions= 2.44e+08 Memory= 2132.893 t= 676 R= 3e+04
-Depth= 9420 States= 1.9e+07 Transitions= 2.6e+08 Memory= 2216.877 t= 721 R= 3e+04
-Depth= 9420 States= 2e+07 Transitions= 2.78e+08 Memory= 2300.861 t= 771 R= 3e+04
-Depth= 9522 States= 2.1e+07 Transitions= 2.91e+08 Memory= 2384.846 t= 808 R= 3e+04
-Depth= 9542 States= 2.2e+07 Transitions= 3.05e+08 Memory= 2468.830 t= 847 R= 3e+04
-Depth= 9542 States= 2.3e+07 Transitions= 3.16e+08 Memory= 2552.717 t= 878 R= 3e+04
-Depth= 9542 States= 2.4e+07 Transitions= 3.28e+08 Memory= 2636.701 t= 910 R= 3e+04
-Depth= 9542 States= 2.5e+07 Transitions= 3.41e+08 Memory= 2720.686 t= 947 R= 3e+04
-Depth= 9542 States= 2.6e+07 Transitions= 3.53e+08 Memory= 2804.670 t= 979 R= 3e+04
-Depth= 9542 States= 2.7e+07 Transitions= 3.66e+08 Memory= 2888.654 t= 1.02e+03 R= 3e+04
-Depth= 9542 States= 2.8e+07 Transitions= 3.79e+08 Memory= 2972.639 t= 1.05e+03 R= 3e+04
-Depth= 9542 States= 2.9e+07 Transitions= 3.92e+08 Memory= 3056.526 t= 1.09e+03 R= 3e+04
-Depth= 9542 States= 3e+07 Transitions= 4.04e+08 Memory= 3140.510 t= 1.12e+03 R= 3e+04
-Depth= 9542 States= 3.1e+07 Transitions= 4.17e+08 Memory= 3224.494 t= 1.16e+03 R= 3e+04
-Depth= 9542 States= 3.2e+07 Transitions= 4.28e+08 Memory= 3308.479 t= 1.19e+03 R= 3e+04
-Depth= 9542 States= 3.3e+07 Transitions= 4.39e+08 Memory= 3392.463 t= 1.22e+03 R= 3e+04
-Depth= 9542 States= 3.4e+07 Transitions= 4.53e+08 Memory= 3476.447 t= 1.26e+03 R= 3e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9542 States= 3.5e+07 Transitions= 4.7e+08 Memory= 4056.416 t= 1.32e+03 R= 3e+04
-Depth= 9542 States= 3.6e+07 Transitions= 4.83e+08 Memory= 4140.401 t= 1.35e+03 R= 3e+04
-Depth= 9542 States= 3.7e+07 Transitions= 4.99e+08 Memory= 4224.385 t= 1.4e+03 R= 3e+04
-Depth= 9542 States= 3.8e+07 Transitions= 5.14e+08 Memory= 4308.369 t= 1.44e+03 R= 3e+04
-Depth= 9542 States= 3.9e+07 Transitions= 5.29e+08 Memory= 4392.354 t= 1.48e+03 R= 3e+04
-Depth= 9542 States= 4e+07 Transitions= 5.39e+08 Memory= 4476.338 t= 1.51e+03 R= 3e+04
-Depth= 9542 States= 4.1e+07 Transitions= 5.49e+08 Memory= 4560.225 t= 1.53e+03 R= 3e+04
-Depth= 9542 States= 4.2e+07 Transitions= 5.61e+08 Memory= 4644.209 t= 1.56e+03 R= 3e+04
-Depth= 9542 States= 4.3e+07 Transitions= 5.88e+08 Memory= 4728.193 t= 1.64e+03 R= 3e+04
-Depth= 9542 States= 4.4e+07 Transitions= 6.14e+08 Memory= 4812.178 t= 1.72e+03 R= 3e+04
-Depth= 9542 States= 4.5e+07 Transitions= 6.31e+08 Memory= 4896.162 t= 1.76e+03 R= 3e+04
-Depth= 9542 States= 4.6e+07 Transitions= 6.41e+08 Memory= 4980.147 t= 1.79e+03 R= 3e+04
-Depth= 9542 States= 4.7e+07 Transitions= 6.57e+08 Memory= 5064.131 t= 1.84e+03 R= 3e+04
-Depth= 9542 States= 4.8e+07 Transitions= 6.76e+08 Memory= 5148.018 t= 1.89e+03 R= 3e+04
-Depth= 9542 States= 4.9e+07 Transitions= 6.93e+08 Memory= 5232.002 t= 1.94e+03 R= 3e+04
-Depth= 9542 States= 5e+07 Transitions= 7.08e+08 Memory= 5315.986 t= 1.98e+03 R= 3e+04
-Depth= 9542 States= 5.1e+07 Transitions= 7.21e+08 Memory= 5399.971 t= 2.02e+03 R= 3e+04
-Depth= 9542 States= 5.2e+07 Transitions= 7.34e+08 Memory= 5483.955 t= 2.05e+03 R= 3e+04
-Depth= 9542 States= 5.3e+07 Transitions= 7.47e+08 Memory= 5567.940 t= 2.09e+03 R= 3e+04
-Depth= 9542 States= 5.4e+07 Transitions= 7.58e+08 Memory= 5651.826 t= 2.12e+03 R= 3e+04
-Depth= 9542 States= 5.5e+07 Transitions= 7.71e+08 Memory= 5735.811 t= 2.15e+03 R= 3e+04
-Depth= 9542 States= 5.6e+07 Transitions= 7.83e+08 Memory= 5819.795 t= 2.19e+03 R= 3e+04
-Depth= 9542 States= 5.7e+07 Transitions= 7.98e+08 Memory= 5903.779 t= 2.23e+03 R= 3e+04
-Depth= 9542 States= 5.8e+07 Transitions= 8.08e+08 Memory= 5987.764 t= 2.25e+03 R= 3e+04
-Depth= 9542 States= 5.9e+07 Transitions= 8.22e+08 Memory= 6071.748 t= 2.29e+03 R= 3e+04
-Depth= 9542 States= 6e+07 Transitions= 8.33e+08 Memory= 6155.733 t= 2.32e+03 R= 3e+04
-Depth= 9542 States= 6.1e+07 Transitions= 8.44e+08 Memory= 6239.619 t= 2.35e+03 R= 3e+04
-Depth= 9542 States= 6.2e+07 Transitions= 8.56e+08 Memory= 6323.604 t= 2.39e+03 R= 3e+04
-Depth= 9542 States= 6.3e+07 Transitions= 8.74e+08 Memory= 6407.588 t= 2.44e+03 R= 3e+04
-Depth= 9542 States= 6.4e+07 Transitions= 8.86e+08 Memory= 6491.572 t= 2.47e+03 R= 3e+04
-Depth= 9542 States= 6.5e+07 Transitions= 9.01e+08 Memory= 6575.557 t= 2.51e+03 R= 3e+04
-Depth= 9542 States= 6.6e+07 Transitions= 9.17e+08 Memory= 6659.541 t= 2.55e+03 R= 3e+04
-Depth= 9542 States= 6.7e+07 Transitions= 9.31e+08 Memory= 6743.428 t= 2.59e+03 R= 3e+04
-Depth= 9542 States= 6.8e+07 Transitions= 9.46e+08 Memory= 6827.412 t= 2.64e+03 R= 3e+04
-Depth= 9542 States= 6.9e+07 Transitions= 9.6e+08 Memory= 6911.397 t= 2.67e+03 R= 3e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 9542, errors: 0
- 69795266 states, stored
-9.0126381e+08 states, matched
-9.7105908e+08 transitions (= stored+matched)
-1.4943649e+10 atomic steps
-hash conflicts: 5.4028862e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7721.187 equivalent memory usage for states (stored*(State-vector + overhead))
- 6011.798 actual memory usage for states (compression: 77.86%)
- state-vector as stored = 62 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 3.368 memory lost to fragmentation
- 6978.193 total actual memory usage
-
-unreached in proctype urcu_reader
- line 272, "pan.___", state 30, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 61, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 77, "(1)"
- line 253, "pan.___", state 85, "(1)"
- line 257, "pan.___", state 97, "(1)"
- line 261, "pan.___", state 105, "(1)"
- line 411, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 163, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 177, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 195, "(1)"
- line 257, "pan.___", state 215, "(1)"
- line 261, "pan.___", state 223, "(1)"
- line 691, "pan.___", state 242, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 249, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 281, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 295, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 313, "(1)"
- line 257, "pan.___", state 333, "(1)"
- line 261, "pan.___", state 341, "(1)"
- line 411, "pan.___", state 360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 392, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 406, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 424, "(1)"
- line 257, "pan.___", state 444, "(1)"
- line 261, "pan.___", state 452, "(1)"
- line 411, "pan.___", state 473, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 475, "(1)"
- line 411, "pan.___", state 476, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 476, "else"
- line 411, "pan.___", state 479, "(1)"
- line 415, "pan.___", state 487, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 489, "(1)"
- line 415, "pan.___", state 490, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 490, "else"
- line 415, "pan.___", state 493, "(1)"
- line 415, "pan.___", state 494, "(1)"
- line 415, "pan.___", state 494, "(1)"
- line 413, "pan.___", state 499, "((i<1))"
- line 413, "pan.___", state 499, "((i>=1))"
- line 420, "pan.___", state 505, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 507, "(1)"
- line 420, "pan.___", state 508, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 508, "else"
- line 420, "pan.___", state 511, "(1)"
- line 420, "pan.___", state 512, "(1)"
- line 420, "pan.___", state 512, "(1)"
- line 424, "pan.___", state 519, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 521, "(1)"
- line 424, "pan.___", state 522, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 522, "else"
- line 424, "pan.___", state 525, "(1)"
- line 424, "pan.___", state 526, "(1)"
- line 424, "pan.___", state 526, "(1)"
- line 422, "pan.___", state 531, "((i<2))"
- line 422, "pan.___", state 531, "((i>=2))"
- line 249, "pan.___", state 537, "(1)"
- line 253, "pan.___", state 545, "(1)"
- line 253, "pan.___", state 546, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 546, "else"
- line 251, "pan.___", state 551, "((i<1))"
- line 251, "pan.___", state 551, "((i>=1))"
- line 257, "pan.___", state 557, "(1)"
- line 257, "pan.___", state 558, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 558, "else"
- line 261, "pan.___", state 565, "(1)"
- line 261, "pan.___", state 566, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 566, "else"
- line 259, "pan.___", state 571, "((i<2))"
- line 259, "pan.___", state 571, "((i>=2))"
- line 266, "pan.___", state 575, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 575, "else"
- line 431, "pan.___", state 577, "(1)"
- line 431, "pan.___", state 577, "(1)"
- line 691, "pan.___", state 580, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 691, "pan.___", state 581, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 691, "pan.___", state 582, "(1)"
- line 411, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 621, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 635, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 653, "(1)"
- line 257, "pan.___", state 673, "(1)"
- line 261, "pan.___", state 681, "(1)"
- line 411, "pan.___", state 707, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 739, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 753, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 771, "(1)"
- line 257, "pan.___", state 791, "(1)"
- line 261, "pan.___", state 799, "(1)"
- line 411, "pan.___", state 818, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 820, "(1)"
- line 411, "pan.___", state 821, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 821, "else"
- line 411, "pan.___", state 824, "(1)"
- line 415, "pan.___", state 832, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 834, "(1)"
- line 415, "pan.___", state 835, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 835, "else"
- line 415, "pan.___", state 838, "(1)"
- line 415, "pan.___", state 839, "(1)"
- line 415, "pan.___", state 839, "(1)"
- line 413, "pan.___", state 844, "((i<1))"
- line 413, "pan.___", state 844, "((i>=1))"
- line 420, "pan.___", state 850, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 852, "(1)"
- line 420, "pan.___", state 853, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 853, "else"
- line 420, "pan.___", state 856, "(1)"
- line 420, "pan.___", state 857, "(1)"
- line 420, "pan.___", state 857, "(1)"
- line 424, "pan.___", state 864, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 866, "(1)"
- line 424, "pan.___", state 867, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 867, "else"
- line 424, "pan.___", state 870, "(1)"
- line 424, "pan.___", state 871, "(1)"
- line 424, "pan.___", state 871, "(1)"
- line 422, "pan.___", state 876, "((i<2))"
- line 422, "pan.___", state 876, "((i>=2))"
- line 249, "pan.___", state 882, "(1)"
- line 253, "pan.___", state 890, "(1)"
- line 253, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 891, "else"
- line 251, "pan.___", state 896, "((i<1))"
- line 251, "pan.___", state 896, "((i>=1))"
- line 257, "pan.___", state 902, "(1)"
- line 257, "pan.___", state 903, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 903, "else"
- line 261, "pan.___", state 910, "(1)"
- line 261, "pan.___", state 911, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 911, "else"
- line 259, "pan.___", state 916, "((i<2))"
- line 259, "pan.___", state 916, "((i>=2))"
- line 266, "pan.___", state 920, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 920, "else"
- line 431, "pan.___", state 922, "(1)"
- line 431, "pan.___", state 922, "(1)"
- line 699, "pan.___", state 926, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 963, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 977, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 995, "(1)"
- line 257, "pan.___", state 1015, "(1)"
- line 261, "pan.___", state 1023, "(1)"
- line 411, "pan.___", state 1045, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1077, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1091, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1109, "(1)"
- line 257, "pan.___", state 1129, "(1)"
- line 261, "pan.___", state 1137, "(1)"
- line 411, "pan.___", state 1160, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1192, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1206, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1224, "(1)"
- line 257, "pan.___", state 1244, "(1)"
- line 261, "pan.___", state 1252, "(1)"
- line 411, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1303, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1317, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1335, "(1)"
- line 257, "pan.___", state 1355, "(1)"
- line 261, "pan.___", state 1363, "(1)"
- line 411, "pan.___", state 1387, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1419, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1433, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1451, "(1)"
- line 257, "pan.___", state 1471, "(1)"
- line 261, "pan.___", state 1479, "(1)"
- line 411, "pan.___", state 1498, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1530, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1544, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1562, "(1)"
- line 257, "pan.___", state 1582, "(1)"
- line 261, "pan.___", state 1590, "(1)"
- line 411, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1644, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1658, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1676, "(1)"
- line 257, "pan.___", state 1696, "(1)"
- line 261, "pan.___", state 1704, "(1)"
- line 738, "pan.___", state 1723, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1730, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1762, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1776, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1794, "(1)"
- line 257, "pan.___", state 1814, "(1)"
- line 261, "pan.___", state 1822, "(1)"
- line 411, "pan.___", state 1841, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1873, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1887, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1905, "(1)"
- line 257, "pan.___", state 1925, "(1)"
- line 261, "pan.___", state 1933, "(1)"
- line 411, "pan.___", state 1954, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 1956, "(1)"
- line 411, "pan.___", state 1957, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 1957, "else"
- line 411, "pan.___", state 1960, "(1)"
- line 415, "pan.___", state 1968, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1970, "(1)"
- line 415, "pan.___", state 1971, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 1971, "else"
- line 415, "pan.___", state 1974, "(1)"
- line 415, "pan.___", state 1975, "(1)"
- line 415, "pan.___", state 1975, "(1)"
- line 413, "pan.___", state 1980, "((i<1))"
- line 413, "pan.___", state 1980, "((i>=1))"
- line 420, "pan.___", state 1986, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1988, "(1)"
- line 420, "pan.___", state 1989, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 1989, "else"
- line 420, "pan.___", state 1992, "(1)"
- line 420, "pan.___", state 1993, "(1)"
- line 420, "pan.___", state 1993, "(1)"
- line 424, "pan.___", state 2000, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2002, "(1)"
- line 424, "pan.___", state 2003, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2003, "else"
- line 424, "pan.___", state 2006, "(1)"
- line 424, "pan.___", state 2007, "(1)"
- line 424, "pan.___", state 2007, "(1)"
- line 422, "pan.___", state 2012, "((i<2))"
- line 422, "pan.___", state 2012, "((i>=2))"
- line 249, "pan.___", state 2018, "(1)"
- line 253, "pan.___", state 2026, "(1)"
- line 253, "pan.___", state 2027, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2027, "else"
- line 251, "pan.___", state 2032, "((i<1))"
- line 251, "pan.___", state 2032, "((i>=1))"
- line 257, "pan.___", state 2038, "(1)"
- line 257, "pan.___", state 2039, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2039, "else"
- line 261, "pan.___", state 2046, "(1)"
- line 261, "pan.___", state 2047, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2047, "else"
- line 259, "pan.___", state 2052, "((i<2))"
- line 259, "pan.___", state 2052, "((i>=2))"
- line 266, "pan.___", state 2056, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2056, "else"
- line 431, "pan.___", state 2058, "(1)"
- line 431, "pan.___", state 2058, "(1)"
- line 738, "pan.___", state 2061, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 738, "pan.___", state 2062, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 738, "pan.___", state 2063, "(1)"
- line 411, "pan.___", state 2070, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2102, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2116, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2134, "(1)"
- line 257, "pan.___", state 2154, "(1)"
- line 261, "pan.___", state 2162, "(1)"
- line 411, "pan.___", state 2187, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2219, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2233, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2251, "(1)"
- line 257, "pan.___", state 2271, "(1)"
- line 261, "pan.___", state 2279, "(1)"
- line 411, "pan.___", state 2298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2362, "(1)"
- line 257, "pan.___", state 2382, "(1)"
- line 261, "pan.___", state 2390, "(1)"
- line 411, "pan.___", state 2421, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2453, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2467, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2485, "(1)"
- line 257, "pan.___", state 2505, "(1)"
- line 261, "pan.___", state 2513, "(1)"
- line 411, "pan.___", state 2530, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2562, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2576, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2594, "(1)"
- line 257, "pan.___", state 2614, "(1)"
- line 261, "pan.___", state 2622, "(1)"
- line 898, "pan.___", state 2641, "-end-"
- (227 of 2641 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 82, "(1)"
- line 253, "pan.___", state 90, "(1)"
- line 257, "pan.___", state 102, "(1)"
- line 272, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 257, "(1)"
- line 253, "pan.___", state 265, "(1)"
- line 257, "pan.___", state 277, "(1)"
- line 261, "pan.___", state 285, "(1)"
- line 415, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 378, "(1)"
- line 257, "pan.___", state 390, "(1)"
- line 261, "pan.___", state 398, "(1)"
- line 415, "pan.___", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 499, "(1)"
- line 257, "pan.___", state 511, "(1)"
- line 261, "pan.___", state 519, "(1)"
- line 415, "pan.___", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 610, "(1)"
- line 257, "pan.___", state 622, "(1)"
- line 261, "pan.___", state 630, "(1)"
- line 415, "pan.___", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 723, "(1)"
- line 257, "pan.___", state 735, "(1)"
- line 261, "pan.___", state 743, "(1)"
- line 272, "pan.___", state 796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 805, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 820, "(1)"
- line 284, "pan.___", state 827, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 843, "(1)"
- line 253, "pan.___", state 851, "(1)"
- line 257, "pan.___", state 863, "(1)"
- line 261, "pan.___", state 871, "(1)"
- line 272, "pan.___", state 902, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 911, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 924, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 933, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 949, "(1)"
- line 253, "pan.___", state 957, "(1)"
- line 257, "pan.___", state 969, "(1)"
- line 261, "pan.___", state 977, "(1)"
- line 276, "pan.___", state 1003, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1016, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1025, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1041, "(1)"
- line 253, "pan.___", state 1049, "(1)"
- line 257, "pan.___", state 1061, "(1)"
- line 261, "pan.___", state 1069, "(1)"
- line 272, "pan.___", state 1100, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1109, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1122, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1131, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1147, "(1)"
- line 253, "pan.___", state 1155, "(1)"
- line 257, "pan.___", state 1167, "(1)"
- line 261, "pan.___", state 1175, "(1)"
- line 276, "pan.___", state 1201, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1214, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1223, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1239, "(1)"
- line 253, "pan.___", state 1247, "(1)"
- line 257, "pan.___", state 1259, "(1)"
- line 261, "pan.___", state 1267, "(1)"
- line 272, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1307, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1320, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1329, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1345, "(1)"
- line 253, "pan.___", state 1353, "(1)"
- line 257, "pan.___", state 1365, "(1)"
- line 261, "pan.___", state 1373, "(1)"
- line 276, "pan.___", state 1399, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1412, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1421, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1437, "(1)"
- line 253, "pan.___", state 1445, "(1)"
- line 257, "pan.___", state 1457, "(1)"
- line 261, "pan.___", state 1465, "(1)"
- line 272, "pan.___", state 1496, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1505, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1518, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1527, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1543, "(1)"
- line 253, "pan.___", state 1551, "(1)"
- line 257, "pan.___", state 1563, "(1)"
- line 261, "pan.___", state 1571, "(1)"
- line 1237, "pan.___", state 1587, "-end-"
- (103 of 1587 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 2.7e+03 seconds
-pan: rate 25814.341 states/second
-pan: avg transition delay 2.7843e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
+++ /dev/null
-#define NO_RMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 9172 States= 1e+06 Transitions= 6.87e+06 Memory= 550.432 t= 17 R= 6e+04
-Depth= 9172 States= 2e+06 Transitions= 1.47e+07 Memory= 634.318 t= 37.6 R= 5e+04
-Depth= 9172 States= 3e+06 Transitions= 2.46e+07 Memory= 718.303 t= 64.2 R= 5e+04
-pan: resizing hashtable to -w22.. done
-Depth= 9172 States= 4e+06 Transitions= 3.19e+07 Memory= 833.311 t= 83.2 R= 5e+04
-Depth= 9172 States= 5e+06 Transitions= 3.95e+07 Memory= 917.295 t= 103 R= 5e+04
-Depth= 9172 States= 6e+06 Transitions= 5.71e+07 Memory= 1001.279 t= 152 R= 4e+04
-Depth= 9172 States= 7e+06 Transitions= 6.81e+07 Memory= 1085.264 t= 182 R= 4e+04
-Depth= 9172 States= 8e+06 Transitions= 8.22e+07 Memory= 1169.151 t= 221 R= 4e+04
-Depth= 9172 States= 9e+06 Transitions= 9.54e+07 Memory= 1253.135 t= 258 R= 3e+04
-pan: resizing hashtable to -w24.. done
-Depth= 9172 States= 1e+07 Transitions= 1.08e+08 Memory= 1461.115 t= 295 R= 3e+04
-Depth= 9172 States= 1.1e+07 Transitions= 1.2e+08 Memory= 1545.100 t= 327 R= 3e+04
-Depth= 9172 States= 1.2e+07 Transitions= 1.27e+08 Memory= 1629.084 t= 344 R= 3e+04
-Depth= 9172 States= 1.3e+07 Transitions= 1.35e+08 Memory= 1713.068 t= 365 R= 4e+04
-Depth= 9172 States= 1.4e+07 Transitions= 1.46e+08 Memory= 1797.053 t= 394 R= 4e+04
-Depth= 9172 States= 1.5e+07 Transitions= 1.53e+08 Memory= 1881.037 t= 413 R= 4e+04
-Depth= 9172 States= 1.6e+07 Transitions= 1.6e+08 Memory= 1964.924 t= 432 R= 4e+04
-Depth= 9172 States= 1.7e+07 Transitions= 1.76e+08 Memory= 2048.908 t= 475 R= 4e+04
-Depth= 9172 States= 1.8e+07 Transitions= 1.9e+08 Memory= 2132.893 t= 515 R= 3e+04
-Depth= 9172 States= 1.9e+07 Transitions= 2.02e+08 Memory= 2216.877 t= 548 R= 3e+04
-Depth= 9172 States= 2e+07 Transitions= 2.15e+08 Memory= 2300.861 t= 585 R= 3e+04
-Depth= 9172 States= 2.1e+07 Transitions= 2.25e+08 Memory= 2384.846 t= 610 R= 3e+04
-Depth= 9172 States= 2.2e+07 Transitions= 2.38e+08 Memory= 2468.830 t= 646 R= 3e+04
-Depth= 9172 States= 2.3e+07 Transitions= 2.67e+08 Memory= 2552.717 t= 732 R= 3e+04
-Depth= 9172 States= 2.4e+07 Transitions= 2.86e+08 Memory= 2636.701 t= 785 R= 3e+04
-Depth= 9172 States= 2.5e+07 Transitions= 3.03e+08 Memory= 2720.686 t= 832 R= 3e+04
-Depth= 9172 States= 2.6e+07 Transitions= 3.12e+08 Memory= 2804.670 t= 857 R= 3e+04
-Depth= 9172 States= 2.7e+07 Transitions= 3.27e+08 Memory= 2888.654 t= 899 R= 3e+04
-Depth= 9172 States= 2.8e+07 Transitions= 3.57e+08 Memory= 2972.639 t= 987 R= 3e+04
-Depth= 9172 States= 2.9e+07 Transitions= 3.73e+08 Memory= 3056.526 t= 1.03e+03 R= 3e+04
-Depth= 9172 States= 3e+07 Transitions= 3.86e+08 Memory= 3140.510 t= 1.07e+03 R= 3e+04
-Depth= 9172 States= 3.1e+07 Transitions= 4.03e+08 Memory= 3224.494 t= 1.12e+03 R= 3e+04
-Depth= 9172 States= 3.2e+07 Transitions= 4.22e+08 Memory= 3308.479 t= 1.17e+03 R= 3e+04
-Depth= 9172 States= 3.3e+07 Transitions= 4.39e+08 Memory= 3392.463 t= 1.22e+03 R= 3e+04
-Depth= 9172 States= 3.4e+07 Transitions= 4.56e+08 Memory= 3476.447 t= 1.27e+03 R= 3e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9234 States= 3.5e+07 Transitions= 4.73e+08 Memory= 4056.416 t= 1.33e+03 R= 3e+04
-Depth= 9234 States= 3.6e+07 Transitions= 4.85e+08 Memory= 4140.401 t= 1.36e+03 R= 3e+04
-Depth= 9273 States= 3.7e+07 Transitions= 5e+08 Memory= 4224.385 t= 1.4e+03 R= 3e+04
-Depth= 9273 States= 3.8e+07 Transitions= 5.14e+08 Memory= 4308.369 t= 1.44e+03 R= 3e+04
-Depth= 9273 States= 3.9e+07 Transitions= 5.26e+08 Memory= 4392.354 t= 1.47e+03 R= 3e+04
-Depth= 9273 States= 4e+07 Transitions= 5.39e+08 Memory= 4476.338 t= 1.51e+03 R= 3e+04
-Depth= 9273 States= 4.1e+07 Transitions= 5.5e+08 Memory= 4560.322 t= 1.54e+03 R= 3e+04
-Depth= 9273 States= 4.2e+07 Transitions= 5.64e+08 Memory= 4644.209 t= 1.58e+03 R= 3e+04
-Depth= 9273 States= 4.3e+07 Transitions= 5.75e+08 Memory= 4728.193 t= 1.61e+03 R= 3e+04
-Depth= 9273 States= 4.4e+07 Transitions= 5.86e+08 Memory= 4812.178 t= 1.64e+03 R= 3e+04
-Depth= 9273 States= 4.5e+07 Transitions= 6.01e+08 Memory= 4896.162 t= 1.68e+03 R= 3e+04
-Depth= 9273 States= 4.6e+07 Transitions= 6.16e+08 Memory= 4980.147 t= 1.72e+03 R= 3e+04
-Depth= 9273 States= 4.7e+07 Transitions= 6.29e+08 Memory= 5064.131 t= 1.76e+03 R= 3e+04
-Depth= 9273 States= 4.8e+07 Transitions= 6.4e+08 Memory= 5148.018 t= 1.79e+03 R= 3e+04
-Depth= 9273 States= 4.9e+07 Transitions= 6.51e+08 Memory= 5232.002 t= 1.82e+03 R= 3e+04
-Depth= 9273 States= 5e+07 Transitions= 6.66e+08 Memory= 5315.986 t= 1.86e+03 R= 3e+04
-Depth= 9273 States= 5.1e+07 Transitions= 6.8e+08 Memory= 5399.971 t= 1.9e+03 R= 3e+04
-Depth= 9273 States= 5.2e+07 Transitions= 6.9e+08 Memory= 5483.955 t= 1.93e+03 R= 3e+04
-Depth= 9273 States= 5.3e+07 Transitions= 7.01e+08 Memory= 5567.940 t= 1.96e+03 R= 3e+04
-Depth= 9273 States= 5.4e+07 Transitions= 7.14e+08 Memory= 5651.826 t= 1.99e+03 R= 3e+04
-Depth= 9273 States= 5.5e+07 Transitions= 7.26e+08 Memory= 5735.811 t= 2.02e+03 R= 3e+04
-Depth= 9273 States= 5.6e+07 Transitions= 7.44e+08 Memory= 5819.795 t= 2.07e+03 R= 3e+04
-Depth= 9273 States= 5.7e+07 Transitions= 7.57e+08 Memory= 5903.779 t= 2.11e+03 R= 3e+04
-Depth= 9273 States= 5.8e+07 Transitions= 7.72e+08 Memory= 5987.764 t= 2.15e+03 R= 3e+04
-Depth= 9273 States= 5.9e+07 Transitions= 7.87e+08 Memory= 6071.748 t= 2.19e+03 R= 3e+04
-Depth= 9273 States= 6e+07 Transitions= 8.03e+08 Memory= 6155.733 t= 2.24e+03 R= 3e+04
-Depth= 9273 States= 6.1e+07 Transitions= 8.18e+08 Memory= 6239.619 t= 2.28e+03 R= 3e+04
-Depth= 9273 States= 6.2e+07 Transitions= 8.31e+08 Memory= 6323.604 t= 2.31e+03 R= 3e+04
-Depth= 9273 States= 6.3e+07 Transitions= 8.38e+08 Memory= 6407.588 t= 2.33e+03 R= 3e+04
-Depth= 9273 States= 6.4e+07 Transitions= 8.46e+08 Memory= 6491.572 t= 2.35e+03 R= 3e+04
-Depth= 9273 States= 6.5e+07 Transitions= 8.56e+08 Memory= 6575.557 t= 2.38e+03 R= 3e+04
-Depth= 9273 States= 6.6e+07 Transitions= 8.63e+08 Memory= 6659.541 t= 2.4e+03 R= 3e+04
-Depth= 9273 States= 6.7e+07 Transitions= 8.7e+08 Memory= 6743.428 t= 2.42e+03 R= 3e+04
-Depth= 9273 States= 6.8e+07 Transitions= 8.88e+08 Memory= 6827.412 t= 2.47e+03 R= 3e+04
-Depth= 9273 States= 6.9e+07 Transitions= 9e+08 Memory= 6911.397 t= 2.5e+03 R= 3e+04
-pan: claim violated! (at depth 1431)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 9273, errors: 1
- 69874699 states, stored
-8.4222224e+08 states, matched
-9.1209694e+08 transitions (= stored+matched)
-1.3919028e+10 atomic steps
-hash conflicts: 5.0632776e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7729.974 equivalent memory usage for states (stored*(State-vector + overhead))
- 6018.458 actual memory usage for states (compression: 77.86%)
- state-vector as stored = 62 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 3.388 memory lost to fragmentation
- 6984.834 total actual memory usage
-
-unreached in proctype urcu_reader
- line 272, "pan.___", state 30, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 61, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 77, "(1)"
- line 253, "pan.___", state 85, "(1)"
- line 257, "pan.___", state 97, "(1)"
- line 261, "pan.___", state 105, "(1)"
- line 411, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 163, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 177, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 195, "(1)"
- line 257, "pan.___", state 215, "(1)"
- line 261, "pan.___", state 223, "(1)"
- line 691, "pan.___", state 242, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 249, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 281, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 295, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 313, "(1)"
- line 257, "pan.___", state 333, "(1)"
- line 261, "pan.___", state 341, "(1)"
- line 411, "pan.___", state 360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 392, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 406, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 424, "(1)"
- line 257, "pan.___", state 444, "(1)"
- line 261, "pan.___", state 452, "(1)"
- line 411, "pan.___", state 473, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 475, "(1)"
- line 411, "pan.___", state 476, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 476, "else"
- line 411, "pan.___", state 479, "(1)"
- line 415, "pan.___", state 487, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 489, "(1)"
- line 415, "pan.___", state 490, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 490, "else"
- line 415, "pan.___", state 493, "(1)"
- line 415, "pan.___", state 494, "(1)"
- line 415, "pan.___", state 494, "(1)"
- line 413, "pan.___", state 499, "((i<1))"
- line 413, "pan.___", state 499, "((i>=1))"
- line 420, "pan.___", state 505, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 507, "(1)"
- line 420, "pan.___", state 508, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 508, "else"
- line 420, "pan.___", state 511, "(1)"
- line 420, "pan.___", state 512, "(1)"
- line 420, "pan.___", state 512, "(1)"
- line 424, "pan.___", state 519, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 521, "(1)"
- line 424, "pan.___", state 522, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 522, "else"
- line 424, "pan.___", state 525, "(1)"
- line 424, "pan.___", state 526, "(1)"
- line 424, "pan.___", state 526, "(1)"
- line 422, "pan.___", state 531, "((i<2))"
- line 422, "pan.___", state 531, "((i>=2))"
- line 249, "pan.___", state 537, "(1)"
- line 253, "pan.___", state 545, "(1)"
- line 253, "pan.___", state 546, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 546, "else"
- line 251, "pan.___", state 551, "((i<1))"
- line 251, "pan.___", state 551, "((i>=1))"
- line 257, "pan.___", state 557, "(1)"
- line 257, "pan.___", state 558, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 558, "else"
- line 261, "pan.___", state 565, "(1)"
- line 261, "pan.___", state 566, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 566, "else"
- line 259, "pan.___", state 571, "((i<2))"
- line 259, "pan.___", state 571, "((i>=2))"
- line 266, "pan.___", state 575, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 575, "else"
- line 431, "pan.___", state 577, "(1)"
- line 431, "pan.___", state 577, "(1)"
- line 691, "pan.___", state 580, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 691, "pan.___", state 581, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 691, "pan.___", state 582, "(1)"
- line 411, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 621, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 635, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 653, "(1)"
- line 257, "pan.___", state 673, "(1)"
- line 261, "pan.___", state 681, "(1)"
- line 411, "pan.___", state 707, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 739, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 753, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 771, "(1)"
- line 257, "pan.___", state 791, "(1)"
- line 261, "pan.___", state 799, "(1)"
- line 411, "pan.___", state 818, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 820, "(1)"
- line 411, "pan.___", state 821, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 821, "else"
- line 411, "pan.___", state 824, "(1)"
- line 415, "pan.___", state 832, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 834, "(1)"
- line 415, "pan.___", state 835, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 835, "else"
- line 415, "pan.___", state 838, "(1)"
- line 415, "pan.___", state 839, "(1)"
- line 415, "pan.___", state 839, "(1)"
- line 413, "pan.___", state 844, "((i<1))"
- line 413, "pan.___", state 844, "((i>=1))"
- line 420, "pan.___", state 850, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 852, "(1)"
- line 420, "pan.___", state 853, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 853, "else"
- line 420, "pan.___", state 856, "(1)"
- line 420, "pan.___", state 857, "(1)"
- line 420, "pan.___", state 857, "(1)"
- line 424, "pan.___", state 864, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 866, "(1)"
- line 424, "pan.___", state 867, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 867, "else"
- line 424, "pan.___", state 870, "(1)"
- line 424, "pan.___", state 871, "(1)"
- line 424, "pan.___", state 871, "(1)"
- line 422, "pan.___", state 876, "((i<2))"
- line 422, "pan.___", state 876, "((i>=2))"
- line 249, "pan.___", state 882, "(1)"
- line 253, "pan.___", state 890, "(1)"
- line 253, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 891, "else"
- line 251, "pan.___", state 896, "((i<1))"
- line 251, "pan.___", state 896, "((i>=1))"
- line 257, "pan.___", state 902, "(1)"
- line 257, "pan.___", state 903, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 903, "else"
- line 261, "pan.___", state 910, "(1)"
- line 261, "pan.___", state 911, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 911, "else"
- line 259, "pan.___", state 916, "((i<2))"
- line 259, "pan.___", state 916, "((i>=2))"
- line 266, "pan.___", state 920, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 920, "else"
- line 431, "pan.___", state 922, "(1)"
- line 431, "pan.___", state 922, "(1)"
- line 699, "pan.___", state 926, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 963, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 977, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 995, "(1)"
- line 257, "pan.___", state 1015, "(1)"
- line 261, "pan.___", state 1023, "(1)"
- line 411, "pan.___", state 1045, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1077, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1091, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1109, "(1)"
- line 257, "pan.___", state 1129, "(1)"
- line 261, "pan.___", state 1137, "(1)"
- line 411, "pan.___", state 1160, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1192, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1206, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1224, "(1)"
- line 257, "pan.___", state 1244, "(1)"
- line 261, "pan.___", state 1252, "(1)"
- line 411, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1303, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1317, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1335, "(1)"
- line 257, "pan.___", state 1355, "(1)"
- line 261, "pan.___", state 1363, "(1)"
- line 411, "pan.___", state 1387, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1419, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1433, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1451, "(1)"
- line 257, "pan.___", state 1471, "(1)"
- line 261, "pan.___", state 1479, "(1)"
- line 411, "pan.___", state 1498, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1530, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1544, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1562, "(1)"
- line 257, "pan.___", state 1582, "(1)"
- line 261, "pan.___", state 1590, "(1)"
- line 411, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1644, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1658, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1676, "(1)"
- line 257, "pan.___", state 1696, "(1)"
- line 261, "pan.___", state 1704, "(1)"
- line 738, "pan.___", state 1723, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1730, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1762, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1776, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1794, "(1)"
- line 257, "pan.___", state 1814, "(1)"
- line 261, "pan.___", state 1822, "(1)"
- line 411, "pan.___", state 1841, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1873, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1887, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1905, "(1)"
- line 257, "pan.___", state 1925, "(1)"
- line 261, "pan.___", state 1933, "(1)"
- line 411, "pan.___", state 1954, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 1956, "(1)"
- line 411, "pan.___", state 1957, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 1957, "else"
- line 411, "pan.___", state 1960, "(1)"
- line 415, "pan.___", state 1968, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1970, "(1)"
- line 415, "pan.___", state 1971, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 1971, "else"
- line 415, "pan.___", state 1974, "(1)"
- line 415, "pan.___", state 1975, "(1)"
- line 415, "pan.___", state 1975, "(1)"
- line 413, "pan.___", state 1980, "((i<1))"
- line 413, "pan.___", state 1980, "((i>=1))"
- line 420, "pan.___", state 1986, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1988, "(1)"
- line 420, "pan.___", state 1989, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 1989, "else"
- line 420, "pan.___", state 1992, "(1)"
- line 420, "pan.___", state 1993, "(1)"
- line 420, "pan.___", state 1993, "(1)"
- line 424, "pan.___", state 2000, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2002, "(1)"
- line 424, "pan.___", state 2003, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2003, "else"
- line 424, "pan.___", state 2006, "(1)"
- line 424, "pan.___", state 2007, "(1)"
- line 424, "pan.___", state 2007, "(1)"
- line 422, "pan.___", state 2012, "((i<2))"
- line 422, "pan.___", state 2012, "((i>=2))"
- line 249, "pan.___", state 2018, "(1)"
- line 253, "pan.___", state 2026, "(1)"
- line 253, "pan.___", state 2027, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2027, "else"
- line 251, "pan.___", state 2032, "((i<1))"
- line 251, "pan.___", state 2032, "((i>=1))"
- line 257, "pan.___", state 2038, "(1)"
- line 257, "pan.___", state 2039, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2039, "else"
- line 261, "pan.___", state 2046, "(1)"
- line 261, "pan.___", state 2047, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2047, "else"
- line 259, "pan.___", state 2052, "((i<2))"
- line 259, "pan.___", state 2052, "((i>=2))"
- line 266, "pan.___", state 2056, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2056, "else"
- line 431, "pan.___", state 2058, "(1)"
- line 431, "pan.___", state 2058, "(1)"
- line 738, "pan.___", state 2061, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 738, "pan.___", state 2062, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 738, "pan.___", state 2063, "(1)"
- line 411, "pan.___", state 2070, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2102, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2116, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2134, "(1)"
- line 257, "pan.___", state 2154, "(1)"
- line 261, "pan.___", state 2162, "(1)"
- line 411, "pan.___", state 2187, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2219, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2233, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2251, "(1)"
- line 257, "pan.___", state 2271, "(1)"
- line 261, "pan.___", state 2279, "(1)"
- line 411, "pan.___", state 2298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2362, "(1)"
- line 257, "pan.___", state 2382, "(1)"
- line 261, "pan.___", state 2390, "(1)"
- line 249, "pan.___", state 2421, "(1)"
- line 257, "pan.___", state 2441, "(1)"
- line 261, "pan.___", state 2449, "(1)"
- line 249, "pan.___", state 2464, "(1)"
- line 257, "pan.___", state 2484, "(1)"
- line 261, "pan.___", state 2492, "(1)"
- line 898, "pan.___", state 2509, "-end-"
- (221 of 2509 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 19, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 33, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 83, "(1)"
- line 253, "pan.___", state 91, "(1)"
- line 272, "pan.___", state 132, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 134, "(1)"
- line 276, "pan.___", state 141, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 143, "(1)"
- line 276, "pan.___", state 144, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 144, "else"
- line 274, "pan.___", state 149, "((i<1))"
- line 274, "pan.___", state 149, "((i>=1))"
- line 280, "pan.___", state 154, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 156, "(1)"
- line 280, "pan.___", state 157, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 157, "else"
- line 284, "pan.___", state 163, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 165, "(1)"
- line 284, "pan.___", state 166, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 166, "else"
- line 289, "pan.___", state 175, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 175, "else"
- line 411, "pan.___", state 194, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 208, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 226, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 240, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 258, "(1)"
- line 253, "pan.___", state 266, "(1)"
- line 257, "pan.___", state 278, "(1)"
- line 261, "pan.___", state 286, "(1)"
- line 415, "pan.___", state 321, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 339, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 353, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 379, "(1)"
- line 257, "pan.___", state 391, "(1)"
- line 261, "pan.___", state 399, "(1)"
- line 415, "pan.___", state 442, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 460, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 474, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 500, "(1)"
- line 257, "pan.___", state 512, "(1)"
- line 261, "pan.___", state 520, "(1)"
- line 415, "pan.___", state 553, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 571, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 585, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 611, "(1)"
- line 257, "pan.___", state 623, "(1)"
- line 261, "pan.___", state 631, "(1)"
- line 415, "pan.___", state 666, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 684, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 698, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 724, "(1)"
- line 257, "pan.___", state 736, "(1)"
- line 261, "pan.___", state 744, "(1)"
- line 272, "pan.___", state 797, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 806, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 844, "(1)"
- line 253, "pan.___", state 852, "(1)"
- line 257, "pan.___", state 864, "(1)"
- line 261, "pan.___", state 872, "(1)"
- line 272, "pan.___", state 903, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 912, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 925, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 934, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 950, "(1)"
- line 253, "pan.___", state 958, "(1)"
- line 257, "pan.___", state 970, "(1)"
- line 261, "pan.___", state 978, "(1)"
- line 276, "pan.___", state 1004, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1017, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1026, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1042, "(1)"
- line 253, "pan.___", state 1050, "(1)"
- line 257, "pan.___", state 1062, "(1)"
- line 261, "pan.___", state 1070, "(1)"
- line 272, "pan.___", state 1101, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1110, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1123, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1132, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1148, "(1)"
- line 253, "pan.___", state 1156, "(1)"
- line 257, "pan.___", state 1168, "(1)"
- line 261, "pan.___", state 1176, "(1)"
- line 276, "pan.___", state 1202, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1215, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1224, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1240, "(1)"
- line 253, "pan.___", state 1248, "(1)"
- line 257, "pan.___", state 1260, "(1)"
- line 261, "pan.___", state 1268, "(1)"
- line 272, "pan.___", state 1299, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1308, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1321, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1330, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1346, "(1)"
- line 253, "pan.___", state 1354, "(1)"
- line 257, "pan.___", state 1366, "(1)"
- line 261, "pan.___", state 1374, "(1)"
- line 276, "pan.___", state 1400, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1413, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1422, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1438, "(1)"
- line 253, "pan.___", state 1446, "(1)"
- line 257, "pan.___", state 1458, "(1)"
- line 261, "pan.___", state 1466, "(1)"
- line 272, "pan.___", state 1497, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1506, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1519, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1528, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1544, "(1)"
- line 253, "pan.___", state 1552, "(1)"
- line 257, "pan.___", state 1564, "(1)"
- line 261, "pan.___", state 1572, "(1)"
- line 1237, "pan.___", state 1588, "-end-"
- (109 of 1588 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 2.53e+03 seconds
-pan: rate 27617.257 states/second
-pan: avg transition delay 2.7739e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
+++ /dev/null
-#define NO_WMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4177
-2:3:4097
-3:3:4100
-4:3:4100
-5:3:4103
-6:3:4111
-7:3:4111
-8:3:4114
-9:3:4120
-10:3:4124
-11:3:4124
-12:3:4127
-13:3:4137
-14:3:4145
-15:3:4145
-16:3:4148
-17:3:4154
-18:3:4158
-19:3:4158
-20:3:4161
-21:3:4167
-22:3:4171
-23:3:4172
-24:0:4177
-25:3:4174
-26:0:4177
-27:2:2511
-28:0:4177
-29:2:2517
-30:0:4177
-31:2:2518
-32:0:4177
-33:2:2520
-34:0:4177
-35:2:2521
-36:0:4177
-37:2:2522
-38:0:4177
-39:2:2523
-40:2:2524
-41:2:2528
-42:2:2529
-43:2:2537
-44:2:2538
-45:2:2542
-46:2:2543
-47:2:2551
-48:2:2556
-49:2:2560
-50:2:2561
-51:2:2569
-52:2:2570
-53:2:2574
-54:2:2575
-55:2:2569
-56:2:2570
-57:2:2574
-58:2:2575
-59:2:2583
-60:2:2588
-61:2:2595
-62:2:2596
-63:2:2603
-64:2:2608
-65:2:2615
-66:2:2616
-67:2:2615
-68:2:2616
-69:2:2623
-70:2:2633
-71:0:4177
-72:2:2522
-73:0:4177
-74:2:2685
-75:2:2686
-76:2:2687
-77:0:4177
-78:2:2522
-79:0:4177
-80:2:2692
-81:0:4177
-82:2:3306
-83:2:3307
-84:2:3311
-85:2:3315
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-996:2:2537
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-998:2:2542
-999:2:2543
-1000:2:2551
-1001:2:2556
-1002:2:2560
-1003:2:2561
-1004:2:2569
-1005:2:2570
-1006:2:2574
-1007:2:2575
-1008:2:2569
-1009:2:2570
-1010:2:2571
-1011:2:2583
-1012:2:2588
-1013:2:2595
-1014:2:2596
-1015:2:2603
-1016:2:2608
-1017:2:2615
-1018:2:2616
-1019:2:2615
-1020:2:2616
-1021:2:2623
-1022:2:2633
-1023:0:4177
-1024:2:2522
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-1026:2:2685
-1027:2:2686
-1028:2:2687
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-1030:2:2522
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-1084:1:237
-1085:1:238
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-1215:1:676
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-1217:1:684
-1218:0:4177
-1219:1:15
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-1221:1:16
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-1225:1:118
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-1227:1:120
-1228:0:4177
-1229:1:19
-1230:0:4177
-1231:1:695
-1232:1:698
-1233:1:699
-1234:0:4177
-1235:1:15
-1236:0:4177
-1237:1:16
-1238:0:4177
-1239:1:17
-1240:0:4177
-1241:1:118
-1242:0:4177
-1243:1:120
-1244:0:4177
-1245:1:19
-1246:0:4177
-1247:1:702
-1248:1:703
-1249:1:707
-1250:1:708
-1251:1:716
-1252:1:717
-1253:1:721
-1254:1:722
-1255:1:730
-1256:1:735
-1257:1:739
-1258:1:740
-1259:1:748
-1260:1:749
-1261:1:753
-1262:1:754
-1263:1:748
-1264:1:749
-1265:1:753
-1266:1:754
-1267:1:762
-1268:1:767
-1269:1:774
-1270:1:775
-1271:1:782
-1272:1:787
-1273:1:794
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-1275:1:794
-1276:1:795
-1277:1:802
-1278:0:4177
-1279:1:15
-1280:0:4177
-1281:1:16
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-1283:1:17
-1284:0:4177
-1285:1:118
-1286:0:4177
-1287:1:120
-1288:0:4177
-1289:1:19
-1290:0:4177
-1291:1:926
-1292:1:927
-1293:1:931
-1294:1:932
-1295:1:940
-1296:1:941
-1297:1:945
-1298:1:946
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-1300:1:959
-1301:1:963
-1302:1:964
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-1306:1:978
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-1308:1:973
-1309:1:977
-1310:1:978
-1311:1:986
-1312:1:991
-1313:1:998
-1314:1:999
-1315:1:1006
-1316:1:1011
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-1318:1:1019
-1319:1:1018
-1320:1:1019
-1321:1:1026
-1322:1:1035
-1323:1:1039
-1324:0:4177
-1325:1:15
-1326:0:4177
-1327:1:16
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-1329:1:17
-1330:0:4177
-1331:1:118
-1332:0:4177
-1333:1:120
-1334:0:4177
-1335:1:19
-1336:0:4177
-1337:1:1040
-1338:1:1041
-1339:1:1045
-1340:1:1046
-1341:1:1054
-1342:1:1055
-1343:1:1056
-1344:1:1068
-1345:1:1073
-1346:1:1077
-1347:1:1078
-1348:1:1086
-1349:1:1087
-1350:1:1091
-1351:1:1092
-1352:1:1086
-1353:1:1087
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-1356:1:1100
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-1358:1:1112
-1359:1:1113
-1360:1:1120
-1361:1:1125
-1362:1:1132
-1363:1:1133
-1364:1:1132
-1365:1:1133
-1366:1:1140
-1367:0:4177
-1368:1:15
-1369:0:4177
-1370:1:16
-1371:0:4177
-1372:1:17
-1373:0:4177
-1374:1:118
-1375:0:4177
-1376:1:120
-1377:0:4177
-1378:1:19
-1379:0:4177
-1380:1:1151
-1381:0:4177
-1382:1:2417
-1383:1:2424
-1384:1:2425
-1385:1:2432
-1386:1:2437
-1387:1:2444
-1388:1:2445
-1389:1:2444
-1390:1:2445
-1391:1:2452
-1392:1:2456
-1393:0:4177
-1394:2:3306
-1395:2:3307
-1396:2:3311
-1397:2:3315
-1398:2:3316
-1399:2:3320
-1400:2:3325
-1401:2:3333
-1402:2:3337
-1403:2:3338
-1404:2:3333
-1405:2:3334
-1406:2:3342
-1407:2:3349
-1408:2:3356
-1409:2:3357
-1410:2:3364
-1411:2:3369
-1412:2:3376
-1413:2:3377
-1414:2:3376
-1415:2:3377
-1416:2:3384
-1417:2:3388
-1418:0:4177
-1419:2:3393
-1420:0:4177
-1421:2:3394
-1422:0:4177
-1423:2:3395
-1424:0:4177
-1425:2:3396
-1426:0:4177
-1427:1:1153
-1428:1:1154
-1429:0:4175
-1430:2:3397
-1431:0:4181
-1432:1:2165
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 9112 States= 1e+06 Transitions= 7.1e+06 Memory= 550.432 t= 17.4 R= 6e+04
-Depth= 9112 States= 2e+06 Transitions= 1.64e+07 Memory= 634.318 t= 41.8 R= 5e+04
-Depth= 9112 States= 3e+06 Transitions= 2.63e+07 Memory= 718.303 t= 68.2 R= 4e+04
-pan: resizing hashtable to -w22.. done
-Depth= 9112 States= 4e+06 Transitions= 3.56e+07 Memory= 833.311 t= 93.2 R= 4e+04
-Depth= 9112 States= 5e+06 Transitions= 4.66e+07 Memory= 917.295 t= 122 R= 4e+04
-Depth= 9112 States= 6e+06 Transitions= 5.77e+07 Memory= 1001.279 t= 152 R= 4e+04
-Depth= 9112 States= 7e+06 Transitions= 6.72e+07 Memory= 1085.264 t= 177 R= 4e+04
-Depth= 9112 States= 8e+06 Transitions= 7.41e+07 Memory= 1169.151 t= 194 R= 4e+04
-Depth= 9112 States= 9e+06 Transitions= 8.11e+07 Memory= 1253.135 t= 212 R= 4e+04
-pan: resizing hashtable to -w24.. done
-Depth= 9112 States= 1e+07 Transitions= 8.81e+07 Memory= 1461.115 t= 231 R= 4e+04
-Depth= 9112 States= 1.1e+07 Transitions= 9.84e+07 Memory= 1545.100 t= 259 R= 4e+04
-Depth= 9112 States= 1.2e+07 Transitions= 1.08e+08 Memory= 1629.084 t= 282 R= 4e+04
-Depth= 9112 States= 1.3e+07 Transitions= 1.16e+08 Memory= 1713.068 t= 304 R= 4e+04
-Depth= 9112 States= 1.4e+07 Transitions= 1.25e+08 Memory= 1797.053 t= 329 R= 4e+04
-Depth= 9112 States= 1.5e+07 Transitions= 1.35e+08 Memory= 1881.037 t= 352 R= 4e+04
-Depth= 9278 States= 1.6e+07 Transitions= 1.45e+08 Memory= 1964.924 t= 382 R= 4e+04
-Depth= 9283 States= 1.7e+07 Transitions= 1.56e+08 Memory= 2048.908 t= 409 R= 4e+04
-Depth= 9283 States= 1.8e+07 Transitions= 1.66e+08 Memory= 2132.893 t= 437 R= 4e+04
-Depth= 9283 States= 1.9e+07 Transitions= 1.76e+08 Memory= 2216.877 t= 464 R= 4e+04
-Depth= 9283 States= 2e+07 Transitions= 1.87e+08 Memory= 2300.861 t= 493 R= 4e+04
-Depth= 9283 States= 2.1e+07 Transitions= 1.97e+08 Memory= 2384.846 t= 521 R= 4e+04
-Depth= 9283 States= 2.2e+07 Transitions= 2.08e+08 Memory= 2468.830 t= 549 R= 4e+04
-Depth= 9283 States= 2.3e+07 Transitions= 2.17e+08 Memory= 2552.717 t= 572 R= 4e+04
-Depth= 9283 States= 2.4e+07 Transitions= 2.26e+08 Memory= 2636.701 t= 596 R= 4e+04
-Depth= 9283 States= 2.5e+07 Transitions= 2.37e+08 Memory= 2720.686 t= 627 R= 4e+04
-Depth= 9283 States= 2.6e+07 Transitions= 2.49e+08 Memory= 2804.670 t= 659 R= 4e+04
-Depth= 9283 States= 2.7e+07 Transitions= 2.6e+08 Memory= 2888.654 t= 689 R= 4e+04
-Depth= 9283 States= 2.8e+07 Transitions= 2.71e+08 Memory= 2972.639 t= 718 R= 4e+04
-Depth= 9283 States= 2.9e+07 Transitions= 2.8e+08 Memory= 3056.526 t= 741 R= 4e+04
-Depth= 9283 States= 3e+07 Transitions= 2.89e+08 Memory= 3140.510 t= 764 R= 4e+04
-Depth= 9283 States= 3.1e+07 Transitions= 2.99e+08 Memory= 3224.494 t= 791 R= 4e+04
-Depth= 9283 States= 3.2e+07 Transitions= 3.09e+08 Memory= 3308.479 t= 818 R= 4e+04
-Depth= 9283 States= 3.3e+07 Transitions= 3.19e+08 Memory= 3392.463 t= 846 R= 4e+04
-Depth= 9283 States= 3.4e+07 Transitions= 3.29e+08 Memory= 3476.447 t= 873 R= 4e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9283 States= 3.5e+07 Transitions= 3.39e+08 Memory= 4056.416 t= 908 R= 4e+04
-Depth= 9283 States= 3.6e+07 Transitions= 3.49e+08 Memory= 4140.401 t= 934 R= 4e+04
-Depth= 9283 States= 3.7e+07 Transitions= 3.59e+08 Memory= 4224.385 t= 959 R= 4e+04
-pan: claim violated! (at depth 1298)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 9283, errors: 1
- 37684654 states, stored
-3.2905753e+08 states, matched
-3.6674218e+08 transitions (= stored+matched)
-5.3145922e+09 atomic steps
-hash conflicts: 2.6456917e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4168.911 equivalent memory usage for states (stored*(State-vector + overhead))
- 3314.050 actual memory usage for states (compression: 79.49%)
- state-vector as stored = 64 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 1.910 memory lost to fragmentation
- 4281.904 total actual memory usage
-
-unreached in proctype urcu_reader
- line 272, "pan.___", state 30, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 61, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 77, "(1)"
- line 253, "pan.___", state 85, "(1)"
- line 257, "pan.___", state 97, "(1)"
- line 261, "pan.___", state 105, "(1)"
- line 411, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 163, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 177, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 195, "(1)"
- line 257, "pan.___", state 215, "(1)"
- line 261, "pan.___", state 223, "(1)"
- line 691, "pan.___", state 242, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 249, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 281, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 295, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 313, "(1)"
- line 257, "pan.___", state 333, "(1)"
- line 261, "pan.___", state 341, "(1)"
- line 411, "pan.___", state 360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 392, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 406, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 424, "(1)"
- line 257, "pan.___", state 444, "(1)"
- line 261, "pan.___", state 452, "(1)"
- line 411, "pan.___", state 473, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 475, "(1)"
- line 411, "pan.___", state 476, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 476, "else"
- line 411, "pan.___", state 479, "(1)"
- line 415, "pan.___", state 487, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 489, "(1)"
- line 415, "pan.___", state 490, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 490, "else"
- line 415, "pan.___", state 493, "(1)"
- line 415, "pan.___", state 494, "(1)"
- line 415, "pan.___", state 494, "(1)"
- line 413, "pan.___", state 499, "((i<1))"
- line 413, "pan.___", state 499, "((i>=1))"
- line 420, "pan.___", state 505, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 507, "(1)"
- line 420, "pan.___", state 508, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 508, "else"
- line 420, "pan.___", state 511, "(1)"
- line 420, "pan.___", state 512, "(1)"
- line 420, "pan.___", state 512, "(1)"
- line 424, "pan.___", state 519, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 521, "(1)"
- line 424, "pan.___", state 522, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 522, "else"
- line 424, "pan.___", state 525, "(1)"
- line 424, "pan.___", state 526, "(1)"
- line 424, "pan.___", state 526, "(1)"
- line 422, "pan.___", state 531, "((i<2))"
- line 422, "pan.___", state 531, "((i>=2))"
- line 249, "pan.___", state 537, "(1)"
- line 253, "pan.___", state 545, "(1)"
- line 253, "pan.___", state 546, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 546, "else"
- line 251, "pan.___", state 551, "((i<1))"
- line 251, "pan.___", state 551, "((i>=1))"
- line 257, "pan.___", state 557, "(1)"
- line 257, "pan.___", state 558, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 558, "else"
- line 261, "pan.___", state 565, "(1)"
- line 261, "pan.___", state 566, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 566, "else"
- line 259, "pan.___", state 571, "((i<2))"
- line 259, "pan.___", state 571, "((i>=2))"
- line 266, "pan.___", state 575, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 575, "else"
- line 431, "pan.___", state 577, "(1)"
- line 431, "pan.___", state 577, "(1)"
- line 691, "pan.___", state 580, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 691, "pan.___", state 581, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 691, "pan.___", state 582, "(1)"
- line 411, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 621, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 635, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 653, "(1)"
- line 257, "pan.___", state 673, "(1)"
- line 261, "pan.___", state 681, "(1)"
- line 411, "pan.___", state 707, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 739, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 753, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 771, "(1)"
- line 257, "pan.___", state 791, "(1)"
- line 261, "pan.___", state 799, "(1)"
- line 411, "pan.___", state 818, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 820, "(1)"
- line 411, "pan.___", state 821, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 821, "else"
- line 411, "pan.___", state 824, "(1)"
- line 415, "pan.___", state 832, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 834, "(1)"
- line 415, "pan.___", state 835, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 835, "else"
- line 415, "pan.___", state 838, "(1)"
- line 415, "pan.___", state 839, "(1)"
- line 415, "pan.___", state 839, "(1)"
- line 413, "pan.___", state 844, "((i<1))"
- line 413, "pan.___", state 844, "((i>=1))"
- line 420, "pan.___", state 850, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 852, "(1)"
- line 420, "pan.___", state 853, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 853, "else"
- line 420, "pan.___", state 856, "(1)"
- line 420, "pan.___", state 857, "(1)"
- line 420, "pan.___", state 857, "(1)"
- line 424, "pan.___", state 864, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 866, "(1)"
- line 424, "pan.___", state 867, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 867, "else"
- line 424, "pan.___", state 870, "(1)"
- line 424, "pan.___", state 871, "(1)"
- line 424, "pan.___", state 871, "(1)"
- line 422, "pan.___", state 876, "((i<2))"
- line 422, "pan.___", state 876, "((i>=2))"
- line 249, "pan.___", state 882, "(1)"
- line 253, "pan.___", state 890, "(1)"
- line 253, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 891, "else"
- line 251, "pan.___", state 896, "((i<1))"
- line 251, "pan.___", state 896, "((i>=1))"
- line 257, "pan.___", state 902, "(1)"
- line 257, "pan.___", state 903, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 903, "else"
- line 261, "pan.___", state 910, "(1)"
- line 261, "pan.___", state 911, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 911, "else"
- line 259, "pan.___", state 916, "((i<2))"
- line 259, "pan.___", state 916, "((i>=2))"
- line 266, "pan.___", state 920, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 920, "else"
- line 431, "pan.___", state 922, "(1)"
- line 431, "pan.___", state 922, "(1)"
- line 699, "pan.___", state 926, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 963, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 977, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 995, "(1)"
- line 257, "pan.___", state 1015, "(1)"
- line 261, "pan.___", state 1023, "(1)"
- line 411, "pan.___", state 1045, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1077, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1091, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1109, "(1)"
- line 257, "pan.___", state 1129, "(1)"
- line 261, "pan.___", state 1137, "(1)"
- line 411, "pan.___", state 1160, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1192, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1206, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1224, "(1)"
- line 257, "pan.___", state 1244, "(1)"
- line 261, "pan.___", state 1252, "(1)"
- line 411, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1303, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1317, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1335, "(1)"
- line 257, "pan.___", state 1355, "(1)"
- line 261, "pan.___", state 1363, "(1)"
- line 411, "pan.___", state 1387, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1419, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1433, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1451, "(1)"
- line 257, "pan.___", state 1471, "(1)"
- line 261, "pan.___", state 1479, "(1)"
- line 411, "pan.___", state 1498, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1530, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1544, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1562, "(1)"
- line 257, "pan.___", state 1582, "(1)"
- line 261, "pan.___", state 1590, "(1)"
- line 411, "pan.___", state 1612, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1644, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1658, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1676, "(1)"
- line 257, "pan.___", state 1696, "(1)"
- line 261, "pan.___", state 1704, "(1)"
- line 738, "pan.___", state 1723, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1730, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1762, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1776, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1794, "(1)"
- line 257, "pan.___", state 1814, "(1)"
- line 261, "pan.___", state 1822, "(1)"
- line 411, "pan.___", state 1841, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1873, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1887, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1905, "(1)"
- line 257, "pan.___", state 1925, "(1)"
- line 261, "pan.___", state 1933, "(1)"
- line 411, "pan.___", state 1954, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 1956, "(1)"
- line 411, "pan.___", state 1957, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 1957, "else"
- line 411, "pan.___", state 1960, "(1)"
- line 415, "pan.___", state 1968, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1970, "(1)"
- line 415, "pan.___", state 1971, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 1971, "else"
- line 415, "pan.___", state 1974, "(1)"
- line 415, "pan.___", state 1975, "(1)"
- line 415, "pan.___", state 1975, "(1)"
- line 413, "pan.___", state 1980, "((i<1))"
- line 413, "pan.___", state 1980, "((i>=1))"
- line 420, "pan.___", state 1986, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1988, "(1)"
- line 420, "pan.___", state 1989, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 1989, "else"
- line 420, "pan.___", state 1992, "(1)"
- line 420, "pan.___", state 1993, "(1)"
- line 420, "pan.___", state 1993, "(1)"
- line 424, "pan.___", state 2000, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2002, "(1)"
- line 424, "pan.___", state 2003, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2003, "else"
- line 424, "pan.___", state 2006, "(1)"
- line 424, "pan.___", state 2007, "(1)"
- line 424, "pan.___", state 2007, "(1)"
- line 422, "pan.___", state 2012, "((i<2))"
- line 422, "pan.___", state 2012, "((i>=2))"
- line 249, "pan.___", state 2018, "(1)"
- line 253, "pan.___", state 2026, "(1)"
- line 253, "pan.___", state 2027, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2027, "else"
- line 251, "pan.___", state 2032, "((i<1))"
- line 251, "pan.___", state 2032, "((i>=1))"
- line 257, "pan.___", state 2038, "(1)"
- line 257, "pan.___", state 2039, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2039, "else"
- line 261, "pan.___", state 2046, "(1)"
- line 261, "pan.___", state 2047, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2047, "else"
- line 259, "pan.___", state 2052, "((i<2))"
- line 259, "pan.___", state 2052, "((i>=2))"
- line 266, "pan.___", state 2056, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2056, "else"
- line 431, "pan.___", state 2058, "(1)"
- line 431, "pan.___", state 2058, "(1)"
- line 738, "pan.___", state 2061, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 738, "pan.___", state 2062, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 738, "pan.___", state 2063, "(1)"
- line 411, "pan.___", state 2070, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2102, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2116, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2134, "(1)"
- line 257, "pan.___", state 2154, "(1)"
- line 261, "pan.___", state 2162, "(1)"
- line 411, "pan.___", state 2187, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2219, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2233, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2251, "(1)"
- line 257, "pan.___", state 2271, "(1)"
- line 261, "pan.___", state 2279, "(1)"
- line 411, "pan.___", state 2298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2330, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2344, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2362, "(1)"
- line 257, "pan.___", state 2382, "(1)"
- line 261, "pan.___", state 2390, "(1)"
- line 249, "pan.___", state 2421, "(1)"
- line 257, "pan.___", state 2441, "(1)"
- line 261, "pan.___", state 2449, "(1)"
- line 249, "pan.___", state 2464, "(1)"
- line 257, "pan.___", state 2484, "(1)"
- line 261, "pan.___", state 2492, "(1)"
- line 898, "pan.___", state 2509, "-end-"
- (221 of 2509 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 22, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 36, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 54, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 86, "(1)"
- line 253, "pan.___", state 94, "(1)"
- line 257, "pan.___", state 106, "(1)"
- line 272, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 144, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 157, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 211, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 229, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 243, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 261, "(1)"
- line 253, "pan.___", state 269, "(1)"
- line 257, "pan.___", state 281, "(1)"
- line 261, "pan.___", state 289, "(1)"
- line 415, "pan.___", state 324, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 342, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 356, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 382, "(1)"
- line 257, "pan.___", state 394, "(1)"
- line 261, "pan.___", state 402, "(1)"
- line 411, "pan.___", state 430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 444, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 462, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 476, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 494, "(1)"
- line 253, "pan.___", state 502, "(1)"
- line 257, "pan.___", state 514, "(1)"
- line 261, "pan.___", state 522, "(1)"
- line 411, "pan.___", state 541, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 543, "(1)"
- line 411, "pan.___", state 544, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 544, "else"
- line 411, "pan.___", state 547, "(1)"
- line 415, "pan.___", state 555, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 557, "(1)"
- line 415, "pan.___", state 558, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 558, "else"
- line 415, "pan.___", state 561, "(1)"
- line 415, "pan.___", state 562, "(1)"
- line 415, "pan.___", state 562, "(1)"
- line 413, "pan.___", state 567, "((i<1))"
- line 413, "pan.___", state 567, "((i>=1))"
- line 420, "pan.___", state 573, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 575, "(1)"
- line 420, "pan.___", state 576, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 576, "else"
- line 420, "pan.___", state 579, "(1)"
- line 420, "pan.___", state 580, "(1)"
- line 420, "pan.___", state 580, "(1)"
- line 424, "pan.___", state 587, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 589, "(1)"
- line 424, "pan.___", state 590, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 590, "else"
- line 424, "pan.___", state 593, "(1)"
- line 424, "pan.___", state 594, "(1)"
- line 424, "pan.___", state 594, "(1)"
- line 422, "pan.___", state 599, "((i<2))"
- line 422, "pan.___", state 599, "((i>=2))"
- line 249, "pan.___", state 605, "(1)"
- line 253, "pan.___", state 613, "(1)"
- line 253, "pan.___", state 614, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 614, "else"
- line 251, "pan.___", state 619, "((i<1))"
- line 251, "pan.___", state 619, "((i>=1))"
- line 257, "pan.___", state 625, "(1)"
- line 257, "pan.___", state 626, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 626, "else"
- line 261, "pan.___", state 633, "(1)"
- line 261, "pan.___", state 634, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 634, "else"
- line 259, "pan.___", state 639, "((i<2))"
- line 259, "pan.___", state 639, "((i>=2))"
- line 266, "pan.___", state 643, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 643, "else"
- line 431, "pan.___", state 645, "(1)"
- line 431, "pan.___", state 645, "(1)"
- line 1117, "pan.___", state 649, "_proc_urcu_writer = (_proc_urcu_writer|(1<<10))"
- line 411, "pan.___", state 654, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 656, "(1)"
- line 411, "pan.___", state 657, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 657, "else"
- line 411, "pan.___", state 660, "(1)"
- line 415, "pan.___", state 668, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 670, "(1)"
- line 415, "pan.___", state 671, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 671, "else"
- line 415, "pan.___", state 674, "(1)"
- line 415, "pan.___", state 675, "(1)"
- line 415, "pan.___", state 675, "(1)"
- line 413, "pan.___", state 680, "((i<1))"
- line 413, "pan.___", state 680, "((i>=1))"
- line 420, "pan.___", state 686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 688, "(1)"
- line 420, "pan.___", state 689, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 689, "else"
- line 420, "pan.___", state 692, "(1)"
- line 420, "pan.___", state 693, "(1)"
- line 420, "pan.___", state 693, "(1)"
- line 424, "pan.___", state 700, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 702, "(1)"
- line 424, "pan.___", state 703, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 703, "else"
- line 424, "pan.___", state 706, "(1)"
- line 424, "pan.___", state 707, "(1)"
- line 424, "pan.___", state 707, "(1)"
- line 422, "pan.___", state 712, "((i<2))"
- line 422, "pan.___", state 712, "((i>=2))"
- line 249, "pan.___", state 718, "(1)"
- line 253, "pan.___", state 726, "(1)"
- line 253, "pan.___", state 727, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 727, "else"
- line 251, "pan.___", state 732, "((i<1))"
- line 251, "pan.___", state 732, "((i>=1))"
- line 257, "pan.___", state 738, "(1)"
- line 257, "pan.___", state 739, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 739, "else"
- line 261, "pan.___", state 746, "(1)"
- line 261, "pan.___", state 747, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 747, "else"
- line 259, "pan.___", state 752, "((i<2))"
- line 259, "pan.___", state 752, "((i>=2))"
- line 266, "pan.___", state 756, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 756, "else"
- line 431, "pan.___", state 758, "(1)"
- line 431, "pan.___", state 758, "(1)"
- line 1133, "pan.___", state 763, "_proc_urcu_writer = (_proc_urcu_writer|(1<<11))"
- line 1128, "pan.___", state 764, "(((tmp2&((1<<7)-1))&&((tmp2^0)&(1<<7))))"
- line 1128, "pan.___", state 764, "else"
- line 1153, "pan.___", state 768, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<12)|(1<<11))))"
- line 272, "pan.___", state 799, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 823, "(1)"
- line 284, "pan.___", state 830, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 846, "(1)"
- line 253, "pan.___", state 854, "(1)"
- line 257, "pan.___", state 866, "(1)"
- line 261, "pan.___", state 874, "(1)"
- line 272, "pan.___", state 905, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 914, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 927, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 936, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 952, "(1)"
- line 253, "pan.___", state 960, "(1)"
- line 257, "pan.___", state 972, "(1)"
- line 261, "pan.___", state 980, "(1)"
- line 276, "pan.___", state 1006, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1019, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1028, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1044, "(1)"
- line 253, "pan.___", state 1052, "(1)"
- line 257, "pan.___", state 1064, "(1)"
- line 261, "pan.___", state 1072, "(1)"
- line 272, "pan.___", state 1103, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1112, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1125, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1134, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1150, "(1)"
- line 253, "pan.___", state 1158, "(1)"
- line 257, "pan.___", state 1170, "(1)"
- line 261, "pan.___", state 1178, "(1)"
- line 272, "pan.___", state 1195, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1197, "(1)"
- line 276, "pan.___", state 1204, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1206, "(1)"
- line 276, "pan.___", state 1207, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1207, "else"
- line 274, "pan.___", state 1212, "((i<1))"
- line 274, "pan.___", state 1212, "((i>=1))"
- line 280, "pan.___", state 1217, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1219, "(1)"
- line 280, "pan.___", state 1220, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1220, "else"
- line 284, "pan.___", state 1226, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1228, "(1)"
- line 284, "pan.___", state 1229, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1229, "else"
- line 282, "pan.___", state 1234, "((i<2))"
- line 282, "pan.___", state 1234, "((i>=2))"
- line 249, "pan.___", state 1242, "(1)"
- line 253, "pan.___", state 1250, "(1)"
- line 253, "pan.___", state 1251, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1251, "else"
- line 251, "pan.___", state 1256, "((i<1))"
- line 251, "pan.___", state 1256, "((i>=1))"
- line 257, "pan.___", state 1262, "(1)"
- line 257, "pan.___", state 1263, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1263, "else"
- line 261, "pan.___", state 1270, "(1)"
- line 261, "pan.___", state 1271, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1271, "else"
- line 266, "pan.___", state 1280, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1280, "else"
- line 1229, "pan.___", state 1283, "i = 0"
- line 1229, "pan.___", state 1285, "reader_barrier = 1"
- line 1229, "pan.___", state 1296, "((i<1))"
- line 1229, "pan.___", state 1296, "((i>=1))"
- line 272, "pan.___", state 1301, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1303, "(1)"
- line 276, "pan.___", state 1310, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1312, "(1)"
- line 276, "pan.___", state 1313, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1313, "else"
- line 274, "pan.___", state 1318, "((i<1))"
- line 274, "pan.___", state 1318, "((i>=1))"
- line 280, "pan.___", state 1323, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1325, "(1)"
- line 280, "pan.___", state 1326, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1326, "else"
- line 284, "pan.___", state 1332, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1334, "(1)"
- line 284, "pan.___", state 1335, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1335, "else"
- line 282, "pan.___", state 1340, "((i<2))"
- line 282, "pan.___", state 1340, "((i>=2))"
- line 249, "pan.___", state 1348, "(1)"
- line 253, "pan.___", state 1356, "(1)"
- line 253, "pan.___", state 1357, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1357, "else"
- line 251, "pan.___", state 1362, "((i<1))"
- line 251, "pan.___", state 1362, "((i>=1))"
- line 257, "pan.___", state 1368, "(1)"
- line 257, "pan.___", state 1369, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1369, "else"
- line 261, "pan.___", state 1376, "(1)"
- line 261, "pan.___", state 1377, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1377, "else"
- line 266, "pan.___", state 1386, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1386, "else"
- line 299, "pan.___", state 1388, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1388, "else"
- line 1229, "pan.___", state 1389, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 1229, "pan.___", state 1389, "else"
- line 276, "pan.___", state 1402, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1415, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1424, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1440, "(1)"
- line 253, "pan.___", state 1448, "(1)"
- line 257, "pan.___", state 1460, "(1)"
- line 261, "pan.___", state 1468, "(1)"
- line 272, "pan.___", state 1499, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1508, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1521, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1530, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1546, "(1)"
- line 253, "pan.___", state 1554, "(1)"
- line 257, "pan.___", state 1566, "(1)"
- line 261, "pan.___", state 1574, "(1)"
- line 1237, "pan.___", state 1590, "-end-"
- (195 of 1590 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 982 seconds
-pan: rate 38391.44 states/second
-pan: avg transition delay 2.6765e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
+++ /dev/null
-#define SINGLE_FLIP
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4179
-2:3:4099
-3:3:4102
-4:3:4102
-5:3:4105
-6:3:4113
-7:3:4113
-8:3:4116
-9:3:4122
-10:3:4126
-11:3:4126
-12:3:4129
-13:3:4139
-14:3:4147
-15:3:4147
-16:3:4150
-17:3:4156
-18:3:4160
-19:3:4160
-20:3:4163
-21:3:4169
-22:3:4173
-23:3:4174
-24:0:4179
-25:3:4176
-26:0:4179
-27:2:2511
-28:0:4179
-29:2:2517
-30:0:4179
-31:2:2518
-32:0:4179
-33:2:2520
-34:0:4179
-35:2:2521
-36:0:4179
-37:2:2522
-38:0:4179
-39:2:2523
-40:0:4179
-41:2:2524
-42:0:4179
-43:2:2525
-44:0:4179
-45:2:2526
-46:2:2527
-47:2:2531
-48:2:2532
-49:2:2540
-50:2:2541
-51:2:2545
-52:2:2546
-53:2:2554
-54:2:2559
-55:2:2563
-56:2:2564
-57:2:2572
-58:2:2573
-59:2:2577
-60:2:2578
-61:2:2572
-62:2:2573
-63:2:2577
-64:2:2578
-65:2:2586
-66:2:2591
-67:2:2598
-68:2:2599
-69:2:2606
-70:2:2611
-71:2:2618
-72:2:2619
-73:2:2618
-74:2:2619
-75:2:2626
-76:2:2636
-77:0:4179
-78:2:2525
-79:0:4179
-80:2:2640
-81:2:2644
-82:2:2645
-83:2:2649
-84:2:2653
-85:2:2654
-86:2:2658
-87:2:2666
-88:2:2667
-89:2:2671
-90:2:2675
-91:2:2676
-92:2:2671
-93:2:2672
-94:2:2680
-95:0:4179
-96:2:2525
-97:0:4179
-98:2:2688
-99:2:2689
-100:2:2690
-101:0:4179
-102:2:2525
-103:0:4179
-104:2:2695
-105:0:4179
-106:2:3308
-107:2:3309
-108:2:3313
-109:2:3317
-110:2:3318
-111:2:3322
-112:2:3327
-113:2:3335
-114:2:3339
-115:2:3340
-116:2:3335
-117:2:3339
-118:2:3340
-119:2:3344
-120:2:3351
-121:2:3358
-122:2:3359
-123:2:3366
-124:2:3371
-125:2:3378
-126:2:3379
-127:2:3378
-128:2:3379
-129:2:3386
-130:2:3390
-131:0:4179
-132:2:3395
-133:0:4179
-134:2:3396
-135:0:4179
-136:2:3397
-137:0:4179
-138:2:3398
-139:0:4179
-140:1:2
-141:0:4179
-142:2:3399
-143:0:4179
-144:1:8
-145:0:4179
-146:1:9
-147:0:4179
-148:2:3398
-149:0:4179
-150:1:10
-151:0:4179
-152:2:3399
-153:0:4179
-154:1:11
-155:0:4179
-156:2:3398
-157:0:4179
-158:1:12
-159:0:4179
-160:2:3399
-161:0:4179
-162:1:13
-163:0:4179
-164:2:3398
-165:0:4179
-166:1:14
-167:0:4179
-168:2:3399
-169:0:4179
-170:1:15
-171:0:4179
-172:1:16
-173:0:4179
-174:2:3398
-175:0:4179
-176:1:17
-177:0:4179
-178:2:3399
-179:0:4179
-180:1:26
-181:0:4179
-182:2:3398
-183:0:4179
-184:1:30
-185:1:31
-186:1:35
-187:1:39
-188:1:40
-189:1:44
-190:1:52
-191:1:53
-192:1:57
-193:1:61
-194:1:62
-195:1:57
-196:1:61
-197:1:62
-198:1:66
-199:1:73
-200:1:80
-201:1:81
-202:1:88
-203:1:93
-204:1:100
-205:1:101
-206:1:100
-207:1:101
-208:1:108
-209:1:112
-210:0:4179
-211:2:3399
-212:0:4179
-213:1:117
-214:0:4179
-215:2:3400
-216:0:4179
-217:2:3405
-218:0:4179
-219:2:3406
-220:0:4179
-221:2:3414
-222:2:3415
-223:2:3419
-224:2:3423
-225:2:3424
-226:2:3428
-227:2:3436
-228:2:3437
-229:2:3441
-230:2:3445
-231:2:3446
-232:2:3441
-233:2:3445
-234:2:3446
-235:2:3450
-236:2:3457
-237:2:3464
-238:2:3465
-239:2:3472
-240:2:3477
-241:2:3484
-242:2:3485
-243:2:3484
-244:2:3485
-245:2:3492
-246:2:3496
-247:0:4179
-248:2:2697
-249:2:3289
-250:0:4179
-251:2:2525
-252:0:4179
-253:2:2698
-254:0:4179
-255:2:2525
-256:0:4179
-257:2:2701
-258:2:2702
-259:2:2706
-260:2:2707
-261:2:2715
-262:2:2716
-263:2:2720
-264:2:2721
-265:2:2729
-266:2:2734
-267:2:2738
-268:2:2739
-269:2:2747
-270:2:2748
-271:2:2752
-272:2:2753
-273:2:2747
-274:2:2748
-275:2:2752
-276:2:2753
-277:2:2761
-278:2:2766
-279:2:2773
-280:2:2774
-281:2:2781
-282:2:2786
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-1192:2:2572
-1193:2:2573
-1194:2:2577
-1195:2:2578
-1196:2:2572
-1197:2:2573
-1198:2:2574
-1199:2:2586
-1200:2:2591
-1201:2:2598
-1202:2:2599
-1203:2:2606
-1204:2:2611
-1205:2:2618
-1206:2:2619
-1207:2:2618
-1208:2:2619
-1209:2:2626
-1210:2:2636
-1211:0:4179
-1212:2:2525
-1213:0:4179
-1214:1:118
-1215:0:4179
-1216:1:120
-1217:0:4179
-1218:1:19
-1219:0:4179
-1220:1:1151
-1221:0:4179
-1222:1:2417
-1223:1:2424
-1224:1:2425
-1225:1:2432
-1226:1:2437
-1227:1:2444
-1228:1:2445
-1229:1:2444
-1230:1:2445
-1231:1:2452
-1232:1:2456
-1233:0:4179
-1234:2:2640
-1235:2:2644
-1236:2:2645
-1237:2:2649
-1238:2:2653
-1239:2:2654
-1240:2:2658
-1241:2:2666
-1242:2:2667
-1243:2:2671
-1244:2:2675
-1245:2:2676
-1246:2:2671
-1247:2:2672
-1248:2:2680
-1249:0:4179
-1250:2:2525
-1251:0:4179
-1252:2:2688
-1253:2:2689
-1254:2:2690
-1255:0:4179
-1256:2:2525
-1257:0:4179
-1258:2:2695
-1259:0:4179
-1260:2:3308
-1261:2:3309
-1262:2:3313
-1263:2:3317
-1264:2:3318
-1265:2:3322
-1266:2:3327
-1267:2:3335
-1268:2:3339
-1269:2:3340
-1270:2:3335
-1271:2:3339
-1272:2:3340
-1273:2:3344
-1274:2:3351
-1275:2:3358
-1276:2:3359
-1277:2:3366
-1278:2:3371
-1279:2:3378
-1280:2:3379
-1281:2:3378
-1282:2:3379
-1283:2:3386
-1284:2:3390
-1285:0:4179
-1286:2:3395
-1287:0:4179
-1288:2:3396
-1289:0:4179
-1290:2:3397
-1291:0:4179
-1292:2:3398
-1293:0:4179
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-1296:0:4177
-1297:2:3399
-1298:0:4183
-1299:1:2145
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-depth 23: Claim reached state 9 (line 1300)
-depth 51: Claim reached state 9 (line 1299)
-Depth= 7071 States= 1e+06 Transitions= 1.16e+07 Memory= 514.397 t= 30.7 R= 3e+04
-Depth= 7071 States= 2e+06 Transitions= 2.31e+07 Memory= 566.252 t= 61.5 R= 3e+04
-Depth= 7071 States= 3e+06 Transitions= 3.43e+07 Memory= 617.326 t= 91.6 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 8815 States= 4e+06 Transitions= 4.57e+07 Memory= 696.592 t= 122 R= 3e+04
-Depth= 8815 States= 5e+06 Transitions= 5.73e+07 Memory= 743.955 t= 153 R= 3e+04
-Depth= 8815 States= 6e+06 Transitions= 7.04e+07 Memory= 797.373 t= 190 R= 3e+04
-Depth= 8815 States= 7e+06 Transitions= 8.38e+07 Memory= 847.861 t= 226 R= 3e+04
-Depth= 8815 States= 8e+06 Transitions= 9.59e+07 Memory= 898.057 t= 259 R= 3e+04
-Depth= 8815 States= 9e+06 Transitions= 1.08e+08 Memory= 948.350 t= 293 R= 3e+04
-pan: resizing hashtable to -w24.. done
-Depth= 8815 States= 1e+07 Transitions= 1.29e+08 Memory= 1123.615 t= 352 R= 3e+04
-Depth= 8815 States= 1.1e+07 Transitions= 1.41e+08 Memory= 1175.764 t= 385 R= 3e+04
-Depth= 8815 States= 1.2e+07 Transitions= 1.53e+08 Memory= 1225.471 t= 417 R= 3e+04
-Depth= 8815 States= 1.3e+07 Transitions= 1.64e+08 Memory= 1276.057 t= 447 R= 3e+04
-Depth= 8815 States= 1.4e+07 Transitions= 1.75e+08 Memory= 1330.451 t= 477 R= 3e+04
-Depth= 8815 States= 1.5e+07 Transitions= 1.87e+08 Memory= 1379.670 t= 508 R= 3e+04
-Depth= 8815 States= 1.6e+07 Transitions= 1.98e+08 Memory= 1429.865 t= 538 R= 3e+04
-Depth= 8815 States= 1.7e+07 Transitions= 2.09e+08 Memory= 1484.748 t= 568 R= 3e+04
-Depth= 8815 States= 1.8e+07 Transitions= 2.23e+08 Memory= 1529.670 t= 606 R= 3e+04
-Depth= 8815 States= 1.9e+07 Transitions= 2.36e+08 Memory= 1579.377 t= 643 R= 3e+04
-Depth= 8815 States= 2e+07 Transitions= 2.57e+08 Memory= 1629.279 t= 701 R= 3e+04
-Depth= 8815 States= 2.1e+07 Transitions= 2.93e+08 Memory= 1686.115 t= 807 R= 3e+04
-Depth= 9016 States= 2.2e+07 Transitions= 3.11e+08 Memory= 1741.193 t= 858 R= 3e+04
-Depth= 9016 States= 2.3e+07 Transitions= 3.25e+08 Memory= 1793.733 t= 897 R= 3e+04
-Depth= 9016 States= 2.4e+07 Transitions= 3.45e+08 Memory= 1846.272 t= 954 R= 3e+04
-Depth= 9016 States= 2.5e+07 Transitions= 3.67e+08 Memory= 1897.639 t= 1.02e+03 R= 2e+04
-Depth= 9016 States= 2.6e+07 Transitions= 3.84e+08 Memory= 1951.447 t= 1.06e+03 R= 2e+04
-Depth= 9016 States= 2.7e+07 Transitions= 4.07e+08 Memory= 2004.670 t= 1.13e+03 R= 2e+04
-Depth= 9016 States= 2.8e+07 Transitions= 4.29e+08 Memory= 2050.764 t= 1.19e+03 R= 2e+04
-Depth= 9016 States= 2.9e+07 Transitions= 4.48e+08 Memory= 2100.373 t= 1.25e+03 R= 2e+04
-Depth= 9016 States= 3e+07 Transitions= 4.66e+08 Memory= 2151.545 t= 1.3e+03 R= 2e+04
-Depth= 9016 States= 3.1e+07 Transitions= 4.86e+08 Memory= 2201.838 t= 1.36e+03 R= 2e+04
-Depth= 9016 States= 3.2e+07 Transitions= 5.1e+08 Memory= 2250.861 t= 1.43e+03 R= 2e+04
-Depth= 9016 States= 3.3e+07 Transitions= 5.29e+08 Memory= 2299.983 t= 1.48e+03 R= 2e+04
-Depth= 9016 States= 3.4e+07 Transitions= 5.47e+08 Memory= 2351.057 t= 1.53e+03 R= 2e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9016 States= 3.5e+07 Transitions= 5.69e+08 Memory= 2896.943 t= 1.6e+03 R= 2e+04
-Depth= 9016 States= 3.6e+07 Transitions= 5.95e+08 Memory= 2945.186 t= 1.67e+03 R= 2e+04
-Depth= 9016 States= 3.7e+07 Transitions= 6.12e+08 Memory= 2995.576 t= 1.72e+03 R= 2e+04
-Depth= 9016 States= 3.8e+07 Transitions= 6.29e+08 Memory= 3042.256 t= 1.77e+03 R= 2e+04
-Depth= 9016 States= 3.9e+07 Transitions= 6.42e+08 Memory= 3093.135 t= 1.8e+03 R= 2e+04
-Depth= 9016 States= 4e+07 Transitions= 6.56e+08 Memory= 3146.651 t= 1.84e+03 R= 2e+04
-Depth= 9016 States= 4.1e+07 Transitions= 6.69e+08 Memory= 3202.901 t= 1.88e+03 R= 2e+04
-Depth= 9016 States= 4.2e+07 Transitions= 6.82e+08 Memory= 3254.951 t= 1.91e+03 R= 2e+04
-Depth= 9016 States= 4.3e+07 Transitions= 6.95e+08 Memory= 3309.053 t= 1.95e+03 R= 2e+04
-Depth= 9016 States= 4.4e+07 Transitions= 7.07e+08 Memory= 3360.615 t= 1.98e+03 R= 2e+04
-Depth= 9016 States= 4.5e+07 Transitions= 7.28e+08 Memory= 3410.713 t= 2.04e+03 R= 2e+04
-Depth= 9016 States= 4.6e+07 Transitions= 7.63e+08 Memory= 3466.963 t= 2.14e+03 R= 2e+04
-Depth= 9016 States= 4.7e+07 Transitions= 7.99e+08 Memory= 3532.295 t= 2.25e+03 R= 2e+04
-Depth= 9016 States= 4.8e+07 Transitions= 8.49e+08 Memory= 3594.307 t= 2.4e+03 R= 2e+04
-Depth= 9016 States= 4.9e+07 Transitions= 8.91e+08 Memory= 3646.455 t= 2.52e+03 R= 2e+04
-Depth= 9016 States= 5e+07 Transitions= 9.24e+08 Memory= 3689.912 t= 2.62e+03 R= 2e+04
-Depth= 9016 States= 5.1e+07 Transitions= 9.39e+08 Memory= 3742.940 t= 2.66e+03 R= 2e+04
-Depth= 9016 States= 5.2e+07 Transitions= 9.6e+08 Memory= 3793.721 t= 2.72e+03 R= 2e+04
-Depth= 9016 States= 5.3e+07 Transitions= 9.99e+08 Memory= 3843.721 t= 2.84e+03 R= 2e+04
-Depth= 9016 States= 5.4e+07 Transitions= 1.01e+09 Memory= 3899.287 t= 2.88e+03 R= 2e+04
-Depth= 9016 States= 5.5e+07 Transitions= 1.03e+09 Memory= 3947.627 t= 2.93e+03 R= 2e+04
-Depth= 9016 States= 5.6e+07 Transitions= 1.05e+09 Memory= 3995.479 t= 2.97e+03 R= 2e+04
-Depth= 9016 States= 5.7e+07 Transitions= 1.06e+09 Memory= 4049.776 t= 3.01e+03 R= 2e+04
-Depth= 9016 States= 5.8e+07 Transitions= 1.09e+09 Memory= 4100.947 t= 3.09e+03 R= 2e+04
-Depth= 9016 States= 5.9e+07 Transitions= 1.1e+09 Memory= 4151.533 t= 3.13e+03 R= 2e+04
-Depth= 9016 States= 6e+07 Transitions= 1.13e+09 Memory= 4201.924 t= 3.22e+03 R= 2e+04
-Depth= 9016 States= 6.1e+07 Transitions= 1.15e+09 Memory= 4251.240 t= 3.28e+03 R= 2e+04
-Depth= 9016 States= 6.2e+07 Transitions= 1.19e+09 Memory= 4303.779 t= 3.38e+03 R= 2e+04
-Depth= 9016 States= 6.3e+07 Transitions= 1.21e+09 Memory= 4352.998 t= 3.43e+03 R= 2e+04
-Depth= 9016 States= 6.4e+07 Transitions= 1.24e+09 Memory= 4403.096 t= 3.53e+03 R= 2e+04
-Depth= 9016 States= 6.5e+07 Transitions= 1.26e+09 Memory= 4453.682 t= 3.59e+03 R= 2e+04
-Depth= 9016 States= 6.6e+07 Transitions= 1.28e+09 Memory= 4503.096 t= 3.66e+03 R= 2e+04
-Depth= 9016 States= 6.7e+07 Transitions= 1.3e+09 Memory= 4554.072 t= 3.71e+03 R= 2e+04
-Depth= 9016 States= 6.8e+07 Transitions= 1.33e+09 Memory= 4604.951 t= 3.79e+03 R= 2e+04
-Depth= 9016 States= 6.9e+07 Transitions= 1.36e+09 Memory= 4656.221 t= 3.87e+03 R= 2e+04
-Depth= 9523 States= 7e+07 Transitions= 1.38e+09 Memory= 4712.959 t= 3.93e+03 R= 2e+04
-Depth= 9523 States= 7.1e+07 Transitions= 1.39e+09 Memory= 4759.443 t= 3.97e+03 R= 2e+04
-Depth= 9523 States= 7.2e+07 Transitions= 1.41e+09 Memory= 4814.033 t= 4.03e+03 R= 2e+04
-Depth= 9554 States= 7.3e+07 Transitions= 1.44e+09 Memory= 4868.037 t= 4.09e+03 R= 2e+04
-Depth= 9554 States= 7.4e+07 Transitions= 1.45e+09 Memory= 4915.401 t= 4.13e+03 R= 2e+04
-Depth= 9554 States= 7.5e+07 Transitions= 1.47e+09 Memory= 4970.479 t= 4.2e+03 R= 2e+04
-Depth= 9554 States= 7.6e+07 Transitions= 1.49e+09 Memory= 5022.334 t= 4.26e+03 R= 2e+04
-Depth= 9554 States= 7.7e+07 Transitions= 1.51e+09 Memory= 5071.358 t= 4.3e+03 R= 2e+04
-Depth= 9554 States= 7.8e+07 Transitions= 1.52e+09 Memory= 5124.971 t= 4.33e+03 R= 2e+04
-Depth= 9554 States= 7.9e+07 Transitions= 1.54e+09 Memory= 5178.779 t= 4.4e+03 R= 2e+04
-Depth= 9554 States= 8e+07 Transitions= 1.56e+09 Memory= 5231.221 t= 4.46e+03 R= 2e+04
-Depth= 9554 States= 8.1e+07 Transitions= 1.58e+09 Memory= 5284.541 t= 4.51e+03 R= 2e+04
-Depth= 9554 States= 8.2e+07 Transitions= 1.6e+09 Memory= 5335.029 t= 4.55e+03 R= 2e+04
-Depth= 9554 States= 8.3e+07 Transitions= 1.61e+09 Memory= 5385.908 t= 4.6e+03 R= 2e+04
-Depth= 9554 States= 8.4e+07 Transitions= 1.63e+09 Memory= 5437.276 t= 4.64e+03 R= 2e+04
-Depth= 9554 States= 8.5e+07 Transitions= 1.65e+09 Memory= 5486.787 t= 4.69e+03 R= 2e+04
-Depth= 9554 States= 8.6e+07 Transitions= 1.67e+09 Memory= 5535.615 t= 4.76e+03 R= 2e+04
-Depth= 9554 States= 8.7e+07 Transitions= 1.69e+09 Memory= 5589.522 t= 4.81e+03 R= 2e+04
-Depth= 9554 States= 8.8e+07 Transitions= 1.7e+09 Memory= 5647.627 t= 4.86e+03 R= 2e+04
-Depth= 9554 States= 8.9e+07 Transitions= 1.72e+09 Memory= 5695.967 t= 4.9e+03 R= 2e+04
-Depth= 9554 States= 9e+07 Transitions= 1.74e+09 Memory= 5749.971 t= 4.95e+03 R= 2e+04
-Depth= 9554 States= 9.1e+07 Transitions= 1.76e+09 Memory= 5799.483 t= 5.01e+03 R= 2e+04
-Depth= 9554 States= 9.2e+07 Transitions= 1.78e+09 Memory= 5849.092 t= 5.06e+03 R= 2e+04
-Depth= 9554 States= 9.3e+07 Transitions= 1.8e+09 Memory= 5897.529 t= 5.12e+03 R= 2e+04
-Depth= 9554 States= 9.4e+07 Transitions= 1.82e+09 Memory= 5949.287 t= 5.19e+03 R= 2e+04
-Depth= 9554 States= 9.5e+07 Transitions= 1.84e+09 Memory= 6004.072 t= 5.25e+03 R= 2e+04
-Depth= 9554 States= 9.6e+07 Transitions= 1.86e+09 Memory= 6052.412 t= 5.29e+03 R= 2e+04
-Depth= 9554 States= 9.7e+07 Transitions= 1.88e+09 Memory= 6107.588 t= 5.36e+03 R= 2e+04
-Depth= 9554 States= 9.8e+07 Transitions= 1.9e+09 Memory= 6160.029 t= 5.4e+03 R= 2e+04
-Depth= 9554 States= 9.9e+07 Transitions= 1.91e+09 Memory= 6211.006 t= 5.44e+03 R= 2e+04
-Depth= 9554 States= 1e+08 Transitions= 1.93e+09 Memory= 6262.861 t= 5.49e+03 R= 2e+04
-Depth= 9554 States= 1.01e+08 Transitions= 1.94e+09 Memory= 6317.256 t= 5.54e+03 R= 2e+04
-Depth= 9554 States= 1.02e+08 Transitions= 1.96e+09 Memory= 6371.455 t= 5.58e+03 R= 2e+04
-Depth= 9554 States= 1.03e+08 Transitions= 1.98e+09 Memory= 6423.311 t= 5.64e+03 R= 2e+04
-Depth= 9554 States= 1.04e+08 Transitions= 2e+09 Memory= 6477.608 t= 5.71e+03 R= 2e+04
-Depth= 9554 States= 1.05e+08 Transitions= 2.02e+09 Memory= 6526.045 t= 5.75e+03 R= 2e+04
-Depth= 9554 States= 1.06e+08 Transitions= 2.04e+09 Memory= 6580.733 t= 5.81e+03 R= 2e+04
-Depth= 9554 States= 1.07e+08 Transitions= 2.06e+09 Memory= 6634.053 t= 5.87e+03 R= 2e+04
-Depth= 9554 States= 1.08e+08 Transitions= 2.07e+09 Memory= 6685.127 t= 5.9e+03 R= 2e+04
-Depth= 9554 States= 1.09e+08 Transitions= 2.09e+09 Memory= 6736.299 t= 5.96e+03 R= 2e+04
-Depth= 9554 States= 1.1e+08 Transitions= 2.11e+09 Memory= 6790.401 t= 6e+03 R= 2e+04
-Depth= 9554 States= 1.11e+08 Transitions= 2.12e+09 Memory= 6844.990 t= 6.05e+03 R= 2e+04
-Depth= 9554 States= 1.12e+08 Transitions= 2.14e+09 Memory= 6890.010 t= 6.09e+03 R= 2e+04
-Depth= 9554 States= 1.13e+08 Transitions= 2.16e+09 Memory= 6940.889 t= 6.14e+03 R= 2e+04
-Depth= 9554 States= 1.14e+08 Transitions= 2.17e+09 Memory= 6992.061 t= 6.19e+03 R= 2e+04
-Depth= 9554 States= 1.15e+08 Transitions= 2.19e+09 Memory= 7043.623 t= 6.24e+03 R= 2e+04
-Depth= 9554 States= 1.16e+08 Transitions= 2.21e+09 Memory= 7095.186 t= 6.28e+03 R= 2e+04
-Depth= 9554 States= 1.17e+08 Transitions= 2.23e+09 Memory= 7144.600 t= 6.36e+03 R= 2e+04
-Depth= 9554 States= 1.18e+08 Transitions= 2.27e+09 Memory= 7198.897 t= 6.46e+03 R= 2e+04
-Depth= 9554 States= 1.19e+08 Transitions= 2.29e+09 Memory= 7253.779 t= 6.52e+03 R= 2e+04
-Depth= 9554 States= 1.2e+08 Transitions= 2.3e+09 Memory= 7307.783 t= 6.56e+03 R= 2e+04
-Depth= 9554 States= 1.21e+08 Transitions= 2.32e+09 Memory= 7358.467 t= 6.62e+03 R= 2e+04
-Depth= 9554 States= 1.22e+08 Transitions= 2.34e+09 Memory= 7410.811 t= 6.67e+03 R= 2e+04
-Depth= 9554 States= 1.23e+08 Transitions= 2.36e+09 Memory= 7465.010 t= 6.72e+03 R= 2e+04
-Depth= 9554 States= 1.24e+08 Transitions= 2.38e+09 Memory= 7516.670 t= 6.78e+03 R= 2e+04
-Depth= 9554 States= 1.25e+08 Transitions= 2.41e+09 Memory= 7565.205 t= 6.87e+03 R= 2e+04
-Depth= 9554 States= 1.26e+08 Transitions= 2.43e+09 Memory= 7613.936 t= 6.93e+03 R= 2e+04
-Depth= 9554 States= 1.27e+08 Transitions= 2.45e+09 Memory= 7662.471 t= 7e+03 R= 2e+04
-Depth= 9554 States= 1.28e+08 Transitions= 2.48e+09 Memory= 7710.713 t= 7.08e+03 R= 2e+04
-Depth= 9554 States= 1.29e+08 Transitions= 2.5e+09 Memory= 7759.346 t= 7.14e+03 R= 2e+04
-Depth= 9554 States= 1.3e+08 Transitions= 2.52e+09 Memory= 7810.322 t= 7.2e+03 R= 2e+04
-Depth= 9554 States= 1.31e+08 Transitions= 2.55e+09 Memory= 7859.834 t= 7.26e+03 R= 2e+04
-Depth= 9554 States= 1.32e+08 Transitions= 2.57e+09 Memory= 7910.615 t= 7.33e+03 R= 2e+04
-Depth= 9554 States= 1.33e+08 Transitions= 2.59e+09 Memory= 7959.248 t= 7.4e+03 R= 2e+04
-Depth= 9554 States= 1.34e+08 Transitions= 2.61e+09 Memory= 8011.787 t= 7.46e+03 R= 2e+04
-Depth= 9554 States= 1.35e+08 Transitions= 2.63e+09 Memory= 8060.713 t= 7.51e+03 R= 2e+04
-pan: resizing hashtable to -w28.. done
-Depth= 9554 States= 1.36e+08 Transitions= 2.65e+09 Memory= 10108.713 t= 7.58e+03 R= 2e+04
-Depth= 9554 States= 1.37e+08 Transitions= 2.66e+09 Memory= 10144.455 t= 7.62e+03 R= 2e+04
-Depth= 9554 States= 1.38e+08 Transitions= 2.67e+09 Memory= 10199.143 t= 7.65e+03 R= 2e+04
-Depth= 9554 States= 1.39e+08 Transitions= 2.69e+09 Memory= 10253.830 t= 7.69e+03 R= 2e+04
-Depth= 9554 States= 1.4e+08 Transitions= 2.7e+09 Memory= 10308.127 t= 7.74e+03 R= 2e+04
-Depth= 9554 States= 1.41e+08 Transitions= 2.72e+09 Memory= 10360.178 t= 7.78e+03 R= 2e+04
-Depth= 9554 States= 1.42e+08 Transitions= 2.74e+09 Memory= 10413.889 t= 7.83e+03 R= 2e+04
-Depth= 9554 States= 1.43e+08 Transitions= 2.75e+09 Memory= 10467.111 t= 7.87e+03 R= 2e+04
-Depth= 9554 States= 1.44e+08 Transitions= 2.77e+09 Memory= 10518.088 t= 7.92e+03 R= 2e+04
-Depth= 9554 States= 1.45e+08 Transitions= 2.79e+09 Memory= 10567.795 t= 7.98e+03 R= 2e+04
-Depth= 9554 States= 1.46e+08 Transitions= 2.82e+09 Memory= 10624.631 t= 8.08e+03 R= 2e+04
-Depth= 9554 States= 1.47e+08 Transitions= 2.86e+09 Memory= 10689.963 t= 8.19e+03 R= 2e+04
-Depth= 9554 States= 1.48e+08 Transitions= 2.91e+09 Memory= 10752.072 t= 8.34e+03 R= 2e+04
-Depth= 9554 States= 1.49e+08 Transitions= 2.95e+09 Memory= 10802.658 t= 8.46e+03 R= 2e+04
-Depth= 9554 States= 1.5e+08 Transitions= 2.99e+09 Memory= 10848.361 t= 8.56e+03 R= 2e+04
-Depth= 9554 States= 1.51e+08 Transitions= 3e+09 Memory= 10900.022 t= 8.61e+03 R= 2e+04
-Depth= 9554 States= 1.52e+08 Transitions= 3.02e+09 Memory= 10951.096 t= 8.66e+03 R= 2e+04
-Depth= 9554 States= 1.53e+08 Transitions= 3.05e+09 Memory= 11002.365 t= 8.75e+03 R= 2e+04
-Depth= 9554 States= 1.54e+08 Transitions= 3.08e+09 Memory= 11054.611 t= 8.83e+03 R= 2e+04
-Depth= 9554 States= 1.55e+08 Transitions= 3.1e+09 Memory= 11105.783 t= 8.88e+03 R= 2e+04
-Depth= 9554 States= 1.56e+08 Transitions= 3.11e+09 Memory= 11153.830 t= 8.92e+03 R= 2e+04
-Depth= 9554 States= 1.57e+08 Transitions= 3.13e+09 Memory= 11202.365 t= 8.96e+03 R= 2e+04
-Depth= 9554 States= 1.58e+08 Transitions= 3.14e+09 Memory= 11257.443 t= 9e+03 R= 2e+04
-Depth= 9554 States= 1.59e+08 Transitions= 3.17e+09 Memory= 11307.639 t= 9.08e+03 R= 2e+04
-Depth= 9554 States= 1.6e+08 Transitions= 3.19e+09 Memory= 11357.541 t= 9.15e+03 R= 2e+04
-Depth= 9554 States= 1.61e+08 Transitions= 3.21e+09 Memory= 11407.541 t= 9.21e+03 R= 2e+04
-Depth= 9554 States= 1.62e+08 Transitions= 3.24e+09 Memory= 11457.736 t= 9.28e+03 R= 2e+04
-Depth= 9554 States= 1.63e+08 Transitions= 3.27e+09 Memory= 11507.053 t= 9.36e+03 R= 2e+04
-Depth= 9554 States= 1.64e+08 Transitions= 3.29e+09 Memory= 11560.959 t= 9.44e+03 R= 2e+04
-Depth= 9554 States= 1.65e+08 Transitions= 3.31e+09 Memory= 11613.108 t= 9.5e+03 R= 2e+04
-Depth= 9554 States= 1.66e+08 Transitions= 3.34e+09 Memory= 11661.252 t= 9.58e+03 R= 2e+04
-Depth= 9554 States= 1.67e+08 Transitions= 3.37e+09 Memory= 11711.154 t= 9.66e+03 R= 2e+04
-Depth= 9554 States= 1.68e+08 Transitions= 3.39e+09 Memory= 11763.596 t= 9.72e+03 R= 2e+04
-Depth= 9554 States= 1.69e+08 Transitions= 3.41e+09 Memory= 11812.912 t= 9.78e+03 R= 2e+04
-Depth= 9554 States= 1.7e+08 Transitions= 3.44e+09 Memory= 11866.135 t= 9.87e+03 R= 2e+04
-Depth= 9554 States= 1.71e+08 Transitions= 3.46e+09 Memory= 11920.139 t= 9.91e+03 R= 2e+04
-Depth= 9554 States= 1.72e+08 Transitions= 3.47e+09 Memory= 11967.014 t= 9.95e+03 R= 2e+04
-Depth= 9554 States= 1.73e+08 Transitions= 3.5e+09 Memory= 12021.115 t= 1e+04 R= 2e+04
-Depth= 9554 States= 1.74e+08 Transitions= 3.52e+09 Memory= 12075.315 t= 1.01e+04 R= 2e+04
-Depth= 9554 States= 1.75e+08 Transitions= 3.53e+09 Memory= 12126.779 t= 1.01e+04 R= 2e+04
-Depth= 9554 States= 1.76e+08 Transitions= 3.56e+09 Memory= 12180.002 t= 1.02e+04 R= 2e+04
-Depth= 9554 States= 1.77e+08 Transitions= 3.57e+09 Memory= 12229.416 t= 1.02e+04 R= 2e+04
-Depth= 9554 States= 1.78e+08 Transitions= 3.59e+09 Memory= 12282.834 t= 1.03e+04 R= 2e+04
-Depth= 9554 States= 1.79e+08 Transitions= 3.61e+09 Memory= 12334.494 t= 1.03e+04 R= 2e+04
-Depth= 9554 States= 1.8e+08 Transitions= 3.63e+09 Memory= 12387.522 t= 1.04e+04 R= 2e+04
-Depth= 9554 States= 1.81e+08 Transitions= 3.65e+09 Memory= 12440.451 t= 1.05e+04 R= 2e+04
-Depth= 9554 States= 1.82e+08 Transitions= 3.66e+09 Memory= 12492.111 t= 1.05e+04 R= 2e+04
-Depth= 9554 States= 1.83e+08 Transitions= 3.68e+09 Memory= 12544.162 t= 1.05e+04 R= 2e+04
-Depth= 9554 States= 1.84e+08 Transitions= 3.69e+09 Memory= 12594.943 t= 1.06e+04 R= 2e+04
-Depth= 9554 States= 1.85e+08 Transitions= 3.71e+09 Memory= 12645.627 t= 1.06e+04 R= 2e+04
-Depth= 9554 States= 1.86e+08 Transitions= 3.73e+09 Memory= 12695.236 t= 1.07e+04 R= 2e+04
-Depth= 9554 States= 1.87e+08 Transitions= 3.75e+09 Memory= 12750.705 t= 1.07e+04 R= 2e+04
-Depth= 9554 States= 1.88e+08 Transitions= 3.77e+09 Memory= 12807.639 t= 1.08e+04 R= 2e+04
-Depth= 9554 States= 1.89e+08 Transitions= 3.78e+09 Memory= 12855.979 t= 1.08e+04 R= 2e+04
-Depth= 9554 States= 1.9e+08 Transitions= 3.8e+09 Memory= 12909.592 t= 1.09e+04 R= 2e+04
-Depth= 9554 States= 1.91e+08 Transitions= 3.82e+09 Memory= 12959.104 t= 1.09e+04 R= 2e+04
-Depth= 9554 States= 1.92e+08 Transitions= 3.84e+09 Memory= 13008.615 t= 1.1e+04 R= 2e+04
-Depth= 9554 States= 1.93e+08 Transitions= 3.86e+09 Memory= 13065.061 t= 1.11e+04 R= 2e+04
-Depth= 9554 States= 1.94e+08 Transitions= 3.88e+09 Memory= 13114.377 t= 1.11e+04 R= 2e+04
-Depth= 9554 States= 1.95e+08 Transitions= 3.9e+09 Memory= 13168.674 t= 1.12e+04 R= 2e+04
-Depth= 9554 States= 1.96e+08 Transitions= 3.92e+09 Memory= 13222.678 t= 1.12e+04 R= 2e+04
-Depth= 9554 States= 1.97e+08 Transitions= 3.93e+09 Memory= 13271.701 t= 1.13e+04 R= 2e+04
-Depth= 9554 States= 1.98e+08 Transitions= 3.95e+09 Memory= 13324.338 t= 1.13e+04 R= 2e+04
-Depth= 9554 States= 1.99e+08 Transitions= 3.96e+09 Memory= 13377.170 t= 1.13e+04 R= 2e+04
-Depth= 9554 States= 2e+08 Transitions= 3.98e+09 Memory= 13432.639 t= 1.14e+04 R= 2e+04
-Depth= 9554 States= 2.01e+08 Transitions= 4e+09 Memory= 13483.811 t= 1.14e+04 R= 2e+04
-Depth= 9554 States= 2.02e+08 Transitions= 4.03e+09 Memory= 13537.522 t= 1.15e+04 R= 2e+04
-Depth= 9554 States= 2.03e+08 Transitions= 4.04e+09 Memory= 13588.693 t= 1.16e+04 R= 2e+04
-Depth= 9554 States= 2.04e+08 Transitions= 4.06e+09 Memory= 13642.600 t= 1.16e+04 R= 2e+04
-Depth= 9554 States= 2.05e+08 Transitions= 4.08e+09 Memory= 13696.799 t= 1.17e+04 R= 2e+04
-Depth= 9554 States= 2.06e+08 Transitions= 4.09e+09 Memory= 13744.748 t= 1.17e+04 R= 2e+04
-Depth= 9554 States= 2.07e+08 Transitions= 4.11e+09 Memory= 13798.068 t= 1.18e+04 R= 2e+04
-Depth= 9554 States= 2.08e+08 Transitions= 4.13e+09 Memory= 13850.022 t= 1.18e+04 R= 2e+04
-Depth= 9554 States= 2.09e+08 Transitions= 4.14e+09 Memory= 13905.783 t= 1.18e+04 R= 2e+04
-Depth= 9554 States= 2.1e+08 Transitions= 4.16e+09 Memory= 13952.365 t= 1.19e+04 R= 2e+04
-Depth= 9554 States= 2.11e+08 Transitions= 4.18e+09 Memory= 14003.244 t= 1.19e+04 R= 2e+04
-Depth= 9554 States= 2.12e+08 Transitions= 4.19e+09 Memory= 14054.318 t= 1.2e+04 R= 2e+04
-Depth= 9554 States= 2.13e+08 Transitions= 4.21e+09 Memory= 14106.076 t= 1.2e+04 R= 2e+04
-Depth= 9554 States= 2.14e+08 Transitions= 4.22e+09 Memory= 14156.662 t= 1.21e+04 R= 2e+04
-Depth= 9554 States= 2.15e+08 Transitions= 4.26e+09 Memory= 14209.690 t= 1.22e+04 R= 2e+04
-Depth= 9554 States= 2.16e+08 Transitions= 4.29e+09 Memory= 14265.256 t= 1.23e+04 R= 2e+04
-Depth= 9554 States= 2.17e+08 Transitions= 4.3e+09 Memory= 14317.697 t= 1.23e+04 R= 2e+04
-Depth= 9554 States= 2.18e+08 Transitions= 4.32e+09 Memory= 14371.311 t= 1.23e+04 R= 2e+04
-Depth= 9554 States= 2.19e+08 Transitions= 4.33e+09 Memory= 14424.045 t= 1.24e+04 R= 2e+04
-Depth= 9554 States= 2.2e+08 Transitions= 4.35e+09 Memory= 14477.854 t= 1.24e+04 R= 2e+04
-Depth= 9554 States= 2.21e+08 Transitions= 4.37e+09 Memory= 14529.611 t= 1.25e+04 R= 2e+04
-Depth= 9554 States= 2.22e+08 Transitions= 4.4e+09 Memory= 14576.291 t= 1.26e+04 R= 2e+04
-Depth= 9554 States= 2.23e+08 Transitions= 4.43e+09 Memory= 14625.608 t= 1.27e+04 R= 2e+04
-Depth= 9554 States= 2.24e+08 Transitions= 4.45e+09 Memory= 14674.045 t= 1.27e+04 R= 2e+04
-Depth= 9554 States= 2.25e+08 Transitions= 4.48e+09 Memory= 14722.776 t= 1.28e+04 R= 2e+04
-Depth= 9554 States= 2.26e+08 Transitions= 4.5e+09 Memory= 14770.529 t= 1.29e+04 R= 2e+04
-Depth= 9554 States= 2.27e+08 Transitions= 4.52e+09 Memory= 14821.018 t= 1.29e+04 R= 2e+04
-Depth= 9554 States= 2.28e+08 Transitions= 4.54e+09 Memory= 14870.529 t= 1.3e+04 R= 2e+04
-Depth= 9554 States= 2.29e+08 Transitions= 4.56e+09 Memory= 14918.967 t= 1.3e+04 R= 2e+04
-Depth= 9554 States= 2.3e+08 Transitions= 4.59e+09 Memory= 14966.916 t= 1.31e+04 R= 2e+04
-Depth= 9554 States= 2.31e+08 Transitions= 4.6e+09 Memory= 15017.600 t= 1.32e+04 R= 2e+04
-Depth= 9554 States= 2.32e+08 Transitions= 4.63e+09 Memory= 15066.330 t= 1.32e+04 R= 2e+04
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 4473 States= 1e+06 Transitions= 2.37e+07 Memory= 542.619 t= 57.3 R= 2e+04
-Depth= 4540 States= 2e+06 Transitions= 4.8e+07 Memory= 618.889 t= 117 R= 2e+04
-Depth= 4540 States= 3e+06 Transitions= 7.25e+07 Memory= 695.158 t= 178 R= 2e+04
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 72 byte, depth reached 4540, errors: 0
- 3841511 states, stored
- 90242688 states, matched
- 94084199 transitions (= stored+matched)
-1.5073578e+09 atomic steps
-hash conflicts: 63759942 (resolved)
-
-Stats on memory usage (in Megabytes):
- 366.355 equivalent memory usage for states (stored*(State-vector + overhead))
- 300.680 actual memory usage for states (compression: 82.07%)
- state-vector as stored = 54 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 790.440 total actual memory usage
-
-unreached in proctype urcu_reader
- line 410, ".input.spin", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 81, "(1)"
- line 256, ".input.spin", state 101, "(1)"
- line 260, ".input.spin", state 109, "(1)"
- line 596, ".input.spin", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 410, ".input.spin", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 199, "(1)"
- line 256, ".input.spin", state 219, "(1)"
- line 260, ".input.spin", state 227, "(1)"
- line 410, ".input.spin", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 310, "(1)"
- line 256, ".input.spin", state 330, "(1)"
- line 260, ".input.spin", state 338, "(1)"
- line 410, ".input.spin", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 361, "(1)"
- line 410, ".input.spin", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, ".input.spin", state 362, "else"
- line 410, ".input.spin", state 365, "(1)"
- line 414, ".input.spin", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 375, "(1)"
- line 414, ".input.spin", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, ".input.spin", state 376, "else"
- line 414, ".input.spin", state 379, "(1)"
- line 414, ".input.spin", state 380, "(1)"
- line 414, ".input.spin", state 380, "(1)"
- line 412, ".input.spin", state 385, "((i<1))"
- line 412, ".input.spin", state 385, "((i>=1))"
- line 419, ".input.spin", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 393, "(1)"
- line 419, ".input.spin", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, ".input.spin", state 394, "else"
- line 419, ".input.spin", state 397, "(1)"
- line 419, ".input.spin", state 398, "(1)"
- line 419, ".input.spin", state 398, "(1)"
- line 423, ".input.spin", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 407, "(1)"
- line 423, ".input.spin", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, ".input.spin", state 408, "else"
- line 423, ".input.spin", state 411, "(1)"
- line 423, ".input.spin", state 412, "(1)"
- line 423, ".input.spin", state 412, "(1)"
- line 421, ".input.spin", state 417, "((i<2))"
- line 421, ".input.spin", state 417, "((i>=2))"
- line 248, ".input.spin", state 423, "(1)"
- line 252, ".input.spin", state 431, "(1)"
- line 252, ".input.spin", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, ".input.spin", state 432, "else"
- line 250, ".input.spin", state 437, "((i<1))"
- line 250, ".input.spin", state 437, "((i>=1))"
- line 256, ".input.spin", state 443, "(1)"
- line 256, ".input.spin", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, ".input.spin", state 444, "else"
- line 260, ".input.spin", state 451, "(1)"
- line 260, ".input.spin", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, ".input.spin", state 452, "else"
- line 258, ".input.spin", state 457, "((i<2))"
- line 258, ".input.spin", state 457, "((i>=2))"
- line 265, ".input.spin", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, ".input.spin", state 461, "else"
- line 430, ".input.spin", state 463, "(1)"
- line 430, ".input.spin", state 463, "(1)"
- line 596, ".input.spin", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 596, ".input.spin", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 596, ".input.spin", state 468, "(1)"
- line 271, ".input.spin", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 483, "(1)"
- line 279, ".input.spin", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 519, "(1)"
- line 252, ".input.spin", state 527, "(1)"
- line 256, ".input.spin", state 539, "(1)"
- line 260, ".input.spin", state 547, "(1)"
- line 410, ".input.spin", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 629, "(1)"
- line 252, ".input.spin", state 637, "(1)"
- line 256, ".input.spin", state 649, "(1)"
- line 260, ".input.spin", state 657, "(1)"
- line 410, ".input.spin", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 747, "(1)"
- line 256, ".input.spin", state 767, "(1)"
- line 260, ".input.spin", state 775, "(1)"
- line 410, ".input.spin", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 796, "(1)"
- line 410, ".input.spin", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, ".input.spin", state 797, "else"
- line 410, ".input.spin", state 800, "(1)"
- line 414, ".input.spin", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 810, "(1)"
- line 414, ".input.spin", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, ".input.spin", state 811, "else"
- line 414, ".input.spin", state 814, "(1)"
- line 414, ".input.spin", state 815, "(1)"
- line 414, ".input.spin", state 815, "(1)"
- line 412, ".input.spin", state 820, "((i<1))"
- line 412, ".input.spin", state 820, "((i>=1))"
- line 419, ".input.spin", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 828, "(1)"
- line 419, ".input.spin", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, ".input.spin", state 829, "else"
- line 419, ".input.spin", state 832, "(1)"
- line 419, ".input.spin", state 833, "(1)"
- line 419, ".input.spin", state 833, "(1)"
- line 423, ".input.spin", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 842, "(1)"
- line 423, ".input.spin", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, ".input.spin", state 843, "else"
- line 423, ".input.spin", state 846, "(1)"
- line 423, ".input.spin", state 847, "(1)"
- line 423, ".input.spin", state 847, "(1)"
- line 421, ".input.spin", state 852, "((i<2))"
- line 421, ".input.spin", state 852, "((i>=2))"
- line 248, ".input.spin", state 858, "(1)"
- line 252, ".input.spin", state 866, "(1)"
- line 252, ".input.spin", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, ".input.spin", state 867, "else"
- line 250, ".input.spin", state 872, "((i<1))"
- line 250, ".input.spin", state 872, "((i>=1))"
- line 256, ".input.spin", state 878, "(1)"
- line 256, ".input.spin", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, ".input.spin", state 879, "else"
- line 260, ".input.spin", state 886, "(1)"
- line 260, ".input.spin", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, ".input.spin", state 887, "else"
- line 258, ".input.spin", state 892, "((i<2))"
- line 258, ".input.spin", state 892, "((i>=2))"
- line 265, ".input.spin", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, ".input.spin", state 896, "else"
- line 430, ".input.spin", state 898, "(1)"
- line 430, ".input.spin", state 898, "(1)"
- line 604, ".input.spin", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 410, ".input.spin", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 971, "(1)"
- line 252, ".input.spin", state 979, "(1)"
- line 256, ".input.spin", state 991, "(1)"
- line 260, ".input.spin", state 999, "(1)"
- line 410, ".input.spin", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1085, "(1)"
- line 256, ".input.spin", state 1105, "(1)"
- line 260, ".input.spin", state 1113, "(1)"
- line 410, ".input.spin", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1200, "(1)"
- line 256, ".input.spin", state 1220, "(1)"
- line 260, ".input.spin", state 1228, "(1)"
- line 410, ".input.spin", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1311, "(1)"
- line 256, ".input.spin", state 1331, "(1)"
- line 260, ".input.spin", state 1339, "(1)"
- line 271, ".input.spin", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1407, "(1)"
- line 252, ".input.spin", state 1415, "(1)"
- line 256, ".input.spin", state 1427, "(1)"
- line 260, ".input.spin", state 1435, "(1)"
- line 410, ".input.spin", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1517, "(1)"
- line 252, ".input.spin", state 1525, "(1)"
- line 256, ".input.spin", state 1537, "(1)"
- line 260, ".input.spin", state 1545, "(1)"
- line 410, ".input.spin", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1628, "(1)"
- line 252, ".input.spin", state 1636, "(1)"
- line 256, ".input.spin", state 1648, "(1)"
- line 260, ".input.spin", state 1656, "(1)"
- line 410, ".input.spin", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1742, "(1)"
- line 256, ".input.spin", state 1762, "(1)"
- line 260, ".input.spin", state 1770, "(1)"
- line 643, ".input.spin", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 410, ".input.spin", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1860, "(1)"
- line 256, ".input.spin", state 1880, "(1)"
- line 260, ".input.spin", state 1888, "(1)"
- line 410, ".input.spin", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1971, "(1)"
- line 256, ".input.spin", state 1991, "(1)"
- line 260, ".input.spin", state 1999, "(1)"
- line 410, ".input.spin", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 2022, "(1)"
- line 410, ".input.spin", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, ".input.spin", state 2023, "else"
- line 410, ".input.spin", state 2026, "(1)"
- line 414, ".input.spin", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2036, "(1)"
- line 414, ".input.spin", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, ".input.spin", state 2037, "else"
- line 414, ".input.spin", state 2040, "(1)"
- line 414, ".input.spin", state 2041, "(1)"
- line 414, ".input.spin", state 2041, "(1)"
- line 412, ".input.spin", state 2046, "((i<1))"
- line 412, ".input.spin", state 2046, "((i>=1))"
- line 419, ".input.spin", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2054, "(1)"
- line 419, ".input.spin", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, ".input.spin", state 2055, "else"
- line 419, ".input.spin", state 2058, "(1)"
- line 419, ".input.spin", state 2059, "(1)"
- line 419, ".input.spin", state 2059, "(1)"
- line 423, ".input.spin", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2068, "(1)"
- line 423, ".input.spin", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, ".input.spin", state 2069, "else"
- line 423, ".input.spin", state 2072, "(1)"
- line 423, ".input.spin", state 2073, "(1)"
- line 423, ".input.spin", state 2073, "(1)"
- line 421, ".input.spin", state 2078, "((i<2))"
- line 421, ".input.spin", state 2078, "((i>=2))"
- line 248, ".input.spin", state 2084, "(1)"
- line 252, ".input.spin", state 2092, "(1)"
- line 252, ".input.spin", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, ".input.spin", state 2093, "else"
- line 250, ".input.spin", state 2098, "((i<1))"
- line 250, ".input.spin", state 2098, "((i>=1))"
- line 256, ".input.spin", state 2104, "(1)"
- line 256, ".input.spin", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, ".input.spin", state 2105, "else"
- line 260, ".input.spin", state 2112, "(1)"
- line 260, ".input.spin", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, ".input.spin", state 2113, "else"
- line 258, ".input.spin", state 2118, "((i<2))"
- line 258, ".input.spin", state 2118, "((i>=2))"
- line 265, ".input.spin", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, ".input.spin", state 2122, "else"
- line 430, ".input.spin", state 2124, "(1)"
- line 430, ".input.spin", state 2124, "(1)"
- line 643, ".input.spin", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 643, ".input.spin", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 643, ".input.spin", state 2129, "(1)"
- line 271, ".input.spin", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2180, "(1)"
- line 252, ".input.spin", state 2188, "(1)"
- line 256, ".input.spin", state 2200, "(1)"
- line 260, ".input.spin", state 2208, "(1)"
- line 410, ".input.spin", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2290, "(1)"
- line 252, ".input.spin", state 2298, "(1)"
- line 256, ".input.spin", state 2310, "(1)"
- line 260, ".input.spin", state 2318, "(1)"
- line 271, ".input.spin", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2387, "(1)"
- line 252, ".input.spin", state 2395, "(1)"
- line 256, ".input.spin", state 2407, "(1)"
- line 260, ".input.spin", state 2415, "(1)"
- line 410, ".input.spin", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2497, "(1)"
- line 252, ".input.spin", state 2505, "(1)"
- line 256, ".input.spin", state 2517, "(1)"
- line 260, ".input.spin", state 2525, "(1)"
- line 410, ".input.spin", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 2608, "(1)"
- line 252, ".input.spin", state 2616, "(1)"
- line 256, ".input.spin", state 2628, "(1)"
- line 260, ".input.spin", state 2636, "(1)"
- line 248, ".input.spin", state 2667, "(1)"
- line 256, ".input.spin", state 2687, "(1)"
- line 260, ".input.spin", state 2695, "(1)"
- line 248, ".input.spin", state 2710, "(1)"
- line 252, ".input.spin", state 2718, "(1)"
- line 256, ".input.spin", state 2730, "(1)"
- line 260, ".input.spin", state 2738, "(1)"
- line 897, ".input.spin", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 410, ".input.spin", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 82, "(1)"
- line 252, ".input.spin", state 90, "(1)"
- line 256, ".input.spin", state 102, "(1)"
- line 271, ".input.spin", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 410, ".input.spin", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, ".input.spin", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 257, "(1)"
- line 252, ".input.spin", state 265, "(1)"
- line 256, ".input.spin", state 277, "(1)"
- line 260, ".input.spin", state 285, "(1)"
- line 414, ".input.spin", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, ".input.spin", state 378, "(1)"
- line 256, ".input.spin", state 390, "(1)"
- line 260, ".input.spin", state 398, "(1)"
- line 414, ".input.spin", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, ".input.spin", state 499, "(1)"
- line 256, ".input.spin", state 511, "(1)"
- line 260, ".input.spin", state 519, "(1)"
- line 414, ".input.spin", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, ".input.spin", state 610, "(1)"
- line 256, ".input.spin", state 622, "(1)"
- line 260, ".input.spin", state 630, "(1)"
- line 414, ".input.spin", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, ".input.spin", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, ".input.spin", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, ".input.spin", state 723, "(1)"
- line 256, ".input.spin", state 735, "(1)"
- line 260, ".input.spin", state 743, "(1)"
- line 271, ".input.spin", state 796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, ".input.spin", state 805, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 820, "(1)"
- line 283, ".input.spin", state 827, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 843, "(1)"
- line 252, ".input.spin", state 851, "(1)"
- line 256, ".input.spin", state 863, "(1)"
- line 260, ".input.spin", state 871, "(1)"
- line 275, ".input.spin", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 909, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 918, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 934, "(1)"
- line 252, ".input.spin", state 942, "(1)"
- line 256, ".input.spin", state 954, "(1)"
- line 260, ".input.spin", state 962, "(1)"
- line 275, ".input.spin", state 987, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1000, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1009, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1025, "(1)"
- line 252, ".input.spin", state 1033, "(1)"
- line 256, ".input.spin", state 1045, "(1)"
- line 260, ".input.spin", state 1053, "(1)"
- line 275, ".input.spin", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, ".input.spin", state 1091, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, ".input.spin", state 1100, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, ".input.spin", state 1116, "(1)"
- line 252, ".input.spin", state 1124, "(1)"
- line 256, ".input.spin", state 1136, "(1)"
- line 260, ".input.spin", state 1144, "(1)"
- line 1236, ".input.spin", state 1159, "-end-"
- (71 of 1159 states)
-unreached in proctype :init:
- (0 of 78 states)
-
-pan: elapsed time 231 seconds
-pan: rate 16628.478 states/second
-pan: avg transition delay 2.4555e-06 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1294)
-Depth= 4900 States= 1e+06 Transitions= 2.37e+07 Memory= 550.334 t= 65.5 R= 2e+04
-Depth= 4973 States= 2e+06 Transitions= 4.8e+07 Memory= 634.221 t= 134 R= 1e+04
-Depth= 4973 States= 3e+06 Transitions= 7.25e+07 Memory= 718.205 t= 204 R= 1e+04
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 4973, errors: 0
- 3841511 states, stored
- 90254094 states, matched
- 94095605 transitions (= stored+matched)
-1.5073578e+09 atomic steps
-hash conflicts: 63765708 (resolved)
-
-Stats on memory usage (in Megabytes):
- 424.972 equivalent memory usage for states (stored*(State-vector + overhead))
- 330.368 actual memory usage for states (compression: 77.74%)
- state-vector as stored = 62 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 819.932 total actual memory usage
-
-unreached in proctype urcu_reader
- line 410, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 81, "(1)"
- line 256, "pan.___", state 101, "(1)"
- line 260, "pan.___", state 109, "(1)"
- line 596, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 410, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 199, "(1)"
- line 256, "pan.___", state 219, "(1)"
- line 260, "pan.___", state 227, "(1)"
- line 410, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 310, "(1)"
- line 256, "pan.___", state 330, "(1)"
- line 260, "pan.___", state 338, "(1)"
- line 410, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 361, "(1)"
- line 410, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 362, "else"
- line 410, "pan.___", state 365, "(1)"
- line 414, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 375, "(1)"
- line 414, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 376, "else"
- line 414, "pan.___", state 379, "(1)"
- line 414, "pan.___", state 380, "(1)"
- line 414, "pan.___", state 380, "(1)"
- line 412, "pan.___", state 385, "((i<1))"
- line 412, "pan.___", state 385, "((i>=1))"
- line 419, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 393, "(1)"
- line 419, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 394, "else"
- line 419, "pan.___", state 397, "(1)"
- line 419, "pan.___", state 398, "(1)"
- line 419, "pan.___", state 398, "(1)"
- line 423, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 407, "(1)"
- line 423, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 408, "else"
- line 423, "pan.___", state 411, "(1)"
- line 423, "pan.___", state 412, "(1)"
- line 423, "pan.___", state 412, "(1)"
- line 421, "pan.___", state 417, "((i<2))"
- line 421, "pan.___", state 417, "((i>=2))"
- line 248, "pan.___", state 423, "(1)"
- line 252, "pan.___", state 431, "(1)"
- line 252, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, "pan.___", state 432, "else"
- line 250, "pan.___", state 437, "((i<1))"
- line 250, "pan.___", state 437, "((i>=1))"
- line 256, "pan.___", state 443, "(1)"
- line 256, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, "pan.___", state 444, "else"
- line 260, "pan.___", state 451, "(1)"
- line 260, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, "pan.___", state 452, "else"
- line 258, "pan.___", state 457, "((i<2))"
- line 258, "pan.___", state 457, "((i>=2))"
- line 265, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, "pan.___", state 461, "else"
- line 430, "pan.___", state 463, "(1)"
- line 430, "pan.___", state 463, "(1)"
- line 596, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 596, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 596, "pan.___", state 468, "(1)"
- line 271, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 483, "(1)"
- line 279, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 519, "(1)"
- line 252, "pan.___", state 527, "(1)"
- line 256, "pan.___", state 539, "(1)"
- line 260, "pan.___", state 547, "(1)"
- line 410, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 629, "(1)"
- line 252, "pan.___", state 637, "(1)"
- line 256, "pan.___", state 649, "(1)"
- line 260, "pan.___", state 657, "(1)"
- line 410, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 747, "(1)"
- line 256, "pan.___", state 767, "(1)"
- line 260, "pan.___", state 775, "(1)"
- line 410, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 796, "(1)"
- line 410, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 797, "else"
- line 410, "pan.___", state 800, "(1)"
- line 414, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 810, "(1)"
- line 414, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 811, "else"
- line 414, "pan.___", state 814, "(1)"
- line 414, "pan.___", state 815, "(1)"
- line 414, "pan.___", state 815, "(1)"
- line 412, "pan.___", state 820, "((i<1))"
- line 412, "pan.___", state 820, "((i>=1))"
- line 419, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 828, "(1)"
- line 419, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 829, "else"
- line 419, "pan.___", state 832, "(1)"
- line 419, "pan.___", state 833, "(1)"
- line 419, "pan.___", state 833, "(1)"
- line 423, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 842, "(1)"
- line 423, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 843, "else"
- line 423, "pan.___", state 846, "(1)"
- line 423, "pan.___", state 847, "(1)"
- line 423, "pan.___", state 847, "(1)"
- line 421, "pan.___", state 852, "((i<2))"
- line 421, "pan.___", state 852, "((i>=2))"
- line 248, "pan.___", state 858, "(1)"
- line 252, "pan.___", state 866, "(1)"
- line 252, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, "pan.___", state 867, "else"
- line 250, "pan.___", state 872, "((i<1))"
- line 250, "pan.___", state 872, "((i>=1))"
- line 256, "pan.___", state 878, "(1)"
- line 256, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, "pan.___", state 879, "else"
- line 260, "pan.___", state 886, "(1)"
- line 260, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, "pan.___", state 887, "else"
- line 258, "pan.___", state 892, "((i<2))"
- line 258, "pan.___", state 892, "((i>=2))"
- line 265, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, "pan.___", state 896, "else"
- line 430, "pan.___", state 898, "(1)"
- line 430, "pan.___", state 898, "(1)"
- line 604, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 410, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 971, "(1)"
- line 252, "pan.___", state 979, "(1)"
- line 256, "pan.___", state 991, "(1)"
- line 260, "pan.___", state 999, "(1)"
- line 410, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1085, "(1)"
- line 256, "pan.___", state 1105, "(1)"
- line 260, "pan.___", state 1113, "(1)"
- line 410, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1200, "(1)"
- line 256, "pan.___", state 1220, "(1)"
- line 260, "pan.___", state 1228, "(1)"
- line 410, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1311, "(1)"
- line 256, "pan.___", state 1331, "(1)"
- line 260, "pan.___", state 1339, "(1)"
- line 271, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1407, "(1)"
- line 252, "pan.___", state 1415, "(1)"
- line 256, "pan.___", state 1427, "(1)"
- line 260, "pan.___", state 1435, "(1)"
- line 410, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1517, "(1)"
- line 252, "pan.___", state 1525, "(1)"
- line 256, "pan.___", state 1537, "(1)"
- line 260, "pan.___", state 1545, "(1)"
- line 410, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1628, "(1)"
- line 252, "pan.___", state 1636, "(1)"
- line 256, "pan.___", state 1648, "(1)"
- line 260, "pan.___", state 1656, "(1)"
- line 410, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1742, "(1)"
- line 256, "pan.___", state 1762, "(1)"
- line 260, "pan.___", state 1770, "(1)"
- line 643, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 410, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1860, "(1)"
- line 256, "pan.___", state 1880, "(1)"
- line 260, "pan.___", state 1888, "(1)"
- line 410, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1971, "(1)"
- line 256, "pan.___", state 1991, "(1)"
- line 260, "pan.___", state 1999, "(1)"
- line 410, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 2022, "(1)"
- line 410, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 410, "pan.___", state 2023, "else"
- line 410, "pan.___", state 2026, "(1)"
- line 414, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2036, "(1)"
- line 414, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 414, "pan.___", state 2037, "else"
- line 414, "pan.___", state 2040, "(1)"
- line 414, "pan.___", state 2041, "(1)"
- line 414, "pan.___", state 2041, "(1)"
- line 412, "pan.___", state 2046, "((i<1))"
- line 412, "pan.___", state 2046, "((i>=1))"
- line 419, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2054, "(1)"
- line 419, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 419, "pan.___", state 2055, "else"
- line 419, "pan.___", state 2058, "(1)"
- line 419, "pan.___", state 2059, "(1)"
- line 419, "pan.___", state 2059, "(1)"
- line 423, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2068, "(1)"
- line 423, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 423, "pan.___", state 2069, "else"
- line 423, "pan.___", state 2072, "(1)"
- line 423, "pan.___", state 2073, "(1)"
- line 423, "pan.___", state 2073, "(1)"
- line 421, "pan.___", state 2078, "((i<2))"
- line 421, "pan.___", state 2078, "((i>=2))"
- line 248, "pan.___", state 2084, "(1)"
- line 252, "pan.___", state 2092, "(1)"
- line 252, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 252, "pan.___", state 2093, "else"
- line 250, "pan.___", state 2098, "((i<1))"
- line 250, "pan.___", state 2098, "((i>=1))"
- line 256, "pan.___", state 2104, "(1)"
- line 256, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 256, "pan.___", state 2105, "else"
- line 260, "pan.___", state 2112, "(1)"
- line 260, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 260, "pan.___", state 2113, "else"
- line 258, "pan.___", state 2118, "((i<2))"
- line 258, "pan.___", state 2118, "((i>=2))"
- line 265, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 265, "pan.___", state 2122, "else"
- line 430, "pan.___", state 2124, "(1)"
- line 430, "pan.___", state 2124, "(1)"
- line 643, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 643, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 643, "pan.___", state 2129, "(1)"
- line 271, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2180, "(1)"
- line 252, "pan.___", state 2188, "(1)"
- line 256, "pan.___", state 2200, "(1)"
- line 260, "pan.___", state 2208, "(1)"
- line 410, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2290, "(1)"
- line 252, "pan.___", state 2298, "(1)"
- line 256, "pan.___", state 2310, "(1)"
- line 260, "pan.___", state 2318, "(1)"
- line 271, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2387, "(1)"
- line 252, "pan.___", state 2395, "(1)"
- line 256, "pan.___", state 2407, "(1)"
- line 260, "pan.___", state 2415, "(1)"
- line 410, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2497, "(1)"
- line 252, "pan.___", state 2505, "(1)"
- line 256, "pan.___", state 2517, "(1)"
- line 260, "pan.___", state 2525, "(1)"
- line 410, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 2608, "(1)"
- line 252, "pan.___", state 2616, "(1)"
- line 256, "pan.___", state 2628, "(1)"
- line 260, "pan.___", state 2636, "(1)"
- line 248, "pan.___", state 2667, "(1)"
- line 256, "pan.___", state 2687, "(1)"
- line 260, "pan.___", state 2695, "(1)"
- line 248, "pan.___", state 2710, "(1)"
- line 252, "pan.___", state 2718, "(1)"
- line 256, "pan.___", state 2730, "(1)"
- line 260, "pan.___", state 2738, "(1)"
- line 897, "pan.___", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 410, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 82, "(1)"
- line 252, "pan.___", state 90, "(1)"
- line 256, "pan.___", state 102, "(1)"
- line 271, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 257, "(1)"
- line 252, "pan.___", state 265, "(1)"
- line 256, "pan.___", state 277, "(1)"
- line 260, "pan.___", state 285, "(1)"
- line 414, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 378, "(1)"
- line 256, "pan.___", state 390, "(1)"
- line 260, "pan.___", state 398, "(1)"
- line 414, "pan.___", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 499, "(1)"
- line 256, "pan.___", state 511, "(1)"
- line 260, "pan.___", state 519, "(1)"
- line 414, "pan.___", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 610, "(1)"
- line 256, "pan.___", state 622, "(1)"
- line 260, "pan.___", state 630, "(1)"
- line 414, "pan.___", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 419, "pan.___", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 423, "pan.___", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 252, "pan.___", state 723, "(1)"
- line 256, "pan.___", state 735, "(1)"
- line 260, "pan.___", state 743, "(1)"
- line 271, "pan.___", state 796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 805, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 820, "(1)"
- line 283, "pan.___", state 827, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 843, "(1)"
- line 252, "pan.___", state 851, "(1)"
- line 256, "pan.___", state 863, "(1)"
- line 260, "pan.___", state 871, "(1)"
- line 275, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 909, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 918, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 934, "(1)"
- line 252, "pan.___", state 942, "(1)"
- line 256, "pan.___", state 954, "(1)"
- line 260, "pan.___", state 962, "(1)"
- line 275, "pan.___", state 987, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1000, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1009, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1025, "(1)"
- line 252, "pan.___", state 1033, "(1)"
- line 256, "pan.___", state 1045, "(1)"
- line 260, "pan.___", state 1053, "(1)"
- line 275, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 279, "pan.___", state 1091, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1100, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 248, "pan.___", state 1116, "(1)"
- line 252, "pan.___", state 1124, "(1)"
- line 256, "pan.___", state 1136, "(1)"
- line 260, "pan.___", state 1144, "(1)"
- line 1236, "pan.___", state 1159, "-end-"
- (71 of 1159 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1299, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 265 seconds
-pan: rate 14518.182 states/second
-pan: avg transition delay 2.812e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 8086 States= 1e+06 Transitions= 1.91e+07 Memory= 550.334 t= 51.2 R= 2e+04
-Depth= 8086 States= 2e+06 Transitions= 3.68e+07 Memory= 634.318 t= 98.4 R= 2e+04
-Depth= 8086 States= 3e+06 Transitions= 5.68e+07 Memory= 718.205 t= 153 R= 2e+04
-pan: resizing hashtable to -w22.. done
-Depth= 8086 States= 4e+06 Transitions= 7.01e+07 Memory= 833.213 t= 188 R= 2e+04
-Depth= 8086 States= 5e+06 Transitions= 8.42e+07 Memory= 917.197 t= 225 R= 2e+04
-Depth= 8086 States= 6e+06 Transitions= 9.87e+07 Memory= 1001.182 t= 263 R= 2e+04
-Depth= 8086 States= 7e+06 Transitions= 1.12e+08 Memory= 1085.166 t= 298 R= 2e+04
-Depth= 8086 States= 8e+06 Transitions= 1.28e+08 Memory= 1169.053 t= 342 R= 2e+04
-Depth= 8086 States= 9e+06 Transitions= 1.62e+08 Memory= 1253.037 t= 436 R= 2e+04
-pan: resizing hashtable to -w24.. done
-Depth= 8086 States= 1e+07 Transitions= 1.95e+08 Memory= 1461.018 t= 530 R= 2e+04
-Depth= 13700 States= 1.1e+07 Transitions= 2.31e+08 Memory= 1545.002 t= 629 R= 2e+04
-Depth= 13700 States= 1.2e+07 Transitions= 2.64e+08 Memory= 1628.986 t= 721 R= 2e+04
-Depth= 13700 States= 1.3e+07 Transitions= 2.89e+08 Memory= 1712.971 t= 789 R= 2e+04
-Depth= 13700 States= 1.4e+07 Transitions= 3.09e+08 Memory= 1796.955 t= 844 R= 2e+04
-Depth= 13700 States= 1.5e+07 Transitions= 3.29e+08 Memory= 1880.940 t= 897 R= 2e+04
-pan: claim violated! (at depth 1143)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 13700, errors: 1
- 15925114 states, stored
-3.2589318e+08 states, matched
-3.418183e+08 transitions (= stored+matched)
-5.3108495e+09 atomic steps
-hash conflicts: 1.8673119e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1761.735 equivalent memory usage for states (stored*(State-vector + overhead))
- 1373.571 actual memory usage for states (compression: 77.97%)
- state-vector as stored = 62 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1958.576 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 21, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 53, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 67, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 85, "(1)"
- line 257, "pan.___", state 105, "(1)"
- line 261, "pan.___", state 113, "(1)"
- line 603, "pan.___", state 132, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 139, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 171, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 185, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 203, "(1)"
- line 257, "pan.___", state 223, "(1)"
- line 261, "pan.___", state 231, "(1)"
- line 411, "pan.___", state 250, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 282, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 296, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 314, "(1)"
- line 257, "pan.___", state 334, "(1)"
- line 261, "pan.___", state 342, "(1)"
- line 411, "pan.___", state 363, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 365, "(1)"
- line 411, "pan.___", state 366, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 366, "else"
- line 411, "pan.___", state 369, "(1)"
- line 415, "pan.___", state 377, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 379, "(1)"
- line 415, "pan.___", state 380, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 380, "else"
- line 415, "pan.___", state 383, "(1)"
- line 415, "pan.___", state 384, "(1)"
- line 415, "pan.___", state 384, "(1)"
- line 413, "pan.___", state 389, "((i<1))"
- line 413, "pan.___", state 389, "((i>=1))"
- line 420, "pan.___", state 395, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 397, "(1)"
- line 420, "pan.___", state 398, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 398, "else"
- line 420, "pan.___", state 401, "(1)"
- line 420, "pan.___", state 402, "(1)"
- line 420, "pan.___", state 402, "(1)"
- line 424, "pan.___", state 409, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 411, "(1)"
- line 424, "pan.___", state 412, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 412, "else"
- line 424, "pan.___", state 415, "(1)"
- line 424, "pan.___", state 416, "(1)"
- line 424, "pan.___", state 416, "(1)"
- line 422, "pan.___", state 421, "((i<2))"
- line 422, "pan.___", state 421, "((i>=2))"
- line 249, "pan.___", state 427, "(1)"
- line 253, "pan.___", state 435, "(1)"
- line 253, "pan.___", state 436, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 436, "else"
- line 251, "pan.___", state 441, "((i<1))"
- line 251, "pan.___", state 441, "((i>=1))"
- line 257, "pan.___", state 447, "(1)"
- line 257, "pan.___", state 448, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 448, "else"
- line 261, "pan.___", state 455, "(1)"
- line 261, "pan.___", state 456, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 456, "else"
- line 259, "pan.___", state 461, "((i<2))"
- line 259, "pan.___", state 461, "((i>=2))"
- line 266, "pan.___", state 465, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 465, "else"
- line 431, "pan.___", state 467, "(1)"
- line 431, "pan.___", state 467, "(1)"
- line 603, "pan.___", state 470, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 603, "pan.___", state 471, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 603, "pan.___", state 472, "(1)"
- line 272, "pan.___", state 476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 478, "(1)"
- line 276, "pan.___", state 485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 487, "(1)"
- line 276, "pan.___", state 488, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 488, "else"
- line 274, "pan.___", state 493, "((i<1))"
- line 274, "pan.___", state 493, "((i>=1))"
- line 280, "pan.___", state 498, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 500, "(1)"
- line 280, "pan.___", state 501, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 501, "else"
- line 284, "pan.___", state 507, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 509, "(1)"
- line 284, "pan.___", state 510, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 510, "else"
- line 282, "pan.___", state 515, "((i<2))"
- line 282, "pan.___", state 515, "((i>=2))"
- line 249, "pan.___", state 523, "(1)"
- line 253, "pan.___", state 531, "(1)"
- line 253, "pan.___", state 532, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 532, "else"
- line 251, "pan.___", state 537, "((i<1))"
- line 251, "pan.___", state 537, "((i>=1))"
- line 257, "pan.___", state 543, "(1)"
- line 257, "pan.___", state 544, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 544, "else"
- line 261, "pan.___", state 551, "(1)"
- line 261, "pan.___", state 552, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 552, "else"
- line 266, "pan.___", state 561, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 561, "else"
- line 299, "pan.___", state 563, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 563, "else"
- line 411, "pan.___", state 569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 601, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 615, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 633, "(1)"
- line 257, "pan.___", state 653, "(1)"
- line 261, "pan.___", state 661, "(1)"
- line 411, "pan.___", state 687, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 719, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 733, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 751, "(1)"
- line 257, "pan.___", state 771, "(1)"
- line 261, "pan.___", state 779, "(1)"
- line 411, "pan.___", state 798, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 800, "(1)"
- line 411, "pan.___", state 801, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 801, "else"
- line 411, "pan.___", state 804, "(1)"
- line 415, "pan.___", state 812, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 814, "(1)"
- line 415, "pan.___", state 815, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 815, "else"
- line 415, "pan.___", state 818, "(1)"
- line 415, "pan.___", state 819, "(1)"
- line 415, "pan.___", state 819, "(1)"
- line 413, "pan.___", state 824, "((i<1))"
- line 413, "pan.___", state 824, "((i>=1))"
- line 420, "pan.___", state 830, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 832, "(1)"
- line 420, "pan.___", state 833, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 833, "else"
- line 420, "pan.___", state 836, "(1)"
- line 420, "pan.___", state 837, "(1)"
- line 420, "pan.___", state 837, "(1)"
- line 424, "pan.___", state 844, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 846, "(1)"
- line 424, "pan.___", state 847, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 847, "else"
- line 424, "pan.___", state 850, "(1)"
- line 424, "pan.___", state 851, "(1)"
- line 424, "pan.___", state 851, "(1)"
- line 422, "pan.___", state 856, "((i<2))"
- line 422, "pan.___", state 856, "((i>=2))"
- line 249, "pan.___", state 862, "(1)"
- line 253, "pan.___", state 870, "(1)"
- line 253, "pan.___", state 871, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 871, "else"
- line 251, "pan.___", state 876, "((i<1))"
- line 251, "pan.___", state 876, "((i>=1))"
- line 257, "pan.___", state 882, "(1)"
- line 257, "pan.___", state 883, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 883, "else"
- line 261, "pan.___", state 890, "(1)"
- line 261, "pan.___", state 891, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 891, "else"
- line 259, "pan.___", state 896, "((i<2))"
- line 259, "pan.___", state 896, "((i>=2))"
- line 266, "pan.___", state 900, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 900, "else"
- line 431, "pan.___", state 902, "(1)"
- line 431, "pan.___", state 902, "(1)"
- line 611, "pan.___", state 906, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 911, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 943, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 957, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 975, "(1)"
- line 257, "pan.___", state 995, "(1)"
- line 261, "pan.___", state 1003, "(1)"
- line 411, "pan.___", state 1025, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1057, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1071, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1089, "(1)"
- line 257, "pan.___", state 1109, "(1)"
- line 261, "pan.___", state 1117, "(1)"
- line 411, "pan.___", state 1140, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1172, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1186, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1204, "(1)"
- line 257, "pan.___", state 1224, "(1)"
- line 261, "pan.___", state 1232, "(1)"
- line 411, "pan.___", state 1251, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1283, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1297, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1315, "(1)"
- line 257, "pan.___", state 1335, "(1)"
- line 261, "pan.___", state 1343, "(1)"
- line 272, "pan.___", state 1364, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1366, "(1)"
- line 276, "pan.___", state 1373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1375, "(1)"
- line 276, "pan.___", state 1376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1376, "else"
- line 274, "pan.___", state 1381, "((i<1))"
- line 274, "pan.___", state 1381, "((i>=1))"
- line 280, "pan.___", state 1386, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1388, "(1)"
- line 280, "pan.___", state 1389, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1389, "else"
- line 284, "pan.___", state 1395, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1397, "(1)"
- line 284, "pan.___", state 1398, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1398, "else"
- line 282, "pan.___", state 1403, "((i<2))"
- line 282, "pan.___", state 1403, "((i>=2))"
- line 249, "pan.___", state 1411, "(1)"
- line 253, "pan.___", state 1419, "(1)"
- line 253, "pan.___", state 1420, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1420, "else"
- line 251, "pan.___", state 1425, "((i<1))"
- line 251, "pan.___", state 1425, "((i>=1))"
- line 257, "pan.___", state 1431, "(1)"
- line 257, "pan.___", state 1432, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1432, "else"
- line 261, "pan.___", state 1439, "(1)"
- line 261, "pan.___", state 1440, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1440, "else"
- line 266, "pan.___", state 1449, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1449, "else"
- line 299, "pan.___", state 1451, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1451, "else"
- line 411, "pan.___", state 1457, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1489, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1521, "(1)"
- line 257, "pan.___", state 1541, "(1)"
- line 261, "pan.___", state 1549, "(1)"
- line 411, "pan.___", state 1568, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1600, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1614, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1632, "(1)"
- line 257, "pan.___", state 1652, "(1)"
- line 261, "pan.___", state 1660, "(1)"
- line 411, "pan.___", state 1682, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1714, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1728, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1746, "(1)"
- line 257, "pan.___", state 1766, "(1)"
- line 261, "pan.___", state 1774, "(1)"
- line 650, "pan.___", state 1793, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1800, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1832, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1846, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1864, "(1)"
- line 257, "pan.___", state 1884, "(1)"
- line 261, "pan.___", state 1892, "(1)"
- line 411, "pan.___", state 1911, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1943, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1957, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1975, "(1)"
- line 257, "pan.___", state 1995, "(1)"
- line 261, "pan.___", state 2003, "(1)"
- line 411, "pan.___", state 2024, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2026, "(1)"
- line 411, "pan.___", state 2027, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2027, "else"
- line 411, "pan.___", state 2030, "(1)"
- line 415, "pan.___", state 2038, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2040, "(1)"
- line 415, "pan.___", state 2041, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2041, "else"
- line 415, "pan.___", state 2044, "(1)"
- line 415, "pan.___", state 2045, "(1)"
- line 415, "pan.___", state 2045, "(1)"
- line 413, "pan.___", state 2050, "((i<1))"
- line 413, "pan.___", state 2050, "((i>=1))"
- line 420, "pan.___", state 2056, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2058, "(1)"
- line 420, "pan.___", state 2059, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2059, "else"
- line 420, "pan.___", state 2062, "(1)"
- line 420, "pan.___", state 2063, "(1)"
- line 420, "pan.___", state 2063, "(1)"
- line 424, "pan.___", state 2070, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2072, "(1)"
- line 424, "pan.___", state 2073, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2073, "else"
- line 424, "pan.___", state 2076, "(1)"
- line 424, "pan.___", state 2077, "(1)"
- line 424, "pan.___", state 2077, "(1)"
- line 422, "pan.___", state 2082, "((i<2))"
- line 422, "pan.___", state 2082, "((i>=2))"
- line 249, "pan.___", state 2088, "(1)"
- line 253, "pan.___", state 2096, "(1)"
- line 253, "pan.___", state 2097, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2097, "else"
- line 251, "pan.___", state 2102, "((i<1))"
- line 251, "pan.___", state 2102, "((i>=1))"
- line 257, "pan.___", state 2108, "(1)"
- line 257, "pan.___", state 2109, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2109, "else"
- line 261, "pan.___", state 2116, "(1)"
- line 261, "pan.___", state 2117, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2117, "else"
- line 259, "pan.___", state 2122, "((i<2))"
- line 259, "pan.___", state 2122, "((i>=2))"
- line 266, "pan.___", state 2126, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2126, "else"
- line 431, "pan.___", state 2128, "(1)"
- line 431, "pan.___", state 2128, "(1)"
- line 650, "pan.___", state 2131, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 650, "pan.___", state 2132, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 650, "pan.___", state 2133, "(1)"
- line 272, "pan.___", state 2137, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 2139, "(1)"
- line 276, "pan.___", state 2146, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2148, "(1)"
- line 276, "pan.___", state 2149, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 2149, "else"
- line 274, "pan.___", state 2154, "((i<1))"
- line 274, "pan.___", state 2154, "((i>=1))"
- line 280, "pan.___", state 2159, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2161, "(1)"
- line 280, "pan.___", state 2162, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 2162, "else"
- line 284, "pan.___", state 2168, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2170, "(1)"
- line 284, "pan.___", state 2171, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 2171, "else"
- line 282, "pan.___", state 2176, "((i<2))"
- line 282, "pan.___", state 2176, "((i>=2))"
- line 249, "pan.___", state 2184, "(1)"
- line 253, "pan.___", state 2192, "(1)"
- line 253, "pan.___", state 2193, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2193, "else"
- line 251, "pan.___", state 2198, "((i<1))"
- line 251, "pan.___", state 2198, "((i>=1))"
- line 257, "pan.___", state 2204, "(1)"
- line 257, "pan.___", state 2205, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2205, "else"
- line 261, "pan.___", state 2212, "(1)"
- line 261, "pan.___", state 2213, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2213, "else"
- line 266, "pan.___", state 2222, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2222, "else"
- line 299, "pan.___", state 2224, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 2224, "else"
- line 411, "pan.___", state 2230, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2262, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2276, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2294, "(1)"
- line 257, "pan.___", state 2314, "(1)"
- line 261, "pan.___", state 2322, "(1)"
- line 272, "pan.___", state 2344, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 2346, "(1)"
- line 276, "pan.___", state 2353, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2355, "(1)"
- line 276, "pan.___", state 2356, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 2356, "else"
- line 274, "pan.___", state 2361, "((i<1))"
- line 274, "pan.___", state 2361, "((i>=1))"
- line 280, "pan.___", state 2366, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2368, "(1)"
- line 280, "pan.___", state 2369, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 2369, "else"
- line 284, "pan.___", state 2375, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2377, "(1)"
- line 284, "pan.___", state 2378, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 2378, "else"
- line 282, "pan.___", state 2383, "((i<2))"
- line 282, "pan.___", state 2383, "((i>=2))"
- line 249, "pan.___", state 2391, "(1)"
- line 253, "pan.___", state 2399, "(1)"
- line 253, "pan.___", state 2400, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2400, "else"
- line 251, "pan.___", state 2405, "((i<1))"
- line 251, "pan.___", state 2405, "((i>=1))"
- line 257, "pan.___", state 2411, "(1)"
- line 257, "pan.___", state 2412, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2412, "else"
- line 261, "pan.___", state 2419, "(1)"
- line 261, "pan.___", state 2420, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2420, "else"
- line 266, "pan.___", state 2429, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2429, "else"
- line 299, "pan.___", state 2431, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 2431, "else"
- line 411, "pan.___", state 2437, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2469, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2483, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2501, "(1)"
- line 257, "pan.___", state 2521, "(1)"
- line 261, "pan.___", state 2529, "(1)"
- line 411, "pan.___", state 2548, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2580, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2594, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2612, "(1)"
- line 257, "pan.___", state 2632, "(1)"
- line 261, "pan.___", state 2640, "(1)"
- line 249, "pan.___", state 2671, "(1)"
- line 257, "pan.___", state 2691, "(1)"
- line 261, "pan.___", state 2699, "(1)"
- line 249, "pan.___", state 2714, "(1)"
- line 257, "pan.___", state 2734, "(1)"
- line 261, "pan.___", state 2742, "(1)"
- line 898, "pan.___", state 2759, "-end-"
- (306 of 2759 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 20, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 26, "(1)"
- line 415, "pan.___", state 34, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 40, "(1)"
- line 415, "pan.___", state 41, "(1)"
- line 415, "pan.___", state 41, "(1)"
- line 413, "pan.___", state 46, "((i<1))"
- line 413, "pan.___", state 46, "((i>=1))"
- line 420, "pan.___", state 52, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 58, "(1)"
- line 420, "pan.___", state 59, "(1)"
- line 420, "pan.___", state 59, "(1)"
- line 424, "pan.___", state 72, "(1)"
- line 424, "pan.___", state 73, "(1)"
- line 424, "pan.___", state 73, "(1)"
- line 422, "pan.___", state 78, "((i<2))"
- line 422, "pan.___", state 78, "((i>=2))"
- line 249, "pan.___", state 84, "(1)"
- line 253, "pan.___", state 92, "(1)"
- line 253, "pan.___", state 93, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 93, "else"
- line 251, "pan.___", state 98, "((i<1))"
- line 251, "pan.___", state 98, "((i>=1))"
- line 257, "pan.___", state 104, "(1)"
- line 257, "pan.___", state 105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 105, "else"
- line 261, "pan.___", state 112, "(1)"
- line 261, "pan.___", state 113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 113, "else"
- line 259, "pan.___", state 118, "((i<2))"
- line 259, "pan.___", state 118, "((i>=2))"
- line 266, "pan.___", state 122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 122, "else"
- line 431, "pan.___", state 124, "(1)"
- line 431, "pan.___", state 124, "(1)"
- line 272, "pan.___", state 133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 142, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 274, "pan.___", state 150, "((i<1))"
- line 274, "pan.___", state 150, "((i>=1))"
- line 280, "pan.___", state 155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 1021, "pan.___", state 183, "old_data = cached_rcu_ptr.val[_pid]"
- line 1032, "pan.___", state 187, "_proc_urcu_writer = (_proc_urcu_writer|(1<<4))"
- line 411, "pan.___", state 195, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 201, "(1)"
- line 415, "pan.___", state 209, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 215, "(1)"
- line 415, "pan.___", state 216, "(1)"
- line 415, "pan.___", state 216, "(1)"
- line 420, "pan.___", state 229, "(1)"
- line 424, "pan.___", state 241, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 259, "(1)"
- line 253, "pan.___", state 267, "(1)"
- line 261, "pan.___", state 287, "(1)"
- line 431, "pan.___", state 299, "(1)"
- line 431, "pan.___", state 299, "(1)"
- line 415, "pan.___", state 322, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 354, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 380, "(1)"
- line 261, "pan.___", state 400, "(1)"
- line 415, "pan.___", state 443, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 501, "(1)"
- line 415, "pan.___", state 554, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 612, "(1)"
- line 415, "pan.___", state 667, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 699, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 725, "(1)"
- line 261, "pan.___", state 745, "(1)"
- line 1168, "pan.___", state 770, "_proc_urcu_writer = (_proc_urcu_writer|(1<<13))"
- line 272, "pan.___", state 798, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 800, "(1)"
- line 276, "pan.___", state 807, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 809, "(1)"
- line 276, "pan.___", state 810, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 810, "else"
- line 274, "pan.___", state 815, "((i<1))"
- line 274, "pan.___", state 815, "((i>=1))"
- line 280, "pan.___", state 820, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 822, "(1)"
- line 280, "pan.___", state 823, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 823, "else"
- line 284, "pan.___", state 829, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 831, "(1)"
- line 284, "pan.___", state 832, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 832, "else"
- line 282, "pan.___", state 837, "((i<2))"
- line 282, "pan.___", state 837, "((i>=2))"
- line 249, "pan.___", state 845, "(1)"
- line 253, "pan.___", state 853, "(1)"
- line 253, "pan.___", state 854, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 854, "else"
- line 251, "pan.___", state 859, "((i<1))"
- line 251, "pan.___", state 859, "((i>=1))"
- line 257, "pan.___", state 865, "(1)"
- line 257, "pan.___", state 866, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 866, "else"
- line 261, "pan.___", state 873, "(1)"
- line 261, "pan.___", state 874, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 874, "else"
- line 266, "pan.___", state 883, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 883, "else"
- line 299, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 885, "else"
- line 276, "pan.___", state 898, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 911, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 920, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 936, "(1)"
- line 253, "pan.___", state 944, "(1)"
- line 257, "pan.___", state 956, "(1)"
- line 261, "pan.___", state 964, "(1)"
- line 276, "pan.___", state 989, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1011, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1027, "(1)"
- line 253, "pan.___", state 1035, "(1)"
- line 257, "pan.___", state 1047, "(1)"
- line 261, "pan.___", state 1055, "(1)"
- line 272, "pan.___", state 1071, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 1073, "(1)"
- line 276, "pan.___", state 1080, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 1082, "(1)"
- line 276, "pan.___", state 1083, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 1083, "else"
- line 274, "pan.___", state 1088, "((i<1))"
- line 274, "pan.___", state 1088, "((i>=1))"
- line 280, "pan.___", state 1093, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1095, "(1)"
- line 280, "pan.___", state 1096, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1096, "else"
- line 284, "pan.___", state 1102, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1104, "(1)"
- line 284, "pan.___", state 1105, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1105, "else"
- line 282, "pan.___", state 1110, "((i<2))"
- line 282, "pan.___", state 1110, "((i>=2))"
- line 249, "pan.___", state 1118, "(1)"
- line 253, "pan.___", state 1126, "(1)"
- line 253, "pan.___", state 1127, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1127, "else"
- line 251, "pan.___", state 1132, "((i<1))"
- line 251, "pan.___", state 1132, "((i>=1))"
- line 257, "pan.___", state 1138, "(1)"
- line 257, "pan.___", state 1139, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1139, "else"
- line 261, "pan.___", state 1146, "(1)"
- line 261, "pan.___", state 1147, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1147, "else"
- line 266, "pan.___", state 1156, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1156, "else"
- line 299, "pan.___", state 1158, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1158, "else"
- line 1237, "pan.___", state 1161, "-end-"
- (113 of 1161 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 933 seconds
-pan: rate 17076.039 states/second
-pan: avg transition delay 2.7284e-06 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define NO_MB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4000
-2:3:3920
-3:3:3923
-4:3:3923
-5:3:3926
-6:3:3934
-7:3:3934
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-10:3:3947
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-12:3:3950
-13:3:3960
-14:3:3968
-15:3:3968
-16:3:3971
-17:3:3977
-18:3:3981
-19:3:3981
-20:3:3984
-21:3:3990
-22:3:3994
-23:3:3995
-24:0:4000
-25:3:3997
-26:0:4000
-27:2:2761
-28:0:4000
-29:2:2767
-30:0:4000
-31:2:2768
-32:0:4000
-33:2:2770
-34:0:4000
-35:2:2771
-36:0:4000
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-38:0:4000
-39:2:2773
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-41:2:2774
-42:2:2775
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-44:2:2780
-45:2:2788
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-48:2:2794
-49:2:2802
-50:2:2807
-51:2:2811
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-53:2:2820
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-882:1:134
-883:1:135
-884:1:139
-885:1:140
-886:1:148
-887:1:149
-888:1:153
-889:1:154
-890:1:162
-891:1:167
-892:1:171
-893:1:172
-894:1:180
-895:1:181
-896:1:185
-897:1:186
-898:1:180
-899:1:181
-900:1:185
-901:1:186
-902:1:194
-903:1:199
-904:1:206
-905:1:207
-906:1:214
-907:1:219
-908:1:226
-909:1:227
-910:1:226
-911:1:227
-912:1:234
-913:0:4000
-914:2:3548
-915:0:4000
-916:1:15
-917:0:4000
-918:2:3549
-919:0:4000
-920:1:245
-921:1:246
-922:1:250
-923:1:251
-924:1:259
-925:1:260
-926:1:264
-927:1:265
-928:1:273
-929:1:278
-930:1:282
-931:1:283
-932:1:291
-933:1:292
-934:1:296
-935:1:297
-936:1:291
-937:1:292
-938:1:296
-939:1:297
-940:1:305
-941:1:310
-942:1:317
-943:1:318
-944:1:325
-945:1:330
-946:1:337
-947:1:338
-948:1:337
-949:1:338
-950:1:345
-951:1:354
-952:0:4000
-953:2:3548
-954:0:4000
-955:1:15
-956:0:4000
-957:2:3549
-958:0:4000
-959:1:564
-960:1:565
-961:1:569
-962:1:570
-963:1:578
-964:1:579
-965:1:580
-966:1:592
-967:1:597
-968:1:601
-969:1:602
-970:1:610
-971:1:611
-972:1:615
-973:1:616
-974:1:610
-975:1:611
-976:1:615
-977:1:616
-978:1:624
-979:1:629
-980:1:636
-981:1:637
-982:1:644
-983:1:649
-984:1:656
-985:1:657
-986:1:656
-987:1:657
-988:1:664
-989:0:4000
-990:2:3548
-991:0:4000
-992:1:15
-993:0:4000
-994:2:3549
-995:0:4000
-996:1:675
-997:1:678
-998:1:679
-999:0:4000
-1000:2:3548
-1001:0:4000
-1002:1:15
-1003:0:4000
-1004:2:3549
-1005:0:4000
-1006:1:682
-1007:1:683
-1008:1:687
-1009:1:688
-1010:1:696
-1011:1:697
-1012:1:701
-1013:1:702
-1014:1:710
-1015:1:715
-1016:1:719
-1017:1:720
-1018:1:728
-1019:1:729
-1020:1:733
-1021:1:734
-1022:1:728
-1023:1:729
-1024:1:733
-1025:1:734
-1026:1:742
-1027:1:747
-1028:1:754
-1029:1:755
-1030:1:762
-1031:1:767
-1032:1:774
-1033:1:775
-1034:1:774
-1035:1:775
-1036:1:782
-1037:0:4000
-1038:2:3548
-1039:0:4000
-1040:1:15
-1041:0:4000
-1042:2:3549
-1043:0:4000
-1044:1:906
-1045:1:907
-1046:1:911
-1047:1:912
-1048:1:920
-1049:1:921
-1050:1:925
-1051:1:926
-1052:1:934
-1053:1:939
-1054:1:943
-1055:1:944
-1056:1:952
-1057:1:953
-1058:1:957
-1059:1:958
-1060:1:952
-1061:1:953
-1062:1:957
-1063:1:958
-1064:1:966
-1065:1:971
-1066:1:978
-1067:1:979
-1068:1:986
-1069:1:991
-1070:1:998
-1071:1:999
-1072:1:998
-1073:1:999
-1074:1:1006
-1075:1:1015
-1076:1:1019
-1077:0:4000
-1078:2:3548
-1079:0:4000
-1080:1:15
-1081:0:4000
-1082:2:3549
-1083:0:4000
-1084:1:1020
-1085:1:1021
-1086:1:1025
-1087:1:1026
-1088:1:1034
-1089:1:1035
-1090:1:1036
-1091:1:1048
-1092:1:1053
-1093:1:1057
-1094:1:1058
-1095:1:1066
-1096:1:1067
-1097:1:1071
-1098:1:1072
-1099:1:1066
-1100:1:1067
-1101:1:1071
-1102:1:1072
-1103:1:1080
-1104:1:1085
-1105:1:1092
-1106:1:1093
-1107:1:1100
-1108:1:1105
-1109:1:1112
-1110:1:1113
-1111:1:1112
-1112:1:1113
-1113:1:1120
-1114:0:4000
-1115:2:3548
-1116:0:4000
-1117:1:15
-1118:0:4000
-1119:2:3549
-1120:0:4000
-1121:1:1131
-1122:0:4000
-1123:2:3548
-1124:0:4000
-1125:1:2667
-1126:1:2674
-1127:1:2675
-1128:1:2682
-1129:1:2687
-1130:1:2694
-1131:1:2695
-1132:1:2694
-1133:1:2695
-1134:1:2702
-1135:1:2706
-1136:0:4000
-1137:2:3549
-1138:0:4000
-1139:1:1133
-1140:1:1134
-1141:0:3998
-1142:2:3548
-1143:0:4004
-1144:0:4000
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 4907 States= 1e+06 Transitions= 2.54e+07 Memory= 550.432 t= 71.2 R= 1e+04
-Depth= 5133 States= 2e+06 Transitions= 5.13e+07 Memory= 634.318 t= 145 R= 1e+04
-Depth= 5133 States= 3e+06 Transitions= 7.76e+07 Memory= 718.303 t= 220 R= 1e+04
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5133, errors: 0
- 3846927 states, stored
- 96650452 states, matched
-1.0049738e+08 transitions (= stored+matched)
-1.6169296e+09 atomic steps
-hash conflicts: 68306904 (resolved)
-
-Stats on memory usage (in Megabytes):
- 425.571 equivalent memory usage for states (stored*(State-vector + overhead))
- 330.939 actual memory usage for states (compression: 77.76%)
- state-vector as stored = 62 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 820.420 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 81, "(1)"
- line 257, "pan.___", state 101, "(1)"
- line 261, "pan.___", state 109, "(1)"
- line 597, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 199, "(1)"
- line 257, "pan.___", state 219, "(1)"
- line 261, "pan.___", state 227, "(1)"
- line 411, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 310, "(1)"
- line 257, "pan.___", state 330, "(1)"
- line 261, "pan.___", state 338, "(1)"
- line 411, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 361, "(1)"
- line 411, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 362, "else"
- line 411, "pan.___", state 365, "(1)"
- line 415, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 375, "(1)"
- line 415, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 376, "else"
- line 415, "pan.___", state 379, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 413, "pan.___", state 385, "((i<1))"
- line 413, "pan.___", state 385, "((i>=1))"
- line 420, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 393, "(1)"
- line 420, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 394, "else"
- line 420, "pan.___", state 397, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 424, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 407, "(1)"
- line 424, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 408, "else"
- line 424, "pan.___", state 411, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 422, "pan.___", state 417, "((i<2))"
- line 422, "pan.___", state 417, "((i>=2))"
- line 249, "pan.___", state 423, "(1)"
- line 253, "pan.___", state 431, "(1)"
- line 253, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 432, "else"
- line 251, "pan.___", state 437, "((i<1))"
- line 251, "pan.___", state 437, "((i>=1))"
- line 257, "pan.___", state 443, "(1)"
- line 257, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 444, "else"
- line 261, "pan.___", state 451, "(1)"
- line 261, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 452, "else"
- line 259, "pan.___", state 457, "((i<2))"
- line 259, "pan.___", state 457, "((i>=2))"
- line 266, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 461, "else"
- line 431, "pan.___", state 463, "(1)"
- line 431, "pan.___", state 463, "(1)"
- line 597, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 468, "(1)"
- line 272, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 483, "(1)"
- line 280, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 519, "(1)"
- line 253, "pan.___", state 527, "(1)"
- line 257, "pan.___", state 539, "(1)"
- line 261, "pan.___", state 547, "(1)"
- line 411, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 629, "(1)"
- line 253, "pan.___", state 637, "(1)"
- line 257, "pan.___", state 649, "(1)"
- line 261, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 747, "(1)"
- line 257, "pan.___", state 767, "(1)"
- line 261, "pan.___", state 775, "(1)"
- line 411, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 796, "(1)"
- line 411, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 797, "else"
- line 411, "pan.___", state 800, "(1)"
- line 415, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 810, "(1)"
- line 415, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 811, "else"
- line 415, "pan.___", state 814, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 413, "pan.___", state 820, "((i<1))"
- line 413, "pan.___", state 820, "((i>=1))"
- line 420, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 828, "(1)"
- line 420, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 829, "else"
- line 420, "pan.___", state 832, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 424, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 842, "(1)"
- line 424, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 843, "else"
- line 424, "pan.___", state 846, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 422, "pan.___", state 852, "((i<2))"
- line 422, "pan.___", state 852, "((i>=2))"
- line 249, "pan.___", state 858, "(1)"
- line 253, "pan.___", state 866, "(1)"
- line 253, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 867, "else"
- line 251, "pan.___", state 872, "((i<1))"
- line 251, "pan.___", state 872, "((i>=1))"
- line 257, "pan.___", state 878, "(1)"
- line 257, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 879, "else"
- line 261, "pan.___", state 886, "(1)"
- line 261, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 887, "else"
- line 259, "pan.___", state 892, "((i<2))"
- line 259, "pan.___", state 892, "((i>=2))"
- line 266, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 896, "else"
- line 431, "pan.___", state 898, "(1)"
- line 431, "pan.___", state 898, "(1)"
- line 605, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 971, "(1)"
- line 253, "pan.___", state 979, "(1)"
- line 257, "pan.___", state 991, "(1)"
- line 261, "pan.___", state 999, "(1)"
- line 411, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1085, "(1)"
- line 257, "pan.___", state 1105, "(1)"
- line 261, "pan.___", state 1113, "(1)"
- line 411, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1200, "(1)"
- line 257, "pan.___", state 1220, "(1)"
- line 261, "pan.___", state 1228, "(1)"
- line 411, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1311, "(1)"
- line 257, "pan.___", state 1331, "(1)"
- line 261, "pan.___", state 1339, "(1)"
- line 272, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1407, "(1)"
- line 253, "pan.___", state 1415, "(1)"
- line 257, "pan.___", state 1427, "(1)"
- line 261, "pan.___", state 1435, "(1)"
- line 411, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1517, "(1)"
- line 253, "pan.___", state 1525, "(1)"
- line 257, "pan.___", state 1537, "(1)"
- line 261, "pan.___", state 1545, "(1)"
- line 411, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1628, "(1)"
- line 253, "pan.___", state 1636, "(1)"
- line 257, "pan.___", state 1648, "(1)"
- line 261, "pan.___", state 1656, "(1)"
- line 411, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1742, "(1)"
- line 257, "pan.___", state 1762, "(1)"
- line 261, "pan.___", state 1770, "(1)"
- line 644, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1860, "(1)"
- line 257, "pan.___", state 1880, "(1)"
- line 261, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1971, "(1)"
- line 257, "pan.___", state 1991, "(1)"
- line 261, "pan.___", state 1999, "(1)"
- line 411, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2022, "(1)"
- line 411, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2023, "else"
- line 411, "pan.___", state 2026, "(1)"
- line 415, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2036, "(1)"
- line 415, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2037, "else"
- line 415, "pan.___", state 2040, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 413, "pan.___", state 2046, "((i<1))"
- line 413, "pan.___", state 2046, "((i>=1))"
- line 420, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2054, "(1)"
- line 420, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2055, "else"
- line 420, "pan.___", state 2058, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 424, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2068, "(1)"
- line 424, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2069, "else"
- line 424, "pan.___", state 2072, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 422, "pan.___", state 2078, "((i<2))"
- line 422, "pan.___", state 2078, "((i>=2))"
- line 249, "pan.___", state 2084, "(1)"
- line 253, "pan.___", state 2092, "(1)"
- line 253, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2093, "else"
- line 251, "pan.___", state 2098, "((i<1))"
- line 251, "pan.___", state 2098, "((i>=1))"
- line 257, "pan.___", state 2104, "(1)"
- line 257, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2105, "else"
- line 261, "pan.___", state 2112, "(1)"
- line 261, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2113, "else"
- line 259, "pan.___", state 2118, "((i<2))"
- line 259, "pan.___", state 2118, "((i>=2))"
- line 266, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2122, "else"
- line 431, "pan.___", state 2124, "(1)"
- line 431, "pan.___", state 2124, "(1)"
- line 644, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2129, "(1)"
- line 272, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2180, "(1)"
- line 253, "pan.___", state 2188, "(1)"
- line 257, "pan.___", state 2200, "(1)"
- line 261, "pan.___", state 2208, "(1)"
- line 411, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2290, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2310, "(1)"
- line 261, "pan.___", state 2318, "(1)"
- line 272, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2387, "(1)"
- line 253, "pan.___", state 2395, "(1)"
- line 257, "pan.___", state 2407, "(1)"
- line 261, "pan.___", state 2415, "(1)"
- line 411, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2497, "(1)"
- line 253, "pan.___", state 2505, "(1)"
- line 257, "pan.___", state 2517, "(1)"
- line 261, "pan.___", state 2525, "(1)"
- line 411, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2608, "(1)"
- line 253, "pan.___", state 2616, "(1)"
- line 257, "pan.___", state 2628, "(1)"
- line 261, "pan.___", state 2636, "(1)"
- line 411, "pan.___", state 2667, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2699, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2713, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2731, "(1)"
- line 257, "pan.___", state 2751, "(1)"
- line 261, "pan.___", state 2759, "(1)"
- line 411, "pan.___", state 2776, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2790, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2808, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2822, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2840, "(1)"
- line 253, "pan.___", state 2848, "(1)"
- line 257, "pan.___", state 2860, "(1)"
- line 261, "pan.___", state 2868, "(1)"
- line 898, "pan.___", state 2887, "-end-"
- (266 of 2887 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 82, "(1)"
- line 253, "pan.___", state 90, "(1)"
- line 257, "pan.___", state 102, "(1)"
- line 272, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 257, "(1)"
- line 253, "pan.___", state 265, "(1)"
- line 257, "pan.___", state 277, "(1)"
- line 261, "pan.___", state 285, "(1)"
- line 415, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 378, "(1)"
- line 257, "pan.___", state 390, "(1)"
- line 261, "pan.___", state 398, "(1)"
- line 415, "pan.___", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 499, "(1)"
- line 257, "pan.___", state 511, "(1)"
- line 261, "pan.___", state 519, "(1)"
- line 415, "pan.___", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 610, "(1)"
- line 257, "pan.___", state 622, "(1)"
- line 261, "pan.___", state 630, "(1)"
- line 415, "pan.___", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 723, "(1)"
- line 257, "pan.___", state 735, "(1)"
- line 261, "pan.___", state 743, "(1)"
- line 272, "pan.___", state 796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 805, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 820, "(1)"
- line 284, "pan.___", state 827, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 843, "(1)"
- line 253, "pan.___", state 851, "(1)"
- line 257, "pan.___", state 863, "(1)"
- line 261, "pan.___", state 871, "(1)"
- line 276, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 909, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 918, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 934, "(1)"
- line 253, "pan.___", state 942, "(1)"
- line 257, "pan.___", state 954, "(1)"
- line 261, "pan.___", state 962, "(1)"
- line 276, "pan.___", state 987, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1000, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1009, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1025, "(1)"
- line 253, "pan.___", state 1033, "(1)"
- line 257, "pan.___", state 1045, "(1)"
- line 261, "pan.___", state 1053, "(1)"
- line 276, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1091, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1100, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1116, "(1)"
- line 253, "pan.___", state 1124, "(1)"
- line 257, "pan.___", state 1136, "(1)"
- line 261, "pan.___", state 1144, "(1)"
- line 1237, "pan.___", state 1159, "-end-"
- (71 of 1159 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 285 seconds
-pan: rate 13484.269 states/second
-pan: avg transition delay 2.8388e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define NO_RMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 4736 States= 1e+06 Transitions= 2.14e+07 Memory= 550.334 t= 59.2 R= 2e+04
-Depth= 4922 States= 2e+06 Transitions= 4.72e+07 Memory= 634.221 t= 132 R= 2e+04
-Depth= 4922 States= 3e+06 Transitions= 7.19e+07 Memory= 718.205 t= 203 R= 1e+04
-pan: resizing hashtable to -w22.. done
-pan: claim violated! (at depth 1295)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 4922, errors: 1
- 3435201 states, stored
- 77730101 states, matched
- 81165302 transitions (= stored+matched)
-1.2953753e+09 atomic steps
-hash conflicts: 60833788 (resolved)
-
-Stats on memory usage (in Megabytes):
- 380.023 equivalent memory usage for states (stored*(State-vector + overhead))
- 296.169 actual memory usage for states (compression: 77.93%)
- state-vector as stored = 62 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 785.752 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 81, "(1)"
- line 257, "pan.___", state 101, "(1)"
- line 261, "pan.___", state 109, "(1)"
- line 597, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 199, "(1)"
- line 257, "pan.___", state 219, "(1)"
- line 261, "pan.___", state 227, "(1)"
- line 411, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 310, "(1)"
- line 257, "pan.___", state 330, "(1)"
- line 261, "pan.___", state 338, "(1)"
- line 411, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 361, "(1)"
- line 411, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 362, "else"
- line 411, "pan.___", state 365, "(1)"
- line 415, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 375, "(1)"
- line 415, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 376, "else"
- line 415, "pan.___", state 379, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 413, "pan.___", state 385, "((i<1))"
- line 413, "pan.___", state 385, "((i>=1))"
- line 420, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 393, "(1)"
- line 420, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 394, "else"
- line 420, "pan.___", state 397, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 424, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 407, "(1)"
- line 424, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 408, "else"
- line 424, "pan.___", state 411, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 422, "pan.___", state 417, "((i<2))"
- line 422, "pan.___", state 417, "((i>=2))"
- line 249, "pan.___", state 423, "(1)"
- line 253, "pan.___", state 431, "(1)"
- line 253, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 432, "else"
- line 251, "pan.___", state 437, "((i<1))"
- line 251, "pan.___", state 437, "((i>=1))"
- line 257, "pan.___", state 443, "(1)"
- line 257, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 444, "else"
- line 261, "pan.___", state 451, "(1)"
- line 261, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 452, "else"
- line 259, "pan.___", state 457, "((i<2))"
- line 259, "pan.___", state 457, "((i>=2))"
- line 266, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 461, "else"
- line 431, "pan.___", state 463, "(1)"
- line 431, "pan.___", state 463, "(1)"
- line 597, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 468, "(1)"
- line 272, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 483, "(1)"
- line 280, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 519, "(1)"
- line 253, "pan.___", state 527, "(1)"
- line 257, "pan.___", state 539, "(1)"
- line 261, "pan.___", state 547, "(1)"
- line 411, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 629, "(1)"
- line 253, "pan.___", state 637, "(1)"
- line 257, "pan.___", state 649, "(1)"
- line 261, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 747, "(1)"
- line 257, "pan.___", state 767, "(1)"
- line 261, "pan.___", state 775, "(1)"
- line 411, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 796, "(1)"
- line 411, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 797, "else"
- line 411, "pan.___", state 800, "(1)"
- line 415, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 810, "(1)"
- line 415, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 811, "else"
- line 415, "pan.___", state 814, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 413, "pan.___", state 820, "((i<1))"
- line 413, "pan.___", state 820, "((i>=1))"
- line 420, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 828, "(1)"
- line 420, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 829, "else"
- line 420, "pan.___", state 832, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 424, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 842, "(1)"
- line 424, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 843, "else"
- line 424, "pan.___", state 846, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 422, "pan.___", state 852, "((i<2))"
- line 422, "pan.___", state 852, "((i>=2))"
- line 249, "pan.___", state 858, "(1)"
- line 253, "pan.___", state 866, "(1)"
- line 253, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 867, "else"
- line 251, "pan.___", state 872, "((i<1))"
- line 251, "pan.___", state 872, "((i>=1))"
- line 257, "pan.___", state 878, "(1)"
- line 257, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 879, "else"
- line 261, "pan.___", state 886, "(1)"
- line 261, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 887, "else"
- line 259, "pan.___", state 892, "((i<2))"
- line 259, "pan.___", state 892, "((i>=2))"
- line 266, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 896, "else"
- line 431, "pan.___", state 898, "(1)"
- line 431, "pan.___", state 898, "(1)"
- line 605, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 971, "(1)"
- line 253, "pan.___", state 979, "(1)"
- line 257, "pan.___", state 991, "(1)"
- line 261, "pan.___", state 999, "(1)"
- line 411, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1085, "(1)"
- line 257, "pan.___", state 1105, "(1)"
- line 261, "pan.___", state 1113, "(1)"
- line 411, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1200, "(1)"
- line 257, "pan.___", state 1220, "(1)"
- line 261, "pan.___", state 1228, "(1)"
- line 411, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1311, "(1)"
- line 257, "pan.___", state 1331, "(1)"
- line 261, "pan.___", state 1339, "(1)"
- line 272, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1407, "(1)"
- line 253, "pan.___", state 1415, "(1)"
- line 257, "pan.___", state 1427, "(1)"
- line 261, "pan.___", state 1435, "(1)"
- line 411, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1517, "(1)"
- line 253, "pan.___", state 1525, "(1)"
- line 257, "pan.___", state 1537, "(1)"
- line 261, "pan.___", state 1545, "(1)"
- line 411, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1628, "(1)"
- line 253, "pan.___", state 1636, "(1)"
- line 257, "pan.___", state 1648, "(1)"
- line 261, "pan.___", state 1656, "(1)"
- line 411, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1742, "(1)"
- line 257, "pan.___", state 1762, "(1)"
- line 261, "pan.___", state 1770, "(1)"
- line 644, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1860, "(1)"
- line 257, "pan.___", state 1880, "(1)"
- line 261, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1971, "(1)"
- line 257, "pan.___", state 1991, "(1)"
- line 261, "pan.___", state 1999, "(1)"
- line 411, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2022, "(1)"
- line 411, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2023, "else"
- line 411, "pan.___", state 2026, "(1)"
- line 415, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2036, "(1)"
- line 415, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2037, "else"
- line 415, "pan.___", state 2040, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 413, "pan.___", state 2046, "((i<1))"
- line 413, "pan.___", state 2046, "((i>=1))"
- line 420, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2054, "(1)"
- line 420, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2055, "else"
- line 420, "pan.___", state 2058, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 424, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2068, "(1)"
- line 424, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2069, "else"
- line 424, "pan.___", state 2072, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 422, "pan.___", state 2078, "((i<2))"
- line 422, "pan.___", state 2078, "((i>=2))"
- line 249, "pan.___", state 2084, "(1)"
- line 253, "pan.___", state 2092, "(1)"
- line 253, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2093, "else"
- line 251, "pan.___", state 2098, "((i<1))"
- line 251, "pan.___", state 2098, "((i>=1))"
- line 257, "pan.___", state 2104, "(1)"
- line 257, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2105, "else"
- line 261, "pan.___", state 2112, "(1)"
- line 261, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2113, "else"
- line 259, "pan.___", state 2118, "((i<2))"
- line 259, "pan.___", state 2118, "((i>=2))"
- line 266, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2122, "else"
- line 431, "pan.___", state 2124, "(1)"
- line 431, "pan.___", state 2124, "(1)"
- line 644, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2129, "(1)"
- line 272, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2180, "(1)"
- line 253, "pan.___", state 2188, "(1)"
- line 257, "pan.___", state 2200, "(1)"
- line 261, "pan.___", state 2208, "(1)"
- line 411, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2290, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2310, "(1)"
- line 261, "pan.___", state 2318, "(1)"
- line 272, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2387, "(1)"
- line 253, "pan.___", state 2395, "(1)"
- line 257, "pan.___", state 2407, "(1)"
- line 261, "pan.___", state 2415, "(1)"
- line 411, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2497, "(1)"
- line 253, "pan.___", state 2505, "(1)"
- line 257, "pan.___", state 2517, "(1)"
- line 261, "pan.___", state 2525, "(1)"
- line 411, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2608, "(1)"
- line 253, "pan.___", state 2616, "(1)"
- line 257, "pan.___", state 2628, "(1)"
- line 261, "pan.___", state 2636, "(1)"
- line 249, "pan.___", state 2667, "(1)"
- line 257, "pan.___", state 2687, "(1)"
- line 261, "pan.___", state 2695, "(1)"
- line 249, "pan.___", state 2710, "(1)"
- line 253, "pan.___", state 2718, "(1)"
- line 257, "pan.___", state 2730, "(1)"
- line 261, "pan.___", state 2738, "(1)"
- line 898, "pan.___", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 19, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 33, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 83, "(1)"
- line 253, "pan.___", state 91, "(1)"
- line 272, "pan.___", state 132, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 134, "(1)"
- line 276, "pan.___", state 141, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 143, "(1)"
- line 276, "pan.___", state 144, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 144, "else"
- line 274, "pan.___", state 149, "((i<1))"
- line 274, "pan.___", state 149, "((i>=1))"
- line 280, "pan.___", state 154, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 156, "(1)"
- line 280, "pan.___", state 157, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 157, "else"
- line 284, "pan.___", state 163, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 165, "(1)"
- line 284, "pan.___", state 166, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 166, "else"
- line 289, "pan.___", state 175, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 175, "else"
- line 411, "pan.___", state 194, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 208, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 226, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 240, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 258, "(1)"
- line 253, "pan.___", state 266, "(1)"
- line 257, "pan.___", state 278, "(1)"
- line 261, "pan.___", state 286, "(1)"
- line 415, "pan.___", state 321, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 339, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 353, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 379, "(1)"
- line 257, "pan.___", state 391, "(1)"
- line 261, "pan.___", state 399, "(1)"
- line 415, "pan.___", state 442, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 460, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 474, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 500, "(1)"
- line 257, "pan.___", state 512, "(1)"
- line 261, "pan.___", state 520, "(1)"
- line 415, "pan.___", state 553, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 571, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 585, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 611, "(1)"
- line 257, "pan.___", state 623, "(1)"
- line 261, "pan.___", state 631, "(1)"
- line 415, "pan.___", state 666, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 684, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 698, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 724, "(1)"
- line 257, "pan.___", state 736, "(1)"
- line 261, "pan.___", state 744, "(1)"
- line 272, "pan.___", state 797, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 806, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 844, "(1)"
- line 253, "pan.___", state 852, "(1)"
- line 257, "pan.___", state 864, "(1)"
- line 261, "pan.___", state 872, "(1)"
- line 276, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 910, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 919, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 935, "(1)"
- line 253, "pan.___", state 943, "(1)"
- line 257, "pan.___", state 955, "(1)"
- line 261, "pan.___", state 963, "(1)"
- line 276, "pan.___", state 988, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1001, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1010, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1026, "(1)"
- line 253, "pan.___", state 1034, "(1)"
- line 257, "pan.___", state 1046, "(1)"
- line 261, "pan.___", state 1054, "(1)"
- line 276, "pan.___", state 1079, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1092, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1101, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1117, "(1)"
- line 253, "pan.___", state 1125, "(1)"
- line 257, "pan.___", state 1137, "(1)"
- line 261, "pan.___", state 1145, "(1)"
- line 1237, "pan.___", state 1160, "-end-"
- (77 of 1160 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 229 seconds
-pan: rate 14976.68 states/second
-pan: avg transition delay 2.826e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define NO_WMB
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:3995
-2:3:3915
-3:3:3918
-4:3:3918
-5:3:3921
-6:3:3929
-7:3:3929
-8:3:3932
-9:3:3938
-10:3:3942
-11:3:3942
-12:3:3945
-13:3:3955
-14:3:3963
-15:3:3963
-16:3:3966
-17:3:3972
-18:3:3976
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-20:3:3979
-21:3:3985
-22:3:3989
-23:3:3990
-24:0:3995
-25:3:3992
-26:0:3995
-27:2:2757
-28:0:3995
-29:2:2763
-30:0:3995
-31:2:2764
-32:0:3995
-33:2:2766
-34:0:3995
-35:2:2767
-36:0:3995
-37:2:2768
-38:0:3995
-39:2:2769
-40:2:2770
-41:2:2774
-42:2:2775
-43:2:2783
-44:2:2784
-45:2:2788
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-47:2:2797
-48:2:2802
-49:2:2806
-50:2:2807
-51:2:2815
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-53:2:2820
-54:2:2821
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-56:2:2816
-57:2:2820
-58:2:2821
-59:2:2829
-60:2:2834
-61:2:2841
-62:2:2842
-63:2:2849
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-66:2:2862
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-70:2:2879
-71:0:3995
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-75:2:2932
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-78:2:2768
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-84:2:3557
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-87:2:3566
-88:2:3571
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-106:0:3995
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-108:2:3533
-109:0:3995
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-118:2:2949
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-128:2:2990
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-131:2:2996
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-140:2:3024
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-144:2:3036
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-146:2:3044
-147:2:3053
-148:0:3995
-149:2:2768
-150:0:3995
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-183:0:3995
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-217:0:3995
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-230:2:3326
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-232:2:3335
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-251:2:3398
-252:0:3995
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-254:0:3995
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-258:2:3416
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-285:2:3514
-286:2:3515
-287:0:3995
-288:2:2768
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-291:0:3995
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-314:2:3895
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-316:2:3903
-317:2:3907
-318:0:3995
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-320:2:3533
-321:0:3995
-322:2:2768
-323:0:3995
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-325:2:3525
-326:0:3995
-327:2:2768
-328:0:3995
-329:2:3529
-330:0:3995
-331:2:3537
-332:0:3995
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-334:0:3995
-335:2:2766
-336:0:3995
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-338:0:3995
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-340:0:3995
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-344:0:3995
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-349:2:2774
-350:2:2775
-351:2:2783
-352:2:2784
-353:2:2788
-354:2:2789
-355:2:2797
-356:2:2802
-357:2:2803
-358:2:2815
-359:2:2816
-360:2:2817
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-364:2:2821
-365:2:2829
-366:2:2834
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-369:2:2849
-370:2:2854
-371:2:2861
-372:2:2862
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-374:2:2862
-375:2:2869
-376:2:2879
-377:0:3995
-378:2:2768
-379:0:3995
-380:2:2938
-381:0:3995
-382:2:3552
-383:2:3553
-384:2:3557
-385:2:3561
-386:2:3562
-387:2:3566
-388:2:3574
-389:2:3575
-390:2:3579
-391:2:3580
-392:2:3579
-393:2:3583
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-395:2:3588
-396:2:3595
-397:2:3602
-398:2:3603
-399:2:3610
-400:2:3615
-401:2:3622
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-403:2:3622
-404:2:3623
-405:2:3630
-406:2:3634
-407:0:3995
-408:2:2940
-409:2:3533
-410:0:3995
-411:2:2768
-412:0:3995
-413:2:2941
-414:0:3995
-415:2:2768
-416:0:3995
-417:2:2944
-418:2:2945
-419:2:2949
-420:2:2950
-421:2:2958
-422:2:2959
-423:2:2963
-424:2:2964
-425:2:2972
-426:2:2977
-427:2:2981
-428:2:2982
-429:2:2990
-430:2:2991
-431:2:2995
-432:2:2996
-433:2:2990
-434:2:2991
-435:2:2995
-436:2:2996
-437:2:3004
-438:2:3009
-439:2:3016
-440:2:3017
-441:2:3024
-442:2:3029
-443:2:3036
-444:2:3037
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+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-Depth= 5162 States= 1e+06 Transitions= 1.79e+07 Memory= 550.334 t= 49 R= 2e+04
-pan: claim violated! (at depth 1059)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 5162, errors: 1
- 1708535 states, stored
- 29763099 states, matched
- 31471634 transitions (= stored+matched)
-4.8935629e+08 atomic steps
-hash conflicts: 14510834 (resolved)
-
-Stats on memory usage (in Megabytes):
- 189.009 equivalent memory usage for states (stored*(State-vector + overhead))
- 144.122 actual memory usage for states (compression: 76.25%)
- state-vector as stored = 60 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 609.807 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 81, "(1)"
- line 257, "pan.___", state 101, "(1)"
- line 261, "pan.___", state 109, "(1)"
- line 597, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 199, "(1)"
- line 257, "pan.___", state 219, "(1)"
- line 261, "pan.___", state 227, "(1)"
- line 411, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 310, "(1)"
- line 257, "pan.___", state 330, "(1)"
- line 261, "pan.___", state 338, "(1)"
- line 411, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 361, "(1)"
- line 411, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 362, "else"
- line 411, "pan.___", state 365, "(1)"
- line 415, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 375, "(1)"
- line 415, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 376, "else"
- line 415, "pan.___", state 379, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 413, "pan.___", state 385, "((i<1))"
- line 413, "pan.___", state 385, "((i>=1))"
- line 420, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 393, "(1)"
- line 420, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 394, "else"
- line 420, "pan.___", state 397, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 424, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 407, "(1)"
- line 424, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 408, "else"
- line 424, "pan.___", state 411, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 422, "pan.___", state 417, "((i<2))"
- line 422, "pan.___", state 417, "((i>=2))"
- line 249, "pan.___", state 423, "(1)"
- line 253, "pan.___", state 431, "(1)"
- line 253, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 432, "else"
- line 251, "pan.___", state 437, "((i<1))"
- line 251, "pan.___", state 437, "((i>=1))"
- line 257, "pan.___", state 443, "(1)"
- line 257, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 444, "else"
- line 261, "pan.___", state 451, "(1)"
- line 261, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 452, "else"
- line 259, "pan.___", state 457, "((i<2))"
- line 259, "pan.___", state 457, "((i>=2))"
- line 266, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 461, "else"
- line 431, "pan.___", state 463, "(1)"
- line 431, "pan.___", state 463, "(1)"
- line 597, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 468, "(1)"
- line 272, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 483, "(1)"
- line 280, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 519, "(1)"
- line 253, "pan.___", state 527, "(1)"
- line 257, "pan.___", state 539, "(1)"
- line 261, "pan.___", state 547, "(1)"
- line 411, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 629, "(1)"
- line 253, "pan.___", state 637, "(1)"
- line 257, "pan.___", state 649, "(1)"
- line 261, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 747, "(1)"
- line 257, "pan.___", state 767, "(1)"
- line 261, "pan.___", state 775, "(1)"
- line 411, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 796, "(1)"
- line 411, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 797, "else"
- line 411, "pan.___", state 800, "(1)"
- line 415, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 810, "(1)"
- line 415, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 811, "else"
- line 415, "pan.___", state 814, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 413, "pan.___", state 820, "((i<1))"
- line 413, "pan.___", state 820, "((i>=1))"
- line 420, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 828, "(1)"
- line 420, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 829, "else"
- line 420, "pan.___", state 832, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 424, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 842, "(1)"
- line 424, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 843, "else"
- line 424, "pan.___", state 846, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 422, "pan.___", state 852, "((i<2))"
- line 422, "pan.___", state 852, "((i>=2))"
- line 249, "pan.___", state 858, "(1)"
- line 253, "pan.___", state 866, "(1)"
- line 253, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 867, "else"
- line 251, "pan.___", state 872, "((i<1))"
- line 251, "pan.___", state 872, "((i>=1))"
- line 257, "pan.___", state 878, "(1)"
- line 257, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 879, "else"
- line 261, "pan.___", state 886, "(1)"
- line 261, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 887, "else"
- line 259, "pan.___", state 892, "((i<2))"
- line 259, "pan.___", state 892, "((i>=2))"
- line 266, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 896, "else"
- line 431, "pan.___", state 898, "(1)"
- line 431, "pan.___", state 898, "(1)"
- line 605, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 971, "(1)"
- line 253, "pan.___", state 979, "(1)"
- line 257, "pan.___", state 991, "(1)"
- line 261, "pan.___", state 999, "(1)"
- line 411, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1085, "(1)"
- line 257, "pan.___", state 1105, "(1)"
- line 261, "pan.___", state 1113, "(1)"
- line 411, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1200, "(1)"
- line 257, "pan.___", state 1220, "(1)"
- line 261, "pan.___", state 1228, "(1)"
- line 411, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1311, "(1)"
- line 257, "pan.___", state 1331, "(1)"
- line 261, "pan.___", state 1339, "(1)"
- line 272, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1407, "(1)"
- line 253, "pan.___", state 1415, "(1)"
- line 257, "pan.___", state 1427, "(1)"
- line 261, "pan.___", state 1435, "(1)"
- line 411, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1517, "(1)"
- line 253, "pan.___", state 1525, "(1)"
- line 257, "pan.___", state 1537, "(1)"
- line 261, "pan.___", state 1545, "(1)"
- line 411, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1628, "(1)"
- line 253, "pan.___", state 1636, "(1)"
- line 257, "pan.___", state 1648, "(1)"
- line 261, "pan.___", state 1656, "(1)"
- line 411, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1742, "(1)"
- line 257, "pan.___", state 1762, "(1)"
- line 261, "pan.___", state 1770, "(1)"
- line 644, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1860, "(1)"
- line 257, "pan.___", state 1880, "(1)"
- line 261, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1971, "(1)"
- line 257, "pan.___", state 1991, "(1)"
- line 261, "pan.___", state 1999, "(1)"
- line 411, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2022, "(1)"
- line 411, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2023, "else"
- line 411, "pan.___", state 2026, "(1)"
- line 415, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2036, "(1)"
- line 415, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2037, "else"
- line 415, "pan.___", state 2040, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 413, "pan.___", state 2046, "((i<1))"
- line 413, "pan.___", state 2046, "((i>=1))"
- line 420, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2054, "(1)"
- line 420, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2055, "else"
- line 420, "pan.___", state 2058, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 424, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2068, "(1)"
- line 424, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2069, "else"
- line 424, "pan.___", state 2072, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 422, "pan.___", state 2078, "((i<2))"
- line 422, "pan.___", state 2078, "((i>=2))"
- line 249, "pan.___", state 2084, "(1)"
- line 253, "pan.___", state 2092, "(1)"
- line 253, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2093, "else"
- line 251, "pan.___", state 2098, "((i<1))"
- line 251, "pan.___", state 2098, "((i>=1))"
- line 257, "pan.___", state 2104, "(1)"
- line 257, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2105, "else"
- line 261, "pan.___", state 2112, "(1)"
- line 261, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2113, "else"
- line 259, "pan.___", state 2118, "((i<2))"
- line 259, "pan.___", state 2118, "((i>=2))"
- line 266, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2122, "else"
- line 431, "pan.___", state 2124, "(1)"
- line 431, "pan.___", state 2124, "(1)"
- line 644, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2129, "(1)"
- line 272, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2180, "(1)"
- line 253, "pan.___", state 2188, "(1)"
- line 257, "pan.___", state 2200, "(1)"
- line 261, "pan.___", state 2208, "(1)"
- line 411, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2290, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2310, "(1)"
- line 261, "pan.___", state 2318, "(1)"
- line 272, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2387, "(1)"
- line 253, "pan.___", state 2395, "(1)"
- line 257, "pan.___", state 2407, "(1)"
- line 261, "pan.___", state 2415, "(1)"
- line 411, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2497, "(1)"
- line 253, "pan.___", state 2505, "(1)"
- line 257, "pan.___", state 2517, "(1)"
- line 261, "pan.___", state 2525, "(1)"
- line 411, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2608, "(1)"
- line 253, "pan.___", state 2616, "(1)"
- line 257, "pan.___", state 2628, "(1)"
- line 261, "pan.___", state 2636, "(1)"
- line 249, "pan.___", state 2667, "(1)"
- line 257, "pan.___", state 2687, "(1)"
- line 261, "pan.___", state 2695, "(1)"
- line 249, "pan.___", state 2710, "(1)"
- line 253, "pan.___", state 2718, "(1)"
- line 257, "pan.___", state 2730, "(1)"
- line 261, "pan.___", state 2738, "(1)"
- line 898, "pan.___", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 22, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 36, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 54, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 86, "(1)"
- line 253, "pan.___", state 94, "(1)"
- line 257, "pan.___", state 106, "(1)"
- line 272, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 144, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 157, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 211, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 229, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 243, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 261, "(1)"
- line 253, "pan.___", state 269, "(1)"
- line 257, "pan.___", state 281, "(1)"
- line 261, "pan.___", state 289, "(1)"
- line 415, "pan.___", state 324, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 342, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 356, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 382, "(1)"
- line 257, "pan.___", state 394, "(1)"
- line 261, "pan.___", state 402, "(1)"
- line 411, "pan.___", state 430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 444, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 462, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 476, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 494, "(1)"
- line 253, "pan.___", state 502, "(1)"
- line 257, "pan.___", state 514, "(1)"
- line 261, "pan.___", state 522, "(1)"
- line 411, "pan.___", state 541, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 543, "(1)"
- line 411, "pan.___", state 544, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 544, "else"
- line 411, "pan.___", state 547, "(1)"
- line 415, "pan.___", state 555, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 557, "(1)"
- line 415, "pan.___", state 558, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 558, "else"
- line 415, "pan.___", state 561, "(1)"
- line 415, "pan.___", state 562, "(1)"
- line 415, "pan.___", state 562, "(1)"
- line 413, "pan.___", state 567, "((i<1))"
- line 413, "pan.___", state 567, "((i>=1))"
- line 420, "pan.___", state 573, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 575, "(1)"
- line 420, "pan.___", state 576, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 576, "else"
- line 420, "pan.___", state 579, "(1)"
- line 420, "pan.___", state 580, "(1)"
- line 420, "pan.___", state 580, "(1)"
- line 424, "pan.___", state 587, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 589, "(1)"
- line 424, "pan.___", state 590, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 590, "else"
- line 424, "pan.___", state 593, "(1)"
- line 424, "pan.___", state 594, "(1)"
- line 424, "pan.___", state 594, "(1)"
- line 422, "pan.___", state 599, "((i<2))"
- line 422, "pan.___", state 599, "((i>=2))"
- line 249, "pan.___", state 605, "(1)"
- line 253, "pan.___", state 613, "(1)"
- line 253, "pan.___", state 614, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 614, "else"
- line 251, "pan.___", state 619, "((i<1))"
- line 251, "pan.___", state 619, "((i>=1))"
- line 257, "pan.___", state 625, "(1)"
- line 257, "pan.___", state 626, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 626, "else"
- line 261, "pan.___", state 633, "(1)"
- line 261, "pan.___", state 634, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 634, "else"
- line 259, "pan.___", state 639, "((i<2))"
- line 259, "pan.___", state 639, "((i>=2))"
- line 266, "pan.___", state 643, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 643, "else"
- line 431, "pan.___", state 645, "(1)"
- line 431, "pan.___", state 645, "(1)"
- line 1117, "pan.___", state 649, "_proc_urcu_writer = (_proc_urcu_writer|(1<<10))"
- line 411, "pan.___", state 654, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 656, "(1)"
- line 411, "pan.___", state 657, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 657, "else"
- line 411, "pan.___", state 660, "(1)"
- line 415, "pan.___", state 668, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 670, "(1)"
- line 415, "pan.___", state 671, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 671, "else"
- line 415, "pan.___", state 674, "(1)"
- line 415, "pan.___", state 675, "(1)"
- line 415, "pan.___", state 675, "(1)"
- line 413, "pan.___", state 680, "((i<1))"
- line 413, "pan.___", state 680, "((i>=1))"
- line 420, "pan.___", state 686, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 688, "(1)"
- line 420, "pan.___", state 689, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 689, "else"
- line 420, "pan.___", state 692, "(1)"
- line 420, "pan.___", state 693, "(1)"
- line 420, "pan.___", state 693, "(1)"
- line 424, "pan.___", state 700, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 702, "(1)"
- line 424, "pan.___", state 703, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 703, "else"
- line 424, "pan.___", state 706, "(1)"
- line 424, "pan.___", state 707, "(1)"
- line 424, "pan.___", state 707, "(1)"
- line 422, "pan.___", state 712, "((i<2))"
- line 422, "pan.___", state 712, "((i>=2))"
- line 249, "pan.___", state 718, "(1)"
- line 253, "pan.___", state 726, "(1)"
- line 253, "pan.___", state 727, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 727, "else"
- line 251, "pan.___", state 732, "((i<1))"
- line 251, "pan.___", state 732, "((i>=1))"
- line 257, "pan.___", state 738, "(1)"
- line 257, "pan.___", state 739, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 739, "else"
- line 261, "pan.___", state 746, "(1)"
- line 261, "pan.___", state 747, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 747, "else"
- line 259, "pan.___", state 752, "((i<2))"
- line 259, "pan.___", state 752, "((i>=2))"
- line 266, "pan.___", state 756, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 756, "else"
- line 431, "pan.___", state 758, "(1)"
- line 431, "pan.___", state 758, "(1)"
- line 1133, "pan.___", state 763, "_proc_urcu_writer = (_proc_urcu_writer|(1<<11))"
- line 1128, "pan.___", state 764, "(((tmp2&((1<<7)-1))&&((tmp2^0)&(1<<7))))"
- line 1128, "pan.___", state 764, "else"
- line 1153, "pan.___", state 768, "_proc_urcu_writer = (_proc_urcu_writer&~(((1<<12)|(1<<11))))"
- line 272, "pan.___", state 799, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 823, "(1)"
- line 284, "pan.___", state 830, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 846, "(1)"
- line 253, "pan.___", state 854, "(1)"
- line 257, "pan.___", state 866, "(1)"
- line 261, "pan.___", state 874, "(1)"
- line 276, "pan.___", state 899, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 912, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 921, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 937, "(1)"
- line 253, "pan.___", state 945, "(1)"
- line 257, "pan.___", state 957, "(1)"
- line 261, "pan.___", state 965, "(1)"
- line 272, "pan.___", state 981, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 272, "pan.___", state 983, "(1)"
- line 276, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 992, "(1)"
- line 276, "pan.___", state 993, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 276, "pan.___", state 993, "else"
- line 274, "pan.___", state 998, "((i<1))"
- line 274, "pan.___", state 998, "((i>=1))"
- line 280, "pan.___", state 1003, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1005, "(1)"
- line 280, "pan.___", state 1006, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 280, "pan.___", state 1006, "else"
- line 284, "pan.___", state 1012, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1014, "(1)"
- line 284, "pan.___", state 1015, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 284, "pan.___", state 1015, "else"
- line 282, "pan.___", state 1020, "((i<2))"
- line 282, "pan.___", state 1020, "((i>=2))"
- line 249, "pan.___", state 1028, "(1)"
- line 253, "pan.___", state 1036, "(1)"
- line 253, "pan.___", state 1037, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 1037, "else"
- line 251, "pan.___", state 1042, "((i<1))"
- line 251, "pan.___", state 1042, "((i>=1))"
- line 257, "pan.___", state 1048, "(1)"
- line 257, "pan.___", state 1049, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 1049, "else"
- line 261, "pan.___", state 1056, "(1)"
- line 261, "pan.___", state 1057, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 1057, "else"
- line 266, "pan.___", state 1066, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 1066, "else"
- line 299, "pan.___", state 1068, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 299, "pan.___", state 1068, "else"
- line 276, "pan.___", state 1081, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1094, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1103, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1119, "(1)"
- line 253, "pan.___", state 1127, "(1)"
- line 257, "pan.___", state 1139, "(1)"
- line 261, "pan.___", state 1147, "(1)"
- line 1237, "pan.___", state 1162, "-end-"
- (145 of 1162 states)
-unreached in proctype :init:
- line 1248, "pan.___", state 9, "((j<2))"
- line 1248, "pan.___", state 9, "((j>=2))"
- line 1249, "pan.___", state 20, "((j<2))"
- line 1249, "pan.___", state 20, "((j>=2))"
- line 1254, "pan.___", state 33, "((j<2))"
- line 1254, "pan.___", state 33, "((j>=2))"
- line 1252, "pan.___", state 43, "((i<1))"
- line 1252, "pan.___", state 43, "((i>=1))"
- line 1262, "pan.___", state 54, "((j<2))"
- line 1262, "pan.___", state 54, "((j>=2))"
- line 1266, "pan.___", state 67, "((j<2))"
- line 1266, "pan.___", state 67, "((j>=2))"
- (6 of 78 states)
-unreached in proctype :never:
- line 1300, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 86.8 seconds
-pan: rate 19690.388 states/second
-pan: avg transition delay 2.7571e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define SINGLE_FLIP
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:3997
-2:3:3917
-3:3:3920
-4:3:3920
-5:3:3923
-6:3:3931
-7:3:3931
-8:3:3934
-9:3:3940
-10:3:3944
-11:3:3944
-12:3:3947
-13:3:3957
-14:3:3965
-15:3:3965
-16:3:3968
-17:3:3974
-18:3:3978
-19:3:3978
-20:3:3981
-21:3:3987
-22:3:3991
-23:3:3992
-24:0:3997
-25:3:3994
-26:0:3997
-27:2:2757
-28:0:3997
-29:2:2763
-30:0:3997
-31:2:2764
-32:0:3997
-33:2:2766
-34:0:3997
-35:2:2767
-36:0:3997
-37:2:2768
-38:0:3997
-39:2:2769
-40:0:3997
-41:2:2770
-42:0:3997
-43:2:2771
-44:0:3997
-45:2:2772
-46:2:2773
-47:2:2777
-48:2:2778
-49:2:2786
-50:2:2787
-51:2:2791
-52:2:2792
-53:2:2800
-54:2:2805
-55:2:2809
-56:2:2810
-57:2:2818
-58:2:2819
-59:2:2823
-60:2:2824
-61:2:2818
-62:2:2819
-63:2:2823
-64:2:2824
-65:2:2832
-66:2:2837
-67:2:2844
-68:2:2845
-69:2:2852
-70:2:2857
-71:2:2864
-72:2:2865
-73:2:2864
-74:2:2865
-75:2:2872
-76:2:2882
-77:0:3997
-78:2:2771
-79:0:3997
-80:2:2886
-81:2:2890
-82:2:2891
-83:2:2895
-84:2:2899
-85:2:2900
-86:2:2904
-87:2:2912
-88:2:2913
-89:2:2917
-90:2:2921
-91:2:2922
-92:2:2917
-93:2:2918
-94:2:2926
-95:0:3997
-96:2:2771
-97:0:3997
-98:2:2934
-99:2:2935
-100:2:2936
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-1020:2:3153
-1021:2:3160
-1022:2:3170
-1023:0:3997
-1024:2:2771
-1025:0:3997
-1026:2:3176
-1027:0:3997
-1028:2:3645
-1029:2:3646
-1030:2:3650
-1031:2:3654
-1032:2:3655
-1033:2:3659
-1034:2:3667
-1035:2:3668
-1036:2:3672
-1037:2:3676
-1038:2:3677
-1039:2:3672
-1040:2:3676
-1041:2:3677
-1042:2:3681
-1043:2:3688
-1044:2:3695
-1045:2:3696
-1046:2:3703
-1047:2:3708
-1048:2:3715
-1049:2:3716
-1050:2:3715
-1051:2:3716
-1052:2:3723
-1053:2:3727
-1054:0:3997
-1055:1:1129
-1056:1:1130
-1057:0:3995
-1058:1:11
-1059:0:4001
-1060:1:1715
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-depth 23: Claim reached state 9 (line 1300)
-depth 1053: Claim reached state 9 (line 1299)
-Depth= 6090 States= 1e+06 Transitions= 2.22e+07 Memory= 510.295 t= 64.5 R= 2e+04
-Depth= 6090 States= 2e+06 Transitions= 5.32e+07 Memory= 552.776 t= 157 R= 1e+04
-Depth= 6090 States= 3e+06 Transitions= 8.56e+07 Memory= 597.014 t= 253 R= 1e+04
-pan: resizing hashtable to -w22.. done
-Depth= 6090 States= 4e+06 Transitions= 1.18e+08 Memory= 672.764 t= 351 R= 1e+04
-Depth= 6090 States= 5e+06 Transitions= 1.49e+08 Memory= 716.416 t= 443 R= 1e+04
-Depth= 6090 States= 6e+06 Transitions= 1.79e+08 Memory= 760.459 t= 531 R= 1e+04
-Depth= 6090 States= 7e+06 Transitions= 2.11e+08 Memory= 804.990 t= 627 R= 1e+04
-Depth= 6090 States= 8e+06 Transitions= 2.44e+08 Memory= 848.057 t= 727 R= 1e+04
-Depth= 6090 States= 9e+06 Transitions= 2.77e+08 Memory= 891.807 t= 827 R= 1e+04
-pan: resizing hashtable to -w24.. done
-Depth= 6090 States= 1e+07 Transitions= 3.11e+08 Memory= 1062.385 t= 928 R= 1e+04
-Depth= 6090 States= 1.1e+07 Transitions= 3.41e+08 Memory= 1105.744 t= 1.02e+03 R= 1e+04
-Depth= 6090 States= 1.2e+07 Transitions= 3.7e+08 Memory= 1151.252 t= 1.1e+03 R= 1e+04
-Depth= 6090 States= 1.3e+07 Transitions= 4.06e+08 Memory= 1193.635 t= 1.21e+03 R= 1e+04
-Depth= 6090 States= 1.4e+07 Transitions= 4.4e+08 Memory= 1236.506 t= 1.31e+03 R= 1e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 6090, errors: 0
- 7774591 states, stored (1.48046e+07 visited)
-4.51403e+08 states, matched
-4.6620756e+08 transitions (= visited+matched)
-7.4729019e+09 atomic steps
-hash conflicts: 1.6384912e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 860.074 equivalent memory usage for states (stored*(State-vector + overhead))
- 689.043 actual memory usage for states (compression: 80.11%)
- state-vector as stored = 65 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1274.299 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 81, "(1)"
- line 257, "pan.___", state 101, "(1)"
- line 261, "pan.___", state 109, "(1)"
- line 597, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 199, "(1)"
- line 257, "pan.___", state 219, "(1)"
- line 261, "pan.___", state 227, "(1)"
- line 411, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 310, "(1)"
- line 257, "pan.___", state 330, "(1)"
- line 261, "pan.___", state 338, "(1)"
- line 411, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 361, "(1)"
- line 411, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 362, "else"
- line 411, "pan.___", state 365, "(1)"
- line 415, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 375, "(1)"
- line 415, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 376, "else"
- line 415, "pan.___", state 379, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 413, "pan.___", state 385, "((i<1))"
- line 413, "pan.___", state 385, "((i>=1))"
- line 420, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 393, "(1)"
- line 420, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 394, "else"
- line 420, "pan.___", state 397, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 424, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 407, "(1)"
- line 424, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 408, "else"
- line 424, "pan.___", state 411, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 422, "pan.___", state 417, "((i<2))"
- line 422, "pan.___", state 417, "((i>=2))"
- line 249, "pan.___", state 423, "(1)"
- line 253, "pan.___", state 431, "(1)"
- line 253, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 432, "else"
- line 251, "pan.___", state 437, "((i<1))"
- line 251, "pan.___", state 437, "((i>=1))"
- line 257, "pan.___", state 443, "(1)"
- line 257, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 444, "else"
- line 261, "pan.___", state 451, "(1)"
- line 261, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 452, "else"
- line 259, "pan.___", state 457, "((i<2))"
- line 259, "pan.___", state 457, "((i>=2))"
- line 266, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 461, "else"
- line 431, "pan.___", state 463, "(1)"
- line 431, "pan.___", state 463, "(1)"
- line 597, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 468, "(1)"
- line 272, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 483, "(1)"
- line 280, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 519, "(1)"
- line 253, "pan.___", state 527, "(1)"
- line 257, "pan.___", state 539, "(1)"
- line 261, "pan.___", state 547, "(1)"
- line 411, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 629, "(1)"
- line 253, "pan.___", state 637, "(1)"
- line 257, "pan.___", state 649, "(1)"
- line 261, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 747, "(1)"
- line 257, "pan.___", state 767, "(1)"
- line 261, "pan.___", state 775, "(1)"
- line 411, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 796, "(1)"
- line 411, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 797, "else"
- line 411, "pan.___", state 800, "(1)"
- line 415, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 810, "(1)"
- line 415, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 811, "else"
- line 415, "pan.___", state 814, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 413, "pan.___", state 820, "((i<1))"
- line 413, "pan.___", state 820, "((i>=1))"
- line 420, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 828, "(1)"
- line 420, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 829, "else"
- line 420, "pan.___", state 832, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 424, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 842, "(1)"
- line 424, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 843, "else"
- line 424, "pan.___", state 846, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 422, "pan.___", state 852, "((i<2))"
- line 422, "pan.___", state 852, "((i>=2))"
- line 249, "pan.___", state 858, "(1)"
- line 253, "pan.___", state 866, "(1)"
- line 253, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 867, "else"
- line 251, "pan.___", state 872, "((i<1))"
- line 251, "pan.___", state 872, "((i>=1))"
- line 257, "pan.___", state 878, "(1)"
- line 257, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 879, "else"
- line 261, "pan.___", state 886, "(1)"
- line 261, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 887, "else"
- line 259, "pan.___", state 892, "((i<2))"
- line 259, "pan.___", state 892, "((i>=2))"
- line 266, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 896, "else"
- line 431, "pan.___", state 898, "(1)"
- line 431, "pan.___", state 898, "(1)"
- line 605, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 971, "(1)"
- line 253, "pan.___", state 979, "(1)"
- line 257, "pan.___", state 991, "(1)"
- line 261, "pan.___", state 999, "(1)"
- line 411, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1085, "(1)"
- line 257, "pan.___", state 1105, "(1)"
- line 261, "pan.___", state 1113, "(1)"
- line 411, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1200, "(1)"
- line 257, "pan.___", state 1220, "(1)"
- line 261, "pan.___", state 1228, "(1)"
- line 411, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1311, "(1)"
- line 257, "pan.___", state 1331, "(1)"
- line 261, "pan.___", state 1339, "(1)"
- line 272, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1407, "(1)"
- line 253, "pan.___", state 1415, "(1)"
- line 257, "pan.___", state 1427, "(1)"
- line 261, "pan.___", state 1435, "(1)"
- line 411, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1517, "(1)"
- line 253, "pan.___", state 1525, "(1)"
- line 257, "pan.___", state 1537, "(1)"
- line 261, "pan.___", state 1545, "(1)"
- line 411, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1628, "(1)"
- line 253, "pan.___", state 1636, "(1)"
- line 257, "pan.___", state 1648, "(1)"
- line 261, "pan.___", state 1656, "(1)"
- line 411, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1742, "(1)"
- line 257, "pan.___", state 1762, "(1)"
- line 261, "pan.___", state 1770, "(1)"
- line 644, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1860, "(1)"
- line 257, "pan.___", state 1880, "(1)"
- line 261, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1971, "(1)"
- line 257, "pan.___", state 1991, "(1)"
- line 261, "pan.___", state 1999, "(1)"
- line 411, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2022, "(1)"
- line 411, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2023, "else"
- line 411, "pan.___", state 2026, "(1)"
- line 415, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2036, "(1)"
- line 415, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2037, "else"
- line 415, "pan.___", state 2040, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 413, "pan.___", state 2046, "((i<1))"
- line 413, "pan.___", state 2046, "((i>=1))"
- line 420, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2054, "(1)"
- line 420, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2055, "else"
- line 420, "pan.___", state 2058, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 424, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2068, "(1)"
- line 424, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2069, "else"
- line 424, "pan.___", state 2072, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 422, "pan.___", state 2078, "((i<2))"
- line 422, "pan.___", state 2078, "((i>=2))"
- line 249, "pan.___", state 2084, "(1)"
- line 253, "pan.___", state 2092, "(1)"
- line 253, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2093, "else"
- line 251, "pan.___", state 2098, "((i<1))"
- line 251, "pan.___", state 2098, "((i>=1))"
- line 257, "pan.___", state 2104, "(1)"
- line 257, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2105, "else"
- line 261, "pan.___", state 2112, "(1)"
- line 261, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2113, "else"
- line 259, "pan.___", state 2118, "((i<2))"
- line 259, "pan.___", state 2118, "((i>=2))"
- line 266, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2122, "else"
- line 431, "pan.___", state 2124, "(1)"
- line 431, "pan.___", state 2124, "(1)"
- line 644, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2129, "(1)"
- line 272, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2180, "(1)"
- line 253, "pan.___", state 2188, "(1)"
- line 257, "pan.___", state 2200, "(1)"
- line 261, "pan.___", state 2208, "(1)"
- line 411, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2290, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2310, "(1)"
- line 261, "pan.___", state 2318, "(1)"
- line 272, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2387, "(1)"
- line 253, "pan.___", state 2395, "(1)"
- line 257, "pan.___", state 2407, "(1)"
- line 261, "pan.___", state 2415, "(1)"
- line 411, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2497, "(1)"
- line 253, "pan.___", state 2505, "(1)"
- line 257, "pan.___", state 2517, "(1)"
- line 261, "pan.___", state 2525, "(1)"
- line 411, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2608, "(1)"
- line 253, "pan.___", state 2616, "(1)"
- line 257, "pan.___", state 2628, "(1)"
- line 261, "pan.___", state 2636, "(1)"
- line 249, "pan.___", state 2667, "(1)"
- line 257, "pan.___", state 2687, "(1)"
- line 261, "pan.___", state 2695, "(1)"
- line 249, "pan.___", state 2710, "(1)"
- line 253, "pan.___", state 2718, "(1)"
- line 257, "pan.___", state 2730, "(1)"
- line 261, "pan.___", state 2738, "(1)"
- line 898, "pan.___", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 82, "(1)"
- line 253, "pan.___", state 90, "(1)"
- line 257, "pan.___", state 102, "(1)"
- line 272, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 257, "(1)"
- line 253, "pan.___", state 265, "(1)"
- line 257, "pan.___", state 277, "(1)"
- line 261, "pan.___", state 285, "(1)"
- line 415, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 378, "(1)"
- line 257, "pan.___", state 390, "(1)"
- line 261, "pan.___", state 398, "(1)"
- line 415, "pan.___", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 499, "(1)"
- line 257, "pan.___", state 511, "(1)"
- line 261, "pan.___", state 519, "(1)"
- line 415, "pan.___", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 610, "(1)"
- line 257, "pan.___", state 622, "(1)"
- line 261, "pan.___", state 630, "(1)"
- line 415, "pan.___", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 723, "(1)"
- line 257, "pan.___", state 735, "(1)"
- line 261, "pan.___", state 743, "(1)"
- line 272, "pan.___", state 791, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 800, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 813, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 838, "(1)"
- line 253, "pan.___", state 846, "(1)"
- line 257, "pan.___", state 858, "(1)"
- line 261, "pan.___", state 866, "(1)"
- line 272, "pan.___", state 886, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 895, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 910, "(1)"
- line 284, "pan.___", state 917, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 933, "(1)"
- line 253, "pan.___", state 941, "(1)"
- line 257, "pan.___", state 953, "(1)"
- line 261, "pan.___", state 961, "(1)"
- line 276, "pan.___", state 986, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 999, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1008, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1024, "(1)"
- line 253, "pan.___", state 1032, "(1)"
- line 257, "pan.___", state 1044, "(1)"
- line 261, "pan.___", state 1052, "(1)"
- line 276, "pan.___", state 1077, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1090, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1099, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1115, "(1)"
- line 253, "pan.___", state 1123, "(1)"
- line 257, "pan.___", state 1135, "(1)"
- line 261, "pan.___", state 1143, "(1)"
- line 276, "pan.___", state 1168, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1181, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1190, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1206, "(1)"
- line 253, "pan.___", state 1214, "(1)"
- line 257, "pan.___", state 1226, "(1)"
- line 261, "pan.___", state 1234, "(1)"
- line 1237, "pan.___", state 1249, "-end-"
- (78 of 1249 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1302, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 1.39e+03 seconds
-pan: rate 10656.973 states/second
-pan: avg transition delay 2.9798e-06 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define READER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1295)
-depth 23: Claim reached state 9 (line 1300)
-depth 1404: Claim reached state 9 (line 1299)
-Depth= 4122 States= 1e+06 Transitions= 2.18e+07 Memory= 494.377 t= 63.1 R= 2e+04
-Depth= 4237 States= 2e+06 Transitions= 4.19e+07 Memory= 522.209 t= 122 R= 2e+04
-Depth= 4557 States= 3e+06 Transitions= 6.67e+07 Memory= 550.139 t= 195 R= 2e+04
-pan: resizing hashtable to -w22.. done
-Depth= 4762 States= 4e+06 Transitions= 9.06e+07 Memory= 609.190 t= 264 R= 2e+04
-Depth= 4793 States= 5e+06 Transitions= 1.25e+08 Memory= 666.709 t= 366 R= 1e+04
-Depth= 4793 States= 6e+06 Transitions= 1.62e+08 Memory= 713.877 t= 473 R= 1e+04
-Depth= 4980 States= 7e+06 Transitions= 1.97e+08 Memory= 760.752 t= 578 R= 1e+04
-Depth= 4980 States= 8e+06 Transitions= 2.29e+08 Memory= 809.190 t= 674 R= 1e+04
-Depth= 4980 States= 9e+06 Transitions= 2.66e+08 Memory= 862.803 t= 784 R= 1e+04
-pan: resizing hashtable to -w24.. done
-Depth= 4980 States= 1e+07 Transitions= 2.98e+08 Memory= 1029.377 t= 880 R= 1e+04
-Depth= 4980 States= 1.1e+07 Transitions= 3.34e+08 Memory= 1080.061 t= 987 R= 1e+04
-Depth= 4980 States= 1.2e+07 Transitions= 3.69e+08 Memory= 1129.279 t= 1.09e+03 R= 1e+04
-Depth= 4980 States= 1.3e+07 Transitions= 4.01e+08 Memory= 1177.912 t= 1.18e+03 R= 1e+04
-Depth= 4980 States= 1.4e+07 Transitions= 4.4e+08 Memory= 1226.447 t= 1.3e+03 R= 1e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 4980, errors: 0
- 7808338 states, stored (1.48869e+07 visited)
-4.5734827e+08 states, matched
-4.7223515e+08 transitions (= visited+matched)
-7.5648218e+09 atomic steps
-hash conflicts: 1.2909926e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 863.807 equivalent memory usage for states (stored*(State-vector + overhead))
- 691.866 actual memory usage for states (compression: 80.09%)
- state-vector as stored = 65 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1277.131 total actual memory usage
-
-unreached in proctype urcu_reader
- line 411, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 81, "(1)"
- line 257, "pan.___", state 101, "(1)"
- line 261, "pan.___", state 109, "(1)"
- line 597, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 411, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 199, "(1)"
- line 257, "pan.___", state 219, "(1)"
- line 261, "pan.___", state 227, "(1)"
- line 411, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 310, "(1)"
- line 257, "pan.___", state 330, "(1)"
- line 261, "pan.___", state 338, "(1)"
- line 411, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 361, "(1)"
- line 411, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 362, "else"
- line 411, "pan.___", state 365, "(1)"
- line 415, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 375, "(1)"
- line 415, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 376, "else"
- line 415, "pan.___", state 379, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 415, "pan.___", state 380, "(1)"
- line 413, "pan.___", state 385, "((i<1))"
- line 413, "pan.___", state 385, "((i>=1))"
- line 420, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 393, "(1)"
- line 420, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 394, "else"
- line 420, "pan.___", state 397, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 420, "pan.___", state 398, "(1)"
- line 424, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 407, "(1)"
- line 424, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 408, "else"
- line 424, "pan.___", state 411, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 424, "pan.___", state 412, "(1)"
- line 422, "pan.___", state 417, "((i<2))"
- line 422, "pan.___", state 417, "((i>=2))"
- line 249, "pan.___", state 423, "(1)"
- line 253, "pan.___", state 431, "(1)"
- line 253, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 432, "else"
- line 251, "pan.___", state 437, "((i<1))"
- line 251, "pan.___", state 437, "((i>=1))"
- line 257, "pan.___", state 443, "(1)"
- line 257, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 444, "else"
- line 261, "pan.___", state 451, "(1)"
- line 261, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 452, "else"
- line 259, "pan.___", state 457, "((i<2))"
- line 259, "pan.___", state 457, "((i>=2))"
- line 266, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 461, "else"
- line 431, "pan.___", state 463, "(1)"
- line 431, "pan.___", state 463, "(1)"
- line 597, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 597, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 597, "pan.___", state 468, "(1)"
- line 272, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 483, "(1)"
- line 280, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 519, "(1)"
- line 253, "pan.___", state 527, "(1)"
- line 257, "pan.___", state 539, "(1)"
- line 261, "pan.___", state 547, "(1)"
- line 411, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 629, "(1)"
- line 253, "pan.___", state 637, "(1)"
- line 257, "pan.___", state 649, "(1)"
- line 261, "pan.___", state 657, "(1)"
- line 411, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 747, "(1)"
- line 257, "pan.___", state 767, "(1)"
- line 261, "pan.___", state 775, "(1)"
- line 411, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 796, "(1)"
- line 411, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 797, "else"
- line 411, "pan.___", state 800, "(1)"
- line 415, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 810, "(1)"
- line 415, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 811, "else"
- line 415, "pan.___", state 814, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 415, "pan.___", state 815, "(1)"
- line 413, "pan.___", state 820, "((i<1))"
- line 413, "pan.___", state 820, "((i>=1))"
- line 420, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 828, "(1)"
- line 420, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 829, "else"
- line 420, "pan.___", state 832, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 420, "pan.___", state 833, "(1)"
- line 424, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 842, "(1)"
- line 424, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 843, "else"
- line 424, "pan.___", state 846, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 424, "pan.___", state 847, "(1)"
- line 422, "pan.___", state 852, "((i<2))"
- line 422, "pan.___", state 852, "((i>=2))"
- line 249, "pan.___", state 858, "(1)"
- line 253, "pan.___", state 866, "(1)"
- line 253, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 867, "else"
- line 251, "pan.___", state 872, "((i<1))"
- line 251, "pan.___", state 872, "((i>=1))"
- line 257, "pan.___", state 878, "(1)"
- line 257, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 879, "else"
- line 261, "pan.___", state 886, "(1)"
- line 261, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 887, "else"
- line 259, "pan.___", state 892, "((i<2))"
- line 259, "pan.___", state 892, "((i>=2))"
- line 266, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 896, "else"
- line 431, "pan.___", state 898, "(1)"
- line 431, "pan.___", state 898, "(1)"
- line 605, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 411, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 971, "(1)"
- line 253, "pan.___", state 979, "(1)"
- line 257, "pan.___", state 991, "(1)"
- line 261, "pan.___", state 999, "(1)"
- line 411, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1085, "(1)"
- line 257, "pan.___", state 1105, "(1)"
- line 261, "pan.___", state 1113, "(1)"
- line 411, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1200, "(1)"
- line 257, "pan.___", state 1220, "(1)"
- line 261, "pan.___", state 1228, "(1)"
- line 411, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1311, "(1)"
- line 257, "pan.___", state 1331, "(1)"
- line 261, "pan.___", state 1339, "(1)"
- line 272, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1407, "(1)"
- line 253, "pan.___", state 1415, "(1)"
- line 257, "pan.___", state 1427, "(1)"
- line 261, "pan.___", state 1435, "(1)"
- line 411, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1517, "(1)"
- line 253, "pan.___", state 1525, "(1)"
- line 257, "pan.___", state 1537, "(1)"
- line 261, "pan.___", state 1545, "(1)"
- line 411, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1628, "(1)"
- line 253, "pan.___", state 1636, "(1)"
- line 257, "pan.___", state 1648, "(1)"
- line 261, "pan.___", state 1656, "(1)"
- line 411, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1742, "(1)"
- line 257, "pan.___", state 1762, "(1)"
- line 261, "pan.___", state 1770, "(1)"
- line 644, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 411, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1860, "(1)"
- line 257, "pan.___", state 1880, "(1)"
- line 261, "pan.___", state 1888, "(1)"
- line 411, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1971, "(1)"
- line 257, "pan.___", state 1991, "(1)"
- line 261, "pan.___", state 1999, "(1)"
- line 411, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 2022, "(1)"
- line 411, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 411, "pan.___", state 2023, "else"
- line 411, "pan.___", state 2026, "(1)"
- line 415, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2036, "(1)"
- line 415, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 415, "pan.___", state 2037, "else"
- line 415, "pan.___", state 2040, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 415, "pan.___", state 2041, "(1)"
- line 413, "pan.___", state 2046, "((i<1))"
- line 413, "pan.___", state 2046, "((i>=1))"
- line 420, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2054, "(1)"
- line 420, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 420, "pan.___", state 2055, "else"
- line 420, "pan.___", state 2058, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 420, "pan.___", state 2059, "(1)"
- line 424, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2068, "(1)"
- line 424, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 424, "pan.___", state 2069, "else"
- line 424, "pan.___", state 2072, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 424, "pan.___", state 2073, "(1)"
- line 422, "pan.___", state 2078, "((i<2))"
- line 422, "pan.___", state 2078, "((i>=2))"
- line 249, "pan.___", state 2084, "(1)"
- line 253, "pan.___", state 2092, "(1)"
- line 253, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 253, "pan.___", state 2093, "else"
- line 251, "pan.___", state 2098, "((i<1))"
- line 251, "pan.___", state 2098, "((i>=1))"
- line 257, "pan.___", state 2104, "(1)"
- line 257, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 257, "pan.___", state 2105, "else"
- line 261, "pan.___", state 2112, "(1)"
- line 261, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 261, "pan.___", state 2113, "else"
- line 259, "pan.___", state 2118, "((i<2))"
- line 259, "pan.___", state 2118, "((i>=2))"
- line 266, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 266, "pan.___", state 2122, "else"
- line 431, "pan.___", state 2124, "(1)"
- line 431, "pan.___", state 2124, "(1)"
- line 644, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 644, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 644, "pan.___", state 2129, "(1)"
- line 272, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2180, "(1)"
- line 253, "pan.___", state 2188, "(1)"
- line 257, "pan.___", state 2200, "(1)"
- line 261, "pan.___", state 2208, "(1)"
- line 411, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2290, "(1)"
- line 253, "pan.___", state 2298, "(1)"
- line 257, "pan.___", state 2310, "(1)"
- line 261, "pan.___", state 2318, "(1)"
- line 272, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2387, "(1)"
- line 253, "pan.___", state 2395, "(1)"
- line 257, "pan.___", state 2407, "(1)"
- line 261, "pan.___", state 2415, "(1)"
- line 411, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2497, "(1)"
- line 253, "pan.___", state 2505, "(1)"
- line 257, "pan.___", state 2517, "(1)"
- line 261, "pan.___", state 2525, "(1)"
- line 411, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 2608, "(1)"
- line 253, "pan.___", state 2616, "(1)"
- line 257, "pan.___", state 2628, "(1)"
- line 261, "pan.___", state 2636, "(1)"
- line 249, "pan.___", state 2667, "(1)"
- line 257, "pan.___", state 2687, "(1)"
- line 261, "pan.___", state 2695, "(1)"
- line 249, "pan.___", state 2710, "(1)"
- line 253, "pan.___", state 2718, "(1)"
- line 257, "pan.___", state 2730, "(1)"
- line 261, "pan.___", state 2738, "(1)"
- line 898, "pan.___", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 411, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 82, "(1)"
- line 253, "pan.___", state 90, "(1)"
- line 257, "pan.___", state 102, "(1)"
- line 272, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 411, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 415, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 257, "(1)"
- line 253, "pan.___", state 265, "(1)"
- line 257, "pan.___", state 277, "(1)"
- line 261, "pan.___", state 285, "(1)"
- line 415, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 378, "(1)"
- line 257, "pan.___", state 390, "(1)"
- line 261, "pan.___", state 398, "(1)"
- line 415, "pan.___", state 441, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 459, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 473, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 499, "(1)"
- line 257, "pan.___", state 511, "(1)"
- line 261, "pan.___", state 519, "(1)"
- line 415, "pan.___", state 552, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 570, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 584, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 610, "(1)"
- line 257, "pan.___", state 622, "(1)"
- line 261, "pan.___", state 630, "(1)"
- line 415, "pan.___", state 665, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 420, "pan.___", state 683, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 424, "pan.___", state 697, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 253, "pan.___", state 723, "(1)"
- line 257, "pan.___", state 735, "(1)"
- line 261, "pan.___", state 743, "(1)"
- line 272, "pan.___", state 796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 276, "pan.___", state 805, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 820, "(1)"
- line 284, "pan.___", state 827, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 843, "(1)"
- line 253, "pan.___", state 851, "(1)"
- line 257, "pan.___", state 863, "(1)"
- line 261, "pan.___", state 871, "(1)"
- line 276, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 909, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 918, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 934, "(1)"
- line 253, "pan.___", state 942, "(1)"
- line 257, "pan.___", state 954, "(1)"
- line 261, "pan.___", state 962, "(1)"
- line 276, "pan.___", state 987, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1000, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1009, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1025, "(1)"
- line 253, "pan.___", state 1033, "(1)"
- line 257, "pan.___", state 1045, "(1)"
- line 261, "pan.___", state 1053, "(1)"
- line 276, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 280, "pan.___", state 1091, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 284, "pan.___", state 1100, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 249, "pan.___", state 1116, "(1)"
- line 253, "pan.___", state 1124, "(1)"
- line 257, "pan.___", state 1136, "(1)"
- line 261, "pan.___", state 1144, "(1)"
- line 1237, "pan.___", state 1159, "-end-"
- (71 of 1159 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1302, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 1.4e+03 seconds
-pan: rate 10667.087 states/second
-pan: avg transition delay 2.9553e-06 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 1296)
-depth 23: Claim reached state 9 (line 1301)
-depth 1404: Claim reached state 9 (line 1300)
-pan: acceptance cycle (at depth 1950)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 4997, errors: 1
- 64372 states, stored (197067 visited)
- 2733089 states, matched
- 2930156 transitions (= visited+matched)
- 44244571 atomic steps
-hash conflicts: 43483 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7.121 equivalent memory usage for states (stored*(State-vector + overhead))
- 6.154 actual memory usage for states (compression: 86.41%)
- state-vector as stored = 72 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 471.818 total actual memory usage
-
-unreached in proctype urcu_reader
- line 412, "pan.___", state 17, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 49, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 63, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 81, "(1)"
- line 258, "pan.___", state 101, "(1)"
- line 262, "pan.___", state 109, "(1)"
- line 598, "pan.___", state 128, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<1))"
- line 412, "pan.___", state 135, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 167, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 181, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 199, "(1)"
- line 258, "pan.___", state 219, "(1)"
- line 262, "pan.___", state 227, "(1)"
- line 412, "pan.___", state 246, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 278, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 292, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 310, "(1)"
- line 258, "pan.___", state 330, "(1)"
- line 262, "pan.___", state 338, "(1)"
- line 412, "pan.___", state 359, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 361, "(1)"
- line 412, "pan.___", state 362, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 362, "else"
- line 412, "pan.___", state 365, "(1)"
- line 416, "pan.___", state 373, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 375, "(1)"
- line 416, "pan.___", state 376, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 376, "else"
- line 416, "pan.___", state 379, "(1)"
- line 416, "pan.___", state 380, "(1)"
- line 416, "pan.___", state 380, "(1)"
- line 414, "pan.___", state 385, "((i<1))"
- line 414, "pan.___", state 385, "((i>=1))"
- line 421, "pan.___", state 391, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 393, "(1)"
- line 421, "pan.___", state 394, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 394, "else"
- line 421, "pan.___", state 397, "(1)"
- line 421, "pan.___", state 398, "(1)"
- line 421, "pan.___", state 398, "(1)"
- line 425, "pan.___", state 405, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 407, "(1)"
- line 425, "pan.___", state 408, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 408, "else"
- line 425, "pan.___", state 411, "(1)"
- line 425, "pan.___", state 412, "(1)"
- line 425, "pan.___", state 412, "(1)"
- line 423, "pan.___", state 417, "((i<2))"
- line 423, "pan.___", state 417, "((i>=2))"
- line 250, "pan.___", state 423, "(1)"
- line 254, "pan.___", state 431, "(1)"
- line 254, "pan.___", state 432, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 432, "else"
- line 252, "pan.___", state 437, "((i<1))"
- line 252, "pan.___", state 437, "((i>=1))"
- line 258, "pan.___", state 443, "(1)"
- line 258, "pan.___", state 444, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 444, "else"
- line 262, "pan.___", state 451, "(1)"
- line 262, "pan.___", state 452, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 452, "else"
- line 260, "pan.___", state 457, "((i<2))"
- line 260, "pan.___", state 457, "((i>=2))"
- line 267, "pan.___", state 461, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 461, "else"
- line 432, "pan.___", state 463, "(1)"
- line 432, "pan.___", state 463, "(1)"
- line 598, "pan.___", state 466, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 598, "pan.___", state 467, "_proc_urcu_reader = (_proc_urcu_reader|(1<<5))"
- line 598, "pan.___", state 468, "(1)"
- line 273, "pan.___", state 472, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 483, "(1)"
- line 281, "pan.___", state 494, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 503, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 519, "(1)"
- line 254, "pan.___", state 527, "(1)"
- line 258, "pan.___", state 539, "(1)"
- line 262, "pan.___", state 547, "(1)"
- line 412, "pan.___", state 565, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 579, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 597, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 611, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 629, "(1)"
- line 254, "pan.___", state 637, "(1)"
- line 258, "pan.___", state 649, "(1)"
- line 262, "pan.___", state 657, "(1)"
- line 412, "pan.___", state 683, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 715, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 729, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 747, "(1)"
- line 258, "pan.___", state 767, "(1)"
- line 262, "pan.___", state 775, "(1)"
- line 412, "pan.___", state 794, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 796, "(1)"
- line 412, "pan.___", state 797, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 797, "else"
- line 412, "pan.___", state 800, "(1)"
- line 416, "pan.___", state 808, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 810, "(1)"
- line 416, "pan.___", state 811, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 811, "else"
- line 416, "pan.___", state 814, "(1)"
- line 416, "pan.___", state 815, "(1)"
- line 416, "pan.___", state 815, "(1)"
- line 414, "pan.___", state 820, "((i<1))"
- line 414, "pan.___", state 820, "((i>=1))"
- line 421, "pan.___", state 826, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 828, "(1)"
- line 421, "pan.___", state 829, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 829, "else"
- line 421, "pan.___", state 832, "(1)"
- line 421, "pan.___", state 833, "(1)"
- line 421, "pan.___", state 833, "(1)"
- line 425, "pan.___", state 840, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 842, "(1)"
- line 425, "pan.___", state 843, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 843, "else"
- line 425, "pan.___", state 846, "(1)"
- line 425, "pan.___", state 847, "(1)"
- line 425, "pan.___", state 847, "(1)"
- line 423, "pan.___", state 852, "((i<2))"
- line 423, "pan.___", state 852, "((i>=2))"
- line 250, "pan.___", state 858, "(1)"
- line 254, "pan.___", state 866, "(1)"
- line 254, "pan.___", state 867, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 867, "else"
- line 252, "pan.___", state 872, "((i<1))"
- line 252, "pan.___", state 872, "((i>=1))"
- line 258, "pan.___", state 878, "(1)"
- line 258, "pan.___", state 879, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 879, "else"
- line 262, "pan.___", state 886, "(1)"
- line 262, "pan.___", state 887, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 887, "else"
- line 260, "pan.___", state 892, "((i<2))"
- line 260, "pan.___", state 892, "((i>=2))"
- line 267, "pan.___", state 896, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 896, "else"
- line 432, "pan.___", state 898, "(1)"
- line 432, "pan.___", state 898, "(1)"
- line 606, "pan.___", state 902, "_proc_urcu_reader = (_proc_urcu_reader|(1<<11))"
- line 412, "pan.___", state 907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 921, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 971, "(1)"
- line 254, "pan.___", state 979, "(1)"
- line 258, "pan.___", state 991, "(1)"
- line 262, "pan.___", state 999, "(1)"
- line 412, "pan.___", state 1021, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1053, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1067, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1085, "(1)"
- line 258, "pan.___", state 1105, "(1)"
- line 262, "pan.___", state 1113, "(1)"
- line 412, "pan.___", state 1136, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1168, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1182, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1200, "(1)"
- line 258, "pan.___", state 1220, "(1)"
- line 262, "pan.___", state 1228, "(1)"
- line 412, "pan.___", state 1247, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1279, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1293, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1311, "(1)"
- line 258, "pan.___", state 1331, "(1)"
- line 262, "pan.___", state 1339, "(1)"
- line 273, "pan.___", state 1360, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 1382, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 1391, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1407, "(1)"
- line 254, "pan.___", state 1415, "(1)"
- line 258, "pan.___", state 1427, "(1)"
- line 262, "pan.___", state 1435, "(1)"
- line 412, "pan.___", state 1453, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 1467, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1485, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1499, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1517, "(1)"
- line 254, "pan.___", state 1525, "(1)"
- line 258, "pan.___", state 1537, "(1)"
- line 262, "pan.___", state 1545, "(1)"
- line 412, "pan.___", state 1564, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1596, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1610, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1628, "(1)"
- line 254, "pan.___", state 1636, "(1)"
- line 258, "pan.___", state 1648, "(1)"
- line 262, "pan.___", state 1656, "(1)"
- line 412, "pan.___", state 1678, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1710, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1724, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1742, "(1)"
- line 258, "pan.___", state 1762, "(1)"
- line 262, "pan.___", state 1770, "(1)"
- line 645, "pan.___", state 1789, "_proc_urcu_reader = (_proc_urcu_reader|((1<<2)<<19))"
- line 412, "pan.___", state 1796, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1828, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1842, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1860, "(1)"
- line 258, "pan.___", state 1880, "(1)"
- line 262, "pan.___", state 1888, "(1)"
- line 412, "pan.___", state 1907, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 1939, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 1953, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1971, "(1)"
- line 258, "pan.___", state 1991, "(1)"
- line 262, "pan.___", state 1999, "(1)"
- line 412, "pan.___", state 2020, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 2022, "(1)"
- line 412, "pan.___", state 2023, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 2023, "else"
- line 412, "pan.___", state 2026, "(1)"
- line 416, "pan.___", state 2034, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2036, "(1)"
- line 416, "pan.___", state 2037, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 2037, "else"
- line 416, "pan.___", state 2040, "(1)"
- line 416, "pan.___", state 2041, "(1)"
- line 416, "pan.___", state 2041, "(1)"
- line 414, "pan.___", state 2046, "((i<1))"
- line 414, "pan.___", state 2046, "((i>=1))"
- line 421, "pan.___", state 2052, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2054, "(1)"
- line 421, "pan.___", state 2055, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 2055, "else"
- line 421, "pan.___", state 2058, "(1)"
- line 421, "pan.___", state 2059, "(1)"
- line 421, "pan.___", state 2059, "(1)"
- line 425, "pan.___", state 2066, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2068, "(1)"
- line 425, "pan.___", state 2069, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 2069, "else"
- line 425, "pan.___", state 2072, "(1)"
- line 425, "pan.___", state 2073, "(1)"
- line 425, "pan.___", state 2073, "(1)"
- line 423, "pan.___", state 2078, "((i<2))"
- line 423, "pan.___", state 2078, "((i>=2))"
- line 250, "pan.___", state 2084, "(1)"
- line 254, "pan.___", state 2092, "(1)"
- line 254, "pan.___", state 2093, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 2093, "else"
- line 252, "pan.___", state 2098, "((i<1))"
- line 252, "pan.___", state 2098, "((i>=1))"
- line 258, "pan.___", state 2104, "(1)"
- line 258, "pan.___", state 2105, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 2105, "else"
- line 262, "pan.___", state 2112, "(1)"
- line 262, "pan.___", state 2113, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 2113, "else"
- line 260, "pan.___", state 2118, "((i<2))"
- line 260, "pan.___", state 2118, "((i>=2))"
- line 267, "pan.___", state 2122, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 2122, "else"
- line 432, "pan.___", state 2124, "(1)"
- line 432, "pan.___", state 2124, "(1)"
- line 645, "pan.___", state 2127, "cached_urcu_active_readers.val[_pid] = (tmp+1)"
- line 645, "pan.___", state 2128, "_proc_urcu_reader = (_proc_urcu_reader|(1<<23))"
- line 645, "pan.___", state 2129, "(1)"
- line 273, "pan.___", state 2133, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 2155, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 2164, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2180, "(1)"
- line 254, "pan.___", state 2188, "(1)"
- line 258, "pan.___", state 2200, "(1)"
- line 262, "pan.___", state 2208, "(1)"
- line 412, "pan.___", state 2226, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2240, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2258, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2272, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2290, "(1)"
- line 254, "pan.___", state 2298, "(1)"
- line 258, "pan.___", state 2310, "(1)"
- line 262, "pan.___", state 2318, "(1)"
- line 273, "pan.___", state 2340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 2349, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 2362, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 2371, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2387, "(1)"
- line 254, "pan.___", state 2395, "(1)"
- line 258, "pan.___", state 2407, "(1)"
- line 262, "pan.___", state 2415, "(1)"
- line 412, "pan.___", state 2433, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2447, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2465, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2479, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2497, "(1)"
- line 254, "pan.___", state 2505, "(1)"
- line 258, "pan.___", state 2517, "(1)"
- line 262, "pan.___", state 2525, "(1)"
- line 412, "pan.___", state 2544, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 2558, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 2576, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 2590, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 2608, "(1)"
- line 254, "pan.___", state 2616, "(1)"
- line 258, "pan.___", state 2628, "(1)"
- line 262, "pan.___", state 2636, "(1)"
- line 250, "pan.___", state 2667, "(1)"
- line 258, "pan.___", state 2687, "(1)"
- line 262, "pan.___", state 2695, "(1)"
- line 250, "pan.___", state 2710, "(1)"
- line 254, "pan.___", state 2718, "(1)"
- line 258, "pan.___", state 2730, "(1)"
- line 262, "pan.___", state 2738, "(1)"
- line 899, "pan.___", state 2755, "-end-"
- (259 of 2755 states)
-unreached in proctype urcu_writer
- line 412, "pan.___", state 18, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 24, "(1)"
- line 416, "pan.___", state 32, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 38, "(1)"
- line 416, "pan.___", state 39, "(1)"
- line 416, "pan.___", state 39, "(1)"
- line 414, "pan.___", state 44, "((i<1))"
- line 414, "pan.___", state 44, "((i>=1))"
- line 421, "pan.___", state 50, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 56, "(1)"
- line 421, "pan.___", state 57, "(1)"
- line 421, "pan.___", state 57, "(1)"
- line 425, "pan.___", state 64, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 70, "(1)"
- line 425, "pan.___", state 71, "(1)"
- line 425, "pan.___", state 71, "(1)"
- line 423, "pan.___", state 76, "((i<2))"
- line 423, "pan.___", state 76, "((i>=2))"
- line 250, "pan.___", state 82, "(1)"
- line 254, "pan.___", state 90, "(1)"
- line 254, "pan.___", state 91, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 91, "else"
- line 252, "pan.___", state 96, "((i<1))"
- line 252, "pan.___", state 96, "((i>=1))"
- line 258, "pan.___", state 102, "(1)"
- line 258, "pan.___", state 103, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 103, "else"
- line 262, "pan.___", state 110, "(1)"
- line 262, "pan.___", state 111, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 111, "else"
- line 260, "pan.___", state 116, "((i<2))"
- line 260, "pan.___", state 116, "((i>=2))"
- line 267, "pan.___", state 120, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 120, "else"
- line 432, "pan.___", state 122, "(1)"
- line 432, "pan.___", state 122, "(1)"
- line 273, "pan.___", state 131, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 140, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 148, "((i<1))"
- line 275, "pan.___", state 148, "((i>=1))"
- line 281, "pan.___", state 153, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 1022, "pan.___", state 181, "old_data = cached_rcu_ptr.val[_pid]"
- line 412, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 199, "(1)"
- line 416, "pan.___", state 207, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 213, "(1)"
- line 416, "pan.___", state 214, "(1)"
- line 416, "pan.___", state 214, "(1)"
- line 414, "pan.___", state 219, "((i<1))"
- line 414, "pan.___", state 219, "((i>=1))"
- line 421, "pan.___", state 225, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 231, "(1)"
- line 421, "pan.___", state 232, "(1)"
- line 421, "pan.___", state 232, "(1)"
- line 425, "pan.___", state 239, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 245, "(1)"
- line 425, "pan.___", state 246, "(1)"
- line 425, "pan.___", state 246, "(1)"
- line 423, "pan.___", state 251, "((i<2))"
- line 423, "pan.___", state 251, "((i>=2))"
- line 250, "pan.___", state 257, "(1)"
- line 254, "pan.___", state 265, "(1)"
- line 254, "pan.___", state 266, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 266, "else"
- line 252, "pan.___", state 271, "((i<1))"
- line 252, "pan.___", state 271, "((i>=1))"
- line 258, "pan.___", state 277, "(1)"
- line 258, "pan.___", state 278, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 278, "else"
- line 262, "pan.___", state 285, "(1)"
- line 262, "pan.___", state 286, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 286, "else"
- line 260, "pan.___", state 291, "((i<2))"
- line 260, "pan.___", state 291, "((i>=2))"
- line 267, "pan.___", state 295, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 295, "else"
- line 432, "pan.___", state 297, "(1)"
- line 432, "pan.___", state 297, "(1)"
- line 412, "pan.___", state 308, "(1)"
- line 412, "pan.___", state 309, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 309, "else"
- line 412, "pan.___", state 312, "(1)"
- line 416, "pan.___", state 320, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 326, "(1)"
- line 416, "pan.___", state 327, "(1)"
- line 416, "pan.___", state 327, "(1)"
- line 414, "pan.___", state 332, "((i<1))"
- line 414, "pan.___", state 332, "((i>=1))"
- line 421, "pan.___", state 338, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 344, "(1)"
- line 421, "pan.___", state 345, "(1)"
- line 421, "pan.___", state 345, "(1)"
- line 425, "pan.___", state 352, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 358, "(1)"
- line 425, "pan.___", state 359, "(1)"
- line 425, "pan.___", state 359, "(1)"
- line 423, "pan.___", state 364, "((i<2))"
- line 423, "pan.___", state 364, "((i>=2))"
- line 250, "pan.___", state 370, "(1)"
- line 254, "pan.___", state 378, "(1)"
- line 254, "pan.___", state 379, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 379, "else"
- line 252, "pan.___", state 384, "((i<1))"
- line 252, "pan.___", state 384, "((i>=1))"
- line 258, "pan.___", state 390, "(1)"
- line 258, "pan.___", state 391, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 391, "else"
- line 262, "pan.___", state 398, "(1)"
- line 262, "pan.___", state 399, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 399, "else"
- line 260, "pan.___", state 404, "((i<2))"
- line 260, "pan.___", state 404, "((i>=2))"
- line 267, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 408, "else"
- line 432, "pan.___", state 410, "(1)"
- line 432, "pan.___", state 410, "(1)"
- line 412, "pan.___", state 423, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 425, "(1)"
- line 412, "pan.___", state 426, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 412, "pan.___", state 426, "else"
- line 412, "pan.___", state 429, "(1)"
- line 416, "pan.___", state 437, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 439, "(1)"
- line 416, "pan.___", state 440, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 416, "pan.___", state 440, "else"
- line 416, "pan.___", state 443, "(1)"
- line 416, "pan.___", state 444, "(1)"
- line 416, "pan.___", state 444, "(1)"
- line 414, "pan.___", state 449, "((i<1))"
- line 414, "pan.___", state 449, "((i>=1))"
- line 421, "pan.___", state 455, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 457, "(1)"
- line 421, "pan.___", state 458, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 421, "pan.___", state 458, "else"
- line 421, "pan.___", state 461, "(1)"
- line 421, "pan.___", state 462, "(1)"
- line 421, "pan.___", state 462, "(1)"
- line 425, "pan.___", state 469, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 471, "(1)"
- line 425, "pan.___", state 472, "((cache_dirty_rcu_data[i].bitfield&(1<<_pid)))"
- line 425, "pan.___", state 472, "else"
- line 425, "pan.___", state 475, "(1)"
- line 425, "pan.___", state 476, "(1)"
- line 425, "pan.___", state 476, "(1)"
- line 423, "pan.___", state 481, "((i<2))"
- line 423, "pan.___", state 481, "((i>=2))"
- line 250, "pan.___", state 487, "(1)"
- line 254, "pan.___", state 495, "(1)"
- line 254, "pan.___", state 496, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 496, "else"
- line 252, "pan.___", state 501, "((i<1))"
- line 252, "pan.___", state 501, "((i>=1))"
- line 258, "pan.___", state 507, "(1)"
- line 258, "pan.___", state 508, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 508, "else"
- line 262, "pan.___", state 515, "(1)"
- line 262, "pan.___", state 516, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 516, "else"
- line 267, "pan.___", state 525, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 525, "else"
- line 432, "pan.___", state 527, "(1)"
- line 432, "pan.___", state 527, "(1)"
- line 412, "pan.___", state 533, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 539, "(1)"
- line 416, "pan.___", state 547, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 553, "(1)"
- line 416, "pan.___", state 554, "(1)"
- line 416, "pan.___", state 554, "(1)"
- line 414, "pan.___", state 559, "((i<1))"
- line 414, "pan.___", state 559, "((i>=1))"
- line 421, "pan.___", state 565, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 571, "(1)"
- line 421, "pan.___", state 572, "(1)"
- line 421, "pan.___", state 572, "(1)"
- line 425, "pan.___", state 579, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 585, "(1)"
- line 425, "pan.___", state 586, "(1)"
- line 425, "pan.___", state 586, "(1)"
- line 423, "pan.___", state 591, "((i<2))"
- line 423, "pan.___", state 591, "((i>=2))"
- line 250, "pan.___", state 597, "(1)"
- line 254, "pan.___", state 605, "(1)"
- line 254, "pan.___", state 606, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 606, "else"
- line 252, "pan.___", state 611, "((i<1))"
- line 252, "pan.___", state 611, "((i>=1))"
- line 258, "pan.___", state 617, "(1)"
- line 258, "pan.___", state 618, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 618, "else"
- line 262, "pan.___", state 625, "(1)"
- line 262, "pan.___", state 626, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 626, "else"
- line 267, "pan.___", state 635, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 635, "else"
- line 432, "pan.___", state 637, "(1)"
- line 432, "pan.___", state 637, "(1)"
- line 412, "pan.___", state 644, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 650, "(1)"
- line 416, "pan.___", state 658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 416, "pan.___", state 664, "(1)"
- line 416, "pan.___", state 665, "(1)"
- line 416, "pan.___", state 665, "(1)"
- line 414, "pan.___", state 670, "((i<1))"
- line 414, "pan.___", state 670, "((i>=1))"
- line 421, "pan.___", state 676, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 682, "(1)"
- line 421, "pan.___", state 683, "(1)"
- line 421, "pan.___", state 683, "(1)"
- line 425, "pan.___", state 690, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 696, "(1)"
- line 425, "pan.___", state 697, "(1)"
- line 425, "pan.___", state 697, "(1)"
- line 423, "pan.___", state 702, "((i<2))"
- line 423, "pan.___", state 702, "((i>=2))"
- line 250, "pan.___", state 708, "(1)"
- line 254, "pan.___", state 716, "(1)"
- line 254, "pan.___", state 717, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 717, "else"
- line 252, "pan.___", state 722, "((i<1))"
- line 252, "pan.___", state 722, "((i>=1))"
- line 258, "pan.___", state 728, "(1)"
- line 258, "pan.___", state 729, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 729, "else"
- line 262, "pan.___", state 736, "(1)"
- line 262, "pan.___", state 737, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 737, "else"
- line 260, "pan.___", state 742, "((i<2))"
- line 260, "pan.___", state 742, "((i>=2))"
- line 267, "pan.___", state 746, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 746, "else"
- line 432, "pan.___", state 748, "(1)"
- line 432, "pan.___", state 748, "(1)"
- line 416, "pan.___", state 771, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 789, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 803, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 254, "pan.___", state 829, "(1)"
- line 258, "pan.___", state 841, "(1)"
- line 262, "pan.___", state 849, "(1)"
- line 416, "pan.___", state 887, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 421, "pan.___", state 905, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 425, "pan.___", state 919, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 254, "pan.___", state 945, "(1)"
- line 258, "pan.___", state 957, "(1)"
- line 262, "pan.___", state 965, "(1)"
- line 273, "pan.___", state 1009, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 277, "pan.___", state 1018, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 275, "pan.___", state 1026, "((i<1))"
- line 275, "pan.___", state 1026, "((i>=1))"
- line 281, "pan.___", state 1033, "(1)"
- line 281, "pan.___", state 1034, "((cache_dirty_rcu_ptr.bitfield&(1<<_pid)))"
- line 281, "pan.___", state 1034, "else"
- line 285, "pan.___", state 1040, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 283, "pan.___", state 1048, "((i<2))"
- line 283, "pan.___", state 1048, "((i>=2))"
- line 250, "pan.___", state 1056, "(1)"
- line 254, "pan.___", state 1064, "(1)"
- line 254, "pan.___", state 1065, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 254, "pan.___", state 1065, "else"
- line 252, "pan.___", state 1070, "((i<1))"
- line 252, "pan.___", state 1070, "((i>=1))"
- line 258, "pan.___", state 1076, "(1)"
- line 258, "pan.___", state 1077, "(!((cache_dirty_rcu_ptr.bitfield&(1<<_pid))))"
- line 258, "pan.___", state 1077, "else"
- line 262, "pan.___", state 1084, "(1)"
- line 262, "pan.___", state 1085, "(!((cache_dirty_rcu_data[i].bitfield&(1<<_pid))))"
- line 262, "pan.___", state 1085, "else"
- line 267, "pan.___", state 1094, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 267, "pan.___", state 1094, "else"
- line 277, "pan.___", state 1109, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 281, "pan.___", state 1122, "cache_dirty_rcu_ptr.bitfield = (cache_dirty_rcu_ptr.bitfield&~((1<<_pid)))"
- line 285, "pan.___", state 1131, "cache_dirty_rcu_data[i].bitfield = (cache_dirty_rcu_data[i].bitfield&~((1<<_pid)))"
- line 250, "pan.___", state 1147, "(1)"
- line 254, "pan.___", state 1155, "(1)"
- line 258, "pan.___", state 1167, "(1)"
- line 262, "pan.___", state 1175, "(1)"
- line 1238, "pan.___", state 1190, "-end-"
- (192 of 1190 states)
-unreached in proctype :init:
- (0 of 78 states)
-unreached in proctype :never:
- line 1303, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 8.1 seconds
-pan: rate 24329.259 states/second
-pan: avg transition delay 2.7644e-06 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu-controldataflow-intel-no-ipi'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-//#define ARCH_ALPHA
-#define ARCH_INTEL
-//#define ARCH_POWERPC
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bitfield cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(rcu_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE, j);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON, j);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:4025
-2:3:3945
-3:3:3948
-4:3:3948
-5:3:3951
-6:3:3959
-7:3:3959
-8:3:3962
-9:3:3968
-10:3:3972
-11:3:3972
-12:3:3975
-13:3:3985
-14:3:3993
-15:3:3993
-16:3:3996
-17:3:4002
-18:3:4006
-19:3:4006
-20:3:4009
-21:3:4015
-22:3:4019
-23:3:4020
-24:0:4025
-25:3:4022
-26:0:4025
-27:2:2757
-28:0:4025
-29:2:2763
-30:0:4025
-31:2:2764
-32:0:4025
-33:2:2765
-34:0:4023
-35:2:2766
-36:0:4029
-37:2:2767
-38:0:4029
-39:2:2768
-40:2:2769
-41:2:2773
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-43:2:2782
-44:2:2783
-45:2:2787
-46:2:2788
-47:2:2796
-48:2:2801
-49:2:2805
-50:2:2806
-51:2:2814
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-53:2:2819
-54:2:2820
-55:2:2814
-56:2:2815
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-58:2:2820
-59:2:2828
-60:2:2833
-61:2:2840
-62:2:2841
-63:2:2848
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-70:2:2878
-71:0:4029
-72:2:2767
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-84:2:2917
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-86:2:2913
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-88:2:2922
-89:0:4029
-90:2:2767
-91:0:4029
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-119:2:3834
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-125:0:4029
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-128:0:4029
-129:2:2767
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-131:2:2940
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-159:2:3023
-160:2:3028
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-202:0:4029
-203:2:2767
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-218:2:3330
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-230:2:3368
-231:2:3375
-232:2:3376
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-235:2:3383
-236:0:4029
-237:2:2767
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-239:2:3394
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-241:2:3399
-242:2:3400
-243:2:3408
-244:2:3409
-245:2:3413
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-247:2:3422
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-250:2:3432
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-264:2:3479
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-269:2:3494
-270:2:3503
-271:0:4029
-272:2:2767
-273:0:4029
-274:1:2
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-276:1:8
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-278:1:9
-279:0:4029
-280:1:10
-281:0:4029
-282:1:11
-283:0:4029
-284:1:12
-285:1:13
-286:1:17
-287:1:18
-288:1:26
-289:1:27
-290:1:31
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-292:1:40
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-295:1:50
-296:1:58
-297:1:59
-298:1:63
-299:1:64
-300:1:58
-301:1:59
-302:1:63
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-304:1:72
-305:1:77
-306:1:84
-307:1:85
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-310:1:104
-311:1:105
-312:1:104
-313:1:105
-314:1:112
-315:0:4029
-316:1:11
-317:0:4029
-318:1:123
-319:1:124
-320:0:4029
-321:1:11
-322:0:4029
-323:1:130
-324:1:131
-325:1:135
-326:1:136
-327:1:144
-328:1:145
-329:1:149
-330:1:150
-331:1:158
-332:1:163
-333:1:167
-334:1:168
-335:1:176
-336:1:177
-337:1:181
-338:1:182
-339:1:176
-340:1:177
-341:1:181
-342:1:182
-343:1:190
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-345:1:202
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-348:1:215
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-350:1:223
-351:1:222
-352:1:223
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-354:0:4029
-355:1:11
-356:0:4029
-357:1:241
-358:1:242
-359:1:246
-360:1:247
-361:1:255
-362:1:256
-363:1:260
-364:1:261
-365:1:269
-366:1:274
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-369:1:287
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-373:1:287
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-379:1:313
-380:1:314
-381:1:321
-382:1:326
-383:1:333
-384:1:334
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-386:1:334
-387:1:341
-388:1:350
-389:0:4029
-390:1:11
-391:0:4029
-392:1:468
-393:1:472
-394:1:473
-395:1:477
-396:1:478
-397:1:486
-398:1:494
-399:1:495
-400:1:499
-401:1:503
-402:1:504
-403:1:499
-404:1:503
-405:1:504
-406:1:508
-407:1:515
-408:1:522
-409:1:523
-410:1:530
-411:1:535
-412:1:542
-413:1:543
-414:1:542
-415:1:543
-416:1:550
-417:0:4029
-418:1:11
-419:0:4029
-420:2:3507
-421:2:3516
-422:2:3517
-423:2:3521
-424:2:3522
-425:2:3526
-426:2:3527
-427:2:3535
-428:2:3540
-429:2:3544
-430:2:3545
-431:2:3553
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-435:2:3553
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-437:2:3558
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-448:2:3599
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-450:2:3607
-451:2:3617
-452:0:4029
-453:2:2767
-454:0:4029
-455:2:3623
-456:2:3632
-457:2:3633
-458:2:3637
-459:2:3638
-460:2:3642
-461:2:3643
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-463:2:3656
-464:2:3660
-465:2:3661
-466:2:3669
-467:2:3670
-468:2:3674
-469:2:3675
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-471:2:3670
-472:2:3674
-473:2:3675
-474:2:3683
-475:2:3690
-476:2:3691
-477:2:3695
-478:2:3696
-479:2:3703
-480:2:3708
-481:2:3715
-482:2:3716
-483:2:3715
-484:2:3716
-485:2:3723
-486:0:4029
-487:2:2767
-488:0:4029
-489:1:560
-490:1:561
-491:1:565
-492:1:566
-493:1:574
-494:1:575
-495:1:579
-496:1:580
-497:1:588
-498:1:593
-499:1:597
-500:1:598
-501:1:606
-502:1:607
-503:1:611
-504:1:612
-505:1:606
-506:1:607
-507:1:611
-508:1:612
-509:1:620
-510:1:625
-511:1:632
-512:1:633
-513:1:640
-514:1:645
-515:1:652
-516:1:653
-517:1:652
-518:1:653
-519:1:660
-520:0:4029
-521:1:11
-522:0:4029
-523:2:3507
-524:2:3516
-525:2:3517
-526:2:3521
-527:2:3522
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-1905:2:3683
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-1915:2:3716
-1916:2:3723
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-1919:0:4029
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-1931:1:2259
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-1944:1:2301
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-1949:1:2314
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--1:-1:-1
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-1952:1:11
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-1955:2:3516
-1956:2:3517
-1957:2:3521
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-1992:2:3637
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-2214:0:4029
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-2217:2:3633
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-4718:2:3703
-4719:2:3708
-4720:2:3715
-4721:2:3716
-4722:2:3715
-4723:2:3716
-4724:2:3723
-4725:0:4029
-4726:2:2767
-4727:0:4029
-4728:1:1784
-4729:1:1785
-4730:0:4029
-4731:1:11
-4732:0:4029
-4733:2:3507
-4734:2:3516
-4735:2:3517
-4736:2:3521
-4737:2:3522
-4738:2:3526
-4739:2:3527
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-4742:2:3544
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-4744:2:3553
-4745:2:3554
-4746:2:3558
-4747:2:3559
-4748:2:3553
-4749:2:3554
-4750:2:3558
-4751:2:3559
-4752:2:3567
-4753:2:3574
-4754:2:3575
-4755:2:3579
-4756:2:3580
-4757:2:3587
-4758:2:3592
-4759:2:3599
-4760:2:3600
-4761:2:3599
-4762:2:3600
-4763:2:3607
-4764:2:3617
-4765:0:4029
-4766:2:2767
-4767:0:4029
-4768:2:3623
-4769:2:3632
-4770:2:3633
-4771:2:3637
-4772:2:3638
-4773:2:3642
-4774:2:3643
-4775:2:3651
-4776:2:3656
-4777:2:3660
-4778:2:3661
-4779:2:3669
-4780:2:3670
-4781:2:3674
-4782:2:3675
-4783:2:3669
-4784:2:3670
-4785:2:3674
-4786:2:3675
-4787:2:3683
-4788:2:3690
-4789:2:3691
-4790:2:3695
-4791:2:3696
-4792:2:3703
-4793:2:3708
-4794:2:3715
-4795:2:3716
-4796:2:3715
-4797:2:3716
-4798:2:3723
-4799:0:4029
-4800:2:2767
-4801:0:4029
-4802:1:1791
-4803:1:1792
-4804:1:1796
-4805:1:1797
-4806:1:1805
-4807:1:1806
-4808:1:1807
-4809:1:1819
-4810:1:1824
-4811:1:1828
-4812:1:1829
-4813:1:1837
-4814:1:1838
-4815:1:1842
-4816:1:1843
-4817:1:1837
-4818:1:1838
-4819:1:1842
-4820:1:1843
-4821:1:1851
-4822:1:1856
-4823:1:1863
-4824:1:1864
-4825:1:1871
-4826:1:1876
-4827:1:1883
-4828:1:1884
-4829:1:1883
-4830:1:1884
-4831:1:1891
-4832:0:4029
-4833:1:11
-4834:0:4029
-4835:1:1902
-4836:1:1903
-4837:1:1907
-4838:1:1908
-4839:1:1916
-4840:1:1917
-4841:1:1921
-4842:1:1922
-4843:1:1930
-4844:1:1935
-4845:1:1939
-4846:1:1940
-4847:1:1948
-4848:1:1949
-4849:1:1953
-4850:1:1954
-4851:1:1948
-4852:1:1949
-4853:1:1953
-4854:1:1954
-4855:1:1962
-4856:1:1967
-4857:1:1974
-4858:1:1975
-4859:1:1982
-4860:1:1987
-4861:1:1994
-4862:1:1995
-4863:1:1994
-4864:1:1995
-4865:1:2002
-4866:1:2011
-4867:0:4029
-4868:1:11
-4869:0:4029
-4870:1:2129
-4871:1:2133
-4872:1:2134
-4873:1:2138
-4874:1:2139
-4875:1:2147
-4876:1:2155
-4877:1:2156
-4878:1:2160
-4879:1:2164
-4880:1:2165
-4881:1:2160
-4882:1:2164
-4883:1:2165
-4884:1:2169
-4885:1:2176
-4886:1:2183
-4887:1:2184
-4888:1:2191
-4889:1:2196
-4890:1:2203
-4891:1:2204
-4892:1:2203
-4893:1:2204
-4894:1:2211
-4895:0:4029
-4896:1:11
-4897:0:4029
-4898:2:3507
-4899:2:3516
-4900:2:3517
-4901:2:3521
-4902:2:3522
-4903:2:3526
-4904:2:3527
-4905:2:3535
-4906:2:3540
-4907:2:3544
-4908:2:3545
-4909:2:3553
-4910:2:3554
-4911:2:3558
-4912:2:3559
-4913:2:3553
-4914:2:3554
-4915:2:3558
-4916:2:3559
-4917:2:3567
-4918:2:3574
-4919:2:3575
-4920:2:3579
-4921:2:3580
-4922:2:3587
-4923:2:3592
-4924:2:3599
-4925:2:3600
-4926:2:3599
-4927:2:3600
-4928:2:3607
-4929:2:3617
-4930:0:4029
-4931:2:2767
-4932:0:4029
-4933:2:3623
-4934:2:3632
-4935:2:3633
-4936:2:3637
-4937:2:3638
-4938:2:3642
-4939:2:3643
-4940:2:3651
-4941:2:3656
-4942:2:3660
-4943:2:3661
-4944:2:3669
-4945:2:3670
-4946:2:3674
-4947:2:3675
-4948:2:3669
-4949:2:3670
-4950:2:3674
-4951:2:3675
-4952:2:3683
-4953:2:3690
-4954:2:3691
-4955:2:3695
-4956:2:3696
-4957:2:3703
-4958:2:3708
-4959:2:3715
-4960:2:3716
-4961:2:3715
-4962:2:3716
-4963:2:3723
-4964:0:4029
-4965:2:2767
-4966:0:4029
-4967:1:2221
-4968:1:2222
-4969:1:2226
-4970:1:2227
-4971:1:2235
-4972:1:2236
-4973:1:2240
-4974:1:2241
-4975:1:2249
-4976:1:2254
-4977:1:2258
-4978:1:2259
-4979:1:2267
-4980:1:2268
-4981:1:2272
-4982:1:2273
-4983:1:2267
-4984:1:2268
-4985:1:2272
-4986:1:2273
-4987:1:2281
-4988:1:2286
-4989:1:2293
-4990:1:2294
-4991:1:2301
-4992:1:2306
-4993:1:2313
-4994:1:2314
-4995:1:2313
-4996:1:2314
-4997:1:2321
+++ /dev/null
-
-// Poison value for freed memory
-#define POISON 1
-// Memory with correct data
-#define WINE 0
-#define SLAB_SIZE 2
-
-#define read_poison (data_read_first[0] == POISON || data_read_second[0] == POISON)
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-//disabled
-//#define REMOTE_BARRIERS
-
-#define ARCH_ALPHA
-//#define ARCH_INTEL
-//#define ARCH_POWERPC
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64 -DCOLLAPSE
-#CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory
- * and out-of-order instruction scheduling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-#define get_readerid() (get_pid())
-
-/*
- * Produced process control and data flow. Updated after each instruction to
- * show which variables are ready. Using one-hot bit encoding per variable to
- * save state space. Used as triggers to execute the instructions having those
- * variables as input. Leaving bits active to inhibit instruction execution.
- * Scheme used to make instruction disabling and automatic dependency fall-back
- * automatic.
- */
-
-#define CONSUME_TOKENS(state, bits, notbits) \
- ((!(state & (notbits))) && (state & (bits)) == (bits))
-
-#define PRODUCE_TOKENS(state, bits) \
- state = state | (bits);
-
-#define CLEAR_TOKENS(state, bits) \
- state = state & ~(bits)
-
-/*
- * Types of dependency :
- *
- * Data dependency
- *
- * - True dependency, Read-after-Write (RAW)
- *
- * This type of dependency happens when a statement depends on the result of a
- * previous statement. This applies to any statement which needs to read a
- * variable written by a preceding statement.
- *
- * - False dependency, Write-after-Read (WAR)
- *
- * Typically, variable renaming can ensure that this dependency goes away.
- * However, if the statements must read and then write from/to the same variable
- * in the OOO memory model, renaming may be impossible, and therefore this
- * causes a WAR dependency.
- *
- * - Output dependency, Write-after-Write (WAW)
- *
- * Two writes to the same variable in subsequent statements. Variable renaming
- * can ensure this is not needed, but can be required when writing multiple
- * times to the same OOO mem model variable.
- *
- * Control dependency
- *
- * Execution of a given instruction depends on a previous instruction evaluating
- * in a way that allows its execution. E.g. : branches.
- *
- * Useful considerations for joining dependencies after branch
- *
- * - Pre-dominance
- *
- * "We say box i dominates box j if every path (leading from input to output
- * through the diagram) which passes through box j must also pass through box
- * i. Thus box i dominates box j if box j is subordinate to box i in the
- * program."
- *
- * http://www.hipersoft.rice.edu/grads/publications/dom14.pdf
- * Other classic algorithm to calculate dominance : Lengauer-Tarjan (in gcc)
- *
- * - Post-dominance
- *
- * Just as pre-dominance, but with arcs of the data flow inverted, and input vs
- * output exchanged. Therefore, i post-dominating j ensures that every path
- * passing by j will pass by i before reaching the output.
- *
- * Prefetch and speculative execution
- *
- * If an instruction depends on the result of a previous branch, but it does not
- * have side-effects, it can be executed before the branch result is known.
- * however, it must be restarted if a core-synchronizing instruction is issued.
- * Note that instructions which depend on the speculative instruction result
- * but that have side-effects must depend on the branch completion in addition
- * to the speculatively executed instruction.
- *
- * Other considerations
- *
- * Note about "volatile" keyword dependency : The compiler will order volatile
- * accesses so they appear in the right order on a given CPU. They can be
- * reordered by the CPU instruction scheduling. This therefore cannot be
- * considered as a depencency.
- *
- * References :
- *
- * Cooper, Keith D.; & Torczon, Linda. (2005). Engineering a Compiler. Morgan
- * Kaufmann. ISBN 1-55860-698-X.
- * Kennedy, Ken; & Allen, Randy. (2001). Optimizing Compilers for Modern
- * Architectures: A Dependence-based Approach. Morgan Kaufmann. ISBN
- * 1-55860-286-0.
- * Muchnick, Steven S. (1997). Advanced Compiler Design and Implementation.
- * Morgan Kaufmann. ISBN 1-55860-320-4.
- */
-
-/*
- * Note about loops and nested calls
- *
- * To keep this model simple, loops expressed in the framework will behave as if
- * there was a core synchronizing instruction between loops. To see the effect
- * of loop unrolling, manually unrolling loops is required. Note that if loops
- * end or start with a core synchronizing instruction, the model is appropriate.
- * Nested calls are not supported.
- */
-
-/*
- * Only Alpha has out-of-order cache bank loads. Other architectures (intel,
- * powerpc, arm) ensure that dependent reads won't be reordered. c.f.
- * http://www.linuxjournal.com/article/8212)
- */
-#ifdef ARCH_ALPHA
-#define HAVE_OOO_CACHE_READ
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-typedef per_proc_bit {
- bit val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bitfield {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x;
-
-#define DECLARE_PROC_CACHED_VAR(type, x)\
- type cached_##x; \
- bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v) \
- mem_##x = v;
-
-#define INIT_PROC_CACHED_VAR(x, v) \
- cache_dirty_##x = 0; \
- cached_##x = v;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x)
-
-#define READ_CACHED_VAR(x) (cached_##x)
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x = v; \
- cache_dirty_##x = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x; \
- cache_dirty_##x = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x = mem_##x; \
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/* Must consume all prior read tokens. All subsequent reads depend on it. */
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Must consume all prior write tokens. All subsequent writes depend on it. */
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-}
-
-/* Synchronization point. Must consume all prior read and write tokens. All
- * subsequent reads and writes depend on it. */
-inline smp_mb(i)
-{
- atomic {
- smp_wmb(i);
- smp_rmb(i);
- }
-}
-
-#ifdef REMOTE_BARRIERS
-
-bit reader_barrier[NR_READERS];
-
-/*
- * We cannot leave the barriers dependencies in place in REMOTE_BARRIERS mode
- * because they would add unexisting core synchronization and would therefore
- * create an incomplete model.
- * Therefore, we model the read-side memory barriers by completely disabling the
- * memory barriers and their dependencies from the read-side. One at a time
- * (different verification runs), we make a different instruction listen for
- * signals.
- */
-
-#define smp_mb_reader(i, j)
-
-/*
- * Service 0, 1 or many barrier requests.
- */
-inline smp_mb_recv(i, j)
-{
- do
- :: (reader_barrier[get_readerid()] == 1) ->
- /*
- * We choose to ignore cycles caused by writer busy-looping,
- * waiting for the reader, sending barrier requests, and the
- * reader always services them without continuing execution.
- */
-progress_ignoring_mb1:
- smp_mb(i);
- reader_barrier[get_readerid()] = 0;
- :: 1 ->
- /*
- * We choose to ignore writer's non-progress caused by the
- * reader ignoring the writer's mb() requests.
- */
-progress_ignoring_mb2:
- break;
- od;
-}
-
-#define PROGRESS_LABEL(progressid) progress_writer_progid_##progressid:
-
-#define smp_mb_send(i, j, progressid) \
-{ \
- smp_mb(i); \
- i = 0; \
- do \
- :: i < NR_READERS -> \
- reader_barrier[i] = 1; \
- /* \
- * Busy-looping waiting for reader barrier handling is of little\
- * interest, given the reader has the ability to totally ignore \
- * barrier requests. \
- */ \
- do \
- :: (reader_barrier[i] == 1) -> \
-PROGRESS_LABEL(progressid) \
- skip; \
- :: (reader_barrier[i] == 0) -> break; \
- od; \
- i++; \
- :: i >= NR_READERS -> \
- break \
- od; \
- smp_mb(i); \
-}
-
-#else
-
-#define smp_mb_send(i, j, progressid) smp_mb(i)
-#define smp_mb_reader(i, j) smp_mb(i)
-#define smp_mb_recv(i, j)
-
-#endif
-
-/* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* RCU data */
-DECLARE_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
-/* RCU pointer */
-#if (SLAB_SIZE == 2)
-DECLARE_CACHED_VAR(bit, rcu_ptr);
-bit ptr_read_first[NR_READERS];
-bit ptr_read_second[NR_READERS];
-#else
-DECLARE_CACHED_VAR(byte, rcu_ptr);
-byte ptr_read_first[NR_READERS];
-byte ptr_read_second[NR_READERS];
-#endif
-
-bit data_read_first[NR_READERS];
-bit data_read_second[NR_READERS];
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_WRITE_TO_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#ifdef HAVE_OOO_CACHE_READ
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(rcu_ptr, get_pid());
- i = 0;
- do
- :: i < SLAB_SIZE ->
- RANDOM_CACHE_READ_FROM_MEM(rcu_data[i], get_pid());
- i++
- :: i >= SLAB_SIZE -> break
- od;
-#else
- smp_rmb(i);
-#endif /* HAVE_OOO_CACHE_READ */
- }
-}
-
-/*
- * Bit encoding, urcu_reader :
- */
-
-int _proc_urcu_reader;
-#define proc_urcu_reader _proc_urcu_reader
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROD_A_READ (1 << 0)
-#define READ_PROD_B_IF_TRUE (1 << 1)
-#define READ_PROD_B_IF_FALSE (1 << 2)
-#define READ_PROD_C_IF_TRUE_READ (1 << 3)
-
-#define PROCEDURE_READ_LOCK(base, consumetoken, consumetoken2, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, (consumetoken | consumetoken2), READ_PROD_A_READ << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_A_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- READ_PROD_A_READ << base, /* RAW, pre-dominant */ \
- (READ_PROD_B_IF_TRUE | READ_PROD_B_IF_FALSE) << base) -> \
- if \
- :: (!(tmp & RCU_GP_CTR_NEST_MASK)) -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_TRUE << base); \
- :: else -> \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_B_IF_FALSE << base); \
- fi; \
- /* IF TRUE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, consumetoken, /* prefetch */ \
- READ_PROD_C_IF_TRUE_READ << base) -> \
- ooo_mem(i); \
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_C_IF_TRUE_READ << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_TRUE \
- | READ_PROD_C_IF_TRUE_READ /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ELSE */ \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- (READ_PROD_B_IF_FALSE /* pre-dominant */ \
- | READ_PROD_A_READ) << base, /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], \
- tmp + 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- /* IF_MERGE implies \
- * post-dominance */ \
- /* ENDIF */ \
- skip
-
-/* Body of PROCEDURE_READ_LOCK */
-#define READ_PROC_READ_UNLOCK (1 << 0)
-
-#define PROCEDURE_READ_UNLOCK(base, consumetoken, producetoken) \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken, \
- READ_PROC_READ_UNLOCK << base) -> \
- ooo_mem(i); \
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]); \
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_UNLOCK << base); \
- :: CONSUME_TOKENS(proc_urcu_reader, \
- consumetoken \
- | (READ_PROC_READ_UNLOCK << base), /* WAR */ \
- producetoken) -> \
- ooo_mem(i); \
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp - 1); \
- PRODUCE_TOKENS(proc_urcu_reader, producetoken); \
- skip
-
-
-#define READ_PROD_NONE (1 << 0)
-
-/* PROCEDURE_READ_LOCK base = << 1 : 1 to 5 */
-#define READ_LOCK_BASE 1
-#define READ_LOCK_OUT (1 << 5)
-
-#define READ_PROC_FIRST_MB (1 << 6)
-
-/* PROCEDURE_READ_LOCK (NESTED) base : << 7 : 7 to 11 */
-#define READ_LOCK_NESTED_BASE 7
-#define READ_LOCK_NESTED_OUT (1 << 11)
-
-#define READ_PROC_READ_GEN (1 << 12)
-#define READ_PROC_ACCESS_GEN (1 << 13)
-
-/* PROCEDURE_READ_UNLOCK (NESTED) base = << 14 : 14 to 15 */
-#define READ_UNLOCK_NESTED_BASE 14
-#define READ_UNLOCK_NESTED_OUT (1 << 15)
-
-#define READ_PROC_SECOND_MB (1 << 16)
-
-/* PROCEDURE_READ_UNLOCK base = << 17 : 17 to 18 */
-#define READ_UNLOCK_BASE 17
-#define READ_UNLOCK_OUT (1 << 18)
-
-/* PROCEDURE_READ_LOCK_UNROLL base = << 19 : 19 to 23 */
-#define READ_LOCK_UNROLL_BASE 19
-#define READ_LOCK_OUT_UNROLL (1 << 23)
-
-#define READ_PROC_THIRD_MB (1 << 24)
-
-#define READ_PROC_READ_GEN_UNROLL (1 << 25)
-#define READ_PROC_ACCESS_GEN_UNROLL (1 << 26)
-
-#define READ_PROC_FOURTH_MB (1 << 27)
-
-/* PROCEDURE_READ_UNLOCK_UNROLL base = << 28 : 28 to 29 */
-#define READ_UNLOCK_UNROLL_BASE 28
-#define READ_UNLOCK_OUT_UNROLL (1 << 29)
-
-
-/* Should not include branches */
-#define READ_PROC_ALL_TOKENS (READ_PROD_NONE \
- | READ_LOCK_OUT \
- | READ_PROC_FIRST_MB \
- | READ_LOCK_NESTED_OUT \
- | READ_PROC_READ_GEN \
- | READ_PROC_ACCESS_GEN \
- | READ_UNLOCK_NESTED_OUT \
- | READ_PROC_SECOND_MB \
- | READ_UNLOCK_OUT \
- | READ_LOCK_OUT_UNROLL \
- | READ_PROC_THIRD_MB \
- | READ_PROC_READ_GEN_UNROLL \
- | READ_PROC_ACCESS_GEN_UNROLL \
- | READ_PROC_FOURTH_MB \
- | READ_UNLOCK_OUT_UNROLL)
-
-/* Must clear all tokens, including branches */
-#define READ_PROC_ALL_TOKENS_CLEAR ((1 << 30) - 1)
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROD_NONE);
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
-#ifdef REMOTE_BARRIERS
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-#endif
-
- do
- :: 1 ->
-
-#ifdef REMOTE_BARRIERS
- /*
- * Signal-based memory barrier will only execute when the
- * execution order appears in program order.
- */
- if
- :: 1 ->
- atomic {
- if
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE,
- READ_LOCK_OUT | READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT
- | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT | READ_LOCK_NESTED_OUT,
- READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN,
- READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT,
- READ_UNLOCK_OUT
- | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL,
- READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL,
- READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN
- | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL,
- READ_UNLOCK_OUT_UNROLL)
- || CONSUME_TOKENS(proc_urcu_reader, READ_PROD_NONE | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT | READ_PROC_READ_GEN | READ_PROC_ACCESS_GEN | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT | READ_LOCK_OUT_UNROLL
- | READ_PROC_READ_GEN_UNROLL | READ_PROC_ACCESS_GEN_UNROLL | READ_UNLOCK_OUT_UNROLL,
- 0) ->
- goto non_atomic3;
-non_atomic3_end:
- skip;
- fi;
- }
- fi;
-
- goto non_atomic3_skip;
-non_atomic3:
- smp_mb_recv(i, j);
- goto non_atomic3_end;
-non_atomic3_skip:
-
-#endif /* REMOTE_BARRIERS */
-
- atomic {
- if
- PROCEDURE_READ_LOCK(READ_LOCK_BASE, READ_PROD_NONE, 0, READ_LOCK_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_LOCK_OUT, /* post-dominant */
- READ_PROC_FIRST_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FIRST_MB);
-
- PROCEDURE_READ_LOCK(READ_LOCK_NESTED_BASE, READ_PROC_FIRST_MB, READ_LOCK_OUT,
- READ_LOCK_NESTED_OUT);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_PROC_READ_GEN) ->
- ooo_mem(i);
- ptr_read_first[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_READ_GEN,
- READ_PROC_ACCESS_GEN) ->
- /* smp_read_barrier_depends */
- goto rmb1;
-rmb1_end:
- data_read_first[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_first[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN);
-
-
- /* Note : we remove the nested memory barrier from the read unlock
- * model, given it is not usually needed. The implementation has the barrier
- * because the performance impact added by a branch in the common case does not
- * justify it.
- */
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_NESTED_BASE,
- READ_PROC_FIRST_MB
- | READ_LOCK_OUT
- | READ_LOCK_NESTED_OUT,
- READ_UNLOCK_NESTED_OUT);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_ACCESS_GEN /* mb() orders reads */
- | READ_PROC_READ_GEN /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_LOCK_OUT /* post-dominant */
- | READ_LOCK_NESTED_OUT /* post-dominant */
- | READ_UNLOCK_NESTED_OUT,
- READ_PROC_SECOND_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_SECOND_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT);
-
- /* Unrolling loop : second consecutive lock */
- /* reading urcu_active_readers, which have been written by
- * READ_UNLOCK_OUT : RAW */
- PROCEDURE_READ_LOCK(READ_LOCK_UNROLL_BASE,
- READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB, /* mb() orders reads */
- READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT /* RAW */
- | READ_UNLOCK_OUT, /* RAW */
- READ_LOCK_OUT_UNROLL);
-
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_THIRD_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_THIRD_MB);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_READ_GEN_UNROLL) ->
- ooo_mem(i);
- ptr_read_second[get_readerid()] = READ_CACHED_VAR(rcu_ptr);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_READ_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB, /* mb() orders reads */
- READ_PROC_ACCESS_GEN_UNROLL) ->
- /* smp_read_barrier_depends */
- goto rmb2;
-rmb2_end:
- data_read_second[get_readerid()] =
- READ_CACHED_VAR(rcu_data[ptr_read_second[get_readerid()]]);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_ACCESS_GEN_UNROLL);
-
- :: CONSUME_TOKENS(proc_urcu_reader,
- READ_PROC_READ_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_ACCESS_GEN_UNROLL /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() ordered */
- | READ_PROC_SECOND_MB /* mb() ordered */
- | READ_PROC_THIRD_MB /* mb() ordered */
- | READ_LOCK_OUT_UNROLL /* post-dominant */
- | READ_LOCK_NESTED_OUT
- | READ_LOCK_OUT
- | READ_UNLOCK_NESTED_OUT
- | READ_UNLOCK_OUT,
- READ_PROC_FOURTH_MB) ->
- smp_mb_reader(i, j);
- PRODUCE_TOKENS(proc_urcu_reader, READ_PROC_FOURTH_MB);
-
- PROCEDURE_READ_UNLOCK(READ_UNLOCK_UNROLL_BASE,
- READ_PROC_FOURTH_MB /* mb() orders reads */
- | READ_PROC_THIRD_MB /* mb() orders reads */
- | READ_LOCK_OUT_UNROLL /* RAW */
- | READ_PROC_SECOND_MB /* mb() orders reads */
- | READ_PROC_FIRST_MB /* mb() orders reads */
- | READ_LOCK_NESTED_OUT /* RAW */
- | READ_LOCK_OUT /* RAW */
- | READ_UNLOCK_NESTED_OUT, /* RAW */
- READ_UNLOCK_OUT_UNROLL);
- :: CONSUME_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_reader, READ_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Dependency between consecutive loops :
- * RAW dependency on
- * WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1)
- * tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- * between loops.
- * _WHEN THE MB()s are in place_, they add full ordering of the
- * generation pointer read wrt active reader count read, which ensures
- * execution will not spill across loop execution.
- * However, in the event mb()s are removed (execution using signal
- * handler to promote barrier()() -> smp_mb()), nothing prevents one loop
- * to spill its execution on other loop's execution.
- */
- goto end;
-rmb1:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb1_end;
-rmb2:
-#ifndef NO_RMB
- smp_rmb(i);
-#else
- ooo_mem(i);
-#endif
- goto rmb2_end;
-end:
- skip;
-}
-
-
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* no name clash please */
-#undef proc_urcu_reader
-
-
-/* Model the RCU update process. */
-
-/*
- * Bit encoding, urcu_writer :
- * Currently only supports one reader.
- */
-
-int _proc_urcu_writer;
-#define proc_urcu_writer _proc_urcu_writer
-
-#define WRITE_PROD_NONE (1 << 0)
-
-#define WRITE_DATA (1 << 1)
-#define WRITE_PROC_WMB (1 << 2)
-#define WRITE_XCHG_PTR (1 << 3)
-
-#define WRITE_PROC_FIRST_MB (1 << 4)
-
-/* first flip */
-#define WRITE_PROC_FIRST_READ_GP (1 << 5)
-#define WRITE_PROC_FIRST_WRITE_GP (1 << 6)
-#define WRITE_PROC_FIRST_WAIT (1 << 7)
-#define WRITE_PROC_FIRST_WAIT_LOOP (1 << 8)
-
-/* second flip */
-#define WRITE_PROC_SECOND_READ_GP (1 << 9)
-#define WRITE_PROC_SECOND_WRITE_GP (1 << 10)
-#define WRITE_PROC_SECOND_WAIT (1 << 11)
-#define WRITE_PROC_SECOND_WAIT_LOOP (1 << 12)
-
-#define WRITE_PROC_SECOND_MB (1 << 13)
-
-#define WRITE_FREE (1 << 14)
-
-#define WRITE_PROC_ALL_TOKENS (WRITE_PROD_NONE \
- | WRITE_DATA \
- | WRITE_PROC_WMB \
- | WRITE_XCHG_PTR \
- | WRITE_PROC_FIRST_MB \
- | WRITE_PROC_FIRST_READ_GP \
- | WRITE_PROC_FIRST_WRITE_GP \
- | WRITE_PROC_FIRST_WAIT \
- | WRITE_PROC_SECOND_READ_GP \
- | WRITE_PROC_SECOND_WRITE_GP \
- | WRITE_PROC_SECOND_WAIT \
- | WRITE_PROC_SECOND_MB \
- | WRITE_FREE)
-
-#define WRITE_PROC_ALL_TOKENS_CLEAR ((1 << 15) - 1)
-
-/*
- * Mutexes are implied around writer execution. A single writer at a time.
- */
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2, tmpa;
- byte cur_data = 0, old_data, loop_nr = 0;
- byte cur_gp_val = 0; /*
- * Keep a local trace of the current parity so
- * we don't add non-existing dependencies on the global
- * GP update. Needed to test single flip case.
- */
-
- /* Keep in sync manually with smp_rmb, smp_wmb, ooo_mem and init() */
- DECLARE_PROC_CACHED_VAR(byte, urcu_gp_ctr);
- /* Note ! currently only one reader */
- DECLARE_PROC_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
- /* RCU data */
- DECLARE_PROC_CACHED_VAR(bit, rcu_data[SLAB_SIZE]);
-
- /* RCU pointer */
-#if (SLAB_SIZE == 2)
- DECLARE_PROC_CACHED_VAR(bit, rcu_ptr);
-#else
- DECLARE_PROC_CACHED_VAR(byte, rcu_ptr);
-#endif
-
- atomic {
- INIT_PROC_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_PROC_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_PROC_CACHED_VAR(urcu_active_readers[i], 0);
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_PROC_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_PROC_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
- }
-
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (loop_nr < 3) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- loop_nr = loop_nr + 1;
-
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROD_NONE);
-
-#ifdef NO_WMB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-#endif
-
-#ifdef NO_MB
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-#endif
-
-#ifdef SINGLE_FLIP
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- /* For single flip, we need to know the current parity */
- cur_gp_val = cur_gp_val ^ RCU_GP_CTR_BIT;
-#endif
-
- do :: 1 ->
- atomic {
- if
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROD_NONE,
- WRITE_DATA) ->
- ooo_mem(i);
- cur_data = (cur_data + 1) % SLAB_SIZE;
- WRITE_CACHED_VAR(rcu_data[cur_data], WINE);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_DATA);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA,
- WRITE_PROC_WMB) ->
- smp_wmb(i);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_WMB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_WMB,
- WRITE_XCHG_PTR) ->
- /* rcu_xchg_pointer() */
- atomic {
- old_data = READ_CACHED_VAR(rcu_ptr);
- WRITE_CACHED_VAR(rcu_ptr, cur_data);
- }
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_XCHG_PTR);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR,
- WRITE_PROC_FIRST_MB) ->
- goto smp_mb_send1;
-smp_mb_send1_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_MB);
-
- /* first flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB,
- WRITE_PROC_FIRST_READ_GP) ->
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_MB | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP,
- WRITE_PROC_FIRST_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_FIRST_WAIT | WRITE_PROC_FIRST_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
-#ifndef SINGLE_FLIP
- /* In normal execution, we are always starting by
- * waiting for the even parity.
- */
- cur_gp_val = RCU_GP_CTR_BIT;
-#endif
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ cur_gp_val) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send2;
-smp_mb_send2_end:
- /* The memory barrier will invalidate the
- * second read done as prefetching. Note that all
- * instructions with side-effects depending on
- * WRITE_PROC_SECOND_READ_GP should also depend on
- * completion of this busy-waiting loop. */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_FIRST_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_FIRST_WAIT_LOOP | WRITE_PROC_FIRST_WAIT);
-
- /* second flip */
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WAIT | //test /* no dependency. Could pre-fetch, no side-effect. */
- WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_READ_GP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- tmpa = READ_CACHED_VAR(urcu_gp_ctr);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_READ_GP);
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT /* dependency on first wait, because this
- * instruction has globally observable
- * side-effects.
- */
- | WRITE_PROC_FIRST_MB
- | WRITE_PROC_WMB
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP,
- WRITE_PROC_SECOND_WRITE_GP) ->
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmpa ^ RCU_GP_CTR_BIT);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WRITE_GP);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- WRITE_PROC_SECOND_WAIT | WRITE_PROC_SECOND_WAIT_LOOP) ->
- ooo_mem(i);
- //smp_mb(i); /* TEST */
- /* ONLY WAITING FOR READER 0 */
- tmp2 = READ_CACHED_VAR(urcu_active_readers[0]);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ 0) & RCU_GP_CTR_BIT) ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP);
- :: else ->
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT);
- fi;
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- //WRITE_PROC_FIRST_WRITE_GP | /* TEST ADDING SYNC CORE */
- WRITE_PROC_SECOND_WRITE_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_WAIT_LOOP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB, /* can be reordered before/after flips */
- 0) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- goto smp_mb_send3;
-smp_mb_send3_end:
-#else
- ooo_mem(i);
-#endif
- /* This instruction loops to WRITE_PROC_SECOND_WAIT */
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_WAIT_LOOP | WRITE_PROC_SECOND_WAIT);
-
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_FIRST_READ_GP
- | WRITE_PROC_SECOND_READ_GP
- | WRITE_PROC_FIRST_WRITE_GP
- | WRITE_PROC_SECOND_WRITE_GP
- | WRITE_DATA | WRITE_PROC_WMB | WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_MB,
- WRITE_PROC_SECOND_MB) ->
- goto smp_mb_send4;
-smp_mb_send4_end:
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_PROC_SECOND_MB);
-
- :: CONSUME_TOKENS(proc_urcu_writer,
- WRITE_XCHG_PTR
- | WRITE_PROC_FIRST_WAIT
- | WRITE_PROC_SECOND_WAIT
- | WRITE_PROC_WMB /* No dependency on
- * WRITE_DATA because we
- * write to a
- * different location. */
- | WRITE_PROC_SECOND_MB
- | WRITE_PROC_FIRST_MB,
- WRITE_FREE) ->
- WRITE_CACHED_VAR(rcu_data[old_data], POISON);
- PRODUCE_TOKENS(proc_urcu_writer, WRITE_FREE);
-
- :: CONSUME_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS, 0) ->
- CLEAR_TOKENS(proc_urcu_writer, WRITE_PROC_ALL_TOKENS_CLEAR);
- break;
- fi;
- }
- od;
- /*
- * Note : Promela model adds implicit serialization of the
- * WRITE_FREE instruction. Normally, it would be permitted to
- * spill on the next loop execution. Given the validation we do
- * checks for the data entry read to be poisoned, it's ok if
- * we do not check "late arriving" memory poisoning.
- */
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
-#ifdef READER_PROGRESS
- /*
- * Make sure we don't block the reader's progress.
- */
- smp_mb_send(i, j, 5);
-#endif
- skip;
- od;
-
- /* Non-atomic parts of the loop */
- goto end;
-smp_mb_send1:
- smp_mb_send(i, j, 1);
- goto smp_mb_send1_end;
-#ifndef GEN_ERROR_WRITER_PROGRESS
-smp_mb_send2:
- smp_mb_send(i, j, 2);
- goto smp_mb_send2_end;
-smp_mb_send3:
- smp_mb_send(i, j, 3);
- goto smp_mb_send3_end;
-#endif
-smp_mb_send4:
- smp_mb_send(i, j, 4);
- goto smp_mb_send4_end;
-end:
- skip;
-}
-
-/* no name clash please */
-#undef proc_urcu_writer
-
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1);
- INIT_CACHED_VAR(rcu_ptr, 0);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0);
- ptr_read_first[i] = 1;
- ptr_read_second[i] = 1;
- data_read_first[i] = WINE;
- data_read_second[i] = WINE;
- i++;
- :: i >= NR_READERS -> break
- od;
- INIT_CACHED_VAR(rcu_data[0], WINE);
- i = 1;
- do
- :: i < SLAB_SIZE ->
- INIT_CACHED_VAR(rcu_data[i], POISON);
- i++
- :: i >= SLAB_SIZE -> break
- od;
-
- init_done = 1;
- }
-}
+++ /dev/null
-[] (!read_poison)
+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-#define NO_MB
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 4926 States= 1e+06 Transitions= 9.03e+06 Memory= 527.287 t= 5.98 R= 2e+05
-Depth= 7228 States= 2e+06 Transitions= 1.88e+07 Memory= 588.322 t= 12.9 R= 2e+05
-Depth= 7228 States= 3e+06 Transitions= 3.14e+07 Memory= 649.358 t= 21.9 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 7228 States= 4e+06 Transitions= 4.3e+07 Memory= 741.416 t= 30.3 R= 1e+05
-Depth= 7228 States= 5e+06 Transitions= 5.65e+07 Memory= 802.451 t= 39.6 R= 1e+05
-Depth= 7228 States= 6e+06 Transitions= 6.78e+07 Memory= 863.486 t= 47.5 R= 1e+05
-Depth= 7228 States= 7e+06 Transitions= 8.05e+07 Memory= 924.522 t= 56.5 R= 1e+05
-Depth= 7228 States= 8e+06 Transitions= 9.49e+07 Memory= 985.557 t= 66.8 R= 1e+05
-Depth= 7228 States= 9e+06 Transitions= 1.06e+08 Memory= 1046.592 t= 74.7 R= 1e+05
-pan: resizing hashtable to -w24.. done
-Depth= 7228 States= 1e+07 Transitions= 1.18e+08 Memory= 1231.721 t= 84.9 R= 1e+05
-Depth= 7228 States= 1.1e+07 Transitions= 1.29e+08 Memory= 1292.756 t= 92.8 R= 1e+05
-Depth= 7228 States= 1.2e+07 Transitions= 1.4e+08 Memory= 1353.791 t= 100 R= 1e+05
-Depth= 7228 States= 1.3e+07 Transitions= 1.53e+08 Memory= 1414.826 t= 109 R= 1e+05
-Depth= 7228 States= 1.4e+07 Transitions= 1.65e+08 Memory= 1475.861 t= 117 R= 1e+05
-Depth= 7228 States= 1.5e+07 Transitions= 1.77e+08 Memory= 1536.897 t= 126 R= 1e+05
-Depth= 7228 States= 1.6e+07 Transitions= 1.89e+08 Memory= 1597.932 t= 134 R= 1e+05
-Depth= 7228 States= 1.7e+07 Transitions= 2.02e+08 Memory= 1658.967 t= 143 R= 1e+05
-Depth= 7228 States= 1.8e+07 Transitions= 2.16e+08 Memory= 1720.002 t= 153 R= 1e+05
-Depth= 7228 States= 1.9e+07 Transitions= 2.27e+08 Memory= 1781.037 t= 160 R= 1e+05
-Depth= 7228 States= 2e+07 Transitions= 2.39e+08 Memory= 1842.072 t= 169 R= 1e+05
-Depth= 7228 States= 2.1e+07 Transitions= 2.51e+08 Memory= 1903.108 t= 177 R= 1e+05
-Depth= 7228 States= 2.2e+07 Transitions= 2.62e+08 Memory= 1964.143 t= 185 R= 1e+05
-Depth= 7228 States= 2.3e+07 Transitions= 2.74e+08 Memory= 2025.178 t= 194 R= 1e+05
-Depth= 7228 States= 2.4e+07 Transitions= 2.86e+08 Memory= 2086.213 t= 203 R= 1e+05
-Depth= 7228 States= 2.5e+07 Transitions= 2.99e+08 Memory= 2147.248 t= 212 R= 1e+05
-Depth= 7228 States= 2.6e+07 Transitions= 3.1e+08 Memory= 2208.283 t= 220 R= 1e+05
-Depth= 7228 States= 2.7e+07 Transitions= 3.24e+08 Memory= 2269.318 t= 230 R= 1e+05
-Depth= 7228 States= 2.8e+07 Transitions= 3.37e+08 Memory= 2330.354 t= 239 R= 1e+05
-Depth= 7228 States= 2.9e+07 Transitions= 3.49e+08 Memory= 2391.389 t= 248 R= 1e+05
-Depth= 7228 States= 3e+07 Transitions= 3.6e+08 Memory= 2452.424 t= 256 R= 1e+05
-Depth= 7228 States= 3.1e+07 Transitions= 3.72e+08 Memory= 2513.459 t= 265 R= 1e+05
-Depth= 7228 States= 3.2e+07 Transitions= 3.83e+08 Memory= 2574.494 t= 273 R= 1e+05
-Depth= 7228 States= 3.3e+07 Transitions= 3.95e+08 Memory= 2635.529 t= 282 R= 1e+05
-Depth= 7228 States= 3.4e+07 Transitions= 4.07e+08 Memory= 2696.565 t= 291 R= 1e+05
-pan: resizing hashtable to -w26.. done
-Depth= 7228 States= 3.5e+07 Transitions= 4.2e+08 Memory= 3253.682 t= 308 R= 1e+05
-Depth= 7228 States= 3.6e+07 Transitions= 4.32e+08 Memory= 3314.717 t= 316 R= 1e+05
-Depth= 7228 States= 3.7e+07 Transitions= 4.45e+08 Memory= 3375.752 t= 325 R= 1e+05
-Depth= 7228 States= 3.8e+07 Transitions= 4.58e+08 Memory= 3436.787 t= 334 R= 1e+05
-Depth= 7228 States= 3.9e+07 Transitions= 4.71e+08 Memory= 3497.822 t= 343 R= 1e+05
-Depth= 7228 States= 4e+07 Transitions= 4.82e+08 Memory= 3558.858 t= 350 R= 1e+05
-Depth= 7228 States= 4.1e+07 Transitions= 4.94e+08 Memory= 3619.893 t= 359 R= 1e+05
-Depth= 7228 States= 4.2e+07 Transitions= 5.04e+08 Memory= 3680.928 t= 366 R= 1e+05
-Depth= 7228 States= 4.3e+07 Transitions= 5.16e+08 Memory= 3741.963 t= 374 R= 1e+05
-Depth= 7228 States= 4.4e+07 Transitions= 5.29e+08 Memory= 3802.998 t= 383 R= 1e+05
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 56 byte, depth reached 7228, errors: 0
- 44157204 states, stored
-4.8641845e+08 states, matched
-5.3057565e+08 transitions (= stored+matched)
-1.8453582e+09 atomic steps
-hash conflicts: 2.8837553e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3537.374 equivalent memory usage for states (stored*(State-vector + overhead))
- 2843.050 actual memory usage for states (compression: 80.37%)
- state-vector as stored = 40 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 3812.568 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, ".input.spin", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 61, "(1)"
- line 417, ".input.spin", state 91, "(1)"
- line 398, ".input.spin", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 158, "(1)"
- line 417, ".input.spin", state 188, "(1)"
- line 398, ".input.spin", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 256, "(1)"
- line 417, ".input.spin", state 286, "(1)"
- line 398, ".input.spin", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 395, "(1)"
- line 417, ".input.spin", state 425, "(1)"
- line 539, ".input.spin", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 398, ".input.spin", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 70, "(1)"
- line 417, ".input.spin", state 100, "(1)"
- line 398, ".input.spin", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 158, "(1)"
- line 417, ".input.spin", state 188, "(1)"
- line 398, ".input.spin", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 247, "(1)"
- line 417, ".input.spin", state 277, "(1)"
- line 398, ".input.spin", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 359, "(1)"
- line 417, ".input.spin", state 389, "(1)"
- line 613, ".input.spin", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 398, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 59, "(1)"
- line 412, ".input.spin", state 72, "(1)"
- line 417, ".input.spin", state 89, "(1)"
- line 398, ".input.spin", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 153, "(1)"
- line 412, ".input.spin", state 166, "(1)"
- line 651, ".input.spin", state 199, "(1)"
- line 174, ".input.spin", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 240, "(1)"
- line 163, ".input.spin", state 248, "(1)"
- line 167, ".input.spin", state 260, "(1)"
- line 174, ".input.spin", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 303, "(1)"
- line 163, ".input.spin", state 311, "(1)"
- line 167, ".input.spin", state 323, "(1)"
- line 174, ".input.spin", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 370, "(1)"
- line 163, ".input.spin", state 378, "(1)"
- line 167, ".input.spin", state 390, "(1)"
- line 398, ".input.spin", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 449, "(1)"
- line 412, ".input.spin", state 462, "(1)"
- line 417, ".input.spin", state 479, "(1)"
- line 398, ".input.spin", state 498, "(1)"
- line 402, ".input.spin", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 554, "(1)"
- line 417, ".input.spin", state 571, "(1)"
- line 402, ".input.spin", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 647, "(1)"
- line 417, ".input.spin", state 664, "(1)"
- line 178, ".input.spin", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 710, "(1)"
- line 163, ".input.spin", state 718, "(1)"
- line 167, ".input.spin", state 730, "(1)"
- line 174, ".input.spin", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 773, "(1)"
- line 163, ".input.spin", state 781, "(1)"
- line 167, ".input.spin", state 793, "(1)"
- line 174, ".input.spin", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 840, "(1)"
- line 163, ".input.spin", state 848, "(1)"
- line 167, ".input.spin", state 860, "(1)"
- line 398, ".input.spin", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 884, "(1)"
- line 398, ".input.spin", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 885, "else"
- line 398, ".input.spin", state 888, "(1)"
- line 402, ".input.spin", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 898, "(1)"
- line 402, ".input.spin", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 899, "else"
- line 402, ".input.spin", state 902, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 400, ".input.spin", state 908, "((i<1))"
- line 400, ".input.spin", state 908, "((i>=1))"
- line 407, ".input.spin", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 927, "(1)"
- line 408, ".input.spin", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, ".input.spin", state 928, "else"
- line 408, ".input.spin", state 931, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 412, ".input.spin", state 940, "(1)"
- line 412, ".input.spin", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, ".input.spin", state 941, "else"
- line 412, ".input.spin", state 944, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 410, ".input.spin", state 950, "((i<1))"
- line 410, ".input.spin", state 950, "((i>=1))"
- line 417, ".input.spin", state 957, "(1)"
- line 417, ".input.spin", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, ".input.spin", state 958, "else"
- line 417, ".input.spin", state 961, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 402, ".input.spin", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1040, "(1)"
- line 417, ".input.spin", state 1057, "(1)"
- line 402, ".input.spin", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1130, "(1)"
- line 417, ".input.spin", state 1147, "(1)"
- line 398, ".input.spin", state 1166, "(1)"
- line 402, ".input.spin", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1222, "(1)"
- line 417, ".input.spin", state 1239, "(1)"
- line 402, ".input.spin", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1315, "(1)"
- line 417, ".input.spin", state 1332, "(1)"
- line 178, ".input.spin", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1378, "(1)"
- line 163, ".input.spin", state 1386, "(1)"
- line 167, ".input.spin", state 1398, "(1)"
- line 174, ".input.spin", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1441, "(1)"
- line 163, ".input.spin", state 1449, "(1)"
- line 167, ".input.spin", state 1461, "(1)"
- line 174, ".input.spin", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1508, "(1)"
- line 163, ".input.spin", state 1516, "(1)"
- line 167, ".input.spin", state 1528, "(1)"
- line 398, ".input.spin", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 1552, "(1)"
- line 398, ".input.spin", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 1553, "else"
- line 398, ".input.spin", state 1556, "(1)"
- line 402, ".input.spin", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 1566, "(1)"
- line 402, ".input.spin", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 1567, "else"
- line 402, ".input.spin", state 1570, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 400, ".input.spin", state 1576, "((i<1))"
- line 400, ".input.spin", state 1576, "((i>=1))"
- line 407, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 1595, "(1)"
- line 408, ".input.spin", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, ".input.spin", state 1596, "else"
- line 408, ".input.spin", state 1599, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 412, ".input.spin", state 1608, "(1)"
- line 412, ".input.spin", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, ".input.spin", state 1609, "else"
- line 412, ".input.spin", state 1612, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 410, ".input.spin", state 1618, "((i<1))"
- line 410, ".input.spin", state 1618, "((i>=1))"
- line 417, ".input.spin", state 1625, "(1)"
- line 417, ".input.spin", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, ".input.spin", state 1626, "else"
- line 417, ".input.spin", state 1629, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 178, ".input.spin", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1681, "(1)"
- line 163, ".input.spin", state 1689, "(1)"
- line 167, ".input.spin", state 1701, "(1)"
- line 174, ".input.spin", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1744, "(1)"
- line 163, ".input.spin", state 1752, "(1)"
- line 167, ".input.spin", state 1764, "(1)"
- line 174, ".input.spin", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1811, "(1)"
- line 163, ".input.spin", state 1819, "(1)"
- line 167, ".input.spin", state 1831, "(1)"
- line 701, ".input.spin", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 384 seconds
-pan: rate 114968.77 states/second
-pan: avg transition delay 7.2389e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-Depth= 6837 States= 1e+06 Transitions= 9.03e+06 Memory= 534.904 t= 7.74 R= 1e+05
-Depth= 8887 States= 2e+06 Transitions= 1.88e+07 Memory= 603.557 t= 16.6 R= 1e+05
-Depth= 8887 States= 3e+06 Transitions= 3.14e+07 Memory= 672.209 t= 28 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 8887 States= 4e+06 Transitions= 4.33e+07 Memory= 771.885 t= 39.1 R= 1e+05
-Depth= 8887 States= 5e+06 Transitions= 5.65e+07 Memory= 840.635 t= 50.7 R= 1e+05
-Depth= 8887 States= 6e+06 Transitions= 6.79e+07 Memory= 909.287 t= 61 R= 1e+05
-Depth= 8887 States= 7e+06 Transitions= 8.08e+07 Memory= 977.940 t= 72.6 R= 1e+05
-Depth= 8887 States= 8e+06 Transitions= 9.5e+07 Memory= 1046.592 t= 85.5 R= 9e+04
-Depth= 8887 States= 9e+06 Transitions= 1.07e+08 Memory= 1115.342 t= 96.7 R= 9e+04
-pan: resizing hashtable to -w24.. done
-Depth= 8887 States= 1e+07 Transitions= 1.18e+08 Memory= 1308.088 t= 108 R= 9e+04
-Depth= 8887 States= 1.1e+07 Transitions= 1.3e+08 Memory= 1376.740 t= 119 R= 9e+04
-Depth= 8887 States= 1.2e+07 Transitions= 1.41e+08 Memory= 1445.393 t= 128 R= 9e+04
-Depth= 8887 States= 1.3e+07 Transitions= 1.51e+08 Memory= 1514.045 t= 138 R= 9e+04
-Depth= 8887 States= 1.4e+07 Transitions= 1.64e+08 Memory= 1582.795 t= 149 R= 9e+04
-Depth= 8887 States= 1.5e+07 Transitions= 1.77e+08 Memory= 1651.447 t= 160 R= 9e+04
-Depth= 8887 States= 1.6e+07 Transitions= 1.9e+08 Memory= 1720.100 t= 172 R= 9e+04
-Depth= 8887 States= 1.7e+07 Transitions= 2.02e+08 Memory= 1788.752 t= 183 R= 9e+04
-Depth= 8887 States= 1.8e+07 Transitions= 2.15e+08 Memory= 1857.502 t= 194 R= 9e+04
-Depth= 8887 States= 1.9e+07 Transitions= 2.29e+08 Memory= 1926.154 t= 207 R= 9e+04
-Depth= 8887 States= 2e+07 Transitions= 2.4e+08 Memory= 1994.807 t= 217 R= 9e+04
-Depth= 8887 States= 2.1e+07 Transitions= 2.51e+08 Memory= 2063.459 t= 227 R= 9e+04
-Depth= 8887 States= 2.2e+07 Transitions= 2.63e+08 Memory= 2132.209 t= 238 R= 9e+04
-Depth= 8887 States= 2.3e+07 Transitions= 2.74e+08 Memory= 2200.861 t= 248 R= 9e+04
-Depth= 8887 States= 2.4e+07 Transitions= 2.86e+08 Memory= 2269.514 t= 259 R= 9e+04
-Depth= 8887 States= 2.5e+07 Transitions= 2.98e+08 Memory= 2338.166 t= 270 R= 9e+04
-Depth= 8887 States= 2.6e+07 Transitions= 3.1e+08 Memory= 2406.916 t= 281 R= 9e+04
-Depth= 8887 States= 2.7e+07 Transitions= 3.24e+08 Memory= 2475.568 t= 294 R= 9e+04
-Depth= 8887 States= 2.8e+07 Transitions= 3.36e+08 Memory= 2544.221 t= 305 R= 9e+04
-Depth= 8887 States= 2.9e+07 Transitions= 3.49e+08 Memory= 2612.873 t= 317 R= 9e+04
-Depth= 8887 States= 3e+07 Transitions= 3.63e+08 Memory= 2681.526 t= 329 R= 9e+04
-Depth= 8887 States= 3.1e+07 Transitions= 3.73e+08 Memory= 2750.276 t= 339 R= 9e+04
-Depth= 8887 States= 3.2e+07 Transitions= 3.85e+08 Memory= 2818.928 t= 351 R= 9e+04
-Depth= 8887 States= 3.3e+07 Transitions= 3.97e+08 Memory= 2887.580 t= 362 R= 9e+04
-Depth= 8887 States= 3.4e+07 Transitions= 4.08e+08 Memory= 2956.233 t= 373 R= 9e+04
-pan: resizing hashtable to -w26.. done
-Depth= 8887 States= 3.5e+07 Transitions= 4.2e+08 Memory= 3520.967 t= 391 R= 9e+04
-Depth= 8887 States= 3.6e+07 Transitions= 4.32e+08 Memory= 3589.619 t= 402 R= 9e+04
-Depth= 8887 States= 3.7e+07 Transitions= 4.44e+08 Memory= 3658.272 t= 413 R= 9e+04
-Depth= 8887 States= 3.8e+07 Transitions= 4.58e+08 Memory= 3727.022 t= 425 R= 9e+04
-Depth= 8887 States= 3.9e+07 Transitions= 4.7e+08 Memory= 3795.674 t= 435 R= 9e+04
-Depth= 8887 States= 4e+07 Transitions= 4.83e+08 Memory= 3864.326 t= 447 R= 9e+04
-Depth= 8887 States= 4.1e+07 Transitions= 4.97e+08 Memory= 3932.979 t= 459 R= 9e+04
-Depth= 8887 States= 4.2e+07 Transitions= 5.07e+08 Memory= 4001.729 t= 468 R= 9e+04
-Depth= 8887 States= 4.3e+07 Transitions= 5.19e+08 Memory= 4070.381 t= 479 R= 9e+04
-Depth= 8887 States= 4.4e+07 Transitions= 5.31e+08 Memory= 4139.033 t= 489 R= 9e+04
-Depth= 8887 States= 4.5e+07 Transitions= 5.42e+08 Memory= 4207.686 t= 499 R= 9e+04
-Depth= 8887 States= 4.6e+07 Transitions= 5.54e+08 Memory= 4276.338 t= 510 R= 9e+04
-Depth= 8887 States= 4.7e+07 Transitions= 5.67e+08 Memory= 4345.088 t= 521 R= 9e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 8887, errors: 0
- 47143033 states, stored
-5.2129161e+08 states, matched
-5.6843464e+08 transitions (= stored+matched)
-1.9783052e+09 atomic steps
-hash conflicts: 3.1395137e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4136.237 equivalent memory usage for states (stored*(State-vector + overhead))
- 3385.741 actual memory usage for states (compression: 81.86%)
- state-vector as stored = 47 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 4354.854 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 61, "(1)"
- line 417, "pan.___", state 91, "(1)"
- line 398, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 158, "(1)"
- line 417, "pan.___", state 188, "(1)"
- line 398, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 256, "(1)"
- line 417, "pan.___", state 286, "(1)"
- line 398, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 395, "(1)"
- line 417, "pan.___", state 425, "(1)"
- line 539, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 398, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 70, "(1)"
- line 417, "pan.___", state 100, "(1)"
- line 398, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 158, "(1)"
- line 417, "pan.___", state 188, "(1)"
- line 398, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 247, "(1)"
- line 417, "pan.___", state 277, "(1)"
- line 398, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 359, "(1)"
- line 417, "pan.___", state 389, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 59, "(1)"
- line 412, "pan.___", state 72, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 153, "(1)"
- line 412, "pan.___", state 166, "(1)"
- line 651, "pan.___", state 199, "(1)"
- line 174, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 240, "(1)"
- line 163, "pan.___", state 248, "(1)"
- line 167, "pan.___", state 260, "(1)"
- line 174, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 303, "(1)"
- line 163, "pan.___", state 311, "(1)"
- line 167, "pan.___", state 323, "(1)"
- line 174, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 370, "(1)"
- line 163, "pan.___", state 378, "(1)"
- line 167, "pan.___", state 390, "(1)"
- line 398, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 449, "(1)"
- line 412, "pan.___", state 462, "(1)"
- line 417, "pan.___", state 479, "(1)"
- line 398, "pan.___", state 498, "(1)"
- line 402, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 554, "(1)"
- line 417, "pan.___", state 571, "(1)"
- line 402, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 647, "(1)"
- line 417, "pan.___", state 664, "(1)"
- line 178, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 710, "(1)"
- line 163, "pan.___", state 718, "(1)"
- line 167, "pan.___", state 730, "(1)"
- line 174, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 773, "(1)"
- line 163, "pan.___", state 781, "(1)"
- line 167, "pan.___", state 793, "(1)"
- line 174, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 840, "(1)"
- line 163, "pan.___", state 848, "(1)"
- line 167, "pan.___", state 860, "(1)"
- line 398, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 884, "(1)"
- line 398, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 885, "else"
- line 398, "pan.___", state 888, "(1)"
- line 402, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 899, "else"
- line 402, "pan.___", state 902, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 400, "pan.___", state 908, "((i<1))"
- line 400, "pan.___", state 908, "((i>=1))"
- line 407, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 927, "(1)"
- line 408, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, "pan.___", state 928, "else"
- line 408, "pan.___", state 931, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 412, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, "pan.___", state 941, "else"
- line 412, "pan.___", state 944, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 410, "pan.___", state 950, "((i<1))"
- line 410, "pan.___", state 950, "((i>=1))"
- line 417, "pan.___", state 957, "(1)"
- line 417, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, "pan.___", state 958, "else"
- line 417, "pan.___", state 961, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 402, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1040, "(1)"
- line 417, "pan.___", state 1057, "(1)"
- line 402, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1130, "(1)"
- line 417, "pan.___", state 1147, "(1)"
- line 398, "pan.___", state 1166, "(1)"
- line 402, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1222, "(1)"
- line 417, "pan.___", state 1239, "(1)"
- line 402, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1315, "(1)"
- line 417, "pan.___", state 1332, "(1)"
- line 178, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1378, "(1)"
- line 163, "pan.___", state 1386, "(1)"
- line 167, "pan.___", state 1398, "(1)"
- line 174, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1441, "(1)"
- line 163, "pan.___", state 1449, "(1)"
- line 167, "pan.___", state 1461, "(1)"
- line 174, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1508, "(1)"
- line 163, "pan.___", state 1516, "(1)"
- line 167, "pan.___", state 1528, "(1)"
- line 398, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 1552, "(1)"
- line 398, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 1553, "else"
- line 398, "pan.___", state 1556, "(1)"
- line 402, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 1566, "(1)"
- line 402, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 1567, "else"
- line 402, "pan.___", state 1570, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 400, "pan.___", state 1576, "((i<1))"
- line 400, "pan.___", state 1576, "((i>=1))"
- line 407, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1595, "(1)"
- line 408, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, "pan.___", state 1596, "else"
- line 408, "pan.___", state 1599, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 412, "pan.___", state 1608, "(1)"
- line 412, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, "pan.___", state 1609, "else"
- line 412, "pan.___", state 1612, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 410, "pan.___", state 1618, "((i<1))"
- line 410, "pan.___", state 1618, "((i>=1))"
- line 417, "pan.___", state 1625, "(1)"
- line 417, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, "pan.___", state 1626, "else"
- line 417, "pan.___", state 1629, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 178, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1681, "(1)"
- line 163, "pan.___", state 1689, "(1)"
- line 167, "pan.___", state 1701, "(1)"
- line 174, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1744, "(1)"
- line 163, "pan.___", state 1752, "(1)"
- line 167, "pan.___", state 1764, "(1)"
- line 174, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1811, "(1)"
- line 163, "pan.___", state 1819, "(1)"
- line 167, "pan.___", state 1831, "(1)"
- line 701, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 523 seconds
-pan: rate 90149.985 states/second
-pan: avg transition delay 9.1997e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-14657:2:2174
-14658:2:2181
-14659:2:2182
-14660:2:2193
-14661:2:2194
-14662:2:2195
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-14666:2:2206
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-14681:0:4365
-14682:2:2235
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+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_nested.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-Depth= 3880 States= 1e+06 Transitions= 1.18e+07 Memory= 527.190 t= 9.48 R= 1e+05
-Depth= 3880 States= 2e+06 Transitions= 2.39e+07 Memory= 588.225 t= 19.6 R= 1e+05
-Depth= 3880 States= 3e+06 Transitions= 3.61e+07 Memory= 649.260 t= 30.3 R= 1e+05
+++ /dev/null
-#define READER_NEST_LEVEL 1
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-#define get_pid() ((_pid < 1) -> 0 : 1)
-#elif defined(TEST_SIGNAL_ON_READ)
-#define get_pid() ((_pid < 2) -> 0 : 1)
-#else
-#define get_pid() (_pid)
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- dispatch_sighand_read_exec();
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
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+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-Depth= 6009 States= 1e+06 Transitions= 1.08e+07 Memory= 534.904 t= 9.22 R= 1e+05
-Depth= 6009 States= 2e+06 Transitions= 3.4e+07 Memory= 603.557 t= 31.1 R= 6e+04
-Depth= 7527 States= 3e+06 Transitions= 4.91e+07 Memory= 672.209 t= 45.6 R= 7e+04
-pan: resizing hashtable to -w22.. done
-Depth= 68651 States= 4e+06 Transitions= 6.74e+07 Memory= 772.080 t= 62.9 R= 6e+04
-Depth= 68651 States= 5e+06 Transitions= 8.62e+07 Memory= 840.733 t= 80.2 R= 6e+04
-Depth= 68651 States= 6e+06 Transitions= 1.03e+08 Memory= 909.385 t= 95.7 R= 6e+04
-Depth= 68651 States= 7e+06 Transitions= 1.21e+08 Memory= 978.037 t= 112 R= 6e+04
-Depth= 68651 States= 8e+06 Transitions= 1.37e+08 Memory= 1046.690 t= 128 R= 6e+04
-Depth= 68651 States= 9e+06 Transitions= 1.52e+08 Memory= 1115.440 t= 143 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 68651 States= 1e+07 Transitions= 1.72e+08 Memory= 1308.186 t= 163 R= 6e+04
-Depth= 68651 States= 1.1e+07 Transitions= 1.89e+08 Memory= 1376.838 t= 178 R= 6e+04
-Depth= 68651 States= 1.2e+07 Transitions= 2.05e+08 Memory= 1445.490 t= 193 R= 6e+04
-Depth= 68651 States= 1.3e+07 Transitions= 2.22e+08 Memory= 1514.143 t= 208 R= 6e+04
-Depth= 68651 States= 1.4e+07 Transitions= 2.39e+08 Memory= 1582.893 t= 224 R= 6e+04
-pan: claim violated! (at depth 2141)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 68651, errors: 1
- 14155711 states, stored
-2.2815817e+08 states, matched
-2.4231388e+08 transitions (= stored+matched)
-8.5461256e+08 atomic steps
-hash conflicts: 1.1483359e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1565.993 equivalent memory usage for states (stored*(State-vector + overhead))
- 1008.042 actual memory usage for states (compression: 64.37%)
- state-vector as stored = 47 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1593.537 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 227, "(1)"
- line 409, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 256, "(1)"
- line 419, "pan.___", state 286, "(1)"
- line 400, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 366, "(1)"
- line 409, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 395, "(1)"
- line 419, "pan.___", state 425, "(1)"
- line 541, "pan.___", state 456, "-end-"
- (19 of 456 states)
-unreached in proctype urcu_reader_sig
- line 400, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 70, "(1)"
- line 419, "pan.___", state 100, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 247, "(1)"
- line 419, "pan.___", state 277, "(1)"
- line 400, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 330, "(1)"
- line 409, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 359, "(1)"
- line 419, "pan.___", state 389, "(1)"
- line 615, "pan.___", state 411, "-end-"
- (18 of 411 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 410, "pan.___", state 153, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 400, "pan.___", state 209, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 223, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 254, "(1)"
- line 414, "pan.___", state 267, "(1)"
- line 400, "pan.___", state 300, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 314, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 345, "(1)"
- line 414, "pan.___", state 358, "(1)"
- line 400, "pan.___", state 395, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 409, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 440, "(1)"
- line 414, "pan.___", state 453, "(1)"
- line 400, "pan.___", state 488, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 533, "(1)"
- line 414, "pan.___", state 546, "(1)"
- line 400, "pan.___", state 582, "(1)"
- line 404, "pan.___", state 594, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 638, "(1)"
- line 404, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 731, "(1)"
- line 404, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 821, "(1)"
- line 419, "pan.___", state 838, "(1)"
- line 404, "pan.___", state 868, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 886, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 912, "(1)"
- line 419, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 963, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 981, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1007, "(1)"
- line 419, "pan.___", state 1024, "(1)"
- line 400, "pan.___", state 1050, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1053, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1053, "else"
- line 400, "pan.___", state 1056, "(1)"
- line 404, "pan.___", state 1064, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1066, "(1)"
- line 404, "pan.___", state 1067, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1067, "else"
- line 404, "pan.___", state 1070, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 402, "pan.___", state 1076, "((i<1))"
- line 402, "pan.___", state 1076, "((i>=1))"
- line 409, "pan.___", state 1082, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1095, "(1)"
- line 410, "pan.___", state 1096, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1096, "else"
- line 410, "pan.___", state 1099, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 414, "pan.___", state 1108, "(1)"
- line 414, "pan.___", state 1109, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1109, "else"
- line 414, "pan.___", state 1112, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 412, "pan.___", state 1118, "((i<1))"
- line 412, "pan.___", state 1118, "((i>=1))"
- line 419, "pan.___", state 1125, "(1)"
- line 419, "pan.___", state 1126, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1126, "else"
- line 419, "pan.___", state 1129, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 404, "pan.___", state 1164, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1208, "(1)"
- line 404, "pan.___", state 1254, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1298, "(1)"
- line 400, "pan.___", state 1334, "(1)"
- line 404, "pan.___", state 1346, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1390, "(1)"
- line 404, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1483, "(1)"
- line 404, "pan.___", state 1529, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1547, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1573, "(1)"
- line 419, "pan.___", state 1590, "(1)"
- line 404, "pan.___", state 1620, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1638, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1664, "(1)"
- line 419, "pan.___", state 1681, "(1)"
- line 404, "pan.___", state 1715, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1733, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1759, "(1)"
- line 419, "pan.___", state 1776, "(1)"
- line 400, "pan.___", state 1802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1804, "(1)"
- line 400, "pan.___", state 1805, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1805, "else"
- line 400, "pan.___", state 1808, "(1)"
- line 404, "pan.___", state 1816, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1818, "(1)"
- line 404, "pan.___", state 1819, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1819, "else"
- line 404, "pan.___", state 1822, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 402, "pan.___", state 1828, "((i<1))"
- line 402, "pan.___", state 1828, "((i>=1))"
- line 409, "pan.___", state 1834, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1847, "(1)"
- line 410, "pan.___", state 1848, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1848, "else"
- line 410, "pan.___", state 1851, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 414, "pan.___", state 1860, "(1)"
- line 414, "pan.___", state 1861, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1861, "else"
- line 414, "pan.___", state 1864, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 412, "pan.___", state 1870, "((i<1))"
- line 412, "pan.___", state 1870, "((i>=1))"
- line 419, "pan.___", state 1877, "(1)"
- line 419, "pan.___", state 1878, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1878, "else"
- line 419, "pan.___", state 1881, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 404, "pan.___", state 1916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1960, "(1)"
- line 404, "pan.___", state 2007, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 2051, "(1)"
- line 404, "pan.___", state 2102, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 2146, "(1)"
- line 703, "pan.___", state 2192, "-end-"
- (144 of 2192 states)
-unreached in proctype :init:
- line 710, "pan.___", state 9, "((j<2))"
- line 710, "pan.___", state 9, "((j>=2))"
- line 711, "pan.___", state 20, "((j<2))"
- line 711, "pan.___", state 20, "((j>=2))"
- line 716, "pan.___", state 33, "((j<2))"
- line 716, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 227 seconds
-pan: rate 62472.797 states/second
-pan: avg transition delay 9.3511e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-2:4:3059
-3:4:3062
-4:4:3062
-5:4:3065
-6:4:3073
-7:4:3073
-8:4:3076
-9:4:3082
-10:4:3086
-11:4:3086
-12:4:3089
-13:4:3097
-14:4:3101
-15:4:3102
-16:0:3107
-17:4:3104
-18:0:3107
-19:3:869
-20:0:3107
-21:3:875
-22:0:3107
-23:3:876
-24:0:3107
-25:3:877
-26:3:881
-27:3:882
-28:3:890
-29:3:891
-30:3:895
-31:3:896
-32:3:904
-33:3:909
-34:3:913
-35:3:914
-36:3:921
-37:3:922
-38:3:933
-39:3:934
-40:3:935
-41:3:946
-42:3:951
-43:3:952
-44:0:3107
-45:3:964
-46:0:3107
-47:3:966
-48:3:967
-49:0:3107
-50:3:971
-51:3:975
-52:3:976
-53:3:984
-54:3:985
-55:3:989
-56:3:990
-57:3:998
-58:3:1003
-59:3:1004
-60:3:1015
-61:3:1016
-62:3:1027
-63:3:1028
-64:3:1029
-65:3:1040
-66:3:1045
-67:3:1046
-68:0:3107
-69:3:1058
-70:0:3107
-71:3:1060
-72:0:3107
-73:3:1061
-74:0:3107
-75:3:1071
-76:0:3107
-77:3:1072
-78:3:1076
-79:3:1077
-80:3:1085
-81:3:1086
-82:3:1090
-83:3:1091
-84:3:1099
-85:3:1104
-86:3:1108
-87:3:1109
-88:3:1116
-89:3:1117
-90:3:1128
-91:3:1129
-92:3:1130
-93:3:1141
-94:3:1146
-95:3:1147
-96:0:3107
-97:3:1162
-98:0:3107
-99:3:1163
-100:3:1167
-101:3:1168
-102:3:1176
-103:3:1177
-104:3:1181
-105:3:1182
-106:3:1190
-107:3:1195
-108:3:1199
-109:3:1200
-110:3:1207
-111:3:1208
-112:3:1219
-113:3:1220
-114:3:1221
-115:3:1232
-116:3:1237
-117:3:1238
-118:0:3107
-119:3:1253
-120:0:3107
-121:3:1258
-122:3:1262
-123:3:1263
-124:3:1271
-125:3:1272
-126:3:1276
-127:3:1277
-128:3:1285
-129:3:1290
-130:3:1294
-131:3:1295
-132:3:1302
-133:3:1303
-134:3:1314
-135:3:1315
-136:3:1316
-137:3:1327
-138:3:1332
-139:3:1333
-140:0:3107
-141:3:1348
-142:0:3107
-143:3:1350
-144:0:3107
-145:3:1351
-146:3:1355
-147:3:1356
-148:3:1364
-149:3:1365
-150:3:1369
-151:3:1370
-152:3:1378
-153:3:1383
-154:3:1387
-155:3:1388
-156:3:1395
-157:3:1396
-158:3:1407
-159:3:1408
-160:3:1409
-161:3:1420
-162:3:1425
-163:3:1426
-164:0:3107
-165:3:1438
-166:0:3107
-167:3:1440
-168:0:3107
-169:3:1443
-170:3:1444
-171:3:1456
-172:3:1457
-173:3:1461
-174:3:1462
-175:3:1470
-176:3:1475
-177:3:1479
-178:3:1480
-179:3:1487
-180:3:1488
-181:3:1499
-182:3:1500
-183:3:1501
-184:3:1512
-185:3:1517
-186:3:1518
-187:0:3107
-188:3:1530
-189:0:3107
-190:3:1532
-191:0:3107
-192:3:1533
-193:0:3107
-194:3:1534
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-1912:3:2965
-1913:3:2969
-1914:3:2970
-1915:3:2978
-1916:3:2991
-1917:3:2992
-1918:3:2995
-1919:3:2996
-1920:3:3007
-1921:3:3008
-1922:3:3009
-1923:3:3020
-1924:3:3025
-1925:3:3028
-1926:3:3029
-1927:0:3107
-1928:3:3041
-1929:0:3107
-1930:3:3043
-1931:0:3107
-1932:3:3044
-1933:0:3107
-1934:3:3047
-1935:0:3107
-1936:3:3052
-1937:0:3107
-1938:2:458
-1939:0:3107
-1940:3:3053
-1941:0:3107
-1942:2:464
-1943:0:3107
-1944:3:3052
-1945:0:3107
-1946:2:465
-1947:0:3107
-1948:3:3053
-1949:0:3107
-1950:2:466
-1951:0:3107
-1952:3:3052
-1953:0:3107
-1954:2:467
-1955:0:3107
-1956:3:3053
-1957:0:3107
-1958:1:2
-1959:0:3107
-1960:3:3052
-1961:0:3107
-1962:2:468
-1963:0:3107
-1964:3:3053
-1965:0:3107
-1966:1:8
-1967:0:3107
-1968:3:3052
-1969:0:3107
-1970:2:467
-1971:0:3107
-1972:3:3053
-1973:0:3107
-1974:1:9
-1975:0:3107
-1976:3:3052
-1977:0:3107
-1978:2:468
-1979:0:3107
-1980:3:3053
-1981:0:3107
-1982:1:10
-1983:0:3107
-1984:3:3052
-1985:0:3107
-1986:2:467
-1987:0:3107
-1988:3:3053
-1989:0:3107
-1990:1:11
-1991:0:3107
-1992:3:3052
-1993:0:3107
-1994:2:468
-1995:0:3107
-1996:3:3053
-1997:0:3107
-1998:1:12
-1999:1:16
-2000:1:17
-2001:1:25
-2002:1:26
-2003:1:30
-2004:1:31
-2005:1:39
-2006:1:44
-2007:1:48
-2008:1:49
-2009:1:56
-2010:1:57
-2011:1:68
-2012:1:69
-2013:1:70
-2014:1:81
-2015:1:86
-2016:1:87
-2017:0:3107
-2018:3:3052
-2019:0:3107
-2020:2:467
-2021:0:3107
-2022:3:3053
-2023:0:3107
-2024:1:99
-2025:0:3107
-2026:3:3052
-2027:0:3107
-2028:2:468
-2029:0:3107
-2030:3:3053
-2031:0:3107
-2032:2:469
-2033:0:3107
-2034:3:3052
-2035:0:3107
-2036:2:475
-2037:0:3107
-2038:3:3053
-2039:0:3107
-2040:2:476
-2041:0:3107
-2042:3:3052
-2043:0:3107
-2044:2:477
-2045:2:481
-2046:2:482
-2047:2:490
-2048:2:491
-2049:2:495
-2050:2:496
-2051:2:504
-2052:2:509
-2053:2:513
-2054:2:514
-2055:2:521
-2056:2:522
-2057:2:533
-2058:2:534
-2059:2:535
-2060:2:546
-2061:2:551
-2062:2:552
-2063:0:3107
-2064:3:3053
-2065:0:3107
-2066:2:564
-2067:0:3107
-2068:3:3052
-2069:0:3107
-2070:2:565
-2071:2:569
-2072:2:570
-2073:2:578
-2074:2:579
-2075:2:583
-2076:2:584
-2077:2:592
-2078:2:597
-2079:2:601
-2080:2:602
-2081:2:609
-2082:2:610
-2083:2:621
-2084:2:622
-2085:2:623
-2086:2:634
-2087:2:639
-2088:2:640
-2089:0:3107
-2090:3:3053
-2091:0:3107
-2092:2:652
-2093:0:3107
-2094:3:3052
-2095:0:3107
-2096:2:653
-2097:0:3107
-2098:3:3053
-2099:0:3107
-2100:2:654
-2101:2:658
-2102:2:659
-2103:2:667
-2104:2:668
-2105:2:672
-2106:2:673
-2107:2:681
-2108:2:686
-2109:2:690
-2110:2:691
-2111:2:698
-2112:2:699
-2113:2:710
-2114:2:711
-2115:2:712
-2116:2:723
-2117:2:728
-2118:2:729
-2119:0:3107
-2120:3:3052
-2121:0:3107
-2122:2:741
-2123:0:3107
-2124:3:3053
-2125:0:3107
-2126:2:750
-2127:0:3107
-2128:3:3052
-2129:0:3107
-2130:2:753
-2131:0:3107
-2132:3:3053
-2133:0:3107
-2134:2:758
-2135:0:3107
-2136:3:3052
-2137:0:3107
-2138:2:759
-2139:0:3105
-2140:3:3053
-2141:0:3111
-2142:2:647
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 5678 States= 1e+06 Transitions= 8.21e+06 Memory= 534.904 t= 6.72 R= 1e+05
-Depth= 5678 States= 2e+06 Transitions= 1.6e+07 Memory= 603.557 t= 13.4 R= 1e+05
-Depth= 16003 States= 3e+06 Transitions= 2.49e+07 Memory= 672.209 t= 21.5 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 31043 States= 4e+06 Transitions= 3.44e+07 Memory= 771.983 t= 30.1 R= 1e+05
-Depth= 31043 States= 5e+06 Transitions= 4.41e+07 Memory= 840.635 t= 38.4 R= 1e+05
-Depth= 31043 States= 6e+06 Transitions= 5.25e+07 Memory= 909.287 t= 45.7 R= 1e+05
-Depth= 31043 States= 7e+06 Transitions= 6.12e+07 Memory= 977.940 t= 53.4 R= 1e+05
-Depth= 31043 States= 8e+06 Transitions= 6.95e+07 Memory= 1046.690 t= 60.8 R= 1e+05
-Depth= 31043 States= 9e+06 Transitions= 7.78e+07 Memory= 1115.342 t= 68.5 R= 1e+05
-pan: resizing hashtable to -w24.. done
-Depth= 31043 States= 1e+07 Transitions= 8.68e+07 Memory= 1308.088 t= 77.9 R= 1e+05
-Depth= 31043 States= 1.1e+07 Transitions= 1.01e+08 Memory= 1376.740 t= 90.1 R= 1e+05
-Depth= 31043 States= 1.2e+07 Transitions= 1.13e+08 Memory= 1445.393 t= 101 R= 1e+05
-Depth= 31043 States= 1.3e+07 Transitions= 1.25e+08 Memory= 1514.045 t= 111 R= 1e+05
-Depth= 31043 States= 1.4e+07 Transitions= 1.38e+08 Memory= 1582.795 t= 122 R= 1e+05
-pan: claim violated! (at depth 1774)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 31043, errors: 1
- 14288659 states, stored
-1.2755714e+08 states, matched
-1.418458e+08 transitions (= stored+matched)
-4.6616273e+08 atomic steps
-hash conflicts: 65726574 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1253.659 equivalent memory usage for states (stored*(State-vector + overhead))
- 1017.191 actual memory usage for states (compression: 81.14%)
- state-vector as stored = 47 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1602.619 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 243, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 265, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 291, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 304, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 320, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 334, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 352, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 365, "(1)"
- line 413, "pan.___", state 378, "(1)"
- line 418, "pan.___", state 395, "(1)"
- line 399, "pan.___", state 414, "(1)"
- line 403, "pan.___", state 426, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 444, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 487, "(1)"
- line 403, "pan.___", state 519, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 537, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 563, "(1)"
- line 418, "pan.___", state 580, "(1)"
- line 179, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 629, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 651, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 677, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 690, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 714, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 716, "(1)"
- line 399, "pan.___", state 717, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 717, "else"
- line 399, "pan.___", state 720, "(1)"
- line 403, "pan.___", state 728, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 730, "(1)"
- line 403, "pan.___", state 731, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 731, "else"
- line 403, "pan.___", state 734, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 401, "pan.___", state 740, "((i<1))"
- line 401, "pan.___", state 740, "((i>=1))"
- line 408, "pan.___", state 746, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 759, "(1)"
- line 409, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 760, "else"
- line 409, "pan.___", state 763, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 413, "pan.___", state 772, "(1)"
- line 413, "pan.___", state 773, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 773, "else"
- line 413, "pan.___", state 776, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 411, "pan.___", state 782, "((i<1))"
- line 411, "pan.___", state 782, "((i>=1))"
- line 418, "pan.___", state 789, "(1)"
- line 418, "pan.___", state 790, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 790, "else"
- line 418, "pan.___", state 793, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 403, "pan.___", state 828, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 846, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 872, "(1)"
- line 418, "pan.___", state 889, "(1)"
- line 403, "pan.___", state 918, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 936, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 979, "(1)"
- line 399, "pan.___", state 998, "(1)"
- line 403, "pan.___", state 1010, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1028, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1054, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 403, "pan.___", state 1103, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1121, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1147, "(1)"
- line 418, "pan.___", state 1164, "(1)"
- line 179, "pan.___", state 1187, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1200, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 1213, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1235, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1252, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1261, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1300, "(1)"
- line 399, "pan.___", state 1301, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1301, "else"
- line 399, "pan.___", state 1304, "(1)"
- line 403, "pan.___", state 1312, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1314, "(1)"
- line 403, "pan.___", state 1315, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1315, "else"
- line 403, "pan.___", state 1318, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 401, "pan.___", state 1324, "((i<1))"
- line 401, "pan.___", state 1324, "((i>=1))"
- line 408, "pan.___", state 1330, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1343, "(1)"
- line 409, "pan.___", state 1344, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1344, "else"
- line 409, "pan.___", state 1347, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 413, "pan.___", state 1356, "(1)"
- line 413, "pan.___", state 1357, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1357, "else"
- line 413, "pan.___", state 1360, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 411, "pan.___", state 1366, "((i<1))"
- line 411, "pan.___", state 1366, "((i>=1))"
- line 418, "pan.___", state 1373, "(1)"
- line 418, "pan.___", state 1374, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1374, "else"
- line 418, "pan.___", state 1377, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 179, "pan.___", state 1406, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1419, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 1432, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1454, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1471, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1480, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1493, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 702, "pan.___", state 1520, "-end-"
- (144 of 1520 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 125 seconds
-pan: rate 114108.44 states/second
-pan: avg transition delay 8.8279e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-1552:0:2435
-1553:3:1859
-1554:3:1860
-1555:3:1872
-1556:3:1873
-1557:3:1877
-1558:3:1878
-1559:3:1886
-1560:3:1891
-1561:3:1895
-1562:3:1896
-1563:3:1903
-1564:3:1904
-1565:3:1915
-1566:3:1916
-1567:3:1917
-1568:3:1928
-1569:3:1933
-1570:3:1934
-1571:0:2435
-1572:3:1946
-1573:0:2435
-1574:3:1948
-1575:0:2435
-1576:3:1949
-1577:0:2435
-1578:3:1950
-1579:0:2435
-1580:3:1951
-1581:0:2435
-1582:3:1952
-1583:3:1956
-1584:3:1957
-1585:3:1965
-1586:3:1966
-1587:3:1970
-1588:3:1971
-1589:3:1979
-1590:3:1984
-1591:3:1988
-1592:3:1989
-1593:3:1996
-1594:3:1997
-1595:3:2008
-1596:3:2009
-1597:3:2010
-1598:3:2021
-1599:3:2026
-1600:3:2027
-1601:0:2435
-1602:3:2039
-1603:0:2435
-1604:3:2152
-1605:0:2435
-1606:3:2250
-1607:0:2435
-1608:3:2251
-1609:0:2435
-1610:3:2255
-1611:0:2435
-1612:3:2264
-1613:3:2265
-1614:3:2269
-1615:3:2273
-1616:3:2274
-1617:3:2278
-1618:3:2286
-1619:3:2287
-1620:0:2435
-1621:3:2295
-1622:0:2435
-1623:3:2299
-1624:3:2300
-1625:3:2304
-1626:3:2308
-1627:3:2309
-1628:3:2313
-1629:3:2321
-1630:3:2322
-1631:0:2435
-1632:3:2330
-1633:0:2435
-1634:3:2338
-1635:3:2339
-1636:3:2343
-1637:3:2347
-1638:3:2348
-1639:3:2352
-1640:3:2360
-1641:3:2361
-1642:0:2435
-1643:3:2369
-1644:0:2435
-1645:3:2371
-1646:0:2435
-1647:3:2372
-1648:0:2435
-1649:3:2375
-1650:0:2435
-1651:3:2380
-1652:0:2435
-1653:2:467
-1654:0:2435
-1655:3:2381
-1656:0:2435
-1657:1:99
-1658:0:2435
-1659:3:2380
-1660:0:2435
-1661:2:468
-1662:0:2435
-1663:3:2381
-1664:0:2435
-1665:2:469
-1666:0:2435
-1667:3:2380
-1668:0:2435
-1669:2:475
-1670:0:2435
-1671:3:2381
-1672:0:2435
-1673:2:476
-1674:0:2435
-1675:3:2380
-1676:0:2435
-1677:2:477
-1678:2:481
-1679:2:482
-1680:2:490
-1681:2:491
-1682:2:495
-1683:2:496
-1684:2:504
-1685:2:509
-1686:2:513
-1687:2:514
-1688:2:521
-1689:2:522
-1690:2:533
-1691:2:534
-1692:2:535
-1693:2:546
-1694:2:558
-1695:2:559
-1696:0:2435
-1697:3:2381
-1698:0:2435
-1699:2:564
-1700:0:2435
-1701:3:2380
-1702:0:2435
-1703:2:565
-1704:2:569
-1705:2:570
-1706:2:578
-1707:2:579
-1708:2:583
-1709:2:584
-1710:2:592
-1711:2:597
-1712:2:601
-1713:2:602
-1714:2:609
-1715:2:610
-1716:2:621
-1717:2:622
-1718:2:623
-1719:2:634
-1720:2:646
-1721:2:647
-1722:0:2435
-1723:3:2381
-1724:0:2435
-1725:2:652
-1726:0:2435
-1727:3:2380
-1728:0:2435
-1729:2:653
-1730:0:2435
-1731:3:2381
-1732:0:2435
-1733:2:654
-1734:2:658
-1735:2:659
-1736:2:667
-1737:2:668
-1738:2:672
-1739:2:673
-1740:2:681
-1741:2:686
-1742:2:690
-1743:2:691
-1744:2:698
-1745:2:699
-1746:2:710
-1747:2:711
-1748:2:712
-1749:2:723
-1750:2:735
-1751:2:736
-1752:0:2435
-1753:3:2380
-1754:0:2435
-1755:2:741
-1756:0:2435
-1757:3:2381
-1758:0:2435
-1759:2:750
-1760:0:2435
-1761:3:2380
-1762:0:2435
-1763:2:753
-1764:0:2435
-1765:3:2381
-1766:0:2435
-1767:2:758
-1768:0:2435
-1769:3:2380
-1770:0:2435
-1771:2:759
-1772:0:2433
-1773:3:2381
-1774:0:2439
-1775:0:2435
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 10656 States= 1e+06 Transitions= 8.86e+06 Memory= 534.807 t= 7.38 R= 1e+05
-Depth= 35214 States= 2e+06 Transitions= 1.82e+07 Memory= 603.557 t= 15.5 R= 1e+05
-Depth= 35214 States= 3e+06 Transitions= 2.73e+07 Memory= 672.209 t= 23.8 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 35214 States= 4e+06 Transitions= 4.08e+07 Memory= 771.885 t= 35.9 R= 1e+05
-pan: claim violated! (at depth 1650)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 35214, errors: 1
- 4154272 states, stored
- 38595853 states, matched
- 42750125 transitions (= stored+matched)
-1.4058824e+08 atomic steps
-hash conflicts: 21492325 (resolved)
-
-Stats on memory usage (in Megabytes):
- 364.488 equivalent memory usage for states (stored*(State-vector + overhead))
- 292.863 actual memory usage for states (compression: 80.35%)
- state-vector as stored = 46 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 782.529 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 227, "(1)"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 366, "(1)"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (19 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 330, "(1)"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (18 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 401, "pan.___", state 134, "((i<1))"
- line 401, "pan.___", state 134, "((i>=1))"
- line 409, "pan.___", state 153, "(1)"
- line 409, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 154, "else"
- line 409, "pan.___", state 157, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 413, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 167, "else"
- line 413, "pan.___", state 170, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 411, "pan.___", state 176, "((i<1))"
- line 411, "pan.___", state 176, "((i>=1))"
- line 418, "pan.___", state 183, "(1)"
- line 418, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 184, "else"
- line 418, "pan.___", state 187, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 369, "pan.___", state 193, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 646, "pan.___", state 202, "((write_lock==0))"
- line 646, "pan.___", state 202, "else"
- line 644, "pan.___", state 203, "(1)"
- line 160, "pan.___", state 209, "(1)"
- line 164, "pan.___", state 217, "(1)"
- line 164, "pan.___", state 218, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 164, "pan.___", state 218, "else"
- line 162, "pan.___", state 223, "((j<1))"
- line 162, "pan.___", state 223, "((j>=1))"
- line 168, "pan.___", state 229, "(1)"
- line 168, "pan.___", state 230, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 168, "pan.___", state 230, "else"
- line 160, "pan.___", state 241, "(1)"
- line 168, "pan.___", state 261, "(1)"
- line 160, "pan.___", state 277, "(1)"
- line 164, "pan.___", state 285, "(1)"
- line 168, "pan.___", state 297, "(1)"
- line 399, "pan.___", state 311, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 325, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 343, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 356, "(1)"
- line 413, "pan.___", state 369, "(1)"
- line 418, "pan.___", state 386, "(1)"
- line 399, "pan.___", state 405, "(1)"
- line 403, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 461, "(1)"
- line 418, "pan.___", state 478, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 164, "pan.___", state 594, "(1)"
- line 168, "pan.___", state 606, "(1)"
- line 160, "pan.___", state 618, "(1)"
- line 168, "pan.___", state 638, "(1)"
- line 164, "pan.___", state 662, "(1)"
- line 168, "pan.___", state 674, "(1)"
- line 399, "pan.___", state 696, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 698, "(1)"
- line 399, "pan.___", state 699, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 699, "else"
- line 399, "pan.___", state 702, "(1)"
- line 403, "pan.___", state 710, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 712, "(1)"
- line 403, "pan.___", state 713, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 713, "else"
- line 403, "pan.___", state 716, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 401, "pan.___", state 722, "((i<1))"
- line 401, "pan.___", state 722, "((i>=1))"
- line 408, "pan.___", state 728, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 741, "(1)"
- line 409, "pan.___", state 742, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 742, "else"
- line 409, "pan.___", state 745, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 413, "pan.___", state 754, "(1)"
- line 413, "pan.___", state 755, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 755, "else"
- line 413, "pan.___", state 758, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 411, "pan.___", state 764, "((i<1))"
- line 411, "pan.___", state 764, "((i>=1))"
- line 418, "pan.___", state 771, "(1)"
- line 418, "pan.___", state 772, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 772, "else"
- line 418, "pan.___", state 775, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 403, "pan.___", state 810, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 828, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 854, "(1)"
- line 418, "pan.___", state 871, "(1)"
- line 403, "pan.___", state 900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 918, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 944, "(1)"
- line 418, "pan.___", state 961, "(1)"
- line 399, "pan.___", state 980, "(1)"
- line 403, "pan.___", state 992, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1010, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1036, "(1)"
- line 418, "pan.___", state 1053, "(1)"
- line 403, "pan.___", state 1085, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1103, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1129, "(1)"
- line 418, "pan.___", state 1146, "(1)"
- line 164, "pan.___", state 1169, "(1)"
- line 168, "pan.___", state 1181, "(1)"
- line 160, "pan.___", state 1193, "(1)"
- line 168, "pan.___", state 1213, "(1)"
- line 164, "pan.___", state 1237, "(1)"
- line 168, "pan.___", state 1249, "(1)"
- line 399, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1273, "(1)"
- line 399, "pan.___", state 1274, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1274, "else"
- line 399, "pan.___", state 1277, "(1)"
- line 403, "pan.___", state 1285, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1287, "(1)"
- line 403, "pan.___", state 1288, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1288, "else"
- line 403, "pan.___", state 1291, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 401, "pan.___", state 1297, "((i<1))"
- line 401, "pan.___", state 1297, "((i>=1))"
- line 408, "pan.___", state 1303, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1316, "(1)"
- line 409, "pan.___", state 1317, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1317, "else"
- line 409, "pan.___", state 1320, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 413, "pan.___", state 1329, "(1)"
- line 413, "pan.___", state 1330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1330, "else"
- line 413, "pan.___", state 1333, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 411, "pan.___", state 1339, "((i<1))"
- line 411, "pan.___", state 1339, "((i>=1))"
- line 418, "pan.___", state 1346, "(1)"
- line 418, "pan.___", state 1347, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1347, "else"
- line 418, "pan.___", state 1350, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 164, "pan.___", state 1379, "(1)"
- line 168, "pan.___", state 1391, "(1)"
- line 160, "pan.___", state 1403, "(1)"
- line 168, "pan.___", state 1423, "(1)"
- line 164, "pan.___", state 1447, "(1)"
- line 168, "pan.___", state 1459, "(1)"
- line 702, "pan.___", state 1484, "-end-"
- (160 of 1484 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 37.6 seconds
-pan: rate 110515.35 states/second
-pan: avg transition delay 8.793e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-3:4:2354
-4:4:2354
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-1645:3:2344
-1646:0:2399
-1647:2:759
-1648:0:2397
-1649:3:2345
-1650:0:2403
-1651:2:518
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 8352 States= 1e+06 Transitions= 1.05e+07 Memory= 534.807 t= 8.93 R= 1e+05
-pan: claim violated! (at depth 1352)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 8352, errors: 1
- 1456373 states, stored
- 13442538 states, matched
- 14898911 transitions (= stored+matched)
- 50580660 atomic steps
-hash conflicts: 5166006 (resolved)
-
-Stats on memory usage (in Megabytes):
- 127.779 equivalent memory usage for states (stored*(State-vector + overhead))
- 100.443 actual memory usage for states (compression: 78.61%)
- state-vector as stored = 44 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 566.154 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 179, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1003, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1013, "(1)"
- line 164, "pan.___", state 1021, "(1)"
- line 168, "pan.___", state 1033, "(1)"
- line 175, "pan.___", state 1044, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1066, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1076, "(1)"
- line 164, "pan.___", state 1084, "(1)"
- line 168, "pan.___", state 1096, "(1)"
- line 175, "pan.___", state 1111, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1133, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1143, "(1)"
- line 164, "pan.___", state 1151, "(1)"
- line 168, "pan.___", state 1163, "(1)"
- line 702, "pan.___", state 1188, "-end-"
- (100 of 1188 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 12.8 seconds
-pan: rate 113424.69 states/second
-pan: avg transition delay 8.6181e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-4:4:2058
-5:4:2061
-6:4:2069
-7:4:2069
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-11:4:2082
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-13:4:2093
-14:4:2097
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-22:0:2103
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-30:3:895
-31:3:896
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-33:3:909
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-36:3:921
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-57:3:998
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-59:3:1004
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-191:3:1496
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-249:3:2001
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-251:3:2013
-252:3:2014
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-271:3:904
-272:3:909
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-274:3:914
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-291:3:976
-292:3:984
-293:3:985
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-304:3:1040
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-331:0:2103
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-334:3:1143
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-1244:3:1403
-1245:3:1404
-1246:3:1415
-1247:3:1416
-1248:3:1417
-1249:3:1428
-1250:3:1433
-1251:3:1434
-1252:0:2103
-1253:3:1446
-1254:0:2103
-1255:3:1448
-1256:0:2103
-1257:3:1449
-1258:0:2103
-1259:3:1450
-1260:0:2103
-1261:3:1451
-1262:0:2103
-1263:3:1452
-1264:3:1456
-1265:3:1457
-1266:3:1465
-1267:3:1466
-1268:3:1470
-1269:3:1471
-1270:3:1479
-1271:3:1484
-1272:3:1488
-1273:3:1489
-1274:3:1496
-1275:3:1497
-1276:3:1508
-1277:3:1509
-1278:3:1510
-1279:3:1521
-1280:3:1526
-1281:3:1527
-1282:0:2103
-1283:3:1539
-1284:0:2103
-1285:3:1736
-1286:0:2103
-1287:3:1834
-1288:0:2103
-1289:3:1835
-1290:0:2103
-1291:3:1839
-1292:0:2103
-1293:3:1848
-1294:3:1849
-1295:3:1853
-1296:3:1857
-1297:3:1858
-1298:3:1862
-1299:3:1870
-1300:3:1871
-1301:3:1876
-1302:3:1883
-1303:3:1884
-1304:3:1891
-1305:3:1896
-1306:0:2103
-1307:3:1907
-1308:0:2103
-1309:3:1911
-1310:3:1912
-1311:3:1916
-1312:3:1920
-1313:3:1921
-1314:3:1925
-1315:3:1933
-1316:3:1934
-1317:3:1939
-1318:3:1946
-1319:3:1947
-1320:3:1954
-1321:3:1959
-1322:0:2103
-1323:3:1970
-1324:0:2103
-1325:3:1978
-1326:3:1979
-1327:3:1983
-1328:3:1987
-1329:3:1988
-1330:3:1992
-1331:3:2000
-1332:3:2001
-1333:3:2006
-1334:3:2013
-1335:3:2014
-1336:3:2021
-1337:3:2026
-1338:0:2103
-1339:3:2037
-1340:0:2103
-1341:3:2039
-1342:0:2103
-1343:3:2040
-1344:0:2103
-1345:3:2043
-1346:0:2103
-1347:3:2048
-1348:0:2103
-1349:2:759
-1350:0:2101
-1351:3:2049
-1352:0:2107
-1353:3:1181
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1803: Claim reached state 9 (line 748)
-Depth= 5838 States= 1e+06 Transitions= 1.06e+07 Memory= 494.865 t= 9.24 R= 1e+05
-Depth= 5838 States= 2e+06 Transitions= 1.97e+07 Memory= 532.658 t= 17.7 R= 1e+05
-Depth= 5838 States= 3e+06 Transitions= 3.15e+07 Memory= 555.315 t= 28.4 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 6855 States= 4e+06 Transitions= 4.32e+07 Memory= 613.096 t= 39.1 R= 1e+05
-Depth= 9059 States= 5e+06 Transitions= 5.48e+07 Memory= 642.295 t= 49.5 R= 1e+05
-Depth= 9059 States= 6e+06 Transitions= 6.91e+07 Memory= 672.178 t= 62.5 R= 1e+05
-Depth= 9059 States= 7e+06 Transitions= 7.99e+07 Memory= 706.455 t= 72.5 R= 1e+05
-Depth= 9059 States= 8e+06 Transitions= 9.23e+07 Memory= 735.752 t= 84 R= 1e+05
-Depth= 9059 States= 9e+06 Transitions= 1.04e+08 Memory= 766.318 t= 94.5 R= 1e+05
-pan: resizing hashtable to -w24.. done
-Depth= 9059 States= 1e+07 Transitions= 1.16e+08 Memory= 920.002 t= 106 R= 9e+04
-Depth= 9059 States= 1.1e+07 Transitions= 1.3e+08 Memory= 945.002 t= 119 R= 9e+04
-Depth= 9059 States= 1.2e+07 Transitions= 1.54e+08 Memory= 967.756 t= 140 R= 9e+04
-Depth= 9059 States= 1.3e+07 Transitions= 1.72e+08 Memory= 995.002 t= 157 R= 8e+04
-Depth= 9059 States= 1.4e+07 Transitions= 1.92e+08 Memory= 1022.736 t= 175 R= 8e+04
-Depth= 9059 States= 1.5e+07 Transitions= 2.1e+08 Memory= 1050.080 t= 191 R= 8e+04
-Depth= 9059 States= 1.6e+07 Transitions= 2.22e+08 Memory= 1082.502 t= 203 R= 8e+04
-Depth= 9059 States= 1.7e+07 Transitions= 2.41e+08 Memory= 1108.479 t= 219 R= 8e+04
-Depth= 9059 States= 1.8e+07 Transitions= 2.58e+08 Memory= 1134.455 t= 235 R= 8e+04
-Depth= 9059 States= 1.9e+07 Transitions= 2.7e+08 Memory= 1164.533 t= 246 R= 8e+04
-Depth= 9059 States= 2e+07 Transitions= 2.83e+08 Memory= 1193.830 t= 258 R= 8e+04
-Depth= 9059 States= 2.1e+07 Transitions= 3.03e+08 Memory= 1219.026 t= 276 R= 8e+04
-Depth= 9059 States= 2.2e+07 Transitions= 3.19e+08 Memory= 1248.420 t= 291 R= 8e+04
-Depth= 9059 States= 2.3e+07 Transitions= 3.42e+08 Memory= 1271.858 t= 312 R= 7e+04
-Depth= 9059 States= 2.4e+07 Transitions= 3.6e+08 Memory= 1298.908 t= 328 R= 7e+04
-Depth= 9059 States= 2.5e+07 Transitions= 3.84e+08 Memory= 1323.127 t= 350 R= 7e+04
-Depth= 9059 States= 2.6e+07 Transitions= 4e+08 Memory= 1348.518 t= 365 R= 7e+04
-Depth= 9059 States= 2.7e+07 Transitions= 4.16e+08 Memory= 1379.865 t= 380 R= 7e+04
-Depth= 9059 States= 2.8e+07 Transitions= 4.26e+08 Memory= 1411.115 t= 389 R= 7e+04
-Depth= 9059 States= 2.9e+07 Transitions= 4.42e+08 Memory= 1439.631 t= 404 R= 7e+04
-Depth= 9059 States= 3e+07 Transitions= 4.64e+08 Memory= 1462.385 t= 423 R= 7e+04
-Depth= 9059 States= 3.1e+07 Transitions= 4.82e+08 Memory= 1490.998 t= 439 R= 7e+04
-Depth= 9059 States= 3.2e+07 Transitions= 4.99e+08 Memory= 1519.514 t= 456 R= 7e+04
-Depth= 9059 States= 3.3e+07 Transitions= 5.18e+08 Memory= 1545.393 t= 473 R= 7e+04
-Depth= 9059 States= 3.4e+07 Transitions= 5.33e+08 Memory= 1578.108 t= 486 R= 7e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9059 States= 3.5e+07 Transitions= 5.49e+08 Memory= 2098.994 t= 504 R= 7e+04
-Depth= 9059 States= 3.6e+07 Transitions= 5.74e+08 Memory= 2121.651 t= 528 R= 7e+04
-Depth= 9059 States= 3.7e+07 Transitions= 5.96e+08 Memory= 2147.334 t= 547 R= 7e+04
-Depth= 9059 States= 3.8e+07 Transitions= 6.17e+08 Memory= 2170.186 t= 567 R= 7e+04
-Depth= 9059 States= 3.9e+07 Transitions= 6.3e+08 Memory= 2199.776 t= 578 R= 7e+04
-Depth= 9059 States= 4e+07 Transitions= 6.53e+08 Memory= 2225.459 t= 599 R= 7e+04
-Depth= 9059 States= 4.1e+07 Transitions= 6.69e+08 Memory= 2250.361 t= 614 R= 7e+04
-Depth= 9059 States= 4.2e+07 Transitions= 6.85e+08 Memory= 2279.268 t= 628 R= 7e+04
-Depth= 9059 States= 4.3e+07 Transitions= 7.03e+08 Memory= 2304.463 t= 644 R= 7e+04
-Depth= 9059 States= 4.4e+07 Transitions= 7.13e+08 Memory= 2338.252 t= 654 R= 7e+04
-Depth= 9059 States= 4.5e+07 Transitions= 7.25e+08 Memory= 2366.768 t= 665 R= 7e+04
-Depth= 9059 States= 4.6e+07 Transitions= 7.41e+08 Memory= 2393.330 t= 679 R= 7e+04
-Depth= 9059 States= 4.7e+07 Transitions= 7.57e+08 Memory= 2420.381 t= 694 R= 7e+04
-Depth= 9059 States= 4.8e+07 Transitions= 7.72e+08 Memory= 2447.041 t= 708 R= 7e+04
-Depth= 9059 States= 4.9e+07 Transitions= 7.88e+08 Memory= 2476.143 t= 722 R= 7e+04
-Depth= 9059 States= 5e+07 Transitions= 8.04e+08 Memory= 2501.045 t= 737 R= 7e+04
-Depth= 9059 States= 5.1e+07 Transitions= 8.2e+08 Memory= 2530.440 t= 752 R= 7e+04
-Depth= 9059 States= 5.2e+07 Transitions= 8.37e+08 Memory= 2554.854 t= 766 R= 7e+04
-Depth= 9059 States= 5.3e+07 Transitions= 8.5e+08 Memory= 2583.467 t= 779 R= 7e+04
-Depth= 9059 States= 5.4e+07 Transitions= 8.66e+08 Memory= 2611.299 t= 794 R= 7e+04
-Depth= 9059 States= 5.5e+07 Transitions= 8.79e+08 Memory= 2640.791 t= 805 R= 7e+04
-Depth= 9059 States= 5.6e+07 Transitions= 8.9e+08 Memory= 2672.139 t= 815 R= 7e+04
-Depth= 9059 States= 5.7e+07 Transitions= 9.05e+08 Memory= 2702.705 t= 829 R= 7e+04
-Depth= 9059 States= 5.8e+07 Transitions= 9.22e+08 Memory= 2727.998 t= 845 R= 7e+04
-Depth= 9059 States= 5.9e+07 Transitions= 9.38e+08 Memory= 2754.463 t= 859 R= 7e+04
-Depth= 9059 States= 6e+07 Transitions= 9.49e+08 Memory= 2789.717 t= 870 R= 7e+04
-Depth= 9059 States= 6.1e+07 Transitions= 9.62e+08 Memory= 2817.744 t= 881 R= 7e+04
-Depth= 9059 States= 6.2e+07 Transitions= 9.79e+08 Memory= 2838.447 t= 896 R= 7e+04
-Depth= 9059 States= 6.3e+07 Transitions= 1e+09 Memory= 2863.154 t= 919 R= 7e+04
-Depth= 9059 States= 6.4e+07 Transitions= 1.02e+09 Memory= 2889.131 t= 936 R= 7e+04
-Depth= 9059 States= 6.5e+07 Transitions= 1.04e+09 Memory= 2919.502 t= 952 R= 7e+04
-Depth= 9059 States= 6.6e+07 Transitions= 1.06e+09 Memory= 2943.916 t= 968 R= 7e+04
-Depth= 9059 States= 6.7e+07 Transitions= 1.07e+09 Memory= 2978.975 t= 979 R= 7e+04
-Depth= 9059 States= 6.8e+07 Transitions= 1.09e+09 Memory= 3003.877 t= 996 R= 7e+04
-Depth= 9059 States= 6.9e+07 Transitions= 1.11e+09 Memory= 3028.584 t= 1.01e+03 R= 7e+04
-Depth= 9059 States= 7e+07 Transitions= 1.12e+09 Memory= 3058.174 t= 1.02e+03 R= 7e+04
-Depth= 9059 States= 7.1e+07 Transitions= 1.13e+09 Memory= 3088.350 t= 1.04e+03 R= 7e+04
-Depth= 9059 States= 7.2e+07 Transitions= 1.15e+09 Memory= 3113.350 t= 1.05e+03 R= 7e+04
-Depth= 9059 States= 7.3e+07 Transitions= 1.17e+09 Memory= 3142.158 t= 1.07e+03 R= 7e+04
-Depth= 9059 States= 7.4e+07 Transitions= 1.19e+09 Memory= 3166.279 t= 1.09e+03 R= 7e+04
-Depth= 9059 States= 7.5e+07 Transitions= 1.21e+09 Memory= 3192.744 t= 1.11e+03 R= 7e+04
-Depth= 9059 States= 7.6e+07 Transitions= 1.23e+09 Memory= 3217.256 t= 1.13e+03 R= 7e+04
-Depth= 9059 States= 7.7e+07 Transitions= 1.25e+09 Memory= 3242.549 t= 1.14e+03 R= 7e+04
-Depth= 9059 States= 7.8e+07 Transitions= 1.26e+09 Memory= 3273.115 t= 1.16e+03 R= 7e+04
-Depth= 9059 States= 7.9e+07 Transitions= 1.27e+09 Memory= 3303.975 t= 1.17e+03 R= 7e+04
-Depth= 9059 States= 8e+07 Transitions= 1.29e+09 Memory= 3334.541 t= 1.18e+03 R= 7e+04
-Depth= 9059 States= 8.1e+07 Transitions= 1.31e+09 Memory= 3356.221 t= 1.2e+03 R= 7e+04
-Depth= 9059 States= 8.2e+07 Transitions= 1.33e+09 Memory= 3385.127 t= 1.22e+03 R= 7e+04
-Depth= 9059 States= 8.3e+07 Transitions= 1.35e+09 Memory= 3412.959 t= 1.23e+03 R= 7e+04
-Depth= 9059 States= 8.4e+07 Transitions= 1.37e+09 Memory= 3438.936 t= 1.25e+03 R= 7e+04
-Depth= 9059 States= 8.5e+07 Transitions= 1.38e+09 Memory= 3471.455 t= 1.26e+03 R= 7e+04
-Depth= 9059 States= 8.6e+07 Transitions= 1.4e+09 Memory= 3498.115 t= 1.28e+03 R= 7e+04
-Depth= 9059 States= 8.7e+07 Transitions= 1.42e+09 Memory= 3519.014 t= 1.3e+03 R= 7e+04
-Depth= 9059 States= 8.8e+07 Transitions= 1.44e+09 Memory= 3546.162 t= 1.32e+03 R= 7e+04
-Depth= 9059 States= 8.9e+07 Transitions= 1.46e+09 Memory= 3567.842 t= 1.34e+03 R= 7e+04
-Depth= 9059 States= 9e+07 Transitions= 1.48e+09 Memory= 3598.799 t= 1.35e+03 R= 7e+04
-Depth= 9059 States= 9.1e+07 Transitions= 1.5e+09 Memory= 3622.920 t= 1.37e+03 R= 7e+04
-Depth= 9059 States= 9.2e+07 Transitions= 1.52e+09 Memory= 3648.701 t= 1.39e+03 R= 7e+04
-Depth= 9059 States= 9.3e+07 Transitions= 1.53e+09 Memory= 3676.045 t= 1.4e+03 R= 7e+04
-Depth= 9059 States= 9.4e+07 Transitions= 1.55e+09 Memory= 3702.412 t= 1.42e+03 R= 7e+04
-Depth= 9059 States= 9.5e+07 Transitions= 1.56e+09 Memory= 3735.713 t= 1.43e+03 R= 7e+04
-Depth= 9059 States= 9.6e+07 Transitions= 1.57e+09 Memory= 3764.522 t= 1.44e+03 R= 7e+04
-Depth= 9059 States= 9.7e+07 Transitions= 1.59e+09 Memory= 3790.693 t= 1.45e+03 R= 7e+04
-Depth= 9059 States= 9.8e+07 Transitions= 1.61e+09 Memory= 3817.940 t= 1.47e+03 R= 7e+04
-Depth= 9059 States= 9.9e+07 Transitions= 1.62e+09 Memory= 3845.283 t= 1.48e+03 R= 7e+04
-Depth= 9059 States= 1e+08 Transitions= 1.64e+09 Memory= 3873.213 t= 1.5e+03 R= 7e+04
-Depth= 9059 States= 1.01e+08 Transitions= 1.65e+09 Memory= 3897.920 t= 1.51e+03 R= 7e+04
-Depth= 9059 States= 1.02e+08 Transitions= 1.67e+09 Memory= 3926.631 t= 1.53e+03 R= 7e+04
-Depth= 9059 States= 1.03e+08 Transitions= 1.68e+09 Memory= 3952.315 t= 1.54e+03 R= 7e+04
-Depth= 9059 States= 1.04e+08 Transitions= 1.7e+09 Memory= 3981.026 t= 1.56e+03 R= 7e+04
-Depth= 9059 States= 1.05e+08 Transitions= 1.71e+09 Memory= 4010.029 t= 1.57e+03 R= 7e+04
-Depth= 9059 States= 1.06e+08 Transitions= 1.73e+09 Memory= 4038.838 t= 1.58e+03 R= 7e+04
-Depth= 9059 States= 1.07e+08 Transitions= 1.74e+09 Memory= 4070.381 t= 1.59e+03 R= 7e+04
-Depth= 9059 States= 1.08e+08 Transitions= 1.75e+09 Memory= 4099.385 t= 1.61e+03 R= 7e+04
-Depth= 9059 States= 1.09e+08 Transitions= 1.77e+09 Memory= 4126.338 t= 1.62e+03 R= 7e+04
-Depth= 9059 States= 1.1e+08 Transitions= 1.79e+09 Memory= 4151.924 t= 1.64e+03 R= 7e+04
-Depth= 9059 States= 1.11e+08 Transitions= 1.8e+09 Memory= 4187.276 t= 1.65e+03 R= 7e+04
-Depth= 9059 States= 1.12e+08 Transitions= 1.81e+09 Memory= 4214.326 t= 1.66e+03 R= 7e+04
-Depth= 9059 States= 1.13e+08 Transitions= 1.83e+09 Memory= 4237.471 t= 1.67e+03 R= 7e+04
-Depth= 9059 States= 1.14e+08 Transitions= 1.85e+09 Memory= 4261.104 t= 1.7e+03 R= 7e+04
-Depth= 9059 States= 1.15e+08 Transitions= 1.87e+09 Memory= 4286.690 t= 1.71e+03 R= 7e+04
-Depth= 9059 States= 1.16e+08 Transitions= 1.89e+09 Memory= 4314.619 t= 1.73e+03 R= 7e+04
-Depth= 9059 States= 1.17e+08 Transitions= 1.91e+09 Memory= 4341.768 t= 1.75e+03 R= 7e+04
-Depth= 9059 States= 1.18e+08 Transitions= 1.92e+09 Memory= 4375.166 t= 1.76e+03 R= 7e+04
-Depth= 9059 States= 1.19e+08 Transitions= 1.94e+09 Memory= 4401.338 t= 1.78e+03 R= 7e+04
-Depth= 9059 States= 1.2e+08 Transitions= 1.95e+09 Memory= 4426.436 t= 1.79e+03 R= 7e+04
-Depth= 9059 States= 1.21e+08 Transitions= 1.97e+09 Memory= 4456.807 t= 1.8e+03 R= 7e+04
-Depth= 9059 States= 1.22e+08 Transitions= 1.98e+09 Memory= 4486.592 t= 1.82e+03 R= 7e+04
-Depth= 9059 States= 1.23e+08 Transitions= 2e+09 Memory= 4511.787 t= 1.83e+03 R= 7e+04
-Depth= 9059 States= 1.24e+08 Transitions= 2.02e+09 Memory= 4540.108 t= 1.85e+03 R= 7e+04
-Depth= 9059 States= 1.25e+08 Transitions= 2.04e+09 Memory= 4564.033 t= 1.87e+03 R= 7e+04
-Depth= 9059 States= 1.26e+08 Transitions= 2.06e+09 Memory= 4591.865 t= 1.89e+03 R= 7e+04
-Depth= 9059 States= 1.27e+08 Transitions= 2.08e+09 Memory= 4615.889 t= 1.91e+03 R= 7e+04
-Depth= 9059 States= 1.28e+08 Transitions= 2.1e+09 Memory= 4640.303 t= 1.92e+03 R= 7e+04
-Depth= 9059 States= 1.29e+08 Transitions= 2.11e+09 Memory= 4670.479 t= 1.94e+03 R= 7e+04
-Depth= 9059 States= 1.3e+08 Transitions= 2.12e+09 Memory= 4702.998 t= 1.95e+03 R= 7e+04
-Depth= 9059 States= 1.31e+08 Transitions= 2.14e+09 Memory= 4732.393 t= 1.96e+03 R= 7e+04
-Depth= 9059 States= 1.32e+08 Transitions= 2.16e+09 Memory= 4754.756 t= 1.98e+03 R= 7e+04
-Depth= 9059 States= 1.33e+08 Transitions= 2.18e+09 Memory= 4783.174 t= 2e+03 R= 7e+04
-Depth= 9059 States= 1.34e+08 Transitions= 2.19e+09 Memory= 4810.518 t= 2.01e+03 R= 7e+04
-Depth= 9059 States= 1.35e+08 Transitions= 2.21e+09 Memory= 4837.568 t= 2.03e+03 R= 7e+04
-pan: resizing hashtable to -w28.. done
-Depth= 9059 States= 1.36e+08 Transitions= 2.23e+09 Memory= 6885.568 t= 2.06e+03 R= 7e+04
-Depth= 9059 States= 1.37e+08 Transitions= 2.24e+09 Memory= 6885.568 t= 2.08e+03 R= 7e+04
-Depth= 9059 States= 1.38e+08 Transitions= 2.27e+09 Memory= 6900.412 t= 2.1e+03 R= 7e+04
-Depth= 9059 States= 1.39e+08 Transitions= 2.29e+09 Memory= 6927.658 t= 2.12e+03 R= 7e+04
-Depth= 9059 States= 1.4e+08 Transitions= 2.31e+09 Memory= 6950.315 t= 2.14e+03 R= 7e+04
-Depth= 9059 States= 1.41e+08 Transitions= 2.33e+09 Memory= 6981.858 t= 2.15e+03 R= 7e+04
-Depth= 9059 States= 1.42e+08 Transitions= 2.35e+09 Memory= 7005.295 t= 2.17e+03 R= 7e+04
-Depth= 9059 States= 1.43e+08 Transitions= 2.36e+09 Memory= 7031.076 t= 2.18e+03 R= 7e+04
-Depth= 9059 States= 1.44e+08 Transitions= 2.38e+09 Memory= 7056.955 t= 2.2e+03 R= 7e+04
-Depth= 9059 States= 1.45e+08 Transitions= 2.4e+09 Memory= 7084.494 t= 2.22e+03 R= 7e+04
-Depth= 9059 States= 1.46e+08 Transitions= 2.41e+09 Memory= 7115.744 t= 2.23e+03 R= 7e+04
-Depth= 9059 States= 1.47e+08 Transitions= 2.42e+09 Memory= 7146.604 t= 2.24e+03 R= 7e+04
-Depth= 9059 States= 1.48e+08 Transitions= 2.44e+09 Memory= 7172.287 t= 2.25e+03 R= 7e+04
-Depth= 9059 States= 1.49e+08 Transitions= 2.45e+09 Memory= 7200.315 t= 2.26e+03 R= 7e+04
-Depth= 9059 States= 1.5e+08 Transitions= 2.47e+09 Memory= 7226.389 t= 2.28e+03 R= 7e+04
-Depth= 9059 States= 1.51e+08 Transitions= 2.48e+09 Memory= 7253.733 t= 2.29e+03 R= 7e+04
-Depth= 9059 States= 1.52e+08 Transitions= 2.5e+09 Memory= 7279.709 t= 2.31e+03 R= 7e+04
-Depth= 9059 States= 1.53e+08 Transitions= 2.52e+09 Memory= 7309.104 t= 2.32e+03 R= 7e+04
-Depth= 9059 States= 1.54e+08 Transitions= 2.53e+09 Memory= 7334.592 t= 2.34e+03 R= 7e+04
-Depth= 9059 States= 1.55e+08 Transitions= 2.55e+09 Memory= 7362.229 t= 2.35e+03 R= 7e+04
-Depth= 9059 States= 1.56e+08 Transitions= 2.56e+09 Memory= 7391.135 t= 2.36e+03 R= 7e+04
-Depth= 9059 States= 1.57e+08 Transitions= 2.57e+09 Memory= 7420.822 t= 2.38e+03 R= 7e+04
-Depth= 9059 States= 1.58e+08 Transitions= 2.59e+09 Memory= 7452.854 t= 2.39e+03 R= 7e+04
-Depth= 9059 States= 1.59e+08 Transitions= 2.6e+09 Memory= 7481.760 t= 2.4e+03 R= 7e+04
-Depth= 9059 States= 1.6e+08 Transitions= 2.62e+09 Memory= 7509.299 t= 2.41e+03 R= 7e+04
-Depth= 9059 States= 1.61e+08 Transitions= 2.63e+09 Memory= 7534.201 t= 2.43e+03 R= 7e+04
-Depth= 9059 States= 1.62e+08 Transitions= 2.65e+09 Memory= 7567.600 t= 2.44e+03 R= 7e+04
-Depth= 9059 States= 1.63e+08 Transitions= 2.66e+09 Memory= 7594.846 t= 2.45e+03 R= 7e+04
-Depth= 9059 States= 1.64e+08 Transitions= 2.67e+09 Memory= 7619.455 t= 2.47e+03 R= 7e+04
-Depth= 9059 States= 1.65e+08 Transitions= 2.7e+09 Memory= 7642.502 t= 2.49e+03 R= 7e+04
-Depth= 9059 States= 1.66e+08 Transitions= 2.72e+09 Memory= 7669.260 t= 2.51e+03 R= 7e+04
-Depth= 9059 States= 1.67e+08 Transitions= 2.73e+09 Memory= 7696.799 t= 2.52e+03 R= 7e+04
-Depth= 9059 States= 1.68e+08 Transitions= 2.75e+09 Memory= 7723.850 t= 2.54e+03 R= 7e+04
-Depth= 9059 States= 1.69e+08 Transitions= 2.77e+09 Memory= 7757.053 t= 2.55e+03 R= 7e+04
-Depth= 9059 States= 1.7e+08 Transitions= 2.78e+09 Memory= 7782.346 t= 2.57e+03 R= 7e+04
-Depth= 9059 States= 1.71e+08 Transitions= 2.8e+09 Memory= 7808.908 t= 2.58e+03 R= 7e+04
-Depth= 9059 States= 1.72e+08 Transitions= 2.81e+09 Memory= 7838.791 t= 2.59e+03 R= 7e+04
-Depth= 9059 States= 1.73e+08 Transitions= 2.83e+09 Memory= 7867.893 t= 2.61e+03 R= 7e+04
-Depth= 9059 States= 1.74e+08 Transitions= 2.85e+09 Memory= 7892.990 t= 2.62e+03 R= 7e+04
-Depth= 9059 States= 1.75e+08 Transitions= 2.86e+09 Memory= 7922.190 t= 2.64e+03 R= 7e+04
-Depth= 9059 States= 1.76e+08 Transitions= 2.89e+09 Memory= 7945.627 t= 2.66e+03 R= 7e+04
-Depth= 9059 States= 1.77e+08 Transitions= 2.9e+09 Memory= 7973.947 t= 2.68e+03 R= 7e+04
-Depth= 9059 States= 1.78e+08 Transitions= 2.93e+09 Memory= 7997.483 t= 2.7e+03 R= 7e+04
-Depth= 9059 States= 1.79e+08 Transitions= 2.94e+09 Memory= 8020.920 t= 2.71e+03 R= 7e+04
-Depth= 9059 States= 1.8e+08 Transitions= 2.96e+09 Memory= 8050.412 t= 2.73e+03 R= 7e+04
-Depth= 9059 States= 1.81e+08 Transitions= 2.97e+09 Memory= 8085.666 t= 2.74e+03 R= 7e+04
-Depth= 9059 States= 1.82e+08 Transitions= 2.98e+09 Memory= 8114.279 t= 2.75e+03 R= 7e+04
-Depth= 9059 States= 1.83e+08 Transitions= 3e+09 Memory= 8137.131 t= 2.77e+03 R= 7e+04
-Depth= 9059 States= 1.84e+08 Transitions= 3.02e+09 Memory= 8165.451 t= 2.79e+03 R= 7e+04
-Depth= 9059 States= 1.85e+08 Transitions= 3.04e+09 Memory= 8193.186 t= 2.8e+03 R= 7e+04
-Depth= 9059 States= 1.86e+08 Transitions= 3.06e+09 Memory= 8218.674 t= 2.82e+03 R= 7e+04
-Depth= 9059 States= 1.87e+08 Transitions= 3.08e+09 Memory= 8255.100 t= 2.83e+03 R= 7e+04
-Depth= 9059 States= 1.88e+08 Transitions= 3.09e+09 Memory= 8279.221 t= 2.85e+03 R= 7e+04
-Depth= 9059 States= 1.89e+08 Transitions= 3.12e+09 Memory= 8298.264 t= 2.87e+03 R= 7e+04
-Depth= 9059 States= 1.9e+08 Transitions= 3.14e+09 Memory= 8325.998 t= 2.89e+03 R= 7e+04
-Depth= 9059 States= 1.91e+08 Transitions= 3.16e+09 Memory= 8349.338 t= 2.91e+03 R= 7e+04
-Depth= 9059 States= 1.92e+08 Transitions= 3.17e+09 Memory= 8379.221 t= 2.92e+03 R= 7e+04
-Depth= 9059 States= 1.93e+08 Transitions= 3.19e+09 Memory= 8403.440 t= 2.94e+03 R= 7e+04
-Depth= 9059 States= 1.94e+08 Transitions= 3.21e+09 Memory= 8430.100 t= 2.96e+03 R= 7e+04
-Depth= 9059 States= 1.95e+08 Transitions= 3.23e+09 Memory= 8455.295 t= 2.97e+03 R= 7e+04
-Depth= 9059 States= 1.96e+08 Transitions= 3.25e+09 Memory= 8482.932 t= 2.99e+03 R= 7e+04
-Depth= 9059 States= 1.97e+08 Transitions= 3.26e+09 Memory= 8515.256 t= 3e+03 R= 7e+04
-Depth= 9059 States= 1.98e+08 Transitions= 3.27e+09 Memory= 8542.502 t= 3.01e+03 R= 7e+04
-Depth= 9059 States= 1.99e+08 Transitions= 3.29e+09 Memory= 8569.260 t= 3.02e+03 R= 7e+04
-Depth= 9059 States= 2e+08 Transitions= 3.3e+09 Memory= 8598.459 t= 3.04e+03 R= 7e+04
-Depth= 9059 States= 2.01e+08 Transitions= 3.32e+09 Memory= 8624.631 t= 3.05e+03 R= 7e+04
-Depth= 9059 States= 2.02e+08 Transitions= 3.33e+09 Memory= 8652.365 t= 3.07e+03 R= 7e+04
-Depth= 9059 States= 2.03e+08 Transitions= 3.35e+09 Memory= 8678.440 t= 3.08e+03 R= 7e+04
-Depth= 9059 States= 2.04e+08 Transitions= 3.36e+09 Memory= 8706.369 t= 3.1e+03 R= 7e+04
-Depth= 9059 States= 2.05e+08 Transitions= 3.38e+09 Memory= 8732.932 t= 3.11e+03 R= 7e+04
-Depth= 9059 States= 2.06e+08 Transitions= 3.39e+09 Memory= 8760.276 t= 3.12e+03 R= 7e+04
-Depth= 9059 States= 2.07e+08 Transitions= 3.41e+09 Memory= 8789.475 t= 3.14e+03 R= 7e+04
-Depth= 9059 States= 2.08e+08 Transitions= 3.42e+09 Memory= 8819.455 t= 3.15e+03 R= 7e+04
-Depth= 9059 States= 2.09e+08 Transitions= 3.43e+09 Memory= 8851.779 t= 3.16e+03 R= 7e+04
-Depth= 9059 States= 2.1e+08 Transitions= 3.45e+09 Memory= 8880.100 t= 3.17e+03 R= 7e+04
-Depth= 9059 States= 2.11e+08 Transitions= 3.46e+09 Memory= 8907.053 t= 3.19e+03 R= 7e+04
-Depth= 9059 States= 2.12e+08 Transitions= 3.48e+09 Memory= 8932.639 t= 3.2e+03 R= 7e+04
-Depth= 9059 States= 2.13e+08 Transitions= 3.49e+09 Memory= 8964.572 t= 3.22e+03 R= 7e+04
-Depth= 9059 States= 2.14e+08 Transitions= 3.51e+09 Memory= 8991.526 t= 3.23e+03 R= 7e+04
-Depth= 9059 States= 2.15e+08 Transitions= 3.52e+09 Memory= 9018.088 t= 3.24e+03 R= 7e+04
-Depth= 9059 States= 2.16e+08 Transitions= 3.54e+09 Memory= 9039.865 t= 3.26e+03 R= 7e+04
-Depth= 9059 States= 2.17e+08 Transitions= 3.56e+09 Memory= 9067.600 t= 3.28e+03 R= 7e+04
-Depth= 9059 States= 2.18e+08 Transitions= 3.58e+09 Memory= 9094.260 t= 3.3e+03 R= 7e+04
-Depth= 9059 States= 2.19e+08 Transitions= 3.6e+09 Memory= 9122.483 t= 3.31e+03 R= 7e+04
-Depth= 9059 States= 2.2e+08 Transitions= 3.61e+09 Memory= 9153.635 t= 3.32e+03 R= 7e+04
-Depth= 9059 States= 2.21e+08 Transitions= 3.63e+09 Memory= 9181.272 t= 3.34e+03 R= 7e+04
-Depth= 9059 States= 2.22e+08 Transitions= 3.65e+09 Memory= 9207.639 t= 3.36e+03 R= 7e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 9059, errors: 0
- 88961904 states, stored (2.22145e+08 visited)
-3.4291111e+09 states, matched
-3.6512561e+09 transitions (= visited+matched)
-1.2885947e+10 atomic steps
-hash conflicts: 7.2188776e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7805.343 equivalent memory usage for states (stored*(State-vector + overhead))
- 6706.219 actual memory usage for states (compression: 85.92%)
- state-vector as stored = 51 byte + 28 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.122 memory lost to fragmentation
- 9210.861 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.36e+03 seconds
-pan: rate 66138.803 states/second
-pan: avg transition delay 9.1989e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4401
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-3:4:4356
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-736:3:2531
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-738:3:2543
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-749:0:4401
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-759:3:2614
-760:3:2625
-761:3:2626
-762:3:2637
-763:3:2638
-764:3:2639
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-766:3:2655
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-785:3:2708
-786:3:2709
-787:3:2714
-788:3:2721
-789:3:2722
-790:3:2729
-791:3:2734
-792:0:4401
-793:3:2745
-794:0:4401
-795:3:2749
-796:3:2750
-797:3:2754
-798:3:2758
-799:3:2759
-800:3:2763
-801:3:2771
-802:3:2772
-803:3:2777
-804:3:2784
-805:3:2785
-806:3:2792
-807:3:2797
-808:0:4401
-809:3:2808
-810:0:4401
-811:3:2816
-812:3:2817
-813:3:2821
-814:3:2825
-815:3:2826
-816:3:2830
-817:3:2838
-818:3:2839
-819:3:2844
-820:3:2851
-821:3:2852
-822:3:2859
-823:3:2864
-824:0:4401
-825:3:2879
-826:0:4401
-827:3:2881
-828:0:4401
-829:3:2882
-830:3:2886
-831:3:2887
-832:3:2895
-833:3:2896
-834:3:2900
-835:3:2901
-836:3:2909
-837:3:2914
-838:3:2918
-839:3:2919
-840:3:2926
-841:3:2927
-842:3:2938
-843:3:2939
-844:3:2940
-845:3:2951
-846:3:2956
-847:3:2957
-848:0:4401
-849:3:2969
-850:0:4401
-851:3:2971
-852:0:4401
-853:3:2974
-854:3:2975
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-856:3:2988
-857:3:2992
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-867:3:3032
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-869:3:3048
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-890:3:3099
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-905:0:4401
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-914:3:3470
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-933:0:4401
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-1018:0:4401
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-1042:3:4219
-1043:3:4227
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-1050:0:4401
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-1063:3:4308
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-1068:0:4401
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-1092:0:4401
-1093:2:1245
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-1096:0:4401
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-1104:0:4401
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-1108:0:4401
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-1127:3:4347
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-1142:0:4401
-1143:3:4347
-1144:0:4401
-1145:1:15
-1146:0:4401
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-1148:0:4401
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-1151:3:4347
-1152:0:4401
-1153:1:16
-1154:1:20
-1155:1:21
-1156:1:29
-1157:1:30
-1158:1:34
-1159:1:35
-1160:1:43
-1161:1:48
-1162:1:52
-1163:1:53
-1164:1:60
-1165:1:61
-1166:1:72
-1167:1:73
-1168:1:74
-1169:1:85
-1170:1:90
-1171:1:91
-1172:0:4401
-1173:3:4346
-1174:0:4401
-1175:2:1245
-1176:0:4401
-1177:3:4347
-1178:0:4401
-1179:1:103
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-1181:3:4346
-1182:0:4401
-1183:2:1246
-1184:0:4401
-1185:3:4347
-1186:0:4401
-1187:2:1247
-1188:0:4401
-1189:3:4346
-1190:0:4401
-1191:2:1253
-1192:0:4401
-1193:3:4347
-1194:0:4401
-1195:2:1254
-1196:0:4399
-1197:3:4346
-1198:0:4405
-1199:3:4347
-1200:0:4405
-1201:2:1257
-1202:0:4405
-1203:3:4346
-1204:0:4405
-1205:2:1258
-1206:0:4405
-1207:3:4347
-1208:0:4405
-1209:2:1259
-1210:2:1263
-1211:2:1264
-1212:2:1272
-1213:2:1273
-1214:2:1277
-1215:2:1278
-1216:2:1286
-1217:2:1291
-1218:2:1295
-1219:2:1296
-1220:2:1303
-1221:2:1304
-1222:2:1315
-1223:2:1316
-1224:2:1317
-1225:2:1328
-1226:2:1333
-1227:2:1334
-1228:0:4405
-1229:3:4346
-1230:0:4405
-1231:2:1346
-1232:0:4405
-1233:3:4347
-1234:0:4405
-1235:2:1347
-1236:0:4405
-1237:3:4346
-1238:0:4405
-1239:1:104
--1:-1:-1
-1240:0:4405
-1241:3:4347
-1242:0:4405
-1243:3:4346
-1244:0:4405
-1245:2:1348
-1246:0:4405
-1247:3:4347
-1248:0:4405
-1249:2:1347
-1250:0:4405
-1251:3:4346
-1252:0:4405
-1253:1:105
-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1194: Claim reached state 9 (line 748)
-Depth= 3253 States= 1e+06 Transitions= 1.06e+07 Memory= 484.416 t= 9.64 R= 1e+05
-Depth= 3253 States= 2e+06 Transitions= 2.04e+07 Memory= 501.311 t= 18.6 R= 1e+05
-Depth= 3253 States= 3e+06 Transitions= 3.44e+07 Memory= 516.252 t= 31.6 R= 9e+04
-pan: resizing hashtable to -w22.. done
-Depth= 7995 States= 4e+06 Transitions= 4.66e+07 Memory= 563.486 t= 42.8 R= 9e+04
-Depth= 7995 States= 5e+06 Transitions= 6.05e+07 Memory= 580.674 t= 55.6 R= 9e+04
-Depth= 7995 States= 6e+06 Transitions= 7.12e+07 Memory= 599.229 t= 65.5 R= 9e+04
-Depth= 7995 States= 7e+06 Transitions= 8.58e+07 Memory= 613.975 t= 78.9 R= 9e+04
-Depth= 7995 States= 8e+06 Transitions= 9.62e+07 Memory= 631.846 t= 88.7 R= 9e+04
-Depth= 7995 States= 9e+06 Transitions= 1.1e+08 Memory= 646.592 t= 101 R= 9e+04
-pan: resizing hashtable to -w24.. done
-Depth= 7995 States= 1e+07 Transitions= 1.32e+08 Memory= 783.869 t= 122 R= 8e+04
-Depth= 7995 States= 1.1e+07 Transitions= 1.52e+08 Memory= 799.104 t= 140 R= 8e+04
-Depth= 7995 States= 1.2e+07 Transitions= 1.71e+08 Memory= 814.533 t= 157 R= 8e+04
-Depth= 7995 States= 1.3e+07 Transitions= 1.9e+08 Memory= 829.670 t= 174 R= 7e+04
-Depth= 7995 States= 1.4e+07 Transitions= 2.01e+08 Memory= 848.029 t= 185 R= 8e+04
-Depth= 7995 States= 1.5e+07 Transitions= 2.21e+08 Memory= 862.287 t= 203 R= 7e+04
-Depth= 7995 States= 1.6e+07 Transitions= 2.35e+08 Memory= 877.815 t= 215 R= 7e+04
-Depth= 7995 States= 1.7e+07 Transitions= 2.44e+08 Memory= 897.736 t= 223 R= 8e+04
-Depth= 7995 States= 1.8e+07 Transitions= 2.57e+08 Memory= 911.115 t= 235 R= 8e+04
-Depth= 7995 States= 1.9e+07 Transitions= 2.69e+08 Memory= 927.033 t= 246 R= 8e+04
-Depth= 8341 States= 2e+07 Transitions= 2.83e+08 Memory= 943.440 t= 259 R= 8e+04
-Depth= 8341 States= 2.1e+07 Transitions= 2.96e+08 Memory= 961.604 t= 271 R= 8e+04
-Depth= 8341 States= 2.2e+07 Transitions= 3.07e+08 Memory= 978.791 t= 281 R= 8e+04
-Depth= 8341 States= 2.3e+07 Transitions= 3.2e+08 Memory= 996.369 t= 293 R= 8e+04
-Depth= 8341 States= 2.4e+07 Transitions= 3.32e+08 Memory= 1013.264 t= 304 R= 8e+04
-Depth= 8341 States= 2.5e+07 Transitions= 3.48e+08 Memory= 1024.885 t= 319 R= 8e+04
-Depth= 8341 States= 2.6e+07 Transitions= 3.72e+08 Memory= 1038.947 t= 341 R= 8e+04
-Depth= 8341 States= 2.7e+07 Transitions= 3.91e+08 Memory= 1055.158 t= 358 R= 8e+04
-Depth= 8341 States= 2.8e+07 Transitions= 4.09e+08 Memory= 1069.904 t= 374 R= 7e+04
-Depth= 8341 States= 2.9e+07 Transitions= 4.25e+08 Memory= 1086.701 t= 389 R= 7e+04
-Depth= 8341 States= 3e+07 Transitions= 4.43e+08 Memory= 1102.131 t= 405 R= 7e+04
-Depth= 8341 States= 3.1e+07 Transitions= 4.58e+08 Memory= 1117.268 t= 419 R= 7e+04
-Depth= 8341 States= 3.2e+07 Transitions= 4.68e+08 Memory= 1136.213 t= 429 R= 7e+04
-Depth= 8341 States= 3.3e+07 Transitions= 4.8e+08 Memory= 1151.154 t= 440 R= 8e+04
-Depth= 8341 States= 3.4e+07 Transitions= 4.92e+08 Memory= 1166.779 t= 451 R= 8e+04
-pan: resizing hashtable to -w26.. done
-Depth= 8687 States= 3.5e+07 Transitions= 5.05e+08 Memory= 1679.658 t= 464 R= 8e+04
-Depth= 8687 States= 3.6e+07 Transitions= 5.18e+08 Memory= 1697.432 t= 477 R= 8e+04
-Depth= 8687 States= 3.7e+07 Transitions= 5.29e+08 Memory= 1714.326 t= 487 R= 8e+04
-Depth= 8687 States= 3.8e+07 Transitions= 5.44e+08 Memory= 1730.244 t= 500 R= 8e+04
-Depth= 8687 States= 3.9e+07 Transitions= 5.55e+08 Memory= 1747.920 t= 511 R= 8e+04
-Depth= 8687 States= 4e+07 Transitions= 5.69e+08 Memory= 1761.885 t= 523 R= 8e+04
-Depth= 8687 States= 4.1e+07 Transitions= 5.92e+08 Memory= 1775.850 t= 544 R= 8e+04
-Depth= 8687 States= 4.2e+07 Transitions= 6.12e+08 Memory= 1790.498 t= 562 R= 7e+04
-Depth= 8687 States= 4.3e+07 Transitions= 6.29e+08 Memory= 1807.783 t= 578 R= 7e+04
-Depth= 8687 States= 4.4e+07 Transitions= 6.48e+08 Memory= 1822.432 t= 595 R= 7e+04
-Depth= 8687 States= 4.5e+07 Transitions= 6.61e+08 Memory= 1838.838 t= 606 R= 7e+04
-Depth= 8687 States= 4.6e+07 Transitions= 6.81e+08 Memory= 1853.291 t= 625 R= 7e+04
-Depth= 8687 States= 4.7e+07 Transitions= 6.93e+08 Memory= 1870.772 t= 635 R= 7e+04
-Depth= 8687 States= 4.8e+07 Transitions= 7.02e+08 Memory= 1889.912 t= 644 R= 7e+04
-Depth= 8687 States= 4.9e+07 Transitions= 7.15e+08 Memory= 1902.998 t= 656 R= 7e+04
-Depth= 8687 States= 5e+07 Transitions= 7.27e+08 Memory= 1919.600 t= 667 R= 7e+04
-Depth= 9033 States= 5.1e+07 Transitions= 7.42e+08 Memory= 1935.518 t= 681 R= 7e+04
-Depth= 9033 States= 5.2e+07 Transitions= 7.53e+08 Memory= 1954.170 t= 691 R= 8e+04
-Depth= 9033 States= 5.3e+07 Transitions= 7.66e+08 Memory= 1969.990 t= 703 R= 8e+04
-Depth= 9033 States= 5.4e+07 Transitions= 7.77e+08 Memory= 1988.545 t= 713 R= 8e+04
-Depth= 9033 States= 5.5e+07 Transitions= 7.9e+08 Memory= 2004.756 t= 725 R= 8e+04
-Depth= 9033 States= 5.6e+07 Transitions= 8.1e+08 Memory= 2016.084 t= 743 R= 8e+04
-Depth= 9033 States= 5.7e+07 Transitions= 8.32e+08 Memory= 2030.440 t= 763 R= 7e+04
-Depth= 9033 States= 5.8e+07 Transitions= 8.51e+08 Memory= 2046.260 t= 781 R= 7e+04
-Depth= 9033 States= 5.9e+07 Transitions= 8.7e+08 Memory= 2061.592 t= 797 R= 7e+04
-Depth= 9033 States= 6e+07 Transitions= 8.83e+08 Memory= 2078.779 t= 809 R= 7e+04
-Depth= 9033 States= 6.1e+07 Transitions= 9.01e+08 Memory= 2094.014 t= 826 R= 7e+04
-Depth= 9033 States= 6.2e+07 Transitions= 9.16e+08 Memory= 2108.467 t= 840 R= 7e+04
-Depth= 9033 States= 6.3e+07 Transitions= 9.26e+08 Memory= 2126.924 t= 849 R= 7e+04
-Depth= 9033 States= 6.4e+07 Transitions= 9.38e+08 Memory= 2142.158 t= 860 R= 7e+04
-Depth= 9033 States= 6.5e+07 Transitions= 9.51e+08 Memory= 2157.295 t= 871 R= 7e+04
-Depth= 9379 States= 6.6e+07 Transitions= 9.63e+08 Memory= 2173.115 t= 883 R= 7e+04
-Depth= 9379 States= 6.7e+07 Transitions= 9.77e+08 Memory= 2190.401 t= 895 R= 7e+04
-Depth= 9379 States= 6.8e+07 Transitions= 9.88e+08 Memory= 2208.955 t= 905 R= 8e+04
-Depth= 9379 States= 6.9e+07 Transitions= 1e+09 Memory= 2223.311 t= 919 R= 8e+04
-Depth= 9379 States= 7e+07 Transitions= 1.01e+09 Memory= 2242.256 t= 928 R= 8e+04
-Depth= 9379 States= 7.1e+07 Transitions= 1.03e+09 Memory= 2257.295 t= 940 R= 8e+04
-Depth= 9379 States= 7.2e+07 Transitions= 1.05e+09 Memory= 2269.307 t= 960 R= 8e+04
-Depth= 9379 States= 7.3e+07 Transitions= 1.07e+09 Memory= 2283.760 t= 979 R= 7e+04
-Depth= 9379 States= 7.4e+07 Transitions= 1.09e+09 Memory= 2299.385 t= 996 R= 7e+04
-Depth= 9379 States= 7.5e+07 Transitions= 1.11e+09 Memory= 2314.619 t= 1.01e+03 R= 7e+04
-Depth= 9379 States= 7.6e+07 Transitions= 1.12e+09 Memory= 2333.369 t= 1.02e+03 R= 7e+04
-Depth= 9379 States= 7.7e+07 Transitions= 1.14e+09 Memory= 2347.139 t= 1.04e+03 R= 7e+04
-Depth= 9379 States= 7.8e+07 Transitions= 1.15e+09 Memory= 2385.029 t= 1.06e+03 R= 7e+04
-Depth= 9379 States= 7.9e+07 Transitions= 1.17e+09 Memory= 2453.682 t= 1.07e+03 R= 7e+04
-Depth= 9379 States= 8e+07 Transitions= 1.18e+09 Memory= 2522.236 t= 1.08e+03 R= 7e+04
-Depth= 9379 States= 8.1e+07 Transitions= 1.2e+09 Memory= 2590.889 t= 1.1e+03 R= 7e+04
-Depth= 9379 States= 8.2e+07 Transitions= 1.22e+09 Memory= 2624.287 t= 1.12e+03 R= 7e+04
-Depth= 9379 States= 8.3e+07 Transitions= 1.23e+09 Memory= 2640.303 t= 1.13e+03 R= 7e+04
-Depth= 9379 States= 8.4e+07 Transitions= 1.25e+09 Memory= 2654.170 t= 1.15e+03 R= 7e+04
-Depth= 9379 States= 8.5e+07 Transitions= 1.27e+09 Memory= 2669.111 t= 1.16e+03 R= 7e+04
-Depth= 9379 States= 8.6e+07 Transitions= 1.29e+09 Memory= 2684.053 t= 1.18e+03 R= 7e+04
-Depth= 9379 States= 8.7e+07 Transitions= 1.31e+09 Memory= 2698.604 t= 1.2e+03 R= 7e+04
-Depth= 9379 States= 8.8e+07 Transitions= 1.33e+09 Memory= 2719.697 t= 1.22e+03 R= 7e+04
-Depth= 9379 States= 8.9e+07 Transitions= 1.35e+09 Memory= 2788.350 t= 1.24e+03 R= 7e+04
-Depth= 9379 States= 9e+07 Transitions= 1.37e+09 Memory= 2819.990 t= 1.26e+03 R= 7e+04
-Depth= 9379 States= 9.1e+07 Transitions= 1.39e+09 Memory= 2846.553 t= 1.27e+03 R= 7e+04
-Depth= 9379 States= 9.2e+07 Transitions= 1.4e+09 Memory= 2864.912 t= 1.28e+03 R= 7e+04
-Depth= 9379 States= 9.3e+07 Transitions= 1.41e+09 Memory= 2877.901 t= 1.3e+03 R= 7e+04
-Depth= 9379 States= 9.4e+07 Transitions= 1.44e+09 Memory= 2892.842 t= 1.31e+03 R= 7e+04
-Depth= 9379 States= 9.5e+07 Transitions= 1.45e+09 Memory= 2908.076 t= 1.33e+03 R= 7e+04
-Depth= 9379 States= 9.6e+07 Transitions= 1.47e+09 Memory= 2922.627 t= 1.35e+03 R= 7e+04
-Depth= 9379 States= 9.7e+07 Transitions= 1.49e+09 Memory= 2940.693 t= 1.36e+03 R= 7e+04
-Depth= 9379 States= 9.8e+07 Transitions= 1.51e+09 Memory= 2953.291 t= 1.38e+03 R= 7e+04
-Depth= 9379 States= 9.9e+07 Transitions= 1.53e+09 Memory= 2968.526 t= 1.4e+03 R= 7e+04
-Depth= 9379 States= 1e+08 Transitions= 1.56e+09 Memory= 2981.709 t= 1.42e+03 R= 7e+04
-Depth= 9379 States= 1.01e+08 Transitions= 1.57e+09 Memory= 2997.236 t= 1.44e+03 R= 7e+04
-Depth= 9379 States= 1.02e+08 Transitions= 1.59e+09 Memory= 3011.592 t= 1.46e+03 R= 7e+04
-Depth= 9379 States= 1.03e+08 Transitions= 1.61e+09 Memory= 3037.861 t= 1.47e+03 R= 7e+04
-Depth= 9379 States= 1.04e+08 Transitions= 1.63e+09 Memory= 3106.514 t= 1.49e+03 R= 7e+04
-Depth= 9379 States= 1.05e+08 Transitions= 1.65e+09 Memory= 3175.166 t= 1.51e+03 R= 7e+04
-Depth= 9379 States= 1.06e+08 Transitions= 1.67e+09 Memory= 3223.897 t= 1.52e+03 R= 7e+04
-Depth= 9379 States= 1.07e+08 Transitions= 1.68e+09 Memory= 3246.846 t= 1.54e+03 R= 7e+04
-Depth= 9379 States= 1.08e+08 Transitions= 1.7e+09 Memory= 3283.467 t= 1.56e+03 R= 7e+04
-Depth= 9379 States= 1.09e+08 Transitions= 1.72e+09 Memory= 3316.670 t= 1.57e+03 R= 7e+04
-Depth= 9379 States= 1.1e+08 Transitions= 1.73e+09 Memory= 3344.209 t= 1.59e+03 R= 7e+04
-Depth= 9379 States= 1.11e+08 Transitions= 1.75e+09 Memory= 3376.338 t= 1.6e+03 R= 7e+04
-Depth= 9379 States= 1.12e+08 Transitions= 1.76e+09 Memory= 3396.943 t= 1.62e+03 R= 7e+04
-Depth= 9379 States= 1.13e+08 Transitions= 1.78e+09 Memory= 3426.143 t= 1.63e+03 R= 7e+04
-Depth= 9379 States= 1.14e+08 Transitions= 1.8e+09 Memory= 3452.705 t= 1.65e+03 R= 7e+04
-Depth= 9379 States= 1.15e+08 Transitions= 1.81e+09 Memory= 3493.818 t= 1.66e+03 R= 7e+04
-Depth= 9379 States= 1.16e+08 Transitions= 1.83e+09 Memory= 3533.369 t= 1.67e+03 R= 7e+04
-Depth= 9379 States= 1.17e+08 Transitions= 1.84e+09 Memory= 3566.182 t= 1.69e+03 R= 7e+04
-Depth= 9379 States= 1.18e+08 Transitions= 1.86e+09 Memory= 3582.881 t= 1.7e+03 R= 7e+04
-Depth= 9379 States= 1.19e+08 Transitions= 1.88e+09 Memory= 3630.830 t= 1.72e+03 R= 7e+04
-Depth= 9379 States= 1.2e+08 Transitions= 1.89e+09 Memory= 3692.744 t= 1.74e+03 R= 7e+04
-Depth= 9379 States= 1.21e+08 Transitions= 1.91e+09 Memory= 3750.361 t= 1.75e+03 R= 7e+04
-Depth= 9379 States= 1.22e+08 Transitions= 1.92e+09 Memory= 3767.354 t= 1.76e+03 R= 7e+04
-Depth= 9379 States= 1.23e+08 Transitions= 1.94e+09 Memory= 3781.904 t= 1.78e+03 R= 7e+04
-Depth= 9379 States= 1.24e+08 Transitions= 1.96e+09 Memory= 3797.529 t= 1.8e+03 R= 7e+04
-Depth= 9379 States= 1.25e+08 Transitions= 1.98e+09 Memory= 3810.908 t= 1.82e+03 R= 7e+04
-Depth= 9379 States= 1.26e+08 Transitions= 2e+09 Memory= 3826.143 t= 1.83e+03 R= 7e+04
-Depth= 9379 States= 1.27e+08 Transitions= 2.02e+09 Memory= 3839.717 t= 1.86e+03 R= 7e+04
-Depth= 9379 States= 1.28e+08 Transitions= 2.04e+09 Memory= 3881.709 t= 1.87e+03 R= 7e+04
-Depth= 9379 States= 1.29e+08 Transitions= 2.06e+09 Memory= 3946.553 t= 1.89e+03 R= 7e+04
-Depth= 9379 States= 1.3e+08 Transitions= 2.08e+09 Memory= 3970.479 t= 1.91e+03 R= 7e+04
-Depth= 9379 States= 1.31e+08 Transitions= 2.09e+09 Memory= 3991.768 t= 1.92e+03 R= 7e+04
-Depth= 9379 States= 1.32e+08 Transitions= 2.1e+09 Memory= 4007.490 t= 1.93e+03 R= 7e+04
-Depth= 9379 States= 1.33e+08 Transitions= 2.13e+09 Memory= 4020.772 t= 1.95e+03 R= 7e+04
-Depth= 9379 States= 1.34e+08 Transitions= 2.14e+09 Memory= 4036.201 t= 1.97e+03 R= 7e+04
-Depth= 9379 States= 1.35e+08 Transitions= 2.16e+09 Memory= 4051.924 t= 1.98e+03 R= 7e+04
-pan: resizing hashtable to -w28.. done
-Depth= 9379 States= 1.36e+08 Transitions= 2.18e+09 Memory= 6099.924 t= 2.02e+03 R= 7e+04
-Depth= 9379 States= 1.37e+08 Transitions= 2.2e+09 Memory= 6099.924 t= 2.03e+03 R= 7e+04
-Depth= 9379 States= 1.38e+08 Transitions= 2.22e+09 Memory= 6099.924 t= 2.05e+03 R= 7e+04
-Depth= 9379 States= 1.39e+08 Transitions= 2.24e+09 Memory= 6099.924 t= 2.07e+03 R= 7e+04
-Depth= 9379 States= 1.4e+08 Transitions= 2.26e+09 Memory= 6108.518 t= 2.09e+03 R= 7e+04
-Depth= 9379 States= 1.41e+08 Transitions= 2.28e+09 Memory= 6124.729 t= 2.1e+03 R= 7e+04
-Depth= 9379 States= 1.42e+08 Transitions= 2.3e+09 Memory= 6138.889 t= 2.12e+03 R= 7e+04
-Depth= 9379 States= 1.43e+08 Transitions= 2.31e+09 Memory= 6178.928 t= 2.13e+03 R= 7e+04
-Depth= 9379 States= 1.44e+08 Transitions= 2.33e+09 Memory= 6247.483 t= 2.15e+03 R= 7e+04
-Depth= 9379 States= 1.45e+08 Transitions= 2.35e+09 Memory= 6316.135 t= 2.17e+03 R= 7e+04
-Depth= 9379 States= 1.46e+08 Transitions= 2.37e+09 Memory= 6353.440 t= 2.19e+03 R= 7e+04
-Depth= 9379 States= 1.47e+08 Transitions= 2.39e+09 Memory= 6381.662 t= 2.21e+03 R= 7e+04
-Depth= 9379 States= 1.48e+08 Transitions= 2.41e+09 Memory= 6422.190 t= 2.22e+03 R= 7e+04
-Depth= 9379 States= 1.49e+08 Transitions= 2.42e+09 Memory= 6449.143 t= 2.23e+03 R= 7e+04
-Depth= 9379 States= 1.5e+08 Transitions= 2.44e+09 Memory= 6472.580 t= 2.25e+03 R= 7e+04
-Depth= 9379 States= 1.51e+08 Transitions= 2.45e+09 Memory= 6503.733 t= 2.26e+03 R= 7e+04
-Depth= 9379 States= 1.52e+08 Transitions= 2.47e+09 Memory= 6531.369 t= 2.28e+03 R= 7e+04
-Depth= 9379 States= 1.53e+08 Transitions= 2.49e+09 Memory= 6554.123 t= 2.29e+03 R= 7e+04
-Depth= 9379 States= 1.54e+08 Transitions= 2.5e+09 Memory= 6585.373 t= 2.31e+03 R= 7e+04
-Depth= 9379 States= 1.55e+08 Transitions= 2.52e+09 Memory= 6622.776 t= 2.32e+03 R= 7e+04
-Depth= 9379 States= 1.56e+08 Transitions= 2.54e+09 Memory= 6671.213 t= 2.34e+03 R= 7e+04
-Depth= 9379 States= 1.57e+08 Transitions= 2.55e+09 Memory= 6696.115 t= 2.35e+03 R= 7e+04
-Depth= 9379 States= 1.58e+08 Transitions= 2.57e+09 Memory= 6722.776 t= 2.37e+03 R= 7e+04
-Depth= 9379 States= 1.59e+08 Transitions= 2.58e+09 Memory= 6764.572 t= 2.38e+03 R= 7e+04
-Depth= 9379 States= 1.6e+08 Transitions= 2.6e+09 Memory= 6830.490 t= 2.4e+03 R= 7e+04
-Depth= 9379 States= 1.61e+08 Transitions= 2.62e+09 Memory= 6879.026 t= 2.41e+03 R= 7e+04
-Depth= 9379 States= 1.62e+08 Transitions= 2.63e+09 Memory= 6895.432 t= 2.42e+03 R= 7e+04
-Depth= 9379 States= 1.63e+08 Transitions= 2.65e+09 Memory= 6909.787 t= 2.44e+03 R= 7e+04
-Depth= 9379 States= 1.64e+08 Transitions= 2.67e+09 Memory= 6925.217 t= 2.46e+03 R= 7e+04
-Depth= 9379 States= 1.65e+08 Transitions= 2.69e+09 Memory= 6938.986 t= 2.48e+03 R= 7e+04
-Depth= 9379 States= 1.66e+08 Transitions= 2.71e+09 Memory= 6953.537 t= 2.5e+03 R= 7e+04
-Depth= 9379 States= 1.67e+08 Transitions= 2.73e+09 Memory= 6967.893 t= 2.52e+03 R= 7e+04
-Depth= 9379 States= 1.68e+08 Transitions= 2.75e+09 Memory= 7022.190 t= 2.53e+03 R= 7e+04
-Depth= 9379 States= 1.69e+08 Transitions= 2.77e+09 Memory= 7076.779 t= 2.55e+03 R= 7e+04
-Depth= 9379 States= 1.7e+08 Transitions= 2.79e+09 Memory= 7102.365 t= 2.57e+03 R= 7e+04
-Depth= 9379 States= 1.71e+08 Transitions= 2.8e+09 Memory= 7119.162 t= 2.58e+03 R= 7e+04
-Depth= 9379 States= 1.72e+08 Transitions= 2.81e+09 Memory= 7135.178 t= 2.59e+03 R= 7e+04
-Depth= 9379 States= 1.73e+08 Transitions= 2.84e+09 Memory= 7150.022 t= 2.61e+03 R= 7e+04
-Depth= 9379 States= 1.74e+08 Transitions= 2.85e+09 Memory= 7164.475 t= 2.63e+03 R= 7e+04
-Depth= 9379 States= 1.75e+08 Transitions= 2.87e+09 Memory= 7180.295 t= 2.64e+03 R= 7e+04
-Depth= 9379 States= 1.76e+08 Transitions= 2.89e+09 Memory= 7198.264 t= 2.66e+03 R= 7e+04
-Depth= 9379 States= 1.77e+08 Transitions= 2.9e+09 Memory= 7211.447 t= 2.67e+03 R= 7e+04
-Depth= 9379 States= 1.78e+08 Transitions= 2.93e+09 Memory= 7224.338 t= 2.7e+03 R= 7e+04
-Depth= 9379 States= 1.79e+08 Transitions= 2.95e+09 Memory= 7239.084 t= 2.72e+03 R= 7e+04
-Depth= 9379 States= 1.8e+08 Transitions= 2.97e+09 Memory= 7253.342 t= 2.74e+03 R= 7e+04
-Depth= 9379 States= 1.81e+08 Transitions= 2.99e+09 Memory= 7268.283 t= 2.75e+03 R= 7e+04
-Depth= 9379 States= 1.82e+08 Transitions= 3.01e+09 Memory= 7283.615 t= 2.77e+03 R= 7e+04
-Depth= 9379 States= 1.83e+08 Transitions= 3.02e+09 Memory= 7335.276 t= 2.78e+03 R= 7e+04
-Depth= 9379 States= 1.84e+08 Transitions= 3.04e+09 Memory= 7403.928 t= 2.8e+03 R= 7e+04
-Depth= 9379 States= 1.85e+08 Transitions= 3.06e+09 Memory= 7472.580 t= 2.82e+03 R= 7e+04
-Depth= 9379 States= 1.86e+08 Transitions= 3.08e+09 Memory= 7501.877 t= 2.84e+03 R= 7e+04
-Depth= 9379 States= 1.87e+08 Transitions= 3.1e+09 Memory= 7528.147 t= 2.85e+03 R= 7e+04
-Depth= 9379 States= 1.88e+08 Transitions= 3.11e+09 Memory= 7566.135 t= 2.87e+03 R= 7e+04
-Depth= 9379 States= 1.89e+08 Transitions= 3.13e+09 Memory= 7593.479 t= 2.88e+03 R= 7e+04
-Depth= 9379 States= 1.9e+08 Transitions= 3.15e+09 Memory= 7625.119 t= 2.9e+03 R= 7e+04
-Depth= 9379 States= 1.91e+08 Transitions= 3.16e+09 Memory= 7647.483 t= 2.91e+03 R= 7e+04
-Depth= 9379 States= 1.92e+08 Transitions= 3.18e+09 Memory= 7677.951 t= 2.93e+03 R= 7e+04
-Depth= 9379 States= 1.93e+08 Transitions= 3.2e+09 Memory= 7698.947 t= 2.94e+03 R= 7e+04
-Depth= 9379 States= 1.94e+08 Transitions= 3.21e+09 Memory= 7732.443 t= 2.96e+03 R= 7e+04
-Depth= 9379 States= 1.95e+08 Transitions= 3.23e+09 Memory= 7772.092 t= 2.97e+03 R= 7e+04
-Depth= 9379 States= 1.96e+08 Transitions= 3.24e+09 Memory= 7815.451 t= 2.98e+03 R= 7e+04
-Depth= 9379 States= 1.97e+08 Transitions= 3.26e+09 Memory= 7839.865 t= 3e+03 R= 7e+04
-Depth= 9379 States= 1.98e+08 Transitions= 3.28e+09 Memory= 7869.651 t= 3.01e+03 R= 7e+04
-Depth= 9379 States= 1.99e+08 Transitions= 3.29e+09 Memory= 7921.018 t= 3.03e+03 R= 7e+04
-Depth= 9379 States= 2e+08 Transitions= 3.31e+09 Memory= 7986.740 t= 3.05e+03 R= 7e+04
-Depth= 9379 States= 2.01e+08 Transitions= 3.33e+09 Memory= 8023.752 t= 3.06e+03 R= 7e+04
-Depth= 9379 States= 2.02e+08 Transitions= 3.34e+09 Memory= 8039.768 t= 3.07e+03 R= 7e+04
-Depth= 9379 States= 2.03e+08 Transitions= 3.36e+09 Memory= 8053.830 t= 3.09e+03 R= 7e+04
-Depth= 9379 States= 2.04e+08 Transitions= 3.38e+09 Memory= 8068.772 t= 3.11e+03 R= 7e+04
-Depth= 9379 States= 2.05e+08 Transitions= 3.4e+09 Memory= 8083.127 t= 3.13e+03 R= 7e+04
-Depth= 9379 States= 2.06e+08 Transitions= 3.42e+09 Memory= 8098.068 t= 3.15e+03 R= 7e+04
-Depth= 9379 States= 2.07e+08 Transitions= 3.44e+09 Memory= 8115.744 t= 3.16e+03 R= 7e+04
-Depth= 9379 States= 2.08e+08 Transitions= 3.46e+09 Memory= 8178.537 t= 3.18e+03 R= 7e+04
-Depth= 9379 States= 2.09e+08 Transitions= 3.48e+09 Memory= 8220.627 t= 3.2e+03 R= 7e+04
-Depth= 9379 States= 2.1e+08 Transitions= 3.49e+09 Memory= 8246.799 t= 3.21e+03 R= 7e+04
-Depth= 9379 States= 2.11e+08 Transitions= 3.5e+09 Memory= 8263.791 t= 3.22e+03 R= 7e+04
-Depth= 9379 States= 2.12e+08 Transitions= 3.52e+09 Memory= 8279.514 t= 3.24e+03 R= 7e+04
-Depth= 9379 States= 2.13e+08 Transitions= 3.54e+09 Memory= 8293.772 t= 3.26e+03 R= 7e+04
-Depth= 9379 States= 2.14e+08 Transitions= 3.56e+09 Memory= 8309.201 t= 3.28e+03 R= 7e+04
-Depth= 9379 States= 2.15e+08 Transitions= 3.58e+09 Memory= 8323.752 t= 3.29e+03 R= 7e+04
-Depth= 9379 States= 2.16e+08 Transitions= 3.6e+09 Memory= 8342.990 t= 3.31e+03 R= 7e+04
-Depth= 9379 States= 2.17e+08 Transitions= 3.61e+09 Memory= 8355.197 t= 3.32e+03 R= 7e+04
-Depth= 9379 States= 2.18e+08 Transitions= 3.64e+09 Memory= 8368.674 t= 3.35e+03 R= 7e+04
-Depth= 9379 States= 2.19e+08 Transitions= 3.66e+09 Memory= 8382.932 t= 3.37e+03 R= 7e+04
-Depth= 9379 States= 2.2e+08 Transitions= 3.68e+09 Memory= 8398.459 t= 3.38e+03 R= 7e+04
-Depth= 9379 States= 2.21e+08 Transitions= 3.7e+09 Memory= 8412.912 t= 3.4e+03 R= 6e+04
-Depth= 9379 States= 2.22e+08 Transitions= 3.71e+09 Memory= 8428.244 t= 3.42e+03 R= 6e+04
-Depth= 9379 States= 2.23e+08 Transitions= 3.73e+09 Memory= 8491.721 t= 3.43e+03 R= 6e+04
-Depth= 9379 States= 2.24e+08 Transitions= 3.75e+09 Memory= 8560.373 t= 3.45e+03 R= 6e+04
-Depth= 9379 States= 2.25e+08 Transitions= 3.77e+09 Memory= 8621.604 t= 3.47e+03 R= 6e+04
-Depth= 9379 States= 2.26e+08 Transitions= 3.79e+09 Memory= 8648.850 t= 3.48e+03 R= 6e+04
-Depth= 9379 States= 2.27e+08 Transitions= 3.81e+09 Memory= 8671.994 t= 3.5e+03 R= 6e+04
-Depth= 9379 States= 2.28e+08 Transitions= 3.82e+09 Memory= 8710.861 t= 3.51e+03 R= 6e+04
-Depth= 9379 States= 2.29e+08 Transitions= 3.84e+09 Memory= 8742.893 t= 3.53e+03 R= 6e+04
-Depth= 9379 States= 2.3e+08 Transitions= 3.85e+09 Memory= 8771.799 t= 3.54e+03 R= 6e+04
-Depth= 9379 States= 2.31e+08 Transitions= 3.87e+09 Memory= 8792.600 t= 3.56e+03 R= 6e+04
-Depth= 9379 States= 2.32e+08 Transitions= 3.89e+09 Memory= 8828.733 t= 3.57e+03 R= 6e+04
-Depth= 9379 States= 2.33e+08 Transitions= 3.9e+09 Memory= 8843.869 t= 3.59e+03 R= 6e+04
-Depth= 9379 States= 2.34e+08 Transitions= 3.92e+09 Memory= 8884.787 t= 3.6e+03 R= 6e+04
-Depth= 9379 States= 2.35e+08 Transitions= 3.93e+09 Memory= 8924.240 t= 3.62e+03 R= 6e+04
-Depth= 9379 States= 2.36e+08 Transitions= 3.95e+09 Memory= 8960.276 t= 3.63e+03 R= 6e+04
-Depth= 9379 States= 2.37e+08 Transitions= 3.97e+09 Memory= 8984.494 t= 3.65e+03 R= 6e+04
-Depth= 9379 States= 2.38e+08 Transitions= 3.98e+09 Memory= 9016.428 t= 3.66e+03 R= 6e+04
-Depth= 9379 States= 2.39e+08 Transitions= 4e+09 Memory= 9077.365 t= 3.68e+03 R= 6e+04
-Depth= 9379 States= 2.4e+08 Transitions= 4.02e+09 Memory= 9143.088 t= 3.7e+03 R= 6e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 9379, errors: 0
- 88114592 states, stored (2.40192e+08 visited)
-3.782223e+09 states, matched
-4.0224152e+09 transitions (= visited+matched)
-1.4282782e+10 atomic steps
-hash conflicts: 5.384059e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7731.001 equivalent memory usage for states (stored*(State-vector + overhead))
- 6648.180 actual memory usage for states (compression: 85.99%)
- state-vector as stored = 51 byte + 28 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.188 memory lost to fragmentation
- 9152.756 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.7e+03 seconds
-pan: rate 64918.749 states/second
-pan: avg transition delay 9.1982e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-depth 15: Claim reached state 9 (line 750)
-depth 1194: Claim reached state 9 (line 749)
-Depth= 3253 States= 1e+06 Transitions= 1.06e+07 Memory= 484.416 t= 9.57 R= 1e+05
-Depth= 3253 States= 2e+06 Transitions= 2.04e+07 Memory= 501.311 t= 18.5 R= 1e+05
-pan: acceptance cycle (at depth 1938)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 23684, errors: 1
- 682672 states, stored (2.81536e+06 visited)
- 30226122 states, matched
- 33041487 transitions (= visited+matched)
-1.1631626e+08 atomic steps
-hash conflicts: 6056013 (resolved)
-
-Stats on memory usage (in Megabytes):
- 59.896 equivalent memory usage for states (stored*(State-vector + overhead))
- 47.456 actual memory usage for states (compression: 79.23%)
- state-vector as stored = 45 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 513.127 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 256, "(1)"
- line 419, "pan.___", state 286, "(1)"
- line 400, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 395, "(1)"
- line 419, "pan.___", state 425, "(1)"
- line 541, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 400, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 70, "(1)"
- line 419, "pan.___", state 100, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 247, "(1)"
- line 419, "pan.___", state 277, "(1)"
- line 400, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 359, "(1)"
- line 419, "pan.___", state 389, "(1)"
- line 615, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 402, "pan.___", state 134, "((i<1))"
- line 402, "pan.___", state 134, "((i>=1))"
- line 410, "pan.___", state 153, "(1)"
- line 410, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 154, "else"
- line 410, "pan.___", state 157, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 414, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 167, "else"
- line 414, "pan.___", state 170, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 412, "pan.___", state 176, "((i<1))"
- line 412, "pan.___", state 176, "((i>=1))"
- line 419, "pan.___", state 183, "(1)"
- line 419, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 184, "else"
- line 419, "pan.___", state 187, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 370, "pan.___", state 193, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 647, "pan.___", state 202, "((write_lock==0))"
- line 647, "pan.___", state 202, "else"
- line 645, "pan.___", state 203, "(1)"
- line 176, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 180, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 225, "((j<1))"
- line 178, "pan.___", state 225, "((j>=1))"
- line 184, "pan.___", state 230, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 240, "(1)"
- line 165, "pan.___", state 248, "(1)"
- line 165, "pan.___", state 249, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 165, "pan.___", state 249, "else"
- line 163, "pan.___", state 254, "((j<1))"
- line 163, "pan.___", state 254, "((j>=1))"
- line 169, "pan.___", state 260, "(1)"
- line 169, "pan.___", state 261, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 169, "pan.___", state 261, "else"
- line 171, "pan.___", state 264, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 171, "pan.___", state 264, "else"
- line 176, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 180, "pan.___", state 280, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 288, "((j<1))"
- line 178, "pan.___", state 288, "((j>=1))"
- line 184, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 303, "(1)"
- line 165, "pan.___", state 311, "(1)"
- line 165, "pan.___", state 312, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 165, "pan.___", state 312, "else"
- line 163, "pan.___", state 317, "((j<1))"
- line 163, "pan.___", state 317, "((j>=1))"
- line 169, "pan.___", state 323, "(1)"
- line 169, "pan.___", state 324, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 169, "pan.___", state 324, "else"
- line 171, "pan.___", state 327, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 171, "pan.___", state 327, "else"
- line 215, "pan.___", state 333, "((i<1))"
- line 215, "pan.___", state 333, "((i>=1))"
- line 176, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 180, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 355, "((j<1))"
- line 178, "pan.___", state 355, "((j>=1))"
- line 184, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 370, "(1)"
- line 165, "pan.___", state 378, "(1)"
- line 165, "pan.___", state 379, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 165, "pan.___", state 379, "else"
- line 163, "pan.___", state 384, "((j<1))"
- line 163, "pan.___", state 384, "((j>=1))"
- line 169, "pan.___", state 390, "(1)"
- line 169, "pan.___", state 391, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 169, "pan.___", state 391, "else"
- line 171, "pan.___", state 394, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 171, "pan.___", state 394, "else"
- line 400, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 410, "(1)"
- line 404, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 424, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 402, "pan.___", state 430, "((i<1))"
- line 402, "pan.___", state 430, "((i>=1))"
- line 409, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 449, "(1)"
- line 410, "pan.___", state 450, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 450, "else"
- line 410, "pan.___", state 453, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 414, "pan.___", state 462, "(1)"
- line 414, "pan.___", state 463, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 463, "else"
- line 414, "pan.___", state 466, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 412, "pan.___", state 472, "((i<1))"
- line 412, "pan.___", state 472, "((i>=1))"
- line 419, "pan.___", state 479, "(1)"
- line 419, "pan.___", state 480, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 480, "else"
- line 419, "pan.___", state 483, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 370, "pan.___", state 489, "(1)"
- line 662, "pan.___", state 492, "cached_urcu_gp_ctr.val[( ((_pid<2)) ? (0) : (1) )] = (tmp^(1<<7))"
- line 400, "pan.___", state 498, "(1)"
- line 400, "pan.___", state 499, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 499, "else"
- line 400, "pan.___", state 502, "(1)"
- line 404, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 516, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 402, "pan.___", state 522, "((i<1))"
- line 402, "pan.___", state 522, "((i>=1))"
- line 409, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 541, "(1)"
- line 410, "pan.___", state 542, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 542, "else"
- line 410, "pan.___", state 545, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 414, "pan.___", state 554, "(1)"
- line 414, "pan.___", state 555, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 555, "else"
- line 414, "pan.___", state 558, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 412, "pan.___", state 564, "((i<1))"
- line 412, "pan.___", state 564, "((i>=1))"
- line 419, "pan.___", state 571, "(1)"
- line 419, "pan.___", state 572, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 572, "else"
- line 419, "pan.___", state 575, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 370, "pan.___", state 581, "(1)"
- line 400, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 595, "(1)"
- line 404, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 609, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 402, "pan.___", state 615, "((i<1))"
- line 402, "pan.___", state 615, "((i>=1))"
- line 409, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 634, "(1)"
- line 410, "pan.___", state 635, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 635, "else"
- line 410, "pan.___", state 638, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 414, "pan.___", state 647, "(1)"
- line 414, "pan.___", state 648, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 648, "else"
- line 414, "pan.___", state 651, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 412, "pan.___", state 657, "((i<1))"
- line 412, "pan.___", state 657, "((i>=1))"
- line 419, "pan.___", state 664, "(1)"
- line 419, "pan.___", state 665, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 665, "else"
- line 419, "pan.___", state 668, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 370, "pan.___", state 674, "(1)"
- line 400, "pan.___", state 679, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 681, "(1)"
- line 400, "pan.___", state 682, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 682, "else"
- line 400, "pan.___", state 685, "(1)"
- line 404, "pan.___", state 693, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 695, "(1)"
- line 404, "pan.___", state 696, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 696, "else"
- line 404, "pan.___", state 699, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 402, "pan.___", state 705, "((i<1))"
- line 402, "pan.___", state 705, "((i>=1))"
- line 409, "pan.___", state 711, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 724, "(1)"
- line 410, "pan.___", state 725, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 725, "else"
- line 410, "pan.___", state 728, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 414, "pan.___", state 737, "(1)"
- line 414, "pan.___", state 738, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 738, "else"
- line 414, "pan.___", state 741, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 412, "pan.___", state 747, "((i<1))"
- line 412, "pan.___", state 747, "((i>=1))"
- line 419, "pan.___", state 754, "(1)"
- line 419, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 755, "else"
- line 419, "pan.___", state 758, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 370, "pan.___", state 764, "(1)"
- line 430, "pan.___", state 767, "(((tmp2&((1<<7)-1))&&((tmp2^cached_urcu_gp_ctr.val[( ((_pid<2)) ? (0) : (1) )])&(1<<7))))"
- line 430, "pan.___", state 767, "else"
- line 400, "pan.___", state 777, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 779, "(1)"
- line 400, "pan.___", state 780, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 780, "else"
- line 400, "pan.___", state 783, "(1)"
- line 404, "pan.___", state 791, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 793, "(1)"
- line 404, "pan.___", state 794, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 794, "else"
- line 404, "pan.___", state 797, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 402, "pan.___", state 803, "((i<1))"
- line 402, "pan.___", state 803, "((i>=1))"
- line 409, "pan.___", state 809, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 822, "(1)"
- line 410, "pan.___", state 823, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 823, "else"
- line 410, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 414, "pan.___", state 835, "(1)"
- line 414, "pan.___", state 836, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 836, "else"
- line 414, "pan.___", state 839, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 412, "pan.___", state 845, "((i<1))"
- line 412, "pan.___", state 845, "((i>=1))"
- line 419, "pan.___", state 852, "(1)"
- line 419, "pan.___", state 853, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 853, "else"
- line 419, "pan.___", state 856, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 370, "pan.___", state 862, "(1)"
- line 449, "pan.___", state 870, "((tmp<1))"
- line 449, "pan.___", state 870, "((tmp>=1))"
- line 462, "pan.___", state 873, "tmp = 0"
- line 400, "pan.___", state 877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 883, "(1)"
- line 404, "pan.___", state 891, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 897, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 903, "((i<1))"
- line 402, "pan.___", state 903, "((i>=1))"
- line 409, "pan.___", state 909, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 922, "(1)"
- line 410, "pan.___", state 923, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 923, "else"
- line 410, "pan.___", state 926, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 414, "pan.___", state 935, "(1)"
- line 414, "pan.___", state 936, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 936, "else"
- line 414, "pan.___", state 939, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 945, "((i<1))"
- line 412, "pan.___", state 945, "((i>=1))"
- line 419, "pan.___", state 952, "(1)"
- line 419, "pan.___", state 953, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 953, "else"
- line 419, "pan.___", state 956, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 370, "pan.___", state 962, "(1)"
- line 671, "pan.___", state 963, "tmp = cached_urcu_gp_ctr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 400, "pan.___", state 967, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 973, "(1)"
- line 404, "pan.___", state 981, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 987, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 402, "pan.___", state 993, "((i<1))"
- line 402, "pan.___", state 993, "((i>=1))"
- line 409, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1012, "(1)"
- line 410, "pan.___", state 1013, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1013, "else"
- line 410, "pan.___", state 1016, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 414, "pan.___", state 1025, "(1)"
- line 414, "pan.___", state 1026, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1026, "else"
- line 414, "pan.___", state 1029, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 412, "pan.___", state 1035, "((i<1))"
- line 412, "pan.___", state 1035, "((i>=1))"
- line 419, "pan.___", state 1042, "(1)"
- line 419, "pan.___", state 1043, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1043, "else"
- line 419, "pan.___", state 1046, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 370, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1061, "(1)"
- line 404, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1117, "(1)"
- line 419, "pan.___", state 1134, "(1)"
- line 404, "pan.___", state 1166, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1184, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1210, "(1)"
- line 419, "pan.___", state 1227, "(1)"
- line 400, "pan.___", state 1242, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1256, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1287, "(1)"
- line 414, "pan.___", state 1300, "(1)"
- line 419, "pan.___", state 1317, "(1)"
- line 400, "pan.___", state 1340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1342, "(1)"
- line 400, "pan.___", state 1343, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1343, "else"
- line 400, "pan.___", state 1346, "(1)"
- line 404, "pan.___", state 1354, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1356, "(1)"
- line 404, "pan.___", state 1357, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1357, "else"
- line 404, "pan.___", state 1360, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 402, "pan.___", state 1366, "((i<1))"
- line 402, "pan.___", state 1366, "((i>=1))"
- line 409, "pan.___", state 1372, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1385, "(1)"
- line 410, "pan.___", state 1386, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1386, "else"
- line 410, "pan.___", state 1389, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 414, "pan.___", state 1398, "(1)"
- line 414, "pan.___", state 1399, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1399, "else"
- line 414, "pan.___", state 1402, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 412, "pan.___", state 1408, "((i<1))"
- line 412, "pan.___", state 1408, "((i>=1))"
- line 419, "pan.___", state 1415, "(1)"
- line 419, "pan.___", state 1416, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1416, "else"
- line 419, "pan.___", state 1419, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 180, "pan.___", state 1448, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 184, "pan.___", state 1461, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 1471, "(1)"
- line 165, "pan.___", state 1479, "(1)"
- line 169, "pan.___", state 1491, "(1)"
- line 176, "pan.___", state 1502, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 184, "pan.___", state 1524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 1534, "(1)"
- line 165, "pan.___", state 1542, "(1)"
- line 169, "pan.___", state 1554, "(1)"
- line 176, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 180, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 184, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 1601, "(1)"
- line 165, "pan.___", state 1609, "(1)"
- line 169, "pan.___", state 1621, "(1)"
- line 370, "pan.___", state 1642, "(1)"
- line 696, "pan.___", state 1643, "(1)"
- line 703, "pan.___", state 1646, "-end-"
- (308 of 1646 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 752, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 30.2 seconds
-pan: rate 93347.646 states/second
-pan: avg transition delay 9.1279e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
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-23084:2:597
-23085:2:601
-23086:2:602
-23087:2:609
-23088:2:610
-23089:2:621
-23090:2:622
-23091:2:623
-23092:2:634
-23093:2:639
-23094:2:640
-23095:0:2565
-23096:3:2104
-23097:0:2565
-23098:3:2105
-23099:3:2109
-23100:3:2110
-23101:3:2118
-23102:3:2119
-23103:3:2123
-23104:3:2124
-23105:3:2132
-23106:3:2137
-23107:3:2141
-23108:3:2142
-23109:3:2149
-23110:3:2150
-23111:3:2161
-23112:3:2169
-23113:3:2170
-23114:3:2174
-23115:3:2179
-23116:3:2180
-23117:0:2565
-23118:3:2192
-23119:0:2565
-23120:3:2013
-23121:0:2565
-23122:3:2014
-23123:0:2565
-23124:3:2015
-23125:3:2019
-23126:3:2020
-23127:3:2028
-23128:3:2029
-23129:3:2033
-23130:3:2034
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-23132:3:2047
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-23137:3:2071
-23138:3:2079
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-23155:2:658
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-23192:2:765
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-23196:2:771
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-23201:2:798
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-23212:0:2565
-23213:3:2104
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-23216:3:2109
-23217:3:2110
-23218:3:2118
-23219:3:2119
-23220:3:2123
-23221:3:2124
-23222:3:2132
-23223:3:2137
-23224:3:2141
-23225:3:2142
-23226:3:2149
-23227:3:2150
-23228:3:2161
-23229:3:2169
-23230:3:2170
-23231:3:2174
-23232:3:2179
-23233:3:2180
-23234:0:2565
-23235:3:2192
-23236:0:2565
-23237:3:2013
-23238:0:2565
-23239:3:2014
-23240:0:2565
-23241:3:2015
-23242:3:2019
-23243:3:2020
-23244:3:2028
-23245:3:2029
-23246:3:2033
-23247:3:2034
-23248:3:2042
-23249:3:2047
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-23251:3:2052
-23252:3:2059
-23253:3:2060
-23254:3:2071
-23255:3:2079
-23256:3:2080
-23257:3:2084
-23258:3:2089
-23259:3:2090
-23260:0:2565
-23261:3:2102
-23262:0:2565
-23263:2:853
-23264:0:2565
-23265:2:857
-23266:0:2565
-23267:1:197
-23268:0:2565
-23269:2:465
-23270:0:2565
-23271:1:198
-23272:0:2565
-23273:3:2104
-23274:0:2565
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-23277:3:2110
-23278:3:2118
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-23280:3:2123
-23281:3:2124
-23282:3:2132
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-23284:3:2141
-23285:3:2142
-23286:3:2149
-23287:3:2150
-23288:3:2161
-23289:3:2169
-23290:3:2170
-23291:3:2174
-23292:3:2179
-23293:3:2180
-23294:0:2565
-23295:3:2192
-23296:0:2565
-23297:3:2013
-23298:0:2565
-23299:3:2014
-23300:0:2565
-23301:3:2015
-23302:3:2019
-23303:3:2020
-23304:3:2028
-23305:3:2029
-23306:3:2033
-23307:3:2034
-23308:3:2042
-23309:3:2047
-23310:3:2051
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-23312:3:2059
-23313:3:2060
-23314:3:2071
-23315:3:2079
-23316:3:2080
-23317:3:2084
-23318:3:2089
-23319:3:2090
-23320:0:2565
-23321:3:2102
-23322:0:2565
-23323:1:197
-23324:0:2565
-23325:3:2104
-23326:0:2565
-23327:3:2105
-23328:3:2109
-23329:3:2110
-23330:3:2118
-23331:3:2119
-23332:3:2123
-23333:3:2124
-23334:3:2132
-23335:3:2137
-23336:3:2141
-23337:3:2142
-23338:3:2149
-23339:3:2150
-23340:3:2161
-23341:3:2169
-23342:3:2170
-23343:3:2174
-23344:3:2179
-23345:3:2180
-23346:0:2565
-23347:3:2192
-23348:0:2565
-23349:3:2013
-23350:0:2565
-23351:3:2014
-23352:0:2565
-23353:3:2015
-23354:3:2019
-23355:3:2020
-23356:3:2028
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-23358:3:2033
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-23365:3:2060
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-23367:3:2079
-23368:3:2080
-23369:3:2084
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-23371:3:2090
-23372:0:2565
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-23376:0:2565
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-23384:3:2118
-23385:3:2119
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-23402:0:2565
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-23404:0:2565
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-23406:0:2565
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-23436:3:2118
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-23439:3:2124
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-23443:3:2142
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-23447:3:2169
-23448:3:2170
-23449:3:2174
-23450:3:2179
-23451:3:2180
-23452:0:2565
-23453:3:2192
-23454:0:2565
-23455:3:2013
-23456:0:2565
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-23458:0:2565
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-23461:3:2020
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-23504:3:2170
-23505:3:2174
-23506:3:2179
-23507:3:2180
-23508:0:2565
-23509:3:2192
-23510:0:2565
-23511:3:2013
-23512:0:2565
-23513:3:2014
-23514:0:2565
-23515:3:2015
-23516:3:2019
-23517:3:2020
-23518:3:2028
-23519:3:2029
-23520:3:2033
-23521:3:2034
-23522:3:2042
-23523:3:2047
-23524:3:2051
-23525:3:2052
-23526:3:2059
-23527:3:2060
-23528:3:2071
-23529:3:2079
-23530:3:2080
-23531:3:2084
-23532:3:2089
-23533:3:2090
-23534:0:2565
-23535:3:2102
-23536:0:2565
-23537:2:467
-23538:0:2565
-23539:2:468
-23540:0:2565
-23541:3:2104
-23542:0:2565
-23543:3:2105
-23544:3:2109
-23545:3:2110
-23546:3:2118
-23547:3:2119
-23548:3:2123
-23549:3:2124
-23550:3:2132
-23551:3:2137
-23552:3:2141
-23553:3:2142
-23554:3:2149
-23555:3:2150
-23556:3:2161
-23557:3:2169
-23558:3:2170
-23559:3:2174
-23560:3:2179
-23561:3:2180
-23562:0:2565
-23563:3:2192
-23564:0:2565
-23565:3:2013
-23566:0:2565
-23567:3:2014
-23568:0:2565
-23569:1:206
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 40 byte, depth reached 7872, errors: 0
- 20128 states, stored
- 191477 states, matched
- 211605 transitions (= stored+matched)
- 712166 atomic steps
-hash conflicts: 942 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.305 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.467 actual memory usage for states (unsuccessful compression: 112.36%)
- state-vector as stored = 48 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.229 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 401, ".input.spin", state 330, "(1)"
- line 612, ".input.spin", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 397, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 406, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 59, "(1)"
- line 416, ".input.spin", state 89, "(1)"
- line 397, ".input.spin", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 160, "(1)"
- line 650, ".input.spin", state 213, "(1)"
- line 173, ".input.spin", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 233, "(1)"
- line 158, ".input.spin", state 254, "(1)"
- line 162, ".input.spin", state 262, "(1)"
- line 166, ".input.spin", state 274, "(1)"
- line 173, ".input.spin", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 317, "(1)"
- line 162, ".input.spin", state 325, "(1)"
- line 166, ".input.spin", state 337, "(1)"
- line 173, ".input.spin", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 384, "(1)"
- line 162, ".input.spin", state 392, "(1)"
- line 166, ".input.spin", state 404, "(1)"
- line 397, ".input.spin", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 441, "(1)"
- line 406, ".input.spin", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 470, "(1)"
- line 416, ".input.spin", state 500, "(1)"
- line 397, ".input.spin", state 526, "(1)"
- line 401, ".input.spin", state 540, "(1)"
- line 406, ".input.spin", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 599, "(1)"
- line 401, ".input.spin", state 640, "(1)"
- line 406, ".input.spin", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 699, "(1)"
- line 173, ".input.spin", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 722, "(1)"
- line 177, ".input.spin", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 731, "(1)"
- line 177, ".input.spin", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 732, "else"
- line 175, ".input.spin", state 737, "((j<1))"
- line 175, ".input.spin", state 737, "((j>=1))"
- line 181, ".input.spin", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 752, "(1)"
- line 162, ".input.spin", state 760, "(1)"
- line 162, ".input.spin", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 761, "else"
- line 160, ".input.spin", state 766, "((j<1))"
- line 160, ".input.spin", state 766, "((j>=1))"
- line 166, ".input.spin", state 772, "(1)"
- line 166, ".input.spin", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 773, "else"
- line 168, ".input.spin", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 776, "else"
- line 173, ".input.spin", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 785, "(1)"
- line 177, ".input.spin", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 794, "(1)"
- line 177, ".input.spin", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 795, "else"
- line 175, ".input.spin", state 800, "((j<1))"
- line 175, ".input.spin", state 800, "((j>=1))"
- line 181, ".input.spin", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 815, "(1)"
- line 162, ".input.spin", state 823, "(1)"
- line 162, ".input.spin", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 824, "else"
- line 160, ".input.spin", state 829, "((j<1))"
- line 160, ".input.spin", state 829, "((j>=1))"
- line 166, ".input.spin", state 835, "(1)"
- line 166, ".input.spin", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 836, "else"
- line 168, ".input.spin", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 839, "else"
- line 200, ".input.spin", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 841, "else"
- line 212, ".input.spin", state 845, "((i<1))"
- line 212, ".input.spin", state 845, "((i>=1))"
- line 173, ".input.spin", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 852, "(1)"
- line 177, ".input.spin", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 861, "(1)"
- line 177, ".input.spin", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 862, "else"
- line 175, ".input.spin", state 867, "((j<1))"
- line 175, ".input.spin", state 867, "((j>=1))"
- line 181, ".input.spin", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 882, "(1)"
- line 162, ".input.spin", state 890, "(1)"
- line 162, ".input.spin", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 891, "else"
- line 160, ".input.spin", state 896, "((j<1))"
- line 160, ".input.spin", state 896, "((j>=1))"
- line 166, ".input.spin", state 902, "(1)"
- line 166, ".input.spin", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 903, "else"
- line 168, ".input.spin", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 906, "else"
- line 200, ".input.spin", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 908, "else"
- line 219, ".input.spin", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 909, "else"
- line 354, ".input.spin", state 915, "((sighand_exec==1))"
- line 354, ".input.spin", state 915, "else"
- line 360, ".input.spin", state 918, "sighand_exec = 1"
- line 397, ".input.spin", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 933, "(1)"
- line 397, ".input.spin", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 934, "else"
- line 397, ".input.spin", state 937, "(1)"
- line 401, ".input.spin", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 947, "(1)"
- line 401, ".input.spin", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 948, "else"
- line 401, ".input.spin", state 951, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 399, ".input.spin", state 957, "((i<1))"
- line 399, ".input.spin", state 957, "((i>=1))"
- line 406, ".input.spin", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 976, "(1)"
- line 407, ".input.spin", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 977, "else"
- line 407, ".input.spin", state 980, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 411, ".input.spin", state 989, "(1)"
- line 411, ".input.spin", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 990, "else"
- line 411, ".input.spin", state 993, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 409, ".input.spin", state 999, "((i<1))"
- line 409, ".input.spin", state 999, "((i>=1))"
- line 416, ".input.spin", state 1006, "(1)"
- line 416, ".input.spin", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1007, "else"
- line 416, ".input.spin", state 1010, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 360, ".input.spin", state 1023, "sighand_exec = 1"
- line 401, ".input.spin", state 1054, "(1)"
- line 406, ".input.spin", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1113, "(1)"
- line 401, ".input.spin", state 1151, "(1)"
- line 406, ".input.spin", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1210, "(1)"
- line 397, ".input.spin", state 1236, "(1)"
- line 401, ".input.spin", state 1250, "(1)"
- line 406, ".input.spin", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1309, "(1)"
- line 401, ".input.spin", state 1350, "(1)"
- line 406, ".input.spin", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1409, "(1)"
- line 173, ".input.spin", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1432, "(1)"
- line 177, ".input.spin", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1441, "(1)"
- line 177, ".input.spin", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1442, "else"
- line 175, ".input.spin", state 1447, "((j<1))"
- line 175, ".input.spin", state 1447, "((j>=1))"
- line 181, ".input.spin", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1462, "(1)"
- line 162, ".input.spin", state 1470, "(1)"
- line 162, ".input.spin", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1471, "else"
- line 160, ".input.spin", state 1476, "((j<1))"
- line 160, ".input.spin", state 1476, "((j>=1))"
- line 166, ".input.spin", state 1482, "(1)"
- line 166, ".input.spin", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1483, "else"
- line 168, ".input.spin", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1486, "else"
- line 173, ".input.spin", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 1495, "(1)"
- line 177, ".input.spin", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1504, "(1)"
- line 177, ".input.spin", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 1505, "else"
- line 175, ".input.spin", state 1510, "((j<1))"
- line 175, ".input.spin", state 1510, "((j>=1))"
- line 181, ".input.spin", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1525, "(1)"
- line 162, ".input.spin", state 1533, "(1)"
- line 162, ".input.spin", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 1534, "else"
- line 160, ".input.spin", state 1539, "((j<1))"
- line 160, ".input.spin", state 1539, "((j>=1))"
- line 166, ".input.spin", state 1545, "(1)"
- line 166, ".input.spin", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 1546, "else"
- line 168, ".input.spin", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 1549, "else"
- line 200, ".input.spin", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 1551, "else"
- line 212, ".input.spin", state 1555, "((i<1))"
- line 212, ".input.spin", state 1555, "((i>=1))"
- line 173, ".input.spin", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1562, "(1)"
- line 177, ".input.spin", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1571, "(1)"
- line 177, ".input.spin", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1572, "else"
- line 175, ".input.spin", state 1577, "((j<1))"
- line 175, ".input.spin", state 1577, "((j>=1))"
- line 181, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1592, "(1)"
- line 162, ".input.spin", state 1600, "(1)"
- line 162, ".input.spin", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1601, "else"
- line 160, ".input.spin", state 1606, "((j<1))"
- line 160, ".input.spin", state 1606, "((j>=1))"
- line 166, ".input.spin", state 1612, "(1)"
- line 166, ".input.spin", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1613, "else"
- line 168, ".input.spin", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1616, "else"
- line 200, ".input.spin", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 1618, "else"
- line 219, ".input.spin", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 1619, "else"
- line 354, ".input.spin", state 1625, "((sighand_exec==1))"
- line 354, ".input.spin", state 1625, "else"
- line 360, ".input.spin", state 1628, "sighand_exec = 1"
- line 397, ".input.spin", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 1643, "(1)"
- line 397, ".input.spin", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 1644, "else"
- line 397, ".input.spin", state 1647, "(1)"
- line 401, ".input.spin", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 1657, "(1)"
- line 401, ".input.spin", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 1658, "else"
- line 401, ".input.spin", state 1661, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 399, ".input.spin", state 1667, "((i<1))"
- line 399, ".input.spin", state 1667, "((i>=1))"
- line 406, ".input.spin", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 1686, "(1)"
- line 407, ".input.spin", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 1687, "else"
- line 407, ".input.spin", state 1690, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 411, ".input.spin", state 1699, "(1)"
- line 411, ".input.spin", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 1700, "else"
- line 411, ".input.spin", state 1703, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 409, ".input.spin", state 1709, "((i<1))"
- line 409, ".input.spin", state 1709, "((i>=1))"
- line 416, ".input.spin", state 1716, "(1)"
- line 416, ".input.spin", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1717, "else"
- line 416, ".input.spin", state 1720, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 360, ".input.spin", state 1733, "sighand_exec = 1"
- line 177, ".input.spin", state 1758, "(1)"
- line 181, ".input.spin", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1779, "(1)"
- line 162, ".input.spin", state 1787, "(1)"
- line 166, ".input.spin", state 1799, "(1)"
- line 173, ".input.spin", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1842, "(1)"
- line 162, ".input.spin", state 1850, "(1)"
- line 166, ".input.spin", state 1862, "(1)"
- line 173, ".input.spin", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1909, "(1)"
- line 162, ".input.spin", state 1917, "(1)"
- line 166, ".input.spin", state 1929, "(1)"
- line 700, ".input.spin", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 0.12 seconds
-pan: rate 167733.33 states/second
-pan: avg transition delay 5.6709e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 40 byte, depth reached 7872, errors: 0
- 20128 states, stored
- 191477 states, matched
- 211605 transitions (= stored+matched)
- 712166 atomic steps
-hash conflicts: 942 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.305 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.467 actual memory usage for states (unsuccessful compression: 112.36%)
- state-vector as stored = 48 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.229 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 401, ".input.spin", state 330, "(1)"
- line 612, ".input.spin", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 397, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 406, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 59, "(1)"
- line 416, ".input.spin", state 89, "(1)"
- line 397, ".input.spin", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 160, "(1)"
- line 650, ".input.spin", state 213, "(1)"
- line 173, ".input.spin", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 233, "(1)"
- line 158, ".input.spin", state 254, "(1)"
- line 162, ".input.spin", state 262, "(1)"
- line 166, ".input.spin", state 274, "(1)"
- line 173, ".input.spin", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 317, "(1)"
- line 162, ".input.spin", state 325, "(1)"
- line 166, ".input.spin", state 337, "(1)"
- line 173, ".input.spin", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 384, "(1)"
- line 162, ".input.spin", state 392, "(1)"
- line 166, ".input.spin", state 404, "(1)"
- line 397, ".input.spin", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 441, "(1)"
- line 406, ".input.spin", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 470, "(1)"
- line 416, ".input.spin", state 500, "(1)"
- line 397, ".input.spin", state 526, "(1)"
- line 401, ".input.spin", state 540, "(1)"
- line 406, ".input.spin", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 599, "(1)"
- line 401, ".input.spin", state 640, "(1)"
- line 406, ".input.spin", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 699, "(1)"
- line 173, ".input.spin", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 722, "(1)"
- line 177, ".input.spin", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 731, "(1)"
- line 177, ".input.spin", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 732, "else"
- line 175, ".input.spin", state 737, "((j<1))"
- line 175, ".input.spin", state 737, "((j>=1))"
- line 181, ".input.spin", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 752, "(1)"
- line 162, ".input.spin", state 760, "(1)"
- line 162, ".input.spin", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 761, "else"
- line 160, ".input.spin", state 766, "((j<1))"
- line 160, ".input.spin", state 766, "((j>=1))"
- line 166, ".input.spin", state 772, "(1)"
- line 166, ".input.spin", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 773, "else"
- line 168, ".input.spin", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 776, "else"
- line 173, ".input.spin", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 785, "(1)"
- line 177, ".input.spin", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 794, "(1)"
- line 177, ".input.spin", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 795, "else"
- line 175, ".input.spin", state 800, "((j<1))"
- line 175, ".input.spin", state 800, "((j>=1))"
- line 181, ".input.spin", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 815, "(1)"
- line 162, ".input.spin", state 823, "(1)"
- line 162, ".input.spin", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 824, "else"
- line 160, ".input.spin", state 829, "((j<1))"
- line 160, ".input.spin", state 829, "((j>=1))"
- line 166, ".input.spin", state 835, "(1)"
- line 166, ".input.spin", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 836, "else"
- line 168, ".input.spin", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 839, "else"
- line 200, ".input.spin", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 841, "else"
- line 212, ".input.spin", state 845, "((i<1))"
- line 212, ".input.spin", state 845, "((i>=1))"
- line 173, ".input.spin", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 852, "(1)"
- line 177, ".input.spin", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 861, "(1)"
- line 177, ".input.spin", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 862, "else"
- line 175, ".input.spin", state 867, "((j<1))"
- line 175, ".input.spin", state 867, "((j>=1))"
- line 181, ".input.spin", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 882, "(1)"
- line 162, ".input.spin", state 890, "(1)"
- line 162, ".input.spin", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 891, "else"
- line 160, ".input.spin", state 896, "((j<1))"
- line 160, ".input.spin", state 896, "((j>=1))"
- line 166, ".input.spin", state 902, "(1)"
- line 166, ".input.spin", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 903, "else"
- line 168, ".input.spin", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 906, "else"
- line 200, ".input.spin", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 908, "else"
- line 219, ".input.spin", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 909, "else"
- line 354, ".input.spin", state 915, "((sighand_exec==1))"
- line 354, ".input.spin", state 915, "else"
- line 360, ".input.spin", state 918, "sighand_exec = 1"
- line 397, ".input.spin", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 933, "(1)"
- line 397, ".input.spin", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 934, "else"
- line 397, ".input.spin", state 937, "(1)"
- line 401, ".input.spin", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 947, "(1)"
- line 401, ".input.spin", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 948, "else"
- line 401, ".input.spin", state 951, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 399, ".input.spin", state 957, "((i<1))"
- line 399, ".input.spin", state 957, "((i>=1))"
- line 406, ".input.spin", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 976, "(1)"
- line 407, ".input.spin", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 977, "else"
- line 407, ".input.spin", state 980, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 411, ".input.spin", state 989, "(1)"
- line 411, ".input.spin", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 990, "else"
- line 411, ".input.spin", state 993, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 409, ".input.spin", state 999, "((i<1))"
- line 409, ".input.spin", state 999, "((i>=1))"
- line 416, ".input.spin", state 1006, "(1)"
- line 416, ".input.spin", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1007, "else"
- line 416, ".input.spin", state 1010, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 360, ".input.spin", state 1023, "sighand_exec = 1"
- line 401, ".input.spin", state 1054, "(1)"
- line 406, ".input.spin", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1113, "(1)"
- line 401, ".input.spin", state 1151, "(1)"
- line 406, ".input.spin", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1210, "(1)"
- line 397, ".input.spin", state 1236, "(1)"
- line 401, ".input.spin", state 1250, "(1)"
- line 406, ".input.spin", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1309, "(1)"
- line 401, ".input.spin", state 1350, "(1)"
- line 406, ".input.spin", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1409, "(1)"
- line 173, ".input.spin", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1432, "(1)"
- line 177, ".input.spin", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1441, "(1)"
- line 177, ".input.spin", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1442, "else"
- line 175, ".input.spin", state 1447, "((j<1))"
- line 175, ".input.spin", state 1447, "((j>=1))"
- line 181, ".input.spin", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1462, "(1)"
- line 162, ".input.spin", state 1470, "(1)"
- line 162, ".input.spin", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1471, "else"
- line 160, ".input.spin", state 1476, "((j<1))"
- line 160, ".input.spin", state 1476, "((j>=1))"
- line 166, ".input.spin", state 1482, "(1)"
- line 166, ".input.spin", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1483, "else"
- line 168, ".input.spin", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1486, "else"
- line 173, ".input.spin", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 1495, "(1)"
- line 177, ".input.spin", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1504, "(1)"
- line 177, ".input.spin", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 1505, "else"
- line 175, ".input.spin", state 1510, "((j<1))"
- line 175, ".input.spin", state 1510, "((j>=1))"
- line 181, ".input.spin", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1525, "(1)"
- line 162, ".input.spin", state 1533, "(1)"
- line 162, ".input.spin", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 1534, "else"
- line 160, ".input.spin", state 1539, "((j<1))"
- line 160, ".input.spin", state 1539, "((j>=1))"
- line 166, ".input.spin", state 1545, "(1)"
- line 166, ".input.spin", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 1546, "else"
- line 168, ".input.spin", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 1549, "else"
- line 200, ".input.spin", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 1551, "else"
- line 212, ".input.spin", state 1555, "((i<1))"
- line 212, ".input.spin", state 1555, "((i>=1))"
- line 173, ".input.spin", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1562, "(1)"
- line 177, ".input.spin", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1571, "(1)"
- line 177, ".input.spin", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1572, "else"
- line 175, ".input.spin", state 1577, "((j<1))"
- line 175, ".input.spin", state 1577, "((j>=1))"
- line 181, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1592, "(1)"
- line 162, ".input.spin", state 1600, "(1)"
- line 162, ".input.spin", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1601, "else"
- line 160, ".input.spin", state 1606, "((j<1))"
- line 160, ".input.spin", state 1606, "((j>=1))"
- line 166, ".input.spin", state 1612, "(1)"
- line 166, ".input.spin", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1613, "else"
- line 168, ".input.spin", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1616, "else"
- line 200, ".input.spin", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 1618, "else"
- line 219, ".input.spin", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 1619, "else"
- line 354, ".input.spin", state 1625, "((sighand_exec==1))"
- line 354, ".input.spin", state 1625, "else"
- line 360, ".input.spin", state 1628, "sighand_exec = 1"
- line 397, ".input.spin", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 1643, "(1)"
- line 397, ".input.spin", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 1644, "else"
- line 397, ".input.spin", state 1647, "(1)"
- line 401, ".input.spin", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 1657, "(1)"
- line 401, ".input.spin", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 1658, "else"
- line 401, ".input.spin", state 1661, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 399, ".input.spin", state 1667, "((i<1))"
- line 399, ".input.spin", state 1667, "((i>=1))"
- line 406, ".input.spin", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 1686, "(1)"
- line 407, ".input.spin", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 1687, "else"
- line 407, ".input.spin", state 1690, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 411, ".input.spin", state 1699, "(1)"
- line 411, ".input.spin", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 1700, "else"
- line 411, ".input.spin", state 1703, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 409, ".input.spin", state 1709, "((i<1))"
- line 409, ".input.spin", state 1709, "((i>=1))"
- line 416, ".input.spin", state 1716, "(1)"
- line 416, ".input.spin", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1717, "else"
- line 416, ".input.spin", state 1720, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 360, ".input.spin", state 1733, "sighand_exec = 1"
- line 177, ".input.spin", state 1758, "(1)"
- line 181, ".input.spin", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1779, "(1)"
- line 162, ".input.spin", state 1787, "(1)"
- line 166, ".input.spin", state 1799, "(1)"
- line 173, ".input.spin", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1842, "(1)"
- line 162, ".input.spin", state 1850, "(1)"
- line 166, ".input.spin", state 1862, "(1)"
- line 173, ".input.spin", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1909, "(1)"
- line 162, ".input.spin", state 1917, "(1)"
- line 166, ".input.spin", state 1929, "(1)"
- line 700, ".input.spin", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 0.12 seconds
-pan: rate 167733.33 states/second
-pan: avg transition delay 5.6709e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-
-#define NR_READERS 2
-#define NR_WRITERS 1
-
-#define NR_PROCS 3
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-
-#define NR_READERS 2
-#define NR_WRITERS 1
-
-#define NR_PROCS 3
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-spin: line 295 replacement value: tmp
-spin: line 295 ".input.spin", Error: formal par of wait_for_quiescent_state contains replacement value saw '-2'' near 'readerid'
-spin: 1 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_WRITERS 1
-#define NR_READERS 3
-
-/* Number of reader and writer processes */
-#define NR_PROCS 5
-
-/* Includes reader, writer and init process */
-#define MAX_NR_PROCS 5
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
- skip;
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
- skip;
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_writerid() (get_pid())
-#define get_readerid() (get_writerrid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- skip;
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2, nest)
-{
- nest_i = 0;
- do
- :: nest_i < nest ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- ooo_mem(i);
- smp_mb(i);
- nest_i++;
- :: nest_i >= nest -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < nest ->
- ooo_mem(i);
- smp_mb(i);
- ooo_mem(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= nest -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [2] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2, 2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [1] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- ooo_mem(i);
- smp_mb(i);
- ooo_mem(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 566)
-Depth= 4234 States= 1e+06 Transitions= 1.7e+07 Memory= 527.287 t= 31.3 R= 3e+04
-Depth= 4234 States= 2e+06 Transitions= 3.44e+07 Memory= 588.322 t= 63.9 R= 3e+04
-Depth= 4234 States= 3e+06 Transitions= 5.2e+07 Memory= 649.358 t= 97 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 4234 States= 4e+06 Transitions= 6.97e+07 Memory= 741.416 t= 130 R= 3e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4234, errors: 0
- 4027146 states, stored
- 66145121 states, matched
- 70172267 transitions (= stored+matched)
-2.6437688e+08 atomic steps
-hash conflicts: 47318190 (resolved)
-
-Stats on memory usage (in Megabytes):
- 322.609 equivalent memory usage for states (stored*(State-vector + overhead))
- 253.418 actual memory usage for states (compression: 78.55%)
- state-vector as stored = 38 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 743.076 total actual memory usage
-
-unreached in proctype urcu_reader
- line 288, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 61, "(1)"
- line 307, "pan.___", state 91, "(1)"
- line 288, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 149, "(1)"
- line 307, "pan.___", state 179, "(1)"
- line 288, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 238, "(1)"
- line 307, "pan.___", state 268, "(1)"
- line 158, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 291, "(1)"
- line 162, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 300, "(1)"
- line 162, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 301, "else"
- line 160, "pan.___", state 306, "((j<1))"
- line 160, "pan.___", state 306, "((j>=1))"
- line 166, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 321, "(1)"
- line 147, "pan.___", state 329, "(1)"
- line 147, "pan.___", state 330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 330, "else"
- line 145, "pan.___", state 335, "((j<1))"
- line 145, "pan.___", state 335, "((j>=1))"
- line 151, "pan.___", state 341, "(1)"
- line 151, "pan.___", state 342, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 342, "else"
- line 153, "pan.___", state 345, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 345, "else"
- line 185, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 347, "else"
- line 158, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 354, "(1)"
- line 162, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 363, "(1)"
- line 162, "pan.___", state 364, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 364, "else"
- line 160, "pan.___", state 369, "((j<1))"
- line 160, "pan.___", state 369, "((j>=1))"
- line 166, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 384, "(1)"
- line 147, "pan.___", state 392, "(1)"
- line 147, "pan.___", state 393, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 393, "else"
- line 145, "pan.___", state 398, "((j<1))"
- line 145, "pan.___", state 398, "((j>=1))"
- line 151, "pan.___", state 404, "(1)"
- line 151, "pan.___", state 405, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 405, "else"
- line 153, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 408, "else"
- line 185, "pan.___", state 410, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 410, "else"
- line 199, "pan.___", state 414, "((i<1))"
- line 199, "pan.___", state 414, "((i>=1))"
- line 158, "pan.___", state 419, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 421, "(1)"
- line 162, "pan.___", state 428, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 430, "(1)"
- line 162, "pan.___", state 431, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 431, "else"
- line 160, "pan.___", state 436, "((j<1))"
- line 160, "pan.___", state 436, "((j>=1))"
- line 166, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 451, "(1)"
- line 147, "pan.___", state 459, "(1)"
- line 147, "pan.___", state 460, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 460, "else"
- line 145, "pan.___", state 465, "((j<1))"
- line 145, "pan.___", state 465, "((j>=1))"
- line 151, "pan.___", state 471, "(1)"
- line 151, "pan.___", state 472, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 472, "else"
- line 153, "pan.___", state 475, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 475, "else"
- line 185, "pan.___", state 477, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 477, "else"
- line 288, "pan.___", state 492, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 537, "(1)"
- line 307, "pan.___", state 567, "(1)"
- line 288, "pan.___", state 580, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 612, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 625, "(1)"
- line 307, "pan.___", state 655, "(1)"
- line 288, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 713, "(1)"
- line 307, "pan.___", state 743, "(1)"
- line 158, "pan.___", state 758, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 760, "(1)"
- line 162, "pan.___", state 767, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 769, "(1)"
- line 162, "pan.___", state 770, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 770, "else"
- line 160, "pan.___", state 775, "((j<1))"
- line 160, "pan.___", state 775, "((j>=1))"
- line 166, "pan.___", state 780, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 790, "(1)"
- line 147, "pan.___", state 798, "(1)"
- line 147, "pan.___", state 799, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 799, "else"
- line 145, "pan.___", state 804, "((j<1))"
- line 145, "pan.___", state 804, "((j>=1))"
- line 151, "pan.___", state 810, "(1)"
- line 151, "pan.___", state 811, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 811, "else"
- line 153, "pan.___", state 814, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 814, "else"
- line 185, "pan.___", state 816, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 816, "else"
- line 158, "pan.___", state 821, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 823, "(1)"
- line 162, "pan.___", state 830, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 832, "(1)"
- line 162, "pan.___", state 833, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 833, "else"
- line 160, "pan.___", state 838, "((j<1))"
- line 160, "pan.___", state 838, "((j>=1))"
- line 166, "pan.___", state 843, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 853, "(1)"
- line 147, "pan.___", state 861, "(1)"
- line 147, "pan.___", state 862, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 862, "else"
- line 145, "pan.___", state 867, "((j<1))"
- line 145, "pan.___", state 867, "((j>=1))"
- line 151, "pan.___", state 873, "(1)"
- line 151, "pan.___", state 874, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 874, "else"
- line 153, "pan.___", state 877, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 877, "else"
- line 185, "pan.___", state 879, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 879, "else"
- line 199, "pan.___", state 883, "((i<1))"
- line 199, "pan.___", state 883, "((i>=1))"
- line 158, "pan.___", state 888, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 890, "(1)"
- line 162, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 899, "(1)"
- line 162, "pan.___", state 900, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 900, "else"
- line 160, "pan.___", state 905, "((j<1))"
- line 160, "pan.___", state 905, "((j>=1))"
- line 166, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 920, "(1)"
- line 147, "pan.___", state 928, "(1)"
- line 147, "pan.___", state 929, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 929, "else"
- line 145, "pan.___", state 934, "((j<1))"
- line 145, "pan.___", state 934, "((j>=1))"
- line 151, "pan.___", state 940, "(1)"
- line 151, "pan.___", state 941, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 941, "else"
- line 153, "pan.___", state 944, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 944, "else"
- line 185, "pan.___", state 946, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 946, "else"
- line 288, "pan.___", state 956, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 988, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1001, "(1)"
- line 307, "pan.___", state 1031, "(1)"
- line 288, "pan.___", state 1052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1084, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1097, "(1)"
- line 307, "pan.___", state 1127, "(1)"
- line 433, "pan.___", state 1140, "-end-"
- (125 of 1140 states)
-unreached in proctype urcu_writer
- line 288, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 59, "(1)"
- line 302, "pan.___", state 72, "(1)"
- line 307, "pan.___", state 89, "(1)"
- line 288, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 151, "(1)"
- line 302, "pan.___", state 164, "(1)"
- line 467, "pan.___", state 195, "(1)"
- line 158, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 237, "(1)"
- line 147, "pan.___", state 245, "(1)"
- line 151, "pan.___", state 257, "(1)"
- line 158, "pan.___", state 268, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 290, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 300, "(1)"
- line 147, "pan.___", state 308, "(1)"
- line 151, "pan.___", state 320, "(1)"
- line 158, "pan.___", state 335, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 344, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 357, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 367, "(1)"
- line 147, "pan.___", state 375, "(1)"
- line 151, "pan.___", state 387, "(1)"
- line 288, "pan.___", state 403, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 448, "(1)"
- line 302, "pan.___", state 461, "(1)"
- line 307, "pan.___", state 478, "(1)"
- line 288, "pan.___", state 495, "(1)"
- line 292, "pan.___", state 507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 525, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 551, "(1)"
- line 307, "pan.___", state 568, "(1)"
- line 292, "pan.___", state 598, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 642, "(1)"
- line 307, "pan.___", state 659, "(1)"
- line 162, "pan.___", state 681, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 694, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 704, "(1)"
- line 147, "pan.___", state 712, "(1)"
- line 151, "pan.___", state 724, "(1)"
- line 158, "pan.___", state 735, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 757, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 767, "(1)"
- line 147, "pan.___", state 775, "(1)"
- line 151, "pan.___", state 787, "(1)"
- line 158, "pan.___", state 802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 811, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 824, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 834, "(1)"
- line 147, "pan.___", state 842, "(1)"
- line 151, "pan.___", state 854, "(1)"
- line 288, "pan.___", state 878, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 880, "(1)"
- line 288, "pan.___", state 881, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 881, "else"
- line 288, "pan.___", state 884, "(1)"
- line 292, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 894, "(1)"
- line 292, "pan.___", state 895, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 895, "else"
- line 292, "pan.___", state 898, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 290, "pan.___", state 904, "((i<1))"
- line 290, "pan.___", state 904, "((i>=1))"
- line 297, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 923, "(1)"
- line 298, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 924, "else"
- line 298, "pan.___", state 927, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 302, "pan.___", state 936, "(1)"
- line 302, "pan.___", state 937, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 937, "else"
- line 302, "pan.___", state 940, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 300, "pan.___", state 946, "((i<1))"
- line 300, "pan.___", state 946, "((i>=1))"
- line 307, "pan.___", state 953, "(1)"
- line 307, "pan.___", state 954, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 954, "else"
- line 307, "pan.___", state 957, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 292, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1008, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1034, "(1)"
- line 307, "pan.___", state 1051, "(1)"
- line 292, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1096, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1122, "(1)"
- line 307, "pan.___", state 1139, "(1)"
- line 288, "pan.___", state 1156, "(1)"
- line 292, "pan.___", state 1168, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1186, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1212, "(1)"
- line 307, "pan.___", state 1229, "(1)"
- line 292, "pan.___", state 1259, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1277, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1303, "(1)"
- line 307, "pan.___", state 1320, "(1)"
- line 162, "pan.___", state 1342, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1355, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1365, "(1)"
- line 147, "pan.___", state 1373, "(1)"
- line 151, "pan.___", state 1385, "(1)"
- line 158, "pan.___", state 1396, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1418, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1428, "(1)"
- line 147, "pan.___", state 1436, "(1)"
- line 151, "pan.___", state 1448, "(1)"
- line 158, "pan.___", state 1463, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1472, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1485, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1495, "(1)"
- line 147, "pan.___", state 1503, "(1)"
- line 151, "pan.___", state 1515, "(1)"
- line 288, "pan.___", state 1539, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 1541, "(1)"
- line 288, "pan.___", state 1542, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 1542, "else"
- line 288, "pan.___", state 1545, "(1)"
- line 292, "pan.___", state 1553, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 1555, "(1)"
- line 292, "pan.___", state 1556, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 1556, "else"
- line 292, "pan.___", state 1559, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 290, "pan.___", state 1565, "((i<1))"
- line 290, "pan.___", state 1565, "((i>=1))"
- line 297, "pan.___", state 1571, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1584, "(1)"
- line 298, "pan.___", state 1585, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 1585, "else"
- line 298, "pan.___", state 1588, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 302, "pan.___", state 1597, "(1)"
- line 302, "pan.___", state 1598, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 1598, "else"
- line 302, "pan.___", state 1601, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 300, "pan.___", state 1607, "((i<1))"
- line 300, "pan.___", state 1607, "((i>=1))"
- line 307, "pan.___", state 1614, "(1)"
- line 307, "pan.___", state 1615, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 1615, "else"
- line 307, "pan.___", state 1618, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 162, "pan.___", state 1646, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1659, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1669, "(1)"
- line 147, "pan.___", state 1677, "(1)"
- line 151, "pan.___", state 1689, "(1)"
- line 158, "pan.___", state 1700, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1722, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1732, "(1)"
- line 147, "pan.___", state 1740, "(1)"
- line 151, "pan.___", state 1752, "(1)"
- line 158, "pan.___", state 1767, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1776, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1789, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1799, "(1)"
- line 147, "pan.___", state 1807, "(1)"
- line 151, "pan.___", state 1819, "(1)"
- line 510, "pan.___", state 1845, "-end-"
- (158 of 1845 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 571, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 131 seconds
-pan: rate 30683.017 states/second
-pan: avg transition delay 1.8704e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:3013
-2:2:1132
-3:0:3013
-4:1:0
-5:0:3013
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-11:0:3013
-12:3:2969
-13:0:3013
-14:3:2970
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-1595:0:3013
-1596:1:567
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-1600:2:1397
-1601:2:1401
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-1611:0:3013
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-1613:0:3013
-1614:2:1459
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-1616:2:1464
-1617:2:1468
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-1625:2:1502
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-1661:0:3013
-1662:2:1610
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-1664:2:1613
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-1670:2:1640
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-1674:2:1657
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-1679:2:1682
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-1682:0:3013
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-1689:2:1703
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-1698:2:1731
-1699:2:1736
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-1706:2:1762
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-1711:2:1989
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-1713:2:2085
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-1715:2:2086
-1716:0:3013
-1717:2:2090
-1718:0:3013
-1719:2:2096
-1720:2:2100
-1721:2:2101
-1722:2:2109
-1723:2:2110
-1724:2:2114
-1725:2:2115
-1726:2:2123
-1727:2:2128
-1728:2:2132
-1729:2:2133
-1730:2:2140
-1731:2:2141
-1732:2:2152
-1733:2:2153
-1734:2:2154
-1735:2:2165
-1736:2:2170
-1737:2:2171
-1738:0:3013
-1739:2:2183
-1740:0:3013
-1741:2:2184
-1742:2:2188
-1743:2:2189
-1744:2:2197
-1745:2:2198
-1746:2:2202
-1747:2:2203
-1748:2:2211
-1749:2:2216
-1750:2:2220
-1751:2:2221
-1752:2:2228
-1753:2:2229
-1754:2:2240
-1755:2:2241
-1756:2:2242
-1757:2:2253
-1758:2:2258
-1759:2:2259
-1760:0:3013
-1761:2:2271
-1762:0:3013
-1763:2:2274
-1764:2:2275
-1765:2:2287
-1766:2:2288
-1767:2:2292
-1768:2:2293
-1769:2:2301
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-1771:2:2310
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-1773:2:2318
-1774:2:2319
-1775:2:2330
-1776:2:2331
-1777:2:2332
-1778:2:2343
-1779:2:2348
-1780:2:2349
-1781:0:3013
-1782:2:2361
-1783:0:3013
-1784:2:2362
-1785:0:3013
-1786:2:2363
-1787:0:3013
-1788:2:2364
-1789:0:3013
-1790:2:2365
-1791:2:2369
-1792:2:2370
-1793:2:2378
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-1800:2:2402
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-1806:2:2434
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-1809:0:3013
-1810:2:2650
-1811:0:3013
-1812:2:2746
-1813:0:3013
-1814:2:2747
-1815:0:3013
-1816:2:2751
-1817:0:3013
-1818:2:2757
-1819:0:3013
-1820:2:2761
-1821:2:2762
-1822:2:2766
-1823:2:2770
-1824:2:2771
-1825:2:2775
-1826:2:2783
-1827:2:2784
-1828:2:2789
-1829:2:2796
-1830:2:2797
-1831:2:2804
-1832:2:2809
-1833:0:3013
-1834:2:2820
-1835:0:3013
-1836:2:2824
-1837:2:2825
-1838:2:2829
-1839:2:2833
-1840:2:2834
-1841:2:2838
-1842:2:2846
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-1846:2:2860
-1847:2:2867
-1848:2:2872
-1849:0:3013
-1850:2:2883
-1851:0:3013
-1852:2:2891
-1853:2:2892
-1854:2:2896
-1855:2:2900
-1856:2:2901
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-1858:2:2913
-1859:2:2914
-1860:2:2919
-1861:2:2926
-1862:2:2927
-1863:2:2934
-1864:2:2939
-1865:0:3013
-1866:2:2954
-1867:0:3013
-1868:2:2955
-1869:0:3013
-1870:2:2958
-1871:0:3013
-1872:2:2963
-1873:0:3013
-1874:1:568
-1875:1:572
-1876:1:573
-1877:1:581
-1878:1:582
-1879:1:586
-1880:1:587
-1881:1:595
-1882:1:600
-1883:1:604
-1884:1:605
-1885:1:612
-1886:1:613
-1887:1:624
-1888:1:625
-1889:1:626
-1890:1:637
-1891:1:642
-1892:1:643
-1893:0:3013
-1894:2:2964
-1895:0:3013
-1896:1:655
-1897:0:3011
-1898:2:2963
-1899:0:3017
-1900:1:655
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_nested.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 566)
-Depth= 4234 States= 1e+06 Transitions= 1.7e+07 Memory= 527.287 t= 31.2 R= 3e+04
-Depth= 4234 States= 2e+06 Transitions= 3.44e+07 Memory= 588.322 t= 63.7 R= 3e+04
-Depth= 4234 States= 3e+06 Transitions= 5.2e+07 Memory= 649.358 t= 96.8 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 4234 States= 4e+06 Transitions= 6.97e+07 Memory= 741.416 t= 130 R= 3e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4234, errors: 0
- 4027146 states, stored
- 66145121 states, matched
- 70172267 transitions (= stored+matched)
-2.6437688e+08 atomic steps
-hash conflicts: 47318190 (resolved)
-
-Stats on memory usage (in Megabytes):
- 322.609 equivalent memory usage for states (stored*(State-vector + overhead))
- 253.418 actual memory usage for states (compression: 78.55%)
- state-vector as stored = 38 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 743.076 total actual memory usage
-
-unreached in proctype urcu_reader
- line 288, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 61, "(1)"
- line 307, "pan.___", state 91, "(1)"
- line 288, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 149, "(1)"
- line 307, "pan.___", state 179, "(1)"
- line 288, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 238, "(1)"
- line 307, "pan.___", state 268, "(1)"
- line 158, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 291, "(1)"
- line 162, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 300, "(1)"
- line 162, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 301, "else"
- line 160, "pan.___", state 306, "((j<1))"
- line 160, "pan.___", state 306, "((j>=1))"
- line 166, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 321, "(1)"
- line 147, "pan.___", state 329, "(1)"
- line 147, "pan.___", state 330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 330, "else"
- line 145, "pan.___", state 335, "((j<1))"
- line 145, "pan.___", state 335, "((j>=1))"
- line 151, "pan.___", state 341, "(1)"
- line 151, "pan.___", state 342, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 342, "else"
- line 153, "pan.___", state 345, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 345, "else"
- line 185, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 347, "else"
- line 158, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 354, "(1)"
- line 162, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 363, "(1)"
- line 162, "pan.___", state 364, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 364, "else"
- line 160, "pan.___", state 369, "((j<1))"
- line 160, "pan.___", state 369, "((j>=1))"
- line 166, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 384, "(1)"
- line 147, "pan.___", state 392, "(1)"
- line 147, "pan.___", state 393, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 393, "else"
- line 145, "pan.___", state 398, "((j<1))"
- line 145, "pan.___", state 398, "((j>=1))"
- line 151, "pan.___", state 404, "(1)"
- line 151, "pan.___", state 405, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 405, "else"
- line 153, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 408, "else"
- line 185, "pan.___", state 410, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 410, "else"
- line 199, "pan.___", state 414, "((i<1))"
- line 199, "pan.___", state 414, "((i>=1))"
- line 158, "pan.___", state 419, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 421, "(1)"
- line 162, "pan.___", state 428, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 430, "(1)"
- line 162, "pan.___", state 431, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 431, "else"
- line 160, "pan.___", state 436, "((j<1))"
- line 160, "pan.___", state 436, "((j>=1))"
- line 166, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 451, "(1)"
- line 147, "pan.___", state 459, "(1)"
- line 147, "pan.___", state 460, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 460, "else"
- line 145, "pan.___", state 465, "((j<1))"
- line 145, "pan.___", state 465, "((j>=1))"
- line 151, "pan.___", state 471, "(1)"
- line 151, "pan.___", state 472, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 472, "else"
- line 153, "pan.___", state 475, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 475, "else"
- line 185, "pan.___", state 477, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 477, "else"
- line 288, "pan.___", state 492, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 537, "(1)"
- line 307, "pan.___", state 567, "(1)"
- line 288, "pan.___", state 580, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 612, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 625, "(1)"
- line 307, "pan.___", state 655, "(1)"
- line 288, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 713, "(1)"
- line 307, "pan.___", state 743, "(1)"
- line 158, "pan.___", state 758, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 760, "(1)"
- line 162, "pan.___", state 767, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 769, "(1)"
- line 162, "pan.___", state 770, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 770, "else"
- line 160, "pan.___", state 775, "((j<1))"
- line 160, "pan.___", state 775, "((j>=1))"
- line 166, "pan.___", state 780, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 790, "(1)"
- line 147, "pan.___", state 798, "(1)"
- line 147, "pan.___", state 799, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 799, "else"
- line 145, "pan.___", state 804, "((j<1))"
- line 145, "pan.___", state 804, "((j>=1))"
- line 151, "pan.___", state 810, "(1)"
- line 151, "pan.___", state 811, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 811, "else"
- line 153, "pan.___", state 814, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 814, "else"
- line 185, "pan.___", state 816, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 816, "else"
- line 158, "pan.___", state 821, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 823, "(1)"
- line 162, "pan.___", state 830, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 832, "(1)"
- line 162, "pan.___", state 833, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 833, "else"
- line 160, "pan.___", state 838, "((j<1))"
- line 160, "pan.___", state 838, "((j>=1))"
- line 166, "pan.___", state 843, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 853, "(1)"
- line 147, "pan.___", state 861, "(1)"
- line 147, "pan.___", state 862, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 862, "else"
- line 145, "pan.___", state 867, "((j<1))"
- line 145, "pan.___", state 867, "((j>=1))"
- line 151, "pan.___", state 873, "(1)"
- line 151, "pan.___", state 874, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 874, "else"
- line 153, "pan.___", state 877, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 877, "else"
- line 185, "pan.___", state 879, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 879, "else"
- line 199, "pan.___", state 883, "((i<1))"
- line 199, "pan.___", state 883, "((i>=1))"
- line 158, "pan.___", state 888, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 890, "(1)"
- line 162, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 899, "(1)"
- line 162, "pan.___", state 900, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 900, "else"
- line 160, "pan.___", state 905, "((j<1))"
- line 160, "pan.___", state 905, "((j>=1))"
- line 166, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 920, "(1)"
- line 147, "pan.___", state 928, "(1)"
- line 147, "pan.___", state 929, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 929, "else"
- line 145, "pan.___", state 934, "((j<1))"
- line 145, "pan.___", state 934, "((j>=1))"
- line 151, "pan.___", state 940, "(1)"
- line 151, "pan.___", state 941, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 941, "else"
- line 153, "pan.___", state 944, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 944, "else"
- line 185, "pan.___", state 946, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 946, "else"
- line 288, "pan.___", state 956, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 988, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1001, "(1)"
- line 307, "pan.___", state 1031, "(1)"
- line 288, "pan.___", state 1052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1084, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1097, "(1)"
- line 307, "pan.___", state 1127, "(1)"
- line 433, "pan.___", state 1140, "-end-"
- (125 of 1140 states)
-unreached in proctype urcu_writer
- line 288, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 59, "(1)"
- line 302, "pan.___", state 72, "(1)"
- line 307, "pan.___", state 89, "(1)"
- line 288, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 151, "(1)"
- line 302, "pan.___", state 164, "(1)"
- line 467, "pan.___", state 195, "(1)"
- line 158, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 237, "(1)"
- line 147, "pan.___", state 245, "(1)"
- line 151, "pan.___", state 257, "(1)"
- line 158, "pan.___", state 268, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 290, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 300, "(1)"
- line 147, "pan.___", state 308, "(1)"
- line 151, "pan.___", state 320, "(1)"
- line 158, "pan.___", state 335, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 344, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 357, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 367, "(1)"
- line 147, "pan.___", state 375, "(1)"
- line 151, "pan.___", state 387, "(1)"
- line 288, "pan.___", state 403, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 448, "(1)"
- line 302, "pan.___", state 461, "(1)"
- line 307, "pan.___", state 478, "(1)"
- line 288, "pan.___", state 495, "(1)"
- line 292, "pan.___", state 507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 525, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 551, "(1)"
- line 307, "pan.___", state 568, "(1)"
- line 292, "pan.___", state 598, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 642, "(1)"
- line 307, "pan.___", state 659, "(1)"
- line 162, "pan.___", state 681, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 694, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 704, "(1)"
- line 147, "pan.___", state 712, "(1)"
- line 151, "pan.___", state 724, "(1)"
- line 158, "pan.___", state 735, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 757, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 767, "(1)"
- line 147, "pan.___", state 775, "(1)"
- line 151, "pan.___", state 787, "(1)"
- line 158, "pan.___", state 802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 811, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 824, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 834, "(1)"
- line 147, "pan.___", state 842, "(1)"
- line 151, "pan.___", state 854, "(1)"
- line 288, "pan.___", state 878, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 880, "(1)"
- line 288, "pan.___", state 881, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 881, "else"
- line 288, "pan.___", state 884, "(1)"
- line 292, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 894, "(1)"
- line 292, "pan.___", state 895, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 895, "else"
- line 292, "pan.___", state 898, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 290, "pan.___", state 904, "((i<1))"
- line 290, "pan.___", state 904, "((i>=1))"
- line 297, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 923, "(1)"
- line 298, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 924, "else"
- line 298, "pan.___", state 927, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 302, "pan.___", state 936, "(1)"
- line 302, "pan.___", state 937, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 937, "else"
- line 302, "pan.___", state 940, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 300, "pan.___", state 946, "((i<1))"
- line 300, "pan.___", state 946, "((i>=1))"
- line 307, "pan.___", state 953, "(1)"
- line 307, "pan.___", state 954, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 954, "else"
- line 307, "pan.___", state 957, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 292, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1008, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1034, "(1)"
- line 307, "pan.___", state 1051, "(1)"
- line 292, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1096, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1122, "(1)"
- line 307, "pan.___", state 1139, "(1)"
- line 288, "pan.___", state 1156, "(1)"
- line 292, "pan.___", state 1168, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1186, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1212, "(1)"
- line 307, "pan.___", state 1229, "(1)"
- line 292, "pan.___", state 1259, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1277, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1303, "(1)"
- line 307, "pan.___", state 1320, "(1)"
- line 162, "pan.___", state 1342, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1355, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1365, "(1)"
- line 147, "pan.___", state 1373, "(1)"
- line 151, "pan.___", state 1385, "(1)"
- line 158, "pan.___", state 1396, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1418, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1428, "(1)"
- line 147, "pan.___", state 1436, "(1)"
- line 151, "pan.___", state 1448, "(1)"
- line 158, "pan.___", state 1463, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1472, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1485, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1495, "(1)"
- line 147, "pan.___", state 1503, "(1)"
- line 151, "pan.___", state 1515, "(1)"
- line 288, "pan.___", state 1539, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 1541, "(1)"
- line 288, "pan.___", state 1542, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 1542, "else"
- line 288, "pan.___", state 1545, "(1)"
- line 292, "pan.___", state 1553, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 1555, "(1)"
- line 292, "pan.___", state 1556, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 1556, "else"
- line 292, "pan.___", state 1559, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 290, "pan.___", state 1565, "((i<1))"
- line 290, "pan.___", state 1565, "((i>=1))"
- line 297, "pan.___", state 1571, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1584, "(1)"
- line 298, "pan.___", state 1585, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 1585, "else"
- line 298, "pan.___", state 1588, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 302, "pan.___", state 1597, "(1)"
- line 302, "pan.___", state 1598, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 1598, "else"
- line 302, "pan.___", state 1601, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 300, "pan.___", state 1607, "((i<1))"
- line 300, "pan.___", state 1607, "((i>=1))"
- line 307, "pan.___", state 1614, "(1)"
- line 307, "pan.___", state 1615, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 1615, "else"
- line 307, "pan.___", state 1618, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 162, "pan.___", state 1646, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1659, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1669, "(1)"
- line 147, "pan.___", state 1677, "(1)"
- line 151, "pan.___", state 1689, "(1)"
- line 158, "pan.___", state 1700, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1722, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1732, "(1)"
- line 147, "pan.___", state 1740, "(1)"
- line 151, "pan.___", state 1752, "(1)"
- line 158, "pan.___", state 1767, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1776, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1789, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1799, "(1)"
- line 147, "pan.___", state 1807, "(1)"
- line 151, "pan.___", state 1819, "(1)"
- line 510, "pan.___", state 1845, "-end-"
- (158 of 1845 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 571, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 131 seconds
-pan: rate 30755.659 states/second
-pan: avg transition delay 1.866e-06 usec
-cp .input.spin urcu_free_nested.spin.input
-cp .input.spin.trail urcu_free_nested.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:0:2679
-5:3:1129
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-spin: line 291 "pan.___", Error: syntax error saw 'operator: ='
-spin: line 291 "pan.___", Error: syntax error saw 'operator: ='
-spin: 2 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:3537
-2:3:3489
-3:3:3492
-4:3:3492
-5:3:3495
-6:3:3503
-7:3:3503
-8:3:3506
-9:3:3512
-10:3:3516
-11:3:3516
-12:3:3519
-13:3:3527
-14:3:3531
-15:3:3532
-16:0:3537
-17:3:3534
-18:0:3537
-19:2:1310
-20:0:3537
-21:2:1316
-22:0:3537
-23:2:1317
-24:0:3537
-25:2:1318
-26:2:1322
-27:2:1323
-28:2:1331
-29:2:1332
-30:2:1336
-31:2:1337
-32:2:1345
-33:2:1350
-34:2:1354
-35:2:1355
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-37:2:1363
-38:2:1374
-39:2:1375
-40:2:1376
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-42:2:1392
-43:2:1393
-44:0:3537
-45:2:1405
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-49:2:1414
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-51:2:1423
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-53:2:1428
-54:2:1429
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-63:2:1479
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-116:0:3537
-117:2:1691
-118:0:3537
-119:2:1696
-120:2:1700
-121:2:1701
-122:2:1709
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-160:0:3537
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-190:2:1972
-191:2:1976
-192:2:1977
-193:2:1985
-194:2:1986
-195:2:1990
-196:2:1991
-197:2:1999
-198:2:2004
-199:2:2008
-200:2:2009
-201:2:2016
-202:2:2017
-203:2:2028
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-1659:2:2028
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-1661:2:2030
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-1674:0:3537
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-1678:2:2461
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-1681:2:2467
-1682:2:2475
-1683:2:2488
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-1685:2:2492
-1686:2:2493
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-1698:2:2540
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-1710:2:2593
-1711:2:2594
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-1714:2:2613
-1715:2:2614
-1716:0:3537
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-1718:0:3537
-1719:2:2626
-1720:2:2627
-1721:2:2639
-1722:2:2640
-1723:2:2644
-1724:2:2645
-1725:2:2653
-1726:2:2666
-1727:2:2667
-1728:2:2670
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-1730:2:2682
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-1732:2:2684
-1733:2:2695
-1734:2:2700
-1735:2:2703
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-1737:0:3537
-1738:2:2713
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-1740:2:2714
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-1747:2:2721
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-1760:2:2775
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-1764:2:2795
-1765:0:3537
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-1770:2:3183
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-1800:2:3290
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-1805:2:3312
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-1810:2:3341
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-1813:2:3354
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-1818:2:3375
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-1822:2:3385
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-1825:2:3398
-1826:2:3399
-1827:2:3407
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-1829:2:3421
-1830:2:3424
-1831:2:3425
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-1833:2:3437
-1834:2:3438
-1835:2:3449
-1836:2:3454
-1837:2:3457
-1838:2:3458
-1839:0:3537
-1840:2:3474
-1841:0:3537
-1842:2:3475
-1843:0:3537
-1844:2:3478
-1845:0:3537
-1846:2:3483
-1847:0:3537
-1848:1:2
-1849:0:3537
-1850:2:3484
-1851:0:3537
-1852:1:8
-1853:0:3537
-1854:2:3483
-1855:0:3537
-1856:1:9
-1857:0:3537
-1858:2:3484
-1859:0:3537
-1860:1:10
-1861:0:3537
-1862:2:3483
-1863:0:3537
-1864:1:11
-1865:0:3537
-1866:2:3484
-1867:0:3537
-1868:1:12
-1869:1:16
-1870:1:17
-1871:1:25
-1872:1:26
-1873:1:30
-1874:1:31
-1875:1:39
-1876:1:44
-1877:1:48
-1878:1:49
-1879:1:56
-1880:1:57
-1881:1:68
-1882:1:69
-1883:1:70
-1884:1:81
-1885:1:86
-1886:1:87
-1887:0:3537
-1888:2:3483
-1889:0:3537
-1890:1:99
-1891:0:3537
-1892:2:3484
-1893:0:3537
-1894:1:100
-1895:1:104
-1896:1:105
-1897:1:113
-1898:1:114
-1899:1:118
-1900:1:119
-1901:1:127
-1902:1:132
-1903:1:136
-1904:1:137
-1905:1:144
-1906:1:145
-1907:1:156
-1908:1:157
-1909:1:158
-1910:1:169
-1911:1:174
-1912:1:175
-1913:0:3537
-1914:2:3483
-1915:0:3537
-1916:1:187
-1917:0:3537
-1918:2:3484
-1919:0:3537
-1920:1:188
-1921:0:3537
-1922:2:3483
-1923:0:3537
-1924:1:189
-1925:1:193
-1926:1:194
-1927:1:202
-1928:1:203
-1929:1:207
-1930:1:208
-1931:1:216
-1932:1:221
-1933:1:225
-1934:1:226
-1935:1:233
-1936:1:234
-1937:1:245
-1938:1:246
-1939:1:247
-1940:1:258
-1941:1:263
-1942:1:264
-1943:0:3537
-1944:2:3484
-1945:0:3537
-1946:1:276
-1947:0:3537
-1948:2:3483
-1949:0:3537
-1950:1:561
-1951:0:3537
-1952:2:3484
-1953:0:3537
-1954:1:562
-1955:0:3537
-1956:2:3483
-1957:0:3537
-1958:1:11
-1959:0:3537
-1960:2:3484
-1961:0:3537
-1962:1:12
-1963:1:16
-1964:1:17
-1965:1:25
-1966:1:26
-1967:1:27
-1968:1:39
-1969:1:44
-1970:1:48
-1971:1:49
-1972:1:56
-1973:1:57
-1974:1:68
-1975:1:69
-1976:1:70
-1977:1:81
-1978:1:86
-1979:1:87
-1980:0:3537
-1981:2:3483
-1982:0:3537
-1983:1:99
-1984:0:3537
-1985:2:3484
-1986:0:3537
-1987:1:100
-1988:1:104
-1989:1:105
-1990:1:113
-1991:1:114
-1992:1:118
-1993:1:119
-1994:1:127
-1995:1:132
-1996:1:136
-1997:1:137
-1998:1:144
-1999:1:145
-2000:1:156
-2001:1:157
-2002:1:158
-2003:1:169
-2004:1:174
-2005:1:175
-2006:0:3537
-2007:2:3483
-2008:0:3537
-2009:1:279
-2010:0:3537
-2011:2:3484
-2012:0:3537
-2013:1:280
-2014:0:3537
-2015:2:3483
-2016:0:3537
-2017:1:561
-2018:0:3537
-2019:2:3484
-2020:0:3537
-2021:1:562
-2022:0:3537
-2023:2:3483
-2024:0:3537
-2025:1:567
-2026:0:3537
-2027:2:3484
-2028:0:3537
-2029:1:572
-2030:1:576
-2031:1:577
-2032:1:585
-2033:1:586
-2034:1:587
-2035:1:599
-2036:1:604
-2037:1:608
-2038:1:609
-2039:1:616
-2040:1:617
-2041:1:628
-2042:1:629
-2043:1:630
-2044:1:641
-2045:1:646
-2046:1:647
-2047:0:3537
-2048:2:3483
-2049:0:3537
-2050:1:659
-2051:0:3537
-2052:2:3484
-2053:0:3537
-2054:1:660
-2055:1:664
-2056:1:665
-2057:1:673
-2058:1:674
-2059:1:678
-2060:1:679
-2061:1:687
-2062:1:692
-2063:1:696
-2064:1:697
-2065:1:704
-2066:1:705
-2067:1:716
-2068:1:717
-2069:1:718
-2070:1:729
-2071:1:734
-2072:1:735
-2073:0:3537
-2074:2:3483
-2075:0:3537
-2076:1:747
-2077:0:3535
-2078:2:3484
-2079:0:3541
-2080:1:1280
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 567)
-Depth= 5645 States= 1e+06 Transitions= 1.47e+07 Memory= 527.287 t= 27.1 R= 4e+04
-pan: claim violated! (at depth 1736)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 5645, errors: 1
- 1039881 states, stored
- 14441478 states, matched
- 15481359 transitions (= stored+matched)
- 57000435 atomic steps
-hash conflicts: 2892596 (resolved)
-
-Stats on memory usage (in Megabytes):
- 83.303 equivalent memory usage for states (stored*(State-vector + overhead))
- 64.050 actual memory usage for states (compression: 76.89%)
- state-vector as stored = 37 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 529.729 total actual memory usage
-
-unreached in proctype urcu_reader
- line 289, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 61, "(1)"
- line 308, "pan.___", state 91, "(1)"
- line 289, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 149, "(1)"
- line 308, "pan.___", state 179, "(1)"
- line 289, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 238, "(1)"
- line 308, "pan.___", state 268, "(1)"
- line 159, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 291, "(1)"
- line 163, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 300, "(1)"
- line 163, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 301, "else"
- line 161, "pan.___", state 306, "((j<1))"
- line 161, "pan.___", state 306, "((j>=1))"
- line 167, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 313, "(1)"
- line 167, "pan.___", state 314, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 314, "else"
- line 177, "pan.___", state 319, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 319, "else"
- line 159, "pan.___", state 324, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 326, "(1)"
- line 163, "pan.___", state 333, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 335, "(1)"
- line 163, "pan.___", state 336, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 336, "else"
- line 161, "pan.___", state 341, "((j<1))"
- line 161, "pan.___", state 341, "((j>=1))"
- line 167, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 348, "(1)"
- line 167, "pan.___", state 349, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 167, "pan.___", state 349, "else"
- line 177, "pan.___", state 354, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 177, "pan.___", state 354, "else"
- line 200, "pan.___", state 358, "((i<1))"
- line 200, "pan.___", state 358, "((i>=1))"
- line 159, "pan.___", state 363, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 365, "(1)"
- line 163, "pan.___", state 372, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 374, "(1)"
- line 163, "pan.___", state 375, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 375, "else"
- line 161, "pan.___", state 380, "((j<1))"
- line 161, "pan.___", state 380, "((j>=1))"
- line 167, "pan.___", state 385, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 387, "(1)"
- line 167, "pan.___", state 388, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 388, "else"
- line 177, "pan.___", state 393, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 393, "else"
- line 289, "pan.___", state 408, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 440, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 453, "(1)"
- line 308, "pan.___", state 483, "(1)"
- line 289, "pan.___", state 496, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 541, "(1)"
- line 308, "pan.___", state 571, "(1)"
- line 289, "pan.___", state 584, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 629, "(1)"
- line 308, "pan.___", state 659, "(1)"
- line 159, "pan.___", state 674, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 676, "(1)"
- line 163, "pan.___", state 683, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 685, "(1)"
- line 163, "pan.___", state 686, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 686, "else"
- line 161, "pan.___", state 691, "((j<1))"
- line 161, "pan.___", state 691, "((j>=1))"
- line 167, "pan.___", state 696, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 698, "(1)"
- line 167, "pan.___", state 699, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 699, "else"
- line 177, "pan.___", state 704, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 704, "else"
- line 159, "pan.___", state 709, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 711, "(1)"
- line 163, "pan.___", state 718, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 720, "(1)"
- line 163, "pan.___", state 721, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 721, "else"
- line 161, "pan.___", state 726, "((j<1))"
- line 161, "pan.___", state 726, "((j>=1))"
- line 167, "pan.___", state 731, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 733, "(1)"
- line 167, "pan.___", state 734, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 167, "pan.___", state 734, "else"
- line 177, "pan.___", state 739, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 177, "pan.___", state 739, "else"
- line 200, "pan.___", state 743, "((i<1))"
- line 200, "pan.___", state 743, "((i>=1))"
- line 159, "pan.___", state 748, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 750, "(1)"
- line 163, "pan.___", state 757, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 759, "(1)"
- line 163, "pan.___", state 760, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 760, "else"
- line 161, "pan.___", state 765, "((j<1))"
- line 161, "pan.___", state 765, "((j>=1))"
- line 167, "pan.___", state 770, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 773, "else"
- line 177, "pan.___", state 778, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 778, "else"
- line 289, "pan.___", state 788, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 820, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 833, "(1)"
- line 308, "pan.___", state 863, "(1)"
- line 289, "pan.___", state 884, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 916, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 929, "(1)"
- line 308, "pan.___", state 959, "(1)"
- line 434, "pan.___", state 972, "-end-"
- (95 of 972 states)
-unreached in proctype urcu_writer
- line 289, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 20, "(1)"
- line 293, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 34, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 291, "pan.___", state 40, "((i<1))"
- line 291, "pan.___", state 40, "((i>=1))"
- line 298, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 59, "(1)"
- line 299, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 60, "else"
- line 299, "pan.___", state 63, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 303, "pan.___", state 72, "(1)"
- line 303, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 73, "else"
- line 303, "pan.___", state 76, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 301, "pan.___", state 82, "((i<1))"
- line 301, "pan.___", state 82, "((i>=1))"
- line 308, "pan.___", state 89, "(1)"
- line 308, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 90, "else"
- line 308, "pan.___", state 93, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 456, "pan.___", state 101, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 454, "pan.___", state 102, "old_gen = cached_generation_ptr.val[_pid]"
- line 289, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 112, "(1)"
- line 293, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 126, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 299, "pan.___", state 151, "(1)"
- line 303, "pan.___", state 164, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 468, "pan.___", state 195, "(1)"
- line 159, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 240, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 262, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 279, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 288, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 301, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 319, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 333, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 351, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 364, "(1)"
- line 303, "pan.___", state 377, "(1)"
- line 308, "pan.___", state 394, "(1)"
- line 289, "pan.___", state 411, "(1)"
- line 293, "pan.___", state 423, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 467, "(1)"
- line 308, "pan.___", state 484, "(1)"
- line 293, "pan.___", state 514, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 532, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 558, "(1)"
- line 308, "pan.___", state 575, "(1)"
- line 163, "pan.___", state 597, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 610, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 623, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 645, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 662, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 671, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 684, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 710, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 712, "(1)"
- line 289, "pan.___", state 713, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 713, "else"
- line 289, "pan.___", state 716, "(1)"
- line 293, "pan.___", state 724, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 726, "(1)"
- line 293, "pan.___", state 727, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 727, "else"
- line 293, "pan.___", state 730, "(1)"
- line 293, "pan.___", state 731, "(1)"
- line 293, "pan.___", state 731, "(1)"
- line 291, "pan.___", state 736, "((i<1))"
- line 291, "pan.___", state 736, "((i>=1))"
- line 298, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 755, "(1)"
- line 299, "pan.___", state 756, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 756, "else"
- line 299, "pan.___", state 759, "(1)"
- line 299, "pan.___", state 760, "(1)"
- line 299, "pan.___", state 760, "(1)"
- line 303, "pan.___", state 768, "(1)"
- line 303, "pan.___", state 769, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 769, "else"
- line 303, "pan.___", state 772, "(1)"
- line 303, "pan.___", state 773, "(1)"
- line 303, "pan.___", state 773, "(1)"
- line 301, "pan.___", state 778, "((i<1))"
- line 301, "pan.___", state 778, "((i>=1))"
- line 308, "pan.___", state 785, "(1)"
- line 308, "pan.___", state 786, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 786, "else"
- line 308, "pan.___", state 789, "(1)"
- line 308, "pan.___", state 790, "(1)"
- line 308, "pan.___", state 790, "(1)"
- line 310, "pan.___", state 793, "(1)"
- line 310, "pan.___", state 793, "(1)"
- line 293, "pan.___", state 822, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 840, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 866, "(1)"
- line 308, "pan.___", state 883, "(1)"
- line 293, "pan.___", state 910, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 928, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 954, "(1)"
- line 308, "pan.___", state 971, "(1)"
- line 289, "pan.___", state 988, "(1)"
- line 293, "pan.___", state 1000, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1018, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1044, "(1)"
- line 308, "pan.___", state 1061, "(1)"
- line 293, "pan.___", state 1091, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1109, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1135, "(1)"
- line 308, "pan.___", state 1152, "(1)"
- line 163, "pan.___", state 1174, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1187, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1200, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 1222, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1239, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 1248, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1261, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 1287, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 1289, "(1)"
- line 289, "pan.___", state 1290, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 1290, "else"
- line 289, "pan.___", state 1293, "(1)"
- line 293, "pan.___", state 1301, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 1303, "(1)"
- line 293, "pan.___", state 1304, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 1304, "else"
- line 293, "pan.___", state 1307, "(1)"
- line 293, "pan.___", state 1308, "(1)"
- line 293, "pan.___", state 1308, "(1)"
- line 291, "pan.___", state 1313, "((i<1))"
- line 291, "pan.___", state 1313, "((i>=1))"
- line 298, "pan.___", state 1319, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1332, "(1)"
- line 299, "pan.___", state 1333, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 1333, "else"
- line 299, "pan.___", state 1336, "(1)"
- line 299, "pan.___", state 1337, "(1)"
- line 299, "pan.___", state 1337, "(1)"
- line 303, "pan.___", state 1345, "(1)"
- line 303, "pan.___", state 1346, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 1346, "else"
- line 303, "pan.___", state 1349, "(1)"
- line 303, "pan.___", state 1350, "(1)"
- line 303, "pan.___", state 1350, "(1)"
- line 301, "pan.___", state 1355, "((i<1))"
- line 301, "pan.___", state 1355, "((i>=1))"
- line 308, "pan.___", state 1362, "(1)"
- line 308, "pan.___", state 1363, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 1363, "else"
- line 308, "pan.___", state 1366, "(1)"
- line 308, "pan.___", state 1367, "(1)"
- line 308, "pan.___", state 1367, "(1)"
- line 310, "pan.___", state 1370, "(1)"
- line 310, "pan.___", state 1370, "(1)"
- line 163, "pan.___", state 1394, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1407, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1420, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 1442, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1459, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 1468, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1481, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 511, "pan.___", state 1509, "-end-"
- (143 of 1509 states)
-unreached in proctype :init:
- line 518, "pan.___", state 9, "((j<2))"
- line 518, "pan.___", state 9, "((j>=2))"
- line 519, "pan.___", state 20, "((j<2))"
- line 519, "pan.___", state 20, "((j>=2))"
- line 524, "pan.___", state 33, "((j<2))"
- line 524, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 572, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 28.5 seconds
-pan: rate 36487.053 states/second
-pan: avg transition delay 1.8409e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define NO_RMB
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-241:2:2010
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-244:2:2023
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-1443:2:1921
-1444:2:1922
-1445:2:1933
-1446:2:1938
-1447:2:1939
-1448:0:2529
-1449:2:1951
-1450:0:2529
-1451:2:1954
-1452:2:1955
-1453:2:1967
-1454:2:1968
-1455:2:1972
-1456:2:1973
-1457:2:1981
-1458:2:1986
-1459:2:1990
-1460:2:1991
-1461:2:1998
-1462:2:1999
-1463:2:2010
-1464:2:2011
-1465:2:2012
-1466:2:2023
-1467:2:2028
-1468:2:2029
-1469:0:2529
-1470:2:2041
-1471:0:2529
-1472:2:2042
-1473:0:2529
-1474:2:2043
-1475:0:2529
-1476:2:2044
-1477:0:2529
-1478:2:2045
-1479:2:2049
-1480:2:2050
-1481:2:2058
-1482:2:2059
-1483:2:2063
-1484:2:2064
-1485:2:2072
-1486:2:2077
-1487:2:2081
-1488:2:2082
-1489:2:2089
-1490:2:2090
-1491:2:2101
-1492:2:2102
-1493:2:2103
-1494:2:2114
-1495:2:2119
-1496:2:2120
-1497:0:2529
-1498:2:2246
-1499:0:2529
-1500:2:2342
-1501:0:2529
-1502:2:2343
-1503:0:2529
-1504:2:2347
-1505:0:2529
-1506:2:2353
-1507:0:2529
-1508:2:2357
-1509:2:2358
-1510:2:2362
-1511:2:2366
-1512:2:2367
-1513:2:2371
-1514:2:2379
-1515:2:2380
-1516:0:2529
-1517:2:2388
-1518:0:2529
-1519:2:2392
-1520:2:2393
-1521:2:2397
-1522:2:2401
-1523:2:2402
-1524:2:2406
-1525:2:2414
-1526:2:2415
-1527:0:2529
-1528:2:2423
-1529:0:2529
-1530:2:2431
-1531:2:2432
-1532:2:2436
-1533:2:2440
-1534:2:2441
-1535:2:2445
-1536:2:2453
-1537:2:2454
-1538:0:2529
-1539:2:2466
-1540:0:2529
-1541:2:2467
-1542:0:2529
-1543:2:2470
-1544:0:2529
-1545:2:2475
-1546:0:2529
-1547:1:99
-1548:0:2529
-1549:2:2476
-1550:0:2529
-1551:1:100
-1552:1:104
-1553:1:105
-1554:1:113
-1555:1:114
-1556:1:118
-1557:1:119
-1558:1:127
-1559:1:132
-1560:1:136
-1561:1:137
-1562:1:144
-1563:1:145
-1564:1:156
-1565:1:157
-1566:1:158
-1567:1:169
-1568:1:181
-1569:1:182
-1570:0:2529
-1571:2:2475
-1572:0:2529
-1573:1:187
-1574:0:2529
-1575:2:2476
-1576:0:2529
-1577:1:188
-1578:0:2529
-1579:2:2475
-1580:0:2529
-1581:1:189
-1582:1:193
-1583:1:194
-1584:1:202
-1585:1:203
-1586:1:207
-1587:1:208
-1588:1:216
-1589:1:221
-1590:1:225
-1591:1:226
-1592:1:233
-1593:1:234
-1594:1:245
-1595:1:246
-1596:1:247
-1597:1:258
-1598:1:270
-1599:1:271
-1600:0:2529
-1601:2:2476
-1602:0:2529
-1603:1:276
-1604:0:2529
-1605:2:2475
-1606:0:2529
-1607:1:393
-1608:0:2529
-1609:2:2476
-1610:0:2529
-1611:1:394
-1612:0:2529
-1613:2:2475
-1614:0:2529
-1615:1:11
-1616:0:2529
-1617:2:2476
-1618:0:2529
-1619:1:12
-1620:1:16
-1621:1:17
-1622:1:25
-1623:1:26
-1624:1:27
-1625:1:39
-1626:1:44
-1627:1:48
-1628:1:49
-1629:1:56
-1630:1:57
-1631:1:68
-1632:1:69
-1633:1:70
-1634:1:81
-1635:1:93
-1636:1:94
-1637:0:2529
-1638:2:2475
-1639:0:2529
-1640:1:99
-1641:0:2529
-1642:2:2476
-1643:0:2529
-1644:1:100
-1645:1:104
-1646:1:105
-1647:1:113
-1648:1:114
-1649:1:118
-1650:1:119
-1651:1:127
-1652:1:132
-1653:1:136
-1654:1:137
-1655:1:144
-1656:1:145
-1657:1:156
-1658:1:157
-1659:1:158
-1660:1:169
-1661:1:181
-1662:1:182
-1663:0:2529
-1664:2:2475
-1665:0:2529
-1666:1:279
-1667:0:2529
-1668:2:2476
-1669:0:2529
-1670:1:280
-1671:0:2529
-1672:2:2475
-1673:0:2529
-1674:1:393
-1675:0:2529
-1676:2:2476
-1677:0:2529
-1678:1:394
-1679:0:2529
-1680:2:2475
-1681:0:2529
-1682:1:399
-1683:0:2529
-1684:2:2476
-1685:0:2529
-1686:1:404
-1687:1:408
-1688:1:409
-1689:1:417
-1690:1:418
-1691:1:419
-1692:1:431
-1693:1:436
-1694:1:440
-1695:1:441
-1696:1:448
-1697:1:449
-1698:1:460
-1699:1:461
-1700:1:462
-1701:1:473
-1702:1:485
-1703:1:486
-1704:0:2529
-1705:2:2475
-1706:0:2529
-1707:1:491
-1708:0:2529
-1709:2:2476
-1710:0:2529
-1711:1:492
-1712:1:496
-1713:1:497
-1714:1:505
-1715:1:506
-1716:1:510
-1717:1:511
-1718:1:519
-1719:1:524
-1720:1:528
-1721:1:529
-1722:1:536
-1723:1:537
-1724:1:548
-1725:1:549
-1726:1:550
-1727:1:561
-1728:1:566
-1729:1:567
-1730:0:2529
-1731:2:2475
-1732:0:2529
-1733:1:579
-1734:0:2527
-1735:2:2476
-1736:0:2533
-1737:1:662
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 567)
-pan: claim violated! (at depth 1889)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 6646, errors: 1
- 377244 states, stored
- 5291719 states, matched
- 5668963 transitions (= stored+matched)
- 20822372 atomic steps
-hash conflicts: 405371 (resolved)
-
-Stats on memory usage (in Megabytes):
- 30.221 equivalent memory usage for states (stored*(State-vector + overhead))
- 23.526 actual memory usage for states (compression: 77.85%)
- state-vector as stored = 37 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 489.201 total actual memory usage
-
-unreached in proctype urcu_reader
- line 289, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 61, "(1)"
- line 308, "pan.___", state 91, "(1)"
- line 289, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 149, "(1)"
- line 308, "pan.___", state 179, "(1)"
- line 289, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 238, "(1)"
- line 308, "pan.___", state 268, "(1)"
- line 144, "pan.___", state 290, "(1)"
- line 148, "pan.___", state 298, "(1)"
- line 148, "pan.___", state 299, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 299, "else"
- line 146, "pan.___", state 304, "((j<1))"
- line 146, "pan.___", state 304, "((j>=1))"
- line 152, "pan.___", state 310, "(1)"
- line 152, "pan.___", state 311, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 311, "else"
- line 186, "pan.___", state 316, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 316, "else"
- line 144, "pan.___", state 322, "(1)"
- line 148, "pan.___", state 330, "(1)"
- line 148, "pan.___", state 331, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 331, "else"
- line 146, "pan.___", state 336, "((j<1))"
- line 146, "pan.___", state 336, "((j>=1))"
- line 152, "pan.___", state 342, "(1)"
- line 152, "pan.___", state 343, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 343, "else"
- line 186, "pan.___", state 348, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 186, "pan.___", state 348, "else"
- line 200, "pan.___", state 352, "((i<1))"
- line 200, "pan.___", state 352, "((i>=1))"
- line 144, "pan.___", state 358, "(1)"
- line 148, "pan.___", state 366, "(1)"
- line 148, "pan.___", state 367, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 367, "else"
- line 146, "pan.___", state 372, "((j<1))"
- line 146, "pan.___", state 372, "((j>=1))"
- line 152, "pan.___", state 378, "(1)"
- line 152, "pan.___", state 379, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 379, "else"
- line 186, "pan.___", state 384, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 384, "else"
- line 289, "pan.___", state 399, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 415, "(1)"
- line 298, "pan.___", state 431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 444, "(1)"
- line 308, "pan.___", state 474, "(1)"
- line 289, "pan.___", state 487, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 519, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 532, "(1)"
- line 308, "pan.___", state 562, "(1)"
- line 289, "pan.___", state 575, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 607, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 620, "(1)"
- line 308, "pan.___", state 650, "(1)"
- line 144, "pan.___", state 666, "(1)"
- line 148, "pan.___", state 674, "(1)"
- line 148, "pan.___", state 675, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 675, "else"
- line 146, "pan.___", state 680, "((j<1))"
- line 146, "pan.___", state 680, "((j>=1))"
- line 152, "pan.___", state 686, "(1)"
- line 152, "pan.___", state 687, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 687, "else"
- line 186, "pan.___", state 692, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 692, "else"
- line 144, "pan.___", state 698, "(1)"
- line 148, "pan.___", state 706, "(1)"
- line 148, "pan.___", state 707, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 707, "else"
- line 146, "pan.___", state 712, "((j<1))"
- line 146, "pan.___", state 712, "((j>=1))"
- line 152, "pan.___", state 718, "(1)"
- line 152, "pan.___", state 719, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 719, "else"
- line 186, "pan.___", state 724, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 186, "pan.___", state 724, "else"
- line 200, "pan.___", state 728, "((i<1))"
- line 200, "pan.___", state 728, "((i>=1))"
- line 144, "pan.___", state 734, "(1)"
- line 148, "pan.___", state 742, "(1)"
- line 148, "pan.___", state 743, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 743, "else"
- line 146, "pan.___", state 748, "((j<1))"
- line 146, "pan.___", state 748, "((j>=1))"
- line 152, "pan.___", state 754, "(1)"
- line 152, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 755, "else"
- line 186, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 760, "else"
- line 289, "pan.___", state 770, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 802, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 815, "(1)"
- line 308, "pan.___", state 845, "(1)"
- line 289, "pan.___", state 866, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 882, "(1)"
- line 298, "pan.___", state 898, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 911, "(1)"
- line 308, "pan.___", state 941, "(1)"
- line 434, "pan.___", state 954, "-end-"
- (79 of 954 states)
-unreached in proctype urcu_writer
- line 289, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 20, "(1)"
- line 293, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 34, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 291, "pan.___", state 40, "((i<1))"
- line 291, "pan.___", state 40, "((i>=1))"
- line 298, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 59, "(1)"
- line 299, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 60, "else"
- line 299, "pan.___", state 63, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 303, "pan.___", state 72, "(1)"
- line 303, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 73, "else"
- line 303, "pan.___", state 76, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 301, "pan.___", state 82, "((i<1))"
- line 301, "pan.___", state 82, "((i>=1))"
- line 308, "pan.___", state 89, "(1)"
- line 308, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 90, "else"
- line 308, "pan.___", state 93, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 456, "pan.___", state 101, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 454, "pan.___", state 102, "old_gen = cached_generation_ptr.val[_pid]"
- line 289, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 112, "(1)"
- line 293, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 126, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 291, "pan.___", state 132, "((i<1))"
- line 291, "pan.___", state 132, "((i>=1))"
- line 299, "pan.___", state 151, "(1)"
- line 299, "pan.___", state 152, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 152, "else"
- line 299, "pan.___", state 155, "(1)"
- line 299, "pan.___", state 156, "(1)"
- line 299, "pan.___", state 156, "(1)"
- line 303, "pan.___", state 164, "(1)"
- line 303, "pan.___", state 165, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 165, "else"
- line 303, "pan.___", state 168, "(1)"
- line 303, "pan.___", state 169, "(1)"
- line 303, "pan.___", state 169, "(1)"
- line 301, "pan.___", state 174, "((i<1))"
- line 301, "pan.___", state 174, "((i>=1))"
- line 308, "pan.___", state 181, "(1)"
- line 308, "pan.___", state 182, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 182, "else"
- line 308, "pan.___", state 185, "(1)"
- line 308, "pan.___", state 186, "(1)"
- line 308, "pan.___", state 186, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 468, "pan.___", state 195, "(1)"
- line 462, "pan.___", state 198, "((write_lock==0))"
- line 462, "pan.___", state 198, "else"
- line 460, "pan.___", state 199, "(1)"
- line 144, "pan.___", state 206, "(1)"
- line 148, "pan.___", state 214, "(1)"
- line 148, "pan.___", state 215, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 215, "else"
- line 146, "pan.___", state 220, "((j<1))"
- line 146, "pan.___", state 220, "((j>=1))"
- line 152, "pan.___", state 226, "(1)"
- line 152, "pan.___", state 227, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 227, "else"
- line 186, "pan.___", state 232, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 232, "else"
- line 144, "pan.___", state 238, "(1)"
- line 152, "pan.___", state 258, "(1)"
- line 144, "pan.___", state 274, "(1)"
- line 148, "pan.___", state 282, "(1)"
- line 152, "pan.___", state 294, "(1)"
- line 289, "pan.___", state 310, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 324, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 342, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 355, "(1)"
- line 303, "pan.___", state 368, "(1)"
- line 308, "pan.___", state 385, "(1)"
- line 289, "pan.___", state 402, "(1)"
- line 293, "pan.___", state 414, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 432, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 458, "(1)"
- line 308, "pan.___", state 475, "(1)"
- line 293, "pan.___", state 505, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 523, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 549, "(1)"
- line 308, "pan.___", state 566, "(1)"
- line 148, "pan.___", state 588, "(1)"
- line 152, "pan.___", state 600, "(1)"
- line 144, "pan.___", state 612, "(1)"
- line 152, "pan.___", state 632, "(1)"
- line 148, "pan.___", state 656, "(1)"
- line 152, "pan.___", state 668, "(1)"
- line 289, "pan.___", state 692, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 694, "(1)"
- line 289, "pan.___", state 695, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 695, "else"
- line 289, "pan.___", state 698, "(1)"
- line 293, "pan.___", state 706, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 708, "(1)"
- line 293, "pan.___", state 709, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 709, "else"
- line 293, "pan.___", state 712, "(1)"
- line 293, "pan.___", state 713, "(1)"
- line 293, "pan.___", state 713, "(1)"
- line 291, "pan.___", state 718, "((i<1))"
- line 291, "pan.___", state 718, "((i>=1))"
- line 298, "pan.___", state 724, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 737, "(1)"
- line 299, "pan.___", state 738, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 738, "else"
- line 299, "pan.___", state 741, "(1)"
- line 299, "pan.___", state 742, "(1)"
- line 299, "pan.___", state 742, "(1)"
- line 303, "pan.___", state 750, "(1)"
- line 303, "pan.___", state 751, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 751, "else"
- line 303, "pan.___", state 754, "(1)"
- line 303, "pan.___", state 755, "(1)"
- line 303, "pan.___", state 755, "(1)"
- line 301, "pan.___", state 760, "((i<1))"
- line 301, "pan.___", state 760, "((i>=1))"
- line 308, "pan.___", state 767, "(1)"
- line 308, "pan.___", state 768, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 768, "else"
- line 308, "pan.___", state 771, "(1)"
- line 308, "pan.___", state 772, "(1)"
- line 308, "pan.___", state 772, "(1)"
- line 310, "pan.___", state 775, "(1)"
- line 310, "pan.___", state 775, "(1)"
- line 293, "pan.___", state 804, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 822, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 848, "(1)"
- line 308, "pan.___", state 865, "(1)"
- line 293, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 936, "(1)"
- line 308, "pan.___", state 953, "(1)"
- line 289, "pan.___", state 970, "(1)"
- line 293, "pan.___", state 982, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1000, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1026, "(1)"
- line 308, "pan.___", state 1043, "(1)"
- line 293, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1117, "(1)"
- line 308, "pan.___", state 1134, "(1)"
- line 148, "pan.___", state 1156, "(1)"
- line 152, "pan.___", state 1168, "(1)"
- line 144, "pan.___", state 1180, "(1)"
- line 152, "pan.___", state 1200, "(1)"
- line 148, "pan.___", state 1224, "(1)"
- line 152, "pan.___", state 1236, "(1)"
- line 289, "pan.___", state 1260, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 1262, "(1)"
- line 289, "pan.___", state 1263, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 1263, "else"
- line 289, "pan.___", state 1266, "(1)"
- line 293, "pan.___", state 1274, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 1276, "(1)"
- line 293, "pan.___", state 1277, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 1277, "else"
- line 293, "pan.___", state 1280, "(1)"
- line 293, "pan.___", state 1281, "(1)"
- line 293, "pan.___", state 1281, "(1)"
- line 291, "pan.___", state 1286, "((i<1))"
- line 291, "pan.___", state 1286, "((i>=1))"
- line 298, "pan.___", state 1292, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1305, "(1)"
- line 299, "pan.___", state 1306, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 1306, "else"
- line 299, "pan.___", state 1309, "(1)"
- line 299, "pan.___", state 1310, "(1)"
- line 299, "pan.___", state 1310, "(1)"
- line 303, "pan.___", state 1318, "(1)"
- line 303, "pan.___", state 1319, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 1319, "else"
- line 303, "pan.___", state 1322, "(1)"
- line 303, "pan.___", state 1323, "(1)"
- line 303, "pan.___", state 1323, "(1)"
- line 301, "pan.___", state 1328, "((i<1))"
- line 301, "pan.___", state 1328, "((i>=1))"
- line 308, "pan.___", state 1335, "(1)"
- line 308, "pan.___", state 1336, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 1336, "else"
- line 308, "pan.___", state 1339, "(1)"
- line 308, "pan.___", state 1340, "(1)"
- line 308, "pan.___", state 1340, "(1)"
- line 310, "pan.___", state 1343, "(1)"
- line 310, "pan.___", state 1343, "(1)"
- line 148, "pan.___", state 1367, "(1)"
- line 152, "pan.___", state 1379, "(1)"
- line 144, "pan.___", state 1391, "(1)"
- line 152, "pan.___", state 1411, "(1)"
- line 148, "pan.___", state 1435, "(1)"
- line 152, "pan.___", state 1447, "(1)"
- line 511, "pan.___", state 1473, "-end-"
- (159 of 1473 states)
-unreached in proctype :init:
- line 518, "pan.___", state 9, "((j<2))"
- line 518, "pan.___", state 9, "((j>=2))"
- line 519, "pan.___", state 20, "((j<2))"
- line 519, "pan.___", state 20, "((j>=2))"
- line 524, "pan.___", state 33, "((j<2))"
- line 524, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 572, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 10.4 seconds
-pan: rate 36378.399 states/second
-pan: avg transition delay 1.8293e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define NO_WMB
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2475
-2:3:2427
-3:3:2430
-4:3:2430
-5:3:2433
-6:3:2441
-7:3:2441
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-11:3:2454
-12:3:2457
-13:3:2465
-14:3:2469
-15:3:2470
-16:0:2475
-17:3:2472
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-19:2:956
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-21:2:962
-22:0:2475
-23:2:963
-24:0:2475
-25:2:964
-26:2:968
-27:2:969
-28:2:977
-29:2:978
-30:2:982
-31:2:983
-32:2:991
-33:2:996
-34:2:1000
-35:2:1001
-36:2:1008
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-39:2:1021
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-44:0:2475
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-1710:2:1459
-1711:2:1460
-1712:2:1468
-1713:2:1473
-1714:2:1477
-1715:2:1478
-1716:2:1485
-1717:2:1486
-1718:2:1497
-1719:2:1498
-1720:2:1499
-1721:2:1510
-1722:2:1515
-1723:2:1516
-1724:0:2475
-1725:2:1633
-1726:0:2475
-1727:2:1729
-1728:0:2475
-1729:2:1730
-1730:0:2475
-1731:2:1734
-1732:0:2475
-1733:2:1740
-1734:2:1744
-1735:2:1745
-1736:2:1753
-1737:2:1754
-1738:2:1758
-1739:2:1759
-1740:2:1767
-1741:2:1772
-1742:2:1776
-1743:2:1777
-1744:2:1784
-1745:2:1785
-1746:2:1796
-1747:2:1797
-1748:2:1798
-1749:2:1809
-1750:2:1814
-1751:2:1815
-1752:0:2475
-1753:2:1827
-1754:0:2475
-1755:2:1828
-1756:2:1832
-1757:2:1833
-1758:2:1841
-1759:2:1842
-1760:2:1846
-1761:2:1847
-1762:2:1855
-1763:2:1860
-1764:2:1864
-1765:2:1865
-1766:2:1872
-1767:2:1873
-1768:2:1884
-1769:2:1885
-1770:2:1886
-1771:2:1897
-1772:2:1902
-1773:2:1903
-1774:0:2475
-1775:2:1915
-1776:0:2475
-1777:2:1918
-1778:2:1919
-1779:2:1931
-1780:2:1932
-1781:2:1936
-1782:2:1937
-1783:2:1945
-1784:2:1950
-1785:2:1954
-1786:2:1955
-1787:2:1962
-1788:2:1963
-1789:2:1974
-1790:2:1975
-1791:2:1976
-1792:2:1987
-1793:2:1992
-1794:2:1993
-1795:0:2475
-1796:2:2005
-1797:0:2475
-1798:2:2006
-1799:0:2475
-1800:2:2007
-1801:0:2475
-1802:2:2008
-1803:0:2475
-1804:2:2009
-1805:2:2013
-1806:2:2014
-1807:2:2022
-1808:2:2023
-1809:2:2027
-1810:2:2028
-1811:2:2036
-1812:2:2041
-1813:2:2045
-1814:2:2046
-1815:2:2053
-1816:2:2054
-1817:2:2065
-1818:2:2066
-1819:2:2067
-1820:2:2078
-1821:2:2083
-1822:2:2084
-1823:0:2475
-1824:2:2201
-1825:0:2475
-1826:2:2297
-1827:0:2475
-1828:2:2298
-1829:0:2475
-1830:2:2302
-1831:0:2475
-1832:2:2308
-1833:0:2475
-1834:2:2309
-1835:2:2316
-1836:2:2317
-1837:2:2324
-1838:2:2329
-1839:0:2475
-1840:2:2340
-1841:0:2475
-1842:2:2341
-1843:2:2348
-1844:2:2351
-1845:2:2352
-1846:2:2356
-1847:2:2361
-1848:0:2475
-1849:2:2372
-1850:0:2475
-1851:2:2377
-1852:2:2384
-1853:2:2385
-1854:2:2392
-1855:2:2397
-1856:0:2475
-1857:2:2412
-1858:0:2475
-1859:2:2413
-1860:0:2475
-1861:2:2416
-1862:0:2475
-1863:2:2421
-1864:0:2475
-1865:1:483
-1866:1:487
-1867:1:488
-1868:1:496
-1869:1:497
-1870:1:498
-1871:1:510
-1872:1:515
-1873:1:519
-1874:1:520
-1875:1:527
-1876:1:528
-1877:1:539
-1878:1:540
-1879:1:541
-1880:1:552
-1881:1:557
-1882:1:558
-1883:0:2475
-1884:2:2422
-1885:0:2475
-1886:1:570
-1887:0:2473
-1888:2:2421
-1889:0:2479
-1890:1:151
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 567)
-pan: claim violated! (at depth 1353)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3705, errors: 1
- 216253 states, stored
- 2924019 states, matched
- 3140272 transitions (= stored+matched)
- 11791015 atomic steps
-hash conflicts: 155585 (resolved)
-
-Stats on memory usage (in Megabytes):
- 17.324 equivalent memory usage for states (stored*(State-vector + overhead))
- 13.576 actual memory usage for states (compression: 78.37%)
- state-vector as stored = 38 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 479.338 total actual memory usage
-
-unreached in proctype urcu_reader
- line 289, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 61, "(1)"
- line 308, "pan.___", state 91, "(1)"
- line 289, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 149, "(1)"
- line 308, "pan.___", state 179, "(1)"
- line 289, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 238, "(1)"
- line 308, "pan.___", state 268, "(1)"
- line 159, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 291, "(1)"
- line 163, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 300, "(1)"
- line 163, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 301, "else"
- line 161, "pan.___", state 306, "((j<1))"
- line 161, "pan.___", state 306, "((j>=1))"
- line 167, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 321, "(1)"
- line 148, "pan.___", state 329, "(1)"
- line 148, "pan.___", state 330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 330, "else"
- line 146, "pan.___", state 335, "((j<1))"
- line 146, "pan.___", state 335, "((j>=1))"
- line 152, "pan.___", state 341, "(1)"
- line 152, "pan.___", state 342, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 342, "else"
- line 154, "pan.___", state 345, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 345, "else"
- line 186, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 347, "else"
- line 159, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 354, "(1)"
- line 163, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 363, "(1)"
- line 163, "pan.___", state 364, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 364, "else"
- line 161, "pan.___", state 369, "((j<1))"
- line 161, "pan.___", state 369, "((j>=1))"
- line 167, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 384, "(1)"
- line 148, "pan.___", state 392, "(1)"
- line 148, "pan.___", state 393, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 393, "else"
- line 146, "pan.___", state 398, "((j<1))"
- line 146, "pan.___", state 398, "((j>=1))"
- line 152, "pan.___", state 404, "(1)"
- line 152, "pan.___", state 405, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 405, "else"
- line 154, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 154, "pan.___", state 408, "else"
- line 186, "pan.___", state 410, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 186, "pan.___", state 410, "else"
- line 200, "pan.___", state 414, "((i<1))"
- line 200, "pan.___", state 414, "((i>=1))"
- line 159, "pan.___", state 419, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 421, "(1)"
- line 163, "pan.___", state 428, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 430, "(1)"
- line 163, "pan.___", state 431, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 431, "else"
- line 161, "pan.___", state 436, "((j<1))"
- line 161, "pan.___", state 436, "((j>=1))"
- line 167, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 451, "(1)"
- line 148, "pan.___", state 459, "(1)"
- line 148, "pan.___", state 460, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 460, "else"
- line 146, "pan.___", state 465, "((j<1))"
- line 146, "pan.___", state 465, "((j>=1))"
- line 152, "pan.___", state 471, "(1)"
- line 152, "pan.___", state 472, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 472, "else"
- line 154, "pan.___", state 475, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 475, "else"
- line 186, "pan.___", state 477, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 477, "else"
- line 289, "pan.___", state 492, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 537, "(1)"
- line 308, "pan.___", state 567, "(1)"
- line 289, "pan.___", state 580, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 612, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 625, "(1)"
- line 308, "pan.___", state 655, "(1)"
- line 289, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 713, "(1)"
- line 308, "pan.___", state 743, "(1)"
- line 159, "pan.___", state 758, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 767, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 769, "(1)"
- line 163, "pan.___", state 770, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 770, "else"
- line 161, "pan.___", state 775, "((j<1))"
- line 161, "pan.___", state 775, "((j>=1))"
- line 167, "pan.___", state 780, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 790, "(1)"
- line 148, "pan.___", state 798, "(1)"
- line 148, "pan.___", state 799, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 799, "else"
- line 146, "pan.___", state 804, "((j<1))"
- line 146, "pan.___", state 804, "((j>=1))"
- line 152, "pan.___", state 810, "(1)"
- line 152, "pan.___", state 811, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 811, "else"
- line 154, "pan.___", state 814, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 814, "else"
- line 186, "pan.___", state 816, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 816, "else"
- line 159, "pan.___", state 821, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 830, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 832, "(1)"
- line 163, "pan.___", state 833, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 833, "else"
- line 161, "pan.___", state 838, "((j<1))"
- line 161, "pan.___", state 838, "((j>=1))"
- line 167, "pan.___", state 843, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 853, "(1)"
- line 148, "pan.___", state 861, "(1)"
- line 148, "pan.___", state 862, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 862, "else"
- line 146, "pan.___", state 867, "((j<1))"
- line 146, "pan.___", state 867, "((j>=1))"
- line 152, "pan.___", state 873, "(1)"
- line 152, "pan.___", state 874, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 874, "else"
- line 154, "pan.___", state 877, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 154, "pan.___", state 877, "else"
- line 186, "pan.___", state 879, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 186, "pan.___", state 879, "else"
- line 200, "pan.___", state 883, "((i<1))"
- line 200, "pan.___", state 883, "((i>=1))"
- line 159, "pan.___", state 888, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 899, "(1)"
- line 163, "pan.___", state 900, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 900, "else"
- line 161, "pan.___", state 905, "((j<1))"
- line 161, "pan.___", state 905, "((j>=1))"
- line 167, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 920, "(1)"
- line 148, "pan.___", state 928, "(1)"
- line 148, "pan.___", state 929, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 929, "else"
- line 146, "pan.___", state 934, "((j<1))"
- line 146, "pan.___", state 934, "((j>=1))"
- line 152, "pan.___", state 940, "(1)"
- line 152, "pan.___", state 941, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 941, "else"
- line 154, "pan.___", state 944, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 944, "else"
- line 186, "pan.___", state 946, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 946, "else"
- line 289, "pan.___", state 956, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 988, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1001, "(1)"
- line 308, "pan.___", state 1031, "(1)"
- line 289, "pan.___", state 1052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1084, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1097, "(1)"
- line 308, "pan.___", state 1127, "(1)"
- line 434, "pan.___", state 1140, "-end-"
- (125 of 1140 states)
-unreached in proctype urcu_writer
- line 289, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 59, "(1)"
- line 303, "pan.___", state 72, "(1)"
- line 308, "pan.___", state 89, "(1)"
- line 289, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 151, "(1)"
- line 303, "pan.___", state 164, "(1)"
- line 468, "pan.___", state 195, "(1)"
- line 159, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 237, "(1)"
- line 148, "pan.___", state 245, "(1)"
- line 152, "pan.___", state 257, "(1)"
- line 159, "pan.___", state 268, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 290, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 300, "(1)"
- line 148, "pan.___", state 308, "(1)"
- line 152, "pan.___", state 320, "(1)"
- line 159, "pan.___", state 335, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 344, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 357, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 367, "(1)"
- line 148, "pan.___", state 375, "(1)"
- line 152, "pan.___", state 387, "(1)"
- line 289, "pan.___", state 403, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 448, "(1)"
- line 303, "pan.___", state 461, "(1)"
- line 308, "pan.___", state 478, "(1)"
- line 289, "pan.___", state 495, "(1)"
- line 293, "pan.___", state 507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 525, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 551, "(1)"
- line 308, "pan.___", state 568, "(1)"
- line 293, "pan.___", state 598, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 642, "(1)"
- line 308, "pan.___", state 659, "(1)"
- line 163, "pan.___", state 681, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 694, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 704, "(1)"
- line 148, "pan.___", state 712, "(1)"
- line 152, "pan.___", state 724, "(1)"
- line 159, "pan.___", state 735, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 757, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 767, "(1)"
- line 148, "pan.___", state 775, "(1)"
- line 152, "pan.___", state 787, "(1)"
- line 159, "pan.___", state 802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 811, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 824, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 834, "(1)"
- line 148, "pan.___", state 842, "(1)"
- line 152, "pan.___", state 854, "(1)"
- line 289, "pan.___", state 878, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 880, "(1)"
- line 289, "pan.___", state 881, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 881, "else"
- line 289, "pan.___", state 884, "(1)"
- line 293, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 894, "(1)"
- line 293, "pan.___", state 895, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 895, "else"
- line 293, "pan.___", state 898, "(1)"
- line 293, "pan.___", state 899, "(1)"
- line 293, "pan.___", state 899, "(1)"
- line 291, "pan.___", state 904, "((i<1))"
- line 291, "pan.___", state 904, "((i>=1))"
- line 298, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 923, "(1)"
- line 299, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 924, "else"
- line 299, "pan.___", state 927, "(1)"
- line 299, "pan.___", state 928, "(1)"
- line 299, "pan.___", state 928, "(1)"
- line 303, "pan.___", state 936, "(1)"
- line 303, "pan.___", state 937, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 937, "else"
- line 303, "pan.___", state 940, "(1)"
- line 303, "pan.___", state 941, "(1)"
- line 303, "pan.___", state 941, "(1)"
- line 301, "pan.___", state 946, "((i<1))"
- line 301, "pan.___", state 946, "((i>=1))"
- line 308, "pan.___", state 953, "(1)"
- line 308, "pan.___", state 954, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 954, "else"
- line 308, "pan.___", state 957, "(1)"
- line 308, "pan.___", state 958, "(1)"
- line 308, "pan.___", state 958, "(1)"
- line 310, "pan.___", state 961, "(1)"
- line 310, "pan.___", state 961, "(1)"
- line 163, "pan.___", state 985, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 998, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 1008, "(1)"
- line 148, "pan.___", state 1016, "(1)"
- line 152, "pan.___", state 1028, "(1)"
- line 159, "pan.___", state 1039, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 1061, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 1071, "(1)"
- line 148, "pan.___", state 1079, "(1)"
- line 152, "pan.___", state 1091, "(1)"
- line 159, "pan.___", state 1106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 1115, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1128, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 1138, "(1)"
- line 148, "pan.___", state 1146, "(1)"
- line 152, "pan.___", state 1158, "(1)"
- line 511, "pan.___", state 1184, "-end-"
- (100 of 1184 states)
-unreached in proctype :init:
- line 518, "pan.___", state 9, "((j<2))"
- line 518, "pan.___", state 9, "((j>=2))"
- line 519, "pan.___", state 20, "((j<2))"
- line 519, "pan.___", state 20, "((j>=2))"
- line 524, "pan.___", state 33, "((j<2))"
- line 524, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 572, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 5.58 seconds
-pan: rate 38755.018 states/second
-pan: avg transition delay 1.7769e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2372
-2:3:2324
-3:3:2327
-4:3:2327
-5:3:2330
-6:3:2338
-7:3:2338
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-914:0:2372
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-929:1:69
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-966:2:2193
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-974:0:2372
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-986:2:2281
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+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-spin: line 296 replacement value: tmp
-spin: line 296 "pan.___", Error: formal par of wait_for_quiescent_state contains replacement value saw '-2'' near 'readerid'
-spin: 1 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define READER_PROGRESS
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
+++ /dev/null
-#define WRITER_PROGRESS
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-spin: line 297 replacement value: tmp
-spin: line 297 "pan.___", Error: formal par of wait_for_quiescent_state contains replacement value saw '-2'' near 'readerid'
-spin: 1 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--2:2:-2
--4:-4:-4
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-2:2:908
-3:0:2223
-4:1:0
-5:0:2223
-6:1:1
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-10:1:3
-11:0:2223
-12:2:909
-13:0:2223
-14:2:910
-15:2:914
-16:2:915
-17:2:922
-18:2:926
-19:2:927
-20:2:934
-21:2:938
-22:2:939
-23:2:946
-24:2:947
-25:2:957
-26:2:958
-27:2:968
-28:2:969
-29:0:2221
-30:2:981
-31:2:982
-32:0:2227
-33:2:986
-34:2:990
-35:2:991
-36:2:998
-37:2:1002
-38:2:1003
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-40:2:1011
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-45:2:1044
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-47:0:2227
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-51:0:2227
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-53:0:2227
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-55:0:2227
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-57:2:1074
-58:2:1080
-59:2:1081
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-62:2:1093
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-64:2:1105
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-290:0:2227
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+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 741)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10669, errors: 0
- 20146 states, stored
- 191615 states, matched
- 211761 transitions (= stored+matched)
- 712676 atomic steps
-hash conflicts: 1523 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.614 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.661 actual memory usage for states (unsuccessful compression: 102.92%)
- state-vector as stored = 58 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.326 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 401, "pan.___", state 330, "(1)"
- line 612, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 397, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 406, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 59, "(1)"
- line 416, "pan.___", state 89, "(1)"
- line 397, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 160, "(1)"
- line 650, "pan.___", state 213, "(1)"
- line 173, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, "pan.___", state 233, "(1)"
- line 158, "pan.___", state 254, "(1)"
- line 162, "pan.___", state 262, "(1)"
- line 166, "pan.___", state 274, "(1)"
- line 173, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 317, "(1)"
- line 162, "pan.___", state 325, "(1)"
- line 166, "pan.___", state 337, "(1)"
- line 173, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 384, "(1)"
- line 162, "pan.___", state 392, "(1)"
- line 166, "pan.___", state 404, "(1)"
- line 397, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 401, "pan.___", state 441, "(1)"
- line 406, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 470, "(1)"
- line 416, "pan.___", state 500, "(1)"
- line 397, "pan.___", state 526, "(1)"
- line 401, "pan.___", state 540, "(1)"
- line 406, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 599, "(1)"
- line 401, "pan.___", state 640, "(1)"
- line 406, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 699, "(1)"
- line 173, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 722, "(1)"
- line 177, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 731, "(1)"
- line 177, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 732, "else"
- line 175, "pan.___", state 737, "((j<1))"
- line 175, "pan.___", state 737, "((j>=1))"
- line 181, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 752, "(1)"
- line 162, "pan.___", state 760, "(1)"
- line 162, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 761, "else"
- line 160, "pan.___", state 766, "((j<1))"
- line 160, "pan.___", state 766, "((j>=1))"
- line 166, "pan.___", state 772, "(1)"
- line 166, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 773, "else"
- line 168, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 776, "else"
- line 173, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, "pan.___", state 785, "(1)"
- line 177, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, "pan.___", state 794, "(1)"
- line 177, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, "pan.___", state 795, "else"
- line 175, "pan.___", state 800, "((j<1))"
- line 175, "pan.___", state 800, "((j>=1))"
- line 181, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 815, "(1)"
- line 162, "pan.___", state 823, "(1)"
- line 162, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, "pan.___", state 824, "else"
- line 160, "pan.___", state 829, "((j<1))"
- line 160, "pan.___", state 829, "((j>=1))"
- line 166, "pan.___", state 835, "(1)"
- line 166, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, "pan.___", state 836, "else"
- line 168, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, "pan.___", state 839, "else"
- line 200, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, "pan.___", state 841, "else"
- line 212, "pan.___", state 845, "((i<1))"
- line 212, "pan.___", state 845, "((i>=1))"
- line 173, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 852, "(1)"
- line 177, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 861, "(1)"
- line 177, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 862, "else"
- line 175, "pan.___", state 867, "((j<1))"
- line 175, "pan.___", state 867, "((j>=1))"
- line 181, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 882, "(1)"
- line 162, "pan.___", state 890, "(1)"
- line 162, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 891, "else"
- line 160, "pan.___", state 896, "((j<1))"
- line 160, "pan.___", state 896, "((j>=1))"
- line 166, "pan.___", state 902, "(1)"
- line 166, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 903, "else"
- line 168, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 906, "else"
- line 200, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, "pan.___", state 908, "else"
- line 219, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, "pan.___", state 909, "else"
- line 354, "pan.___", state 915, "((sighand_exec==1))"
- line 354, "pan.___", state 915, "else"
- line 360, "pan.___", state 918, "sighand_exec = 1"
- line 397, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, "pan.___", state 933, "(1)"
- line 397, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, "pan.___", state 934, "else"
- line 397, "pan.___", state 937, "(1)"
- line 401, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, "pan.___", state 947, "(1)"
- line 401, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, "pan.___", state 948, "else"
- line 401, "pan.___", state 951, "(1)"
- line 401, "pan.___", state 952, "(1)"
- line 401, "pan.___", state 952, "(1)"
- line 399, "pan.___", state 957, "((i<1))"
- line 399, "pan.___", state 957, "((i>=1))"
- line 406, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 976, "(1)"
- line 407, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, "pan.___", state 977, "else"
- line 407, "pan.___", state 980, "(1)"
- line 407, "pan.___", state 981, "(1)"
- line 407, "pan.___", state 981, "(1)"
- line 411, "pan.___", state 989, "(1)"
- line 411, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, "pan.___", state 990, "else"
- line 411, "pan.___", state 993, "(1)"
- line 411, "pan.___", state 994, "(1)"
- line 411, "pan.___", state 994, "(1)"
- line 409, "pan.___", state 999, "((i<1))"
- line 409, "pan.___", state 999, "((i>=1))"
- line 416, "pan.___", state 1006, "(1)"
- line 416, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, "pan.___", state 1007, "else"
- line 416, "pan.___", state 1010, "(1)"
- line 416, "pan.___", state 1011, "(1)"
- line 416, "pan.___", state 1011, "(1)"
- line 418, "pan.___", state 1014, "(1)"
- line 418, "pan.___", state 1014, "(1)"
- line 360, "pan.___", state 1023, "sighand_exec = 1"
- line 401, "pan.___", state 1054, "(1)"
- line 406, "pan.___", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1113, "(1)"
- line 401, "pan.___", state 1151, "(1)"
- line 406, "pan.___", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1210, "(1)"
- line 397, "pan.___", state 1236, "(1)"
- line 401, "pan.___", state 1250, "(1)"
- line 406, "pan.___", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1309, "(1)"
- line 401, "pan.___", state 1350, "(1)"
- line 406, "pan.___", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1409, "(1)"
- line 173, "pan.___", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 1432, "(1)"
- line 177, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 1441, "(1)"
- line 177, "pan.___", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 1442, "else"
- line 175, "pan.___", state 1447, "((j<1))"
- line 175, "pan.___", state 1447, "((j>=1))"
- line 181, "pan.___", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1462, "(1)"
- line 162, "pan.___", state 1470, "(1)"
- line 162, "pan.___", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 1471, "else"
- line 160, "pan.___", state 1476, "((j<1))"
- line 160, "pan.___", state 1476, "((j>=1))"
- line 166, "pan.___", state 1482, "(1)"
- line 166, "pan.___", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 1483, "else"
- line 168, "pan.___", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 1486, "else"
- line 173, "pan.___", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, "pan.___", state 1495, "(1)"
- line 177, "pan.___", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, "pan.___", state 1504, "(1)"
- line 177, "pan.___", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, "pan.___", state 1505, "else"
- line 175, "pan.___", state 1510, "((j<1))"
- line 175, "pan.___", state 1510, "((j>=1))"
- line 181, "pan.___", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 1525, "(1)"
- line 162, "pan.___", state 1533, "(1)"
- line 162, "pan.___", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, "pan.___", state 1534, "else"
- line 160, "pan.___", state 1539, "((j<1))"
- line 160, "pan.___", state 1539, "((j>=1))"
- line 166, "pan.___", state 1545, "(1)"
- line 166, "pan.___", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, "pan.___", state 1546, "else"
- line 168, "pan.___", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, "pan.___", state 1549, "else"
- line 200, "pan.___", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, "pan.___", state 1551, "else"
- line 212, "pan.___", state 1555, "((i<1))"
- line 212, "pan.___", state 1555, "((i>=1))"
- line 173, "pan.___", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 1562, "(1)"
- line 177, "pan.___", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 1571, "(1)"
- line 177, "pan.___", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 1572, "else"
- line 175, "pan.___", state 1577, "((j<1))"
- line 175, "pan.___", state 1577, "((j>=1))"
- line 181, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1592, "(1)"
- line 162, "pan.___", state 1600, "(1)"
- line 162, "pan.___", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 1601, "else"
- line 160, "pan.___", state 1606, "((j<1))"
- line 160, "pan.___", state 1606, "((j>=1))"
- line 166, "pan.___", state 1612, "(1)"
- line 166, "pan.___", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 1613, "else"
- line 168, "pan.___", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 1616, "else"
- line 200, "pan.___", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, "pan.___", state 1618, "else"
- line 219, "pan.___", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, "pan.___", state 1619, "else"
- line 354, "pan.___", state 1625, "((sighand_exec==1))"
- line 354, "pan.___", state 1625, "else"
- line 360, "pan.___", state 1628, "sighand_exec = 1"
- line 397, "pan.___", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, "pan.___", state 1643, "(1)"
- line 397, "pan.___", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, "pan.___", state 1644, "else"
- line 397, "pan.___", state 1647, "(1)"
- line 401, "pan.___", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, "pan.___", state 1657, "(1)"
- line 401, "pan.___", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, "pan.___", state 1658, "else"
- line 401, "pan.___", state 1661, "(1)"
- line 401, "pan.___", state 1662, "(1)"
- line 401, "pan.___", state 1662, "(1)"
- line 399, "pan.___", state 1667, "((i<1))"
- line 399, "pan.___", state 1667, "((i>=1))"
- line 406, "pan.___", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 1686, "(1)"
- line 407, "pan.___", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, "pan.___", state 1687, "else"
- line 407, "pan.___", state 1690, "(1)"
- line 407, "pan.___", state 1691, "(1)"
- line 407, "pan.___", state 1691, "(1)"
- line 411, "pan.___", state 1699, "(1)"
- line 411, "pan.___", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, "pan.___", state 1700, "else"
- line 411, "pan.___", state 1703, "(1)"
- line 411, "pan.___", state 1704, "(1)"
- line 411, "pan.___", state 1704, "(1)"
- line 409, "pan.___", state 1709, "((i<1))"
- line 409, "pan.___", state 1709, "((i>=1))"
- line 416, "pan.___", state 1716, "(1)"
- line 416, "pan.___", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, "pan.___", state 1717, "else"
- line 416, "pan.___", state 1720, "(1)"
- line 416, "pan.___", state 1721, "(1)"
- line 416, "pan.___", state 1721, "(1)"
- line 418, "pan.___", state 1724, "(1)"
- line 418, "pan.___", state 1724, "(1)"
- line 360, "pan.___", state 1733, "sighand_exec = 1"
- line 177, "pan.___", state 1758, "(1)"
- line 181, "pan.___", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1779, "(1)"
- line 162, "pan.___", state 1787, "(1)"
- line 166, "pan.___", state 1799, "(1)"
- line 173, "pan.___", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, "pan.___", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, "pan.___", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 1842, "(1)"
- line 162, "pan.___", state 1850, "(1)"
- line 166, "pan.___", state 1862, "(1)"
- line 173, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, "pan.___", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, "pan.___", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1909, "(1)"
- line 162, "pan.___", state 1917, "(1)"
- line 166, "pan.___", state 1929, "(1)"
- line 700, "pan.___", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 746, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.15 seconds
-pan: rate 134306.67 states/second
-pan: avg transition delay 7.0835e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_nested.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 715)
-Depth= 22961 States= 1e+06 Transitions= 8.79e+06 Memory= 535.002 t= 17.2 R= 6e+04
-Depth= 22961 States= 2e+06 Transitions= 1.79e+07 Memory= 603.654 t= 34.7 R= 6e+04
-Depth= 25030 States= 3e+06 Transitions= 2.69e+07 Memory= 672.404 t= 52.6 R= 6e+04
-pan: resizing hashtable to -w22.. done
-Depth= 25030 States= 4e+06 Transitions= 3.73e+07 Memory= 772.080 t= 74.4 R= 5e+04
-Depth= 25030 States= 5e+06 Transitions= 4.77e+07 Memory= 840.830 t= 96.2 R= 5e+04
-Depth= 25030 States= 6e+06 Transitions= 5.45e+07 Memory= 909.483 t= 110 R= 5e+04
-Depth= 25030 States= 7e+06 Transitions= 6.05e+07 Memory= 978.135 t= 122 R= 6e+04
-Depth= 25030 States= 8e+06 Transitions= 6.68e+07 Memory= 1046.787 t= 135 R= 6e+04
-Depth= 25030 States= 9e+06 Transitions= 7.29e+07 Memory= 1115.537 t= 148 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 25030 States= 1e+07 Transitions= 7.91e+07 Memory= 1308.283 t= 162 R= 6e+04
-Depth= 25030 States= 1.1e+07 Transitions= 8.5e+07 Memory= 1376.936 t= 174 R= 6e+04
-Depth= 25030 States= 1.2e+07 Transitions= 9.12e+07 Memory= 1445.588 t= 186 R= 6e+04
-Depth= 25030 States= 1.3e+07 Transitions= 9.79e+07 Memory= 1514.240 t= 200 R= 7e+04
-Depth= 25030 States= 1.4e+07 Transitions= 1.09e+08 Memory= 1582.990 t= 222 R= 6e+04
-Depth= 25030 States= 1.5e+07 Transitions= 1.18e+08 Memory= 1651.643 t= 240 R= 6e+04
-Depth= 25030 States= 1.6e+07 Transitions= 1.27e+08 Memory= 1720.295 t= 258 R= 6e+04
-Depth= 25030 States= 1.7e+07 Transitions= 1.36e+08 Memory= 1788.947 t= 276 R= 6e+04
-Depth= 25030 States= 1.8e+07 Transitions= 1.44e+08 Memory= 1857.697 t= 292 R= 6e+04
-Depth= 25030 States= 1.9e+07 Transitions= 1.54e+08 Memory= 1926.350 t= 313 R= 6e+04
-Depth= 25030 States= 2e+07 Transitions= 1.64e+08 Memory= 1995.002 t= 333 R= 6e+04
-Depth= 25104 States= 2.1e+07 Transitions= 1.73e+08 Memory= 2063.654 t= 350 R= 6e+04
-Depth= 25104 States= 2.2e+07 Transitions= 1.83e+08 Memory= 2132.404 t= 370 R= 6e+04
-Depth= 25104 States= 2.3e+07 Transitions= 1.89e+08 Memory= 2201.057 t= 384 R= 6e+04
-Depth= 25152 States= 2.4e+07 Transitions= 1.98e+08 Memory= 2269.709 t= 402 R= 6e+04
-Depth= 25152 States= 2.5e+07 Transitions= 2.08e+08 Memory= 2338.361 t= 421 R= 6e+04
-Depth= 25152 States= 2.6e+07 Transitions= 2.15e+08 Memory= 2407.111 t= 436 R= 6e+04
-Depth= 25152 States= 2.7e+07 Transitions= 2.24e+08 Memory= 2475.764 t= 454 R= 6e+04
-Depth= 25152 States= 2.8e+07 Transitions= 2.33e+08 Memory= 2544.416 t= 471 R= 6e+04
-Depth= 25152 States= 2.9e+07 Transitions= 2.42e+08 Memory= 2613.068 t= 490 R= 6e+04
-Depth= 32255 States= 3e+07 Transitions= 2.5e+08 Memory= 2681.818 t= 506 R= 6e+04
-Depth= 33413 States= 3.1e+07 Transitions= 2.61e+08 Memory= 2750.471 t= 530 R= 6e+04
-Depth= 33413 States= 3.2e+07 Transitions= 2.73e+08 Memory= 2819.123 t= 555 R= 6e+04
-Depth= 33413 States= 3.3e+07 Transitions= 2.83e+08 Memory= 2887.873 t= 576 R= 6e+04
-Depth= 33413 States= 3.4e+07 Transitions= 2.94e+08 Memory= 2956.526 t= 598 R= 6e+04
-pan: resizing hashtable to -w26.. done
-Depth= 33413 States= 3.5e+07 Transitions= 3.03e+08 Memory= 3521.260 t= 624 R= 6e+04
-Depth= 33413 States= 3.6e+07 Transitions= 3.15e+08 Memory= 3589.912 t= 648 R= 6e+04
-Depth= 33413 States= 3.7e+07 Transitions= 3.25e+08 Memory= 3658.565 t= 667 R= 6e+04
-Depth= 33413 States= 3.8e+07 Transitions= 3.34e+08 Memory= 3727.315 t= 687 R= 6e+04
-Depth= 33413 States= 3.9e+07 Transitions= 3.4e+08 Memory= 3795.967 t= 699 R= 6e+04
-Depth= 33413 States= 4e+07 Transitions= 3.48e+08 Memory= 3864.619 t= 715 R= 6e+04
-Depth= 33413 States= 4.1e+07 Transitions= 3.58e+08 Memory= 3933.272 t= 735 R= 6e+04
-Depth= 33413 States= 4.2e+07 Transitions= 3.64e+08 Memory= 4002.022 t= 747 R= 6e+04
-Depth= 33413 States= 4.3e+07 Transitions= 3.72e+08 Memory= 4070.674 t= 762 R= 6e+04
-Depth= 33413 States= 4.4e+07 Transitions= 3.82e+08 Memory= 4139.326 t= 783 R= 6e+04
-Depth= 33413 States= 4.5e+07 Transitions= 3.89e+08 Memory= 4207.979 t= 799 R= 6e+04
-Depth= 33413 States= 4.6e+07 Transitions= 3.95e+08 Memory= 4276.631 t= 810 R= 6e+04
-Depth= 33413 States= 4.7e+07 Transitions= 4.01e+08 Memory= 4345.381 t= 823 R= 6e+04
-Depth= 33413 States= 4.8e+07 Transitions= 4.07e+08 Memory= 4414.033 t= 835 R= 6e+04
-Depth= 33413 States= 4.9e+07 Transitions= 4.16e+08 Memory= 4482.686 t= 852 R= 6e+04
-Depth= 33413 States= 5e+07 Transitions= 4.25e+08 Memory= 4551.338 t= 871 R= 6e+04
-Depth= 33413 States= 5.1e+07 Transitions= 4.31e+08 Memory= 4620.088 t= 883 R= 6e+04
-Depth= 33413 States= 5.2e+07 Transitions= 4.37e+08 Memory= 4688.740 t= 896 R= 6e+04
-Depth= 33413 States= 5.3e+07 Transitions= 4.43e+08 Memory= 4757.393 t= 907 R= 6e+04
-Depth= 33413 States= 5.4e+07 Transitions= 4.5e+08 Memory= 4826.045 t= 922 R= 6e+04
-Depth= 33413 States= 5.5e+07 Transitions= 4.62e+08 Memory= 4894.795 t= 947 R= 6e+04
-Depth= 33413 States= 5.6e+07 Transitions= 4.71e+08 Memory= 4963.447 t= 966 R= 6e+04
-Depth= 33413 States= 5.7e+07 Transitions= 4.81e+08 Memory= 5032.100 t= 987 R= 6e+04
-Depth= 33413 States= 5.8e+07 Transitions= 4.92e+08 Memory= 5100.752 t= 1.01e+03 R= 6e+04
-Depth= 33413 States= 5.9e+07 Transitions= 5.05e+08 Memory= 5169.502 t= 1.03e+03 R= 6e+04
-Depth= 33413 States= 6e+07 Transitions= 5.18e+08 Memory= 5238.154 t= 1.06e+03 R= 6e+04
-Depth= 33413 States= 6.1e+07 Transitions= 5.27e+08 Memory= 5306.807 t= 1.08e+03 R= 6e+04
-Depth= 33413 States= 6.2e+07 Transitions= 5.37e+08 Memory= 5375.459 t= 1.1e+03 R= 6e+04
-Depth= 33413 States= 6.3e+07 Transitions= 5.47e+08 Memory= 5444.111 t= 1.12e+03 R= 6e+04
-Depth= 33413 States= 6.4e+07 Transitions= 5.54e+08 Memory= 5512.861 t= 1.13e+03 R= 6e+04
-Depth= 33413 States= 6.5e+07 Transitions= 5.6e+08 Memory= 5581.514 t= 1.14e+03 R= 6e+04
-Depth= 33413 States= 6.6e+07 Transitions= 5.66e+08 Memory= 5650.166 t= 1.16e+03 R= 6e+04
-Depth= 33413 States= 6.7e+07 Transitions= 5.73e+08 Memory= 5718.818 t= 1.17e+03 R= 6e+04
-Depth= 33413 States= 6.8e+07 Transitions= 5.82e+08 Memory= 5787.568 t= 1.19e+03 R= 6e+04
-Depth= 33413 States= 6.9e+07 Transitions= 5.9e+08 Memory= 5856.221 t= 1.21e+03 R= 6e+04
-Depth= 33413 States= 7e+07 Transitions= 5.99e+08 Memory= 5924.873 t= 1.22e+03 R= 6e+04
-Depth= 33413 States= 7.1e+07 Transitions= 6.08e+08 Memory= 5993.526 t= 1.24e+03 R= 6e+04
-Depth= 33413 States= 7.2e+07 Transitions= 6.18e+08 Memory= 6062.276 t= 1.26e+03 R= 6e+04
-Depth= 33413 States= 7.3e+07 Transitions= 6.27e+08 Memory= 6130.928 t= 1.28e+03 R= 6e+04
-Depth= 33413 States= 7.4e+07 Transitions= 6.33e+08 Memory= 6199.580 t= 1.29e+03 R= 6e+04
-Depth= 33413 States= 7.5e+07 Transitions= 6.39e+08 Memory= 6268.233 t= 1.31e+03 R= 6e+04
-Depth= 33413 States= 7.6e+07 Transitions= 6.45e+08 Memory= 6336.983 t= 1.32e+03 R= 6e+04
-Depth= 33413 States= 7.7e+07 Transitions= 6.55e+08 Memory= 6405.635 t= 1.34e+03 R= 6e+04
-Depth= 33413 States= 7.8e+07 Transitions= 6.61e+08 Memory= 6474.287 t= 1.35e+03 R= 6e+04
-Depth= 33413 States= 7.9e+07 Transitions= 6.71e+08 Memory= 6542.940 t= 1.37e+03 R= 6e+04
-Depth= 33413 States= 8e+07 Transitions= 6.77e+08 Memory= 6611.592 t= 1.38e+03 R= 6e+04
-Depth= 33413 States= 8.1e+07 Transitions= 6.83e+08 Memory= 6680.342 t= 1.4e+03 R= 6e+04
-Depth= 33413 States= 8.2e+07 Transitions= 6.91e+08 Memory= 6748.994 t= 1.41e+03 R= 6e+04
-Depth= 33413 States= 8.3e+07 Transitions= 6.97e+08 Memory= 6817.647 t= 1.43e+03 R= 6e+04
-Depth= 33413 States= 8.4e+07 Transitions= 7.06e+08 Memory= 6886.299 t= 1.44e+03 R= 6e+04
-Depth= 33413 States= 8.5e+07 Transitions= 7.15e+08 Memory= 6955.049 t= 1.46e+03 R= 6e+04
-Depth= 33413 States= 8.6e+07 Transitions= 7.24e+08 Memory= 7023.701 t= 1.48e+03 R= 6e+04
-Depth= 33413 States= 8.7e+07 Transitions= 7.35e+08 Memory= 7092.354 t= 1.5e+03 R= 6e+04
-Depth= 33413 States= 8.8e+07 Transitions= 7.46e+08 Memory= 7161.006 t= 1.52e+03 R= 6e+04
-Depth= 33413 States= 8.9e+07 Transitions= 7.61e+08 Memory= 7229.756 t= 1.56e+03 R= 6e+04
-Depth= 33413 States= 9e+07 Transitions= 7.83e+08 Memory= 7298.408 t= 1.6e+03 R= 6e+04
-Depth= 33413 States= 9.1e+07 Transitions= 7.97e+08 Memory= 7367.061 t= 1.63e+03 R= 6e+04
-Depth= 33413 States= 9.2e+07 Transitions= 8.12e+08 Memory= 7435.713 t= 1.66e+03 R= 6e+04
-Depth= 33413 States= 9.3e+07 Transitions= 8.24e+08 Memory= 7504.463 t= 1.68e+03 R= 6e+04
-Depth= 33413 States= 9.4e+07 Transitions= 8.32e+08 Memory= 7573.115 t= 1.7e+03 R= 6e+04
-Depth= 33413 States= 9.5e+07 Transitions= 8.46e+08 Memory= 7641.768 t= 1.73e+03 R= 5e+04
-Depth= 33413 States= 9.6e+07 Transitions= 8.57e+08 Memory= 7710.420 t= 1.75e+03 R= 5e+04
-Depth= 33413 States= 9.7e+07 Transitions= 8.71e+08 Memory= 7779.072 t= 1.78e+03 R= 5e+04
-Depth= 33413 States= 9.8e+07 Transitions= 8.84e+08 Memory= 7847.822 t= 1.81e+03 R= 5e+04
-Depth= 33413 States= 9.9e+07 Transitions= 8.97e+08 Memory= 7916.475 t= 1.83e+03 R= 5e+04
-Depth= 33413 States= 1e+08 Transitions= 9.08e+08 Memory= 7985.127 t= 1.85e+03 R= 5e+04
-Depth= 33413 States= 1.01e+08 Transitions= 9.22e+08 Memory= 8053.779 t= 1.88e+03 R= 5e+04
-Depth= 33413 States= 1.02e+08 Transitions= 9.35e+08 Memory= 8122.529 t= 1.91e+03 R= 5e+04
-Depth= 33413 States= 1.03e+08 Transitions= 9.47e+08 Memory= 8191.182 t= 1.93e+03 R= 5e+04
-Depth= 33413 States= 1.04e+08 Transitions= 9.59e+08 Memory= 8259.834 t= 1.96e+03 R= 5e+04
-Depth= 33413 States= 1.05e+08 Transitions= 9.68e+08 Memory= 8328.486 t= 1.97e+03 R= 5e+04
-Depth= 33413 States= 1.06e+08 Transitions= 9.78e+08 Memory= 8397.236 t= 2e+03 R= 5e+04
-Depth= 33413 States= 1.07e+08 Transitions= 9.97e+08 Memory= 8465.889 t= 2.04e+03 R= 5e+04
-Depth= 33413 States= 1.08e+08 Transitions= 1.01e+09 Memory= 8534.541 t= 2.06e+03 R= 5e+04
-Depth= 33413 States= 1.09e+08 Transitions= 1.02e+09 Memory= 8603.193 t= 2.09e+03 R= 5e+04
-Depth= 33413 States= 1.1e+08 Transitions= 1.03e+09 Memory= 8671.846 t= 2.1e+03 R= 5e+04
-Depth= 33413 States= 1.11e+08 Transitions= 1.05e+09 Memory= 8740.596 t= 2.13e+03 R= 5e+04
-Depth= 33413 States= 1.12e+08 Transitions= 1.06e+09 Memory= 8809.248 t= 2.17e+03 R= 5e+04
-Depth= 33413 States= 1.13e+08 Transitions= 1.08e+09 Memory= 8877.901 t= 2.19e+03 R= 5e+04
-Depth= 33413 States= 1.14e+08 Transitions= 1.09e+09 Memory= 8946.553 t= 2.22e+03 R= 5e+04
-Depth= 33413 States= 1.15e+08 Transitions= 1.1e+09 Memory= 9015.303 t= 2.24e+03 R= 5e+04
-Depth= 33413 States= 1.16e+08 Transitions= 1.11e+09 Memory= 9083.955 t= 2.26e+03 R= 5e+04
-Depth= 33413 States= 1.17e+08 Transitions= 1.11e+09 Memory= 9152.608 t= 2.27e+03 R= 5e+04
-Depth= 33413 States= 1.18e+08 Transitions= 1.12e+09 Memory= 9221.260 t= 2.29e+03 R= 5e+04
-Depth= 33413 States= 1.19e+08 Transitions= 1.13e+09 Memory= 9290.010 t= 2.3e+03 R= 5e+04
-Depth= 33413 States= 1.2e+08 Transitions= 1.14e+09 Memory= 9358.662 t= 2.32e+03 R= 5e+04
-Depth= 33413 States= 1.21e+08 Transitions= 1.15e+09 Memory= 9427.315 t= 2.34e+03 R= 5e+04
-Depth= 33413 States= 1.22e+08 Transitions= 1.17e+09 Memory= 9495.967 t= 2.38e+03 R= 5e+04
-Depth= 33413 States= 1.23e+08 Transitions= 1.18e+09 Memory= 9564.717 t= 2.41e+03 R= 5e+04
-Depth= 33413 States= 1.24e+08 Transitions= 1.19e+09 Memory= 9633.369 t= 2.43e+03 R= 5e+04
-Depth= 33413 States= 1.25e+08 Transitions= 1.2e+09 Memory= 9702.022 t= 2.46e+03 R= 5e+04
-Depth= 33413 States= 1.26e+08 Transitions= 1.22e+09 Memory= 9770.674 t= 2.48e+03 R= 5e+04
-Depth= 33413 States= 1.27e+08 Transitions= 1.23e+09 Memory= 9839.326 t= 2.51e+03 R= 5e+04
-Depth= 33413 States= 1.28e+08 Transitions= 1.24e+09 Memory= 9908.076 t= 2.54e+03 R= 5e+04
-Depth= 33413 States= 1.29e+08 Transitions= 1.25e+09 Memory= 9976.729 t= 2.56e+03 R= 5e+04
-Depth= 33413 States= 1.3e+08 Transitions= 1.26e+09 Memory= 10045.381 t= 2.58e+03 R= 5e+04
-Depth= 33413 States= 1.31e+08 Transitions= 1.27e+09 Memory= 10114.033 t= 2.61e+03 R= 5e+04
-Depth= 33413 States= 1.32e+08 Transitions= 1.28e+09 Memory= 10182.783 t= 2.62e+03 R= 5e+04
-Depth= 33413 States= 1.33e+08 Transitions= 1.29e+09 Memory= 10251.436 t= 2.64e+03 R= 5e+04
-Depth= 33413 States= 1.34e+08 Transitions= 1.3e+09 Memory= 10320.088 t= 2.66e+03 R= 5e+04
-Depth= 33413 States= 1.35e+08 Transitions= 1.31e+09 Memory= 10388.740 t= 2.68e+03 R= 5e+04
-pan: resizing hashtable to -w28.. done
-Depth= 33413 States= 1.36e+08 Transitions= 1.32e+09 Memory= 12441.428 t= 2.73e+03 R= 5e+04
-Depth= 33413 States= 1.37e+08 Transitions= 1.32e+09 Memory= 12510.178 t= 2.75e+03 R= 5e+04
-Depth= 33413 States= 1.38e+08 Transitions= 1.33e+09 Memory= 12578.830 t= 2.77e+03 R= 5e+04
-Depth= 33413 States= 1.39e+08 Transitions= 1.35e+09 Memory= 12647.483 t= 2.79e+03 R= 5e+04
-Depth= 33413 States= 1.4e+08 Transitions= 1.36e+09 Memory= 12716.135 t= 2.82e+03 R= 5e+04
-Depth= 33413 States= 1.41e+08 Transitions= 1.37e+09 Memory= 12784.787 t= 2.84e+03 R= 5e+04
-Depth= 33413 States= 1.42e+08 Transitions= 1.38e+09 Memory= 12853.537 t= 2.86e+03 R= 5e+04
-Depth= 33413 States= 1.43e+08 Transitions= 1.4e+09 Memory= 12922.190 t= 2.9e+03 R= 5e+04
-Depth= 33413 States= 1.44e+08 Transitions= 1.41e+09 Memory= 12990.842 t= 2.91e+03 R= 5e+04
-Depth= 33413 States= 1.45e+08 Transitions= 1.42e+09 Memory= 13059.494 t= 2.93e+03 R= 5e+04
-Depth= 33413 States= 1.46e+08 Transitions= 1.43e+09 Memory= 13128.244 t= 2.96e+03 R= 5e+04
-Depth= 33413 States= 1.47e+08 Transitions= 1.45e+09 Memory= 13196.897 t= 3e+03 R= 5e+04
-Depth= 33413 States= 1.48e+08 Transitions= 1.47e+09 Memory= 13265.549 t= 3.03e+03 R= 5e+04
-Depth= 33413 States= 1.49e+08 Transitions= 1.48e+09 Memory= 13334.201 t= 3.06e+03 R= 5e+04
-Depth= 33413 States= 1.5e+08 Transitions= 1.5e+09 Memory= 13402.951 t= 3.09e+03 R= 5e+04
-Depth= 33413 States= 1.51e+08 Transitions= 1.5e+09 Memory= 13471.604 t= 3.11e+03 R= 5e+04
-Depth= 33413 States= 1.52e+08 Transitions= 1.52e+09 Memory= 13540.256 t= 3.13e+03 R= 5e+04
-Depth= 33413 States= 1.53e+08 Transitions= 1.53e+09 Memory= 13608.908 t= 3.15e+03 R= 5e+04
-Depth= 33413 States= 1.54e+08 Transitions= 1.55e+09 Memory= 13677.658 t= 3.19e+03 R= 5e+04
-Depth= 33413 States= 1.55e+08 Transitions= 1.56e+09 Memory= 13746.311 t= 3.22e+03 R= 5e+04
-Depth= 33413 States= 1.56e+08 Transitions= 1.58e+09 Memory= 13814.963 t= 3.25e+03 R= 5e+04
-Depth= 33413 States= 1.57e+08 Transitions= 1.59e+09 Memory= 13883.615 t= 3.29e+03 R= 5e+04
-Depth= 33413 States= 1.58e+08 Transitions= 1.6e+09 Memory= 13952.268 t= 3.31e+03 R= 5e+04
-Depth= 33413 States= 1.59e+08 Transitions= 1.61e+09 Memory= 14021.018 t= 3.33e+03 R= 5e+04
-Depth= 33413 States= 1.6e+08 Transitions= 1.63e+09 Memory= 14089.670 t= 3.36e+03 R= 5e+04
-Depth= 33413 States= 1.61e+08 Transitions= 1.64e+09 Memory= 14158.322 t= 3.39e+03 R= 5e+04
-Depth= 33413 States= 1.62e+08 Transitions= 1.66e+09 Memory= 14226.975 t= 3.42e+03 R= 5e+04
-Depth= 33413 States= 1.63e+08 Transitions= 1.67e+09 Memory= 14295.725 t= 3.45e+03 R= 5e+04
-Depth= 33413 States= 1.64e+08 Transitions= 1.69e+09 Memory= 14364.377 t= 3.48e+03 R= 5e+04
-Depth= 33413 States= 1.65e+08 Transitions= 1.7e+09 Memory= 14433.029 t= 3.5e+03 R= 5e+04
-Depth= 33413 States= 1.66e+08 Transitions= 1.71e+09 Memory= 14501.682 t= 3.52e+03 R= 5e+04
-Depth= 33413 States= 1.67e+08 Transitions= 1.72e+09 Memory= 14570.432 t= 3.55e+03 R= 5e+04
-Depth= 33413 States= 1.68e+08 Transitions= 1.73e+09 Memory= 14639.084 t= 3.57e+03 R= 5e+04
-Depth= 33413 States= 1.69e+08 Transitions= 1.74e+09 Memory= 14707.736 t= 3.59e+03 R= 5e+04
-Depth= 33413 States= 1.7e+08 Transitions= 1.76e+09 Memory= 14776.389 t= 3.62e+03 R= 5e+04
-Depth= 33413 States= 1.71e+08 Transitions= 1.77e+09 Memory= 14845.041 t= 3.64e+03 R= 5e+04
-Depth= 33413 States= 1.72e+08 Transitions= 1.77e+09 Memory= 14913.791 t= 3.65e+03 R= 5e+04
-Depth= 33413 States= 1.73e+08 Transitions= 1.78e+09 Memory= 14982.443 t= 3.66e+03 R= 5e+04
-Depth= 33413 States= 1.74e+08 Transitions= 1.79e+09 Memory= 15051.096 t= 3.68e+03 R= 5e+04
-Depth= 33413 States= 1.75e+08 Transitions= 1.79e+09 Memory= 15119.748 t= 3.69e+03 R= 5e+04
-Depth= 33413 States= 1.76e+08 Transitions= 1.8e+09 Memory= 15188.498 t= 3.71e+03 R= 5e+04
-Depth= 33413 States= 1.77e+08 Transitions= 1.8e+09 Memory= 15257.151 t= 3.72e+03 R= 5e+04
-Depth= 33413 States= 1.78e+08 Transitions= 1.81e+09 Memory= 15325.803 t= 3.73e+03 R= 5e+04
-Depth= 33413 States= 1.79e+08 Transitions= 1.82e+09 Memory= 15394.455 t= 3.75e+03 R= 5e+04
-Depth= 33413 States= 1.8e+08 Transitions= 1.83e+09 Memory= 15463.205 t= 3.76e+03 R= 5e+04
-Depth= 33413 States= 1.81e+08 Transitions= 1.83e+09 Memory= 15531.858 t= 3.77e+03 R= 5e+04
-Depth= 33413 States= 1.82e+08 Transitions= 1.84e+09 Memory= 15600.510 t= 3.79e+03 R= 5e+04
-Depth= 33413 States= 1.83e+08 Transitions= 1.85e+09 Memory= 15669.162 t= 3.8e+03 R= 5e+04
-Depth= 33413 States= 1.84e+08 Transitions= 1.86e+09 Memory= 15737.912 t= 3.82e+03 R= 5e+04
-Depth= 33413 States= 1.85e+08 Transitions= 1.87e+09 Memory= 15806.565 t= 3.84e+03 R= 5e+04
-Depth= 33413 States= 1.86e+08 Transitions= 1.88e+09 Memory= 15875.217 t= 3.87e+03 R= 5e+04
-Depth= 33413 States= 1.87e+08 Transitions= 1.89e+09 Memory= 15943.869 t= 3.89e+03 R= 5e+04
-Depth= 33413 States= 1.88e+08 Transitions= 1.9e+09 Memory= 16012.522 t= 3.91e+03 R= 5e+04
-Depth= 33413 States= 1.89e+08 Transitions= 1.91e+09 Memory= 16081.272 t= 3.94e+03 R= 5e+04
-Depth= 33413 States= 1.9e+08 Transitions= 1.92e+09 Memory= 16149.924 t= 3.96e+03 R= 5e+04
-Depth= 33413 States= 1.91e+08 Transitions= 1.94e+09 Memory= 16218.576 t= 3.98e+03 R= 5e+04
-Depth= 33413 States= 1.92e+08 Transitions= 1.95e+09 Memory= 16287.229 t= 4.02e+03 R= 5e+04
-Depth= 33413 States= 1.93e+08 Transitions= 1.96e+09 Memory= 16355.979 t= 4.05e+03 R= 5e+04
-Depth= 33413 States= 1.94e+08 Transitions= 1.97e+09 Memory= 16424.631 t= 4.09e+03 R= 5e+04
-Depth= 33413 States= 1.95e+08 Transitions= 1.99e+09 Memory= 16493.283 t= 4.17e+03 R= 5e+04
-Depth= 33413 States= 1.96e+08 Transitions= 2e+09 Memory= 16561.936 t= 4.26e+03 R= 5e+04
-Depth= 33413 States= 1.97e+08 Transitions= 2.02e+09 Memory= 16630.686 t= 4.36e+03 R= 5e+04
-Depth= 33413 States= 1.98e+08 Transitions= 2.04e+09 Memory= 16699.338 t= 4.45e+03 R= 4e+04
-Depth= 33413 States= 1.99e+08 Transitions= 2.05e+09 Memory= 16767.990 t= 4.53e+03 R= 4e+04
-Depth= 33413 States= 2e+08 Transitions= 2.06e+09 Memory= 16836.643 t= 4.59e+03 R= 4e+04
-Depth= 33413 States= 2.01e+08 Transitions= 2.07e+09 Memory= 16905.393 t= 4.64e+03 R= 4e+04
-Depth= 33413 States= 2.02e+08 Transitions= 2.07e+09 Memory= 16974.045 t= 4.7e+03 R= 4e+04
-Depth= 33413 States= 2.03e+08 Transitions= 2.08e+09 Memory= 17042.697 t= 4.78e+03 R= 4e+04
-Depth= 33413 States= 2.04e+08 Transitions= 2.1e+09 Memory= 17111.350 t= 4.9e+03 R= 4e+04
-Depth= 33413 States= 2.05e+08 Transitions= 2.11e+09 Memory= 17180.002 t= 5.05e+03 R= 4e+04
-Depth= 33413 States= 2.06e+08 Transitions= 2.13e+09 Memory= 17248.752 t= 5.25e+03 R= 4e+04
-Depth= 33413 States= 2.07e+08 Transitions= 2.14e+09 Memory= 17317.404 t= 5.45e+03 R= 4e+04
-Depth= 33413 States= 2.08e+08 Transitions= 2.15e+09 Memory= 17386.057 t= 5.65e+03 R= 4e+04
-Depth= 33413 States= 2.09e+08 Transitions= 2.16e+09 Memory= 17454.709 t= 5.86e+03 R= 4e+04
-Depth= 33413 States= 2.1e+08 Transitions= 2.17e+09 Memory= 17523.459 t= 6.1e+03 R= 3e+04
+++ /dev/null
-#define READER_NEST_LEVEL 1
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-#define get_pid() ((_pid < 1) -> 0 : 1)
-#elif defined(TEST_SIGNAL_ON_READ)
-#define get_pid() ((_pid < 2) -> 0 : 1)
-#else
-#define get_pid() (_pid)
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- dispatch_sighand_read_exec();
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-11143:2:1812
-11144:2:1813
-11145:2:1811
-11146:2:1812
-11147:2:1813
-11148:2:1824
-11149:2:1829
-11150:2:1830
-11151:0:4365
-11152:2:1842
-11153:0:4365
-11154:3:2427
-11155:0:4365
-11156:2:1844
-11157:0:4363
-11158:3:2428
-11159:0:4369
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 72 byte, depth reached 10856, errors: 0
- 161519 states, stored
- 1724866 states, matched
- 1886385 transitions (= stored+matched)
- 6692565 atomic steps
-hash conflicts: 84009 (resolved)
-
-Stats on memory usage (in Megabytes):
- 15.404 equivalent memory usage for states (stored*(State-vector + overhead))
- 10.421 actual memory usage for states (compression: 67.65%)
- state-vector as stored = 40 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 476.115 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 403, "pan.___", state 330, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 652, "pan.___", state 213, "(1)"
- line 403, "pan.___", state 239, "(1)"
- line 403, "pan.___", state 525, "(1)"
- line 399, "pan.___", state 610, "(1)"
- line 403, "pan.___", state 624, "(1)"
- line 403, "pan.___", state 724, "(1)"
- line 399, "pan.___", state 805, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 807, "(1)"
- line 399, "pan.___", state 808, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 808, "else"
- line 399, "pan.___", state 811, "(1)"
- line 403, "pan.___", state 819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 821, "(1)"
- line 403, "pan.___", state 822, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 822, "else"
- line 403, "pan.___", state 825, "(1)"
- line 403, "pan.___", state 826, "(1)"
- line 403, "pan.___", state 826, "(1)"
- line 401, "pan.___", state 831, "((j<1))"
- line 401, "pan.___", state 831, "((j>=1))"
- line 408, "pan.___", state 837, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 850, "(1)"
- line 409, "pan.___", state 851, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 851, "else"
- line 409, "pan.___", state 854, "(1)"
- line 409, "pan.___", state 855, "(1)"
- line 409, "pan.___", state 855, "(1)"
- line 413, "pan.___", state 863, "(1)"
- line 413, "pan.___", state 864, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 864, "else"
- line 413, "pan.___", state 867, "(1)"
- line 413, "pan.___", state 868, "(1)"
- line 413, "pan.___", state 868, "(1)"
- line 411, "pan.___", state 873, "((j<1))"
- line 411, "pan.___", state 873, "((j>=1))"
- line 418, "pan.___", state 880, "(1)"
- line 418, "pan.___", state 881, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 881, "else"
- line 418, "pan.___", state 884, "(1)"
- line 418, "pan.___", state 885, "(1)"
- line 418, "pan.___", state 885, "(1)"
- line 399, "pan.___", state 896, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 898, "(1)"
- line 399, "pan.___", state 899, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 899, "else"
- line 399, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 910, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 912, "(1)"
- line 403, "pan.___", state 913, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 913, "else"
- line 403, "pan.___", state 916, "(1)"
- line 403, "pan.___", state 917, "(1)"
- line 403, "pan.___", state 917, "(1)"
- line 401, "pan.___", state 922, "((j<1))"
- line 401, "pan.___", state 922, "((j>=1))"
- line 408, "pan.___", state 928, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 941, "(1)"
- line 409, "pan.___", state 942, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 942, "else"
- line 409, "pan.___", state 945, "(1)"
- line 409, "pan.___", state 946, "(1)"
- line 409, "pan.___", state 946, "(1)"
- line 413, "pan.___", state 954, "(1)"
- line 413, "pan.___", state 955, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 955, "else"
- line 413, "pan.___", state 958, "(1)"
- line 413, "pan.___", state 959, "(1)"
- line 413, "pan.___", state 959, "(1)"
- line 411, "pan.___", state 964, "((j<1))"
- line 411, "pan.___", state 964, "((j>=1))"
- line 418, "pan.___", state 971, "(1)"
- line 418, "pan.___", state 972, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 972, "else"
- line 418, "pan.___", state 975, "(1)"
- line 418, "pan.___", state 976, "(1)"
- line 418, "pan.___", state 976, "(1)"
- line 194, "pan.___", state 981, "(1)"
- line 194, "pan.___", state 981, "(1)"
- line 214, "pan.___", state 985, "((i<1))"
- line 214, "pan.___", state 985, "((i>=1))"
- line 399, "pan.___", state 991, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 993, "(1)"
- line 399, "pan.___", state 994, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 994, "else"
- line 399, "pan.___", state 997, "(1)"
- line 403, "pan.___", state 1005, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1007, "(1)"
- line 403, "pan.___", state 1008, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1008, "else"
- line 403, "pan.___", state 1011, "(1)"
- line 403, "pan.___", state 1012, "(1)"
- line 403, "pan.___", state 1012, "(1)"
- line 401, "pan.___", state 1017, "((j<1))"
- line 401, "pan.___", state 1017, "((j>=1))"
- line 408, "pan.___", state 1023, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1036, "(1)"
- line 409, "pan.___", state 1037, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1037, "else"
- line 409, "pan.___", state 1040, "(1)"
- line 409, "pan.___", state 1041, "(1)"
- line 409, "pan.___", state 1041, "(1)"
- line 413, "pan.___", state 1049, "(1)"
- line 413, "pan.___", state 1050, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1050, "else"
- line 413, "pan.___", state 1053, "(1)"
- line 413, "pan.___", state 1054, "(1)"
- line 413, "pan.___", state 1054, "(1)"
- line 411, "pan.___", state 1059, "((j<1))"
- line 411, "pan.___", state 1059, "((j>=1))"
- line 418, "pan.___", state 1066, "(1)"
- line 418, "pan.___", state 1067, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1067, "else"
- line 418, "pan.___", state 1070, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 194, "pan.___", state 1076, "(1)"
- line 194, "pan.___", state 1076, "(1)"
- line 221, "pan.___", state 1077, "(1)"
- line 221, "pan.___", state 1077, "(1)"
- line 356, "pan.___", state 1083, "((sighand_exec==1))"
- line 356, "pan.___", state 1083, "else"
- line 362, "pan.___", state 1086, "sighand_exec = 1"
- line 399, "pan.___", state 1099, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1101, "(1)"
- line 399, "pan.___", state 1102, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1102, "else"
- line 399, "pan.___", state 1105, "(1)"
- line 403, "pan.___", state 1113, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1115, "(1)"
- line 403, "pan.___", state 1116, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1116, "else"
- line 403, "pan.___", state 1119, "(1)"
- line 403, "pan.___", state 1120, "(1)"
- line 403, "pan.___", state 1120, "(1)"
- line 401, "pan.___", state 1125, "((i<1))"
- line 401, "pan.___", state 1125, "((i>=1))"
- line 408, "pan.___", state 1131, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1144, "(1)"
- line 409, "pan.___", state 1145, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1145, "else"
- line 409, "pan.___", state 1148, "(1)"
- line 409, "pan.___", state 1149, "(1)"
- line 409, "pan.___", state 1149, "(1)"
- line 413, "pan.___", state 1157, "(1)"
- line 413, "pan.___", state 1158, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1158, "else"
- line 413, "pan.___", state 1161, "(1)"
- line 413, "pan.___", state 1162, "(1)"
- line 413, "pan.___", state 1162, "(1)"
- line 411, "pan.___", state 1167, "((i<1))"
- line 411, "pan.___", state 1167, "((i>=1))"
- line 418, "pan.___", state 1174, "(1)"
- line 418, "pan.___", state 1175, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1175, "else"
- line 418, "pan.___", state 1178, "(1)"
- line 418, "pan.___", state 1179, "(1)"
- line 418, "pan.___", state 1179, "(1)"
- line 420, "pan.___", state 1182, "(1)"
- line 420, "pan.___", state 1182, "(1)"
- line 362, "pan.___", state 1191, "sighand_exec = 1"
- line 403, "pan.___", state 1222, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 399, "pan.___", state 1404, "(1)"
- line 403, "pan.___", state 1418, "(1)"
- line 403, "pan.___", state 1518, "(1)"
- line 399, "pan.___", state 1599, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1601, "(1)"
- line 399, "pan.___", state 1602, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1602, "else"
- line 399, "pan.___", state 1605, "(1)"
- line 403, "pan.___", state 1613, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1615, "(1)"
- line 403, "pan.___", state 1616, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1616, "else"
- line 403, "pan.___", state 1619, "(1)"
- line 403, "pan.___", state 1620, "(1)"
- line 403, "pan.___", state 1620, "(1)"
- line 401, "pan.___", state 1625, "((j<1))"
- line 401, "pan.___", state 1625, "((j>=1))"
- line 408, "pan.___", state 1631, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1644, "(1)"
- line 409, "pan.___", state 1645, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1645, "else"
- line 409, "pan.___", state 1648, "(1)"
- line 409, "pan.___", state 1649, "(1)"
- line 409, "pan.___", state 1649, "(1)"
- line 413, "pan.___", state 1657, "(1)"
- line 413, "pan.___", state 1658, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1658, "else"
- line 413, "pan.___", state 1661, "(1)"
- line 413, "pan.___", state 1662, "(1)"
- line 413, "pan.___", state 1662, "(1)"
- line 411, "pan.___", state 1667, "((j<1))"
- line 411, "pan.___", state 1667, "((j>=1))"
- line 418, "pan.___", state 1674, "(1)"
- line 418, "pan.___", state 1675, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1675, "else"
- line 418, "pan.___", state 1678, "(1)"
- line 418, "pan.___", state 1679, "(1)"
- line 418, "pan.___", state 1679, "(1)"
- line 399, "pan.___", state 1690, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1692, "(1)"
- line 399, "pan.___", state 1693, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1693, "else"
- line 399, "pan.___", state 1696, "(1)"
- line 403, "pan.___", state 1704, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1706, "(1)"
- line 403, "pan.___", state 1707, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1707, "else"
- line 403, "pan.___", state 1710, "(1)"
- line 403, "pan.___", state 1711, "(1)"
- line 403, "pan.___", state 1711, "(1)"
- line 401, "pan.___", state 1716, "((j<1))"
- line 401, "pan.___", state 1716, "((j>=1))"
- line 408, "pan.___", state 1722, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1735, "(1)"
- line 409, "pan.___", state 1736, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1736, "else"
- line 409, "pan.___", state 1739, "(1)"
- line 409, "pan.___", state 1740, "(1)"
- line 409, "pan.___", state 1740, "(1)"
- line 413, "pan.___", state 1748, "(1)"
- line 413, "pan.___", state 1749, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1749, "else"
- line 413, "pan.___", state 1752, "(1)"
- line 413, "pan.___", state 1753, "(1)"
- line 413, "pan.___", state 1753, "(1)"
- line 411, "pan.___", state 1758, "((j<1))"
- line 411, "pan.___", state 1758, "((j>=1))"
- line 418, "pan.___", state 1765, "(1)"
- line 418, "pan.___", state 1766, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1766, "else"
- line 418, "pan.___", state 1769, "(1)"
- line 418, "pan.___", state 1770, "(1)"
- line 418, "pan.___", state 1770, "(1)"
- line 194, "pan.___", state 1775, "(1)"
- line 194, "pan.___", state 1775, "(1)"
- line 214, "pan.___", state 1779, "((i<1))"
- line 214, "pan.___", state 1779, "((i>=1))"
- line 399, "pan.___", state 1785, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1787, "(1)"
- line 399, "pan.___", state 1788, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1788, "else"
- line 399, "pan.___", state 1791, "(1)"
- line 403, "pan.___", state 1799, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1801, "(1)"
- line 403, "pan.___", state 1802, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1802, "else"
- line 403, "pan.___", state 1805, "(1)"
- line 403, "pan.___", state 1806, "(1)"
- line 403, "pan.___", state 1806, "(1)"
- line 401, "pan.___", state 1811, "((j<1))"
- line 401, "pan.___", state 1811, "((j>=1))"
- line 408, "pan.___", state 1817, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1830, "(1)"
- line 409, "pan.___", state 1831, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1831, "else"
- line 409, "pan.___", state 1834, "(1)"
- line 409, "pan.___", state 1835, "(1)"
- line 409, "pan.___", state 1835, "(1)"
- line 413, "pan.___", state 1843, "(1)"
- line 413, "pan.___", state 1844, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1844, "else"
- line 413, "pan.___", state 1847, "(1)"
- line 413, "pan.___", state 1848, "(1)"
- line 413, "pan.___", state 1848, "(1)"
- line 411, "pan.___", state 1853, "((j<1))"
- line 411, "pan.___", state 1853, "((j>=1))"
- line 418, "pan.___", state 1860, "(1)"
- line 418, "pan.___", state 1861, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1861, "else"
- line 418, "pan.___", state 1864, "(1)"
- line 418, "pan.___", state 1865, "(1)"
- line 418, "pan.___", state 1865, "(1)"
- line 194, "pan.___", state 1870, "(1)"
- line 194, "pan.___", state 1870, "(1)"
- line 221, "pan.___", state 1871, "(1)"
- line 221, "pan.___", state 1871, "(1)"
- line 356, "pan.___", state 1877, "((sighand_exec==1))"
- line 356, "pan.___", state 1877, "else"
- line 362, "pan.___", state 1880, "sighand_exec = 1"
- line 399, "pan.___", state 1893, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1895, "(1)"
- line 399, "pan.___", state 1896, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1896, "else"
- line 399, "pan.___", state 1899, "(1)"
- line 403, "pan.___", state 1907, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1909, "(1)"
- line 403, "pan.___", state 1910, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1910, "else"
- line 403, "pan.___", state 1913, "(1)"
- line 403, "pan.___", state 1914, "(1)"
- line 403, "pan.___", state 1914, "(1)"
- line 401, "pan.___", state 1919, "((i<1))"
- line 401, "pan.___", state 1919, "((i>=1))"
- line 408, "pan.___", state 1925, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1938, "(1)"
- line 409, "pan.___", state 1939, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1939, "else"
- line 409, "pan.___", state 1942, "(1)"
- line 409, "pan.___", state 1943, "(1)"
- line 409, "pan.___", state 1943, "(1)"
- line 413, "pan.___", state 1951, "(1)"
- line 413, "pan.___", state 1952, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1952, "else"
- line 413, "pan.___", state 1955, "(1)"
- line 413, "pan.___", state 1956, "(1)"
- line 413, "pan.___", state 1956, "(1)"
- line 411, "pan.___", state 1961, "((i<1))"
- line 411, "pan.___", state 1961, "((i>=1))"
- line 418, "pan.___", state 1968, "(1)"
- line 418, "pan.___", state 1969, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1969, "else"
- line 418, "pan.___", state 1972, "(1)"
- line 418, "pan.___", state 1973, "(1)"
- line 418, "pan.___", state 1973, "(1)"
- line 420, "pan.___", state 1976, "(1)"
- line 420, "pan.___", state 1976, "(1)"
- line 362, "pan.___", state 1985, "sighand_exec = 1"
- line 403, "pan.___", state 2016, "(1)"
- line 702, "pan.___", state 2304, "-end-"
- (221 of 2304 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.47 seconds
-pan: rate 109876.87 states/second
-pan: avg transition delay 7.7927e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4249
-2:4:4201
-3:4:4204
-4:4:4204
-5:4:4207
-6:4:4215
-7:4:4215
-8:4:4218
-9:4:4224
-10:4:4228
-11:4:4228
-12:4:4231
-13:4:4239
-14:4:4243
-15:4:4244
-16:0:4249
-17:4:4246
-18:0:4249
-19:3:1991
-20:0:4249
-21:3:1997
-22:0:4249
-23:3:1998
-24:0:4249
-25:3:1999
-26:3:2003
-27:3:2004
-28:3:2012
-29:3:2013
-30:3:2017
-31:3:2018
-32:3:2026
-33:3:2031
-34:3:2035
-35:3:2036
-36:3:2043
-37:3:2044
-38:3:2055
-39:3:2056
-40:3:2057
-41:3:2068
-42:3:2073
-43:3:2074
-44:0:4249
-45:3:2086
-46:0:4249
-47:3:2088
-48:3:2089
-49:0:4249
-50:3:2093
-51:3:2097
-52:3:2098
-53:3:2106
-54:3:2107
-55:3:2111
-56:3:2112
-57:3:2120
-58:3:2125
-59:3:2126
-60:3:2137
-61:3:2138
-62:3:2149
-63:3:2150
-64:3:2151
-65:3:2162
-66:3:2167
-67:3:2168
-68:0:4249
-69:3:2180
-70:0:4249
-71:3:2182
-72:0:4249
-73:3:2183
-74:0:4249
-75:3:2193
-76:0:4249
-77:3:2194
-78:0:4249
-79:3:2195
-80:3:2199
-81:3:2200
-82:3:2208
-83:3:2209
-84:3:2213
-85:3:2214
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-1930:3:4094
-1931:3:4102
-1932:3:4103
-1933:3:4107
-1934:3:4108
-1935:3:4116
-1936:3:4129
-1937:3:4130
-1938:3:4133
-1939:3:4134
-1940:3:4145
-1941:3:4146
-1942:3:4147
-1943:3:4158
-1944:3:4163
-1945:3:4166
-1946:3:4167
-1947:0:4249
-1948:3:4183
-1949:0:4249
-1950:3:4185
-1951:0:4249
-1952:3:4186
-1953:0:4249
-1954:3:4189
-1955:0:4249
-1956:3:4194
-1957:0:4249
-1958:2:1016
-1959:0:4249
-1960:3:4195
-1961:0:4249
-1962:2:1022
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-1964:3:4194
-1965:0:4249
-1966:2:1023
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-1968:3:4195
-1969:0:4249
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-1971:0:4249
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-1973:0:4249
-1974:2:1025
-1975:0:4249
-1976:3:4195
-1977:0:4249
-1978:1:2
-1979:0:4249
-1980:3:4194
-1981:0:4249
-1982:2:1026
-1983:0:4249
-1984:3:4195
-1985:0:4249
-1986:1:8
-1987:0:4249
-1988:3:4194
-1989:0:4249
-1990:2:1025
-1991:0:4249
-1992:3:4195
-1993:0:4249
-1994:1:9
-1995:0:4249
-1996:3:4194
-1997:0:4249
-1998:2:1026
-1999:0:4249
-2000:3:4195
-2001:0:4249
-2002:1:10
-2003:0:4249
-2004:3:4194
-2005:0:4249
-2006:2:1025
-2007:0:4249
-2008:3:4195
-2009:0:4249
-2010:1:11
-2011:0:4249
-2012:3:4194
-2013:0:4249
-2014:2:1026
-2015:0:4249
-2016:3:4195
-2017:0:4249
-2018:1:12
-2019:1:16
-2020:1:17
-2021:1:25
-2022:1:26
-2023:1:30
-2024:1:31
-2025:1:39
-2026:1:44
-2027:1:48
-2028:1:49
-2029:1:56
-2030:1:57
-2031:1:68
-2032:1:69
-2033:1:70
-2034:1:81
-2035:1:86
-2036:1:87
-2037:0:4249
-2038:3:4194
-2039:0:4249
-2040:2:1025
-2041:0:4249
-2042:3:4195
-2043:0:4249
-2044:1:99
-2045:0:4249
-2046:3:4194
-2047:0:4249
-2048:2:1026
-2049:0:4249
-2050:3:4195
-2051:0:4249
-2052:2:1027
-2053:0:4249
-2054:3:4194
-2055:0:4249
-2056:2:1028
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-2059:0:4249
-2060:2:1039
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-2062:3:4194
-2063:0:4249
-2064:2:1040
-2065:0:4249
-2066:3:4195
-2067:0:4249
-2068:2:1041
-2069:2:1045
-2070:2:1046
-2071:2:1054
-2072:2:1055
-2073:2:1059
-2074:2:1060
-2075:2:1068
-2076:2:1073
-2077:2:1077
-2078:2:1078
-2079:2:1085
-2080:2:1086
-2081:2:1097
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-2083:2:1099
-2084:2:1110
-2085:2:1115
-2086:2:1116
-2087:0:4249
-2088:3:4194
-2089:0:4249
-2090:2:1128
-2091:0:4249
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-2093:0:4249
-2094:2:1129
-2095:2:1133
-2096:2:1134
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-2098:2:1143
-2099:2:1147
-2100:2:1148
-2101:2:1156
-2102:2:1161
-2103:2:1165
-2104:2:1166
-2105:2:1173
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-2107:2:1185
-2108:2:1186
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-2113:0:4249
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-2115:0:4249
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-2124:2:1218
-2125:2:1222
-2126:2:1223
-2127:2:1231
-2128:2:1232
-2129:2:1236
-2130:2:1237
-2131:2:1245
-2132:2:1250
-2133:2:1254
-2134:2:1255
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-2136:2:1263
-2137:2:1274
-2138:2:1275
-2139:2:1276
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-2149:0:4249
-2150:2:1590
-2151:0:4249
-2152:3:4195
-2153:0:4249
-2154:2:1591
-2155:0:4249
-2156:3:4194
-2157:0:4249
-2158:2:1596
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-2160:3:4195
-2161:0:4249
-2162:2:1601
-2163:0:4249
-2164:3:4194
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-2166:2:1602
-2167:0:4247
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-2169:0:4253
-2170:2:1211
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10519, errors: 0
- 20146 states, stored
- 191615 states, matched
- 211761 transitions (= stored+matched)
- 711676 atomic steps
-hash conflicts: 1222 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.614 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.509 actual memory usage for states (compression: 93.51%)
- state-vector as stored = 51 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.229 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 174, "pan.___", state 257, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 266, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 279, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 296, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 305, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 318, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 341, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 357, "(1)"
- line 407, "pan.___", state 373, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 386, "(1)"
- line 417, "pan.___", state 416, "(1)"
- line 398, "pan.___", state 442, "(1)"
- line 402, "pan.___", state 456, "(1)"
- line 407, "pan.___", state 472, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 515, "(1)"
- line 402, "pan.___", state 556, "(1)"
- line 407, "pan.___", state 572, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 615, "(1)"
- line 174, "pan.___", state 636, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 638, "(1)"
- line 178, "pan.___", state 645, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 647, "(1)"
- line 178, "pan.___", state 648, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 648, "else"
- line 176, "pan.___", state 653, "((j<1))"
- line 176, "pan.___", state 653, "((j>=1))"
- line 182, "pan.___", state 658, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 660, "(1)"
- line 182, "pan.___", state 661, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 661, "else"
- line 174, "pan.___", state 671, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 673, "(1)"
- line 178, "pan.___", state 680, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 682, "(1)"
- line 178, "pan.___", state 683, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 683, "else"
- line 176, "pan.___", state 688, "((j<1))"
- line 176, "pan.___", state 688, "((j>=1))"
- line 182, "pan.___", state 693, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 695, "(1)"
- line 182, "pan.___", state 696, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 182, "pan.___", state 696, "else"
- line 192, "pan.___", state 701, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 192, "pan.___", state 701, "else"
- line 213, "pan.___", state 705, "((i<1))"
- line 213, "pan.___", state 705, "((i>=1))"
- line 174, "pan.___", state 710, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 712, "(1)"
- line 178, "pan.___", state 719, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 721, "(1)"
- line 178, "pan.___", state 722, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 722, "else"
- line 176, "pan.___", state 727, "((j<1))"
- line 176, "pan.___", state 727, "((j>=1))"
- line 182, "pan.___", state 732, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 734, "(1)"
- line 182, "pan.___", state 735, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 735, "else"
- line 192, "pan.___", state 740, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 192, "pan.___", state 740, "else"
- line 220, "pan.___", state 741, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 741, "else"
- line 355, "pan.___", state 747, "((sighand_exec==1))"
- line 355, "pan.___", state 747, "else"
- line 361, "pan.___", state 750, "sighand_exec = 1"
- line 398, "pan.___", state 763, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 765, "(1)"
- line 398, "pan.___", state 766, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 766, "else"
- line 398, "pan.___", state 769, "(1)"
- line 402, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 779, "(1)"
- line 402, "pan.___", state 780, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 780, "else"
- line 402, "pan.___", state 783, "(1)"
- line 402, "pan.___", state 784, "(1)"
- line 402, "pan.___", state 784, "(1)"
- line 400, "pan.___", state 789, "((i<1))"
- line 400, "pan.___", state 789, "((i>=1))"
- line 407, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 808, "(1)"
- line 408, "pan.___", state 809, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 809, "else"
- line 408, "pan.___", state 812, "(1)"
- line 408, "pan.___", state 813, "(1)"
- line 408, "pan.___", state 813, "(1)"
- line 412, "pan.___", state 821, "(1)"
- line 412, "pan.___", state 822, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 822, "else"
- line 412, "pan.___", state 825, "(1)"
- line 412, "pan.___", state 826, "(1)"
- line 412, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 831, "((i<1))"
- line 410, "pan.___", state 831, "((i>=1))"
- line 417, "pan.___", state 838, "(1)"
- line 417, "pan.___", state 839, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 839, "else"
- line 417, "pan.___", state 842, "(1)"
- line 417, "pan.___", state 843, "(1)"
- line 417, "pan.___", state 843, "(1)"
- line 419, "pan.___", state 846, "(1)"
- line 419, "pan.___", state 846, "(1)"
- line 361, "pan.___", state 855, "sighand_exec = 1"
- line 402, "pan.___", state 886, "(1)"
- line 407, "pan.___", state 902, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 945, "(1)"
- line 402, "pan.___", state 983, "(1)"
- line 407, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1042, "(1)"
- line 398, "pan.___", state 1068, "(1)"
- line 402, "pan.___", state 1082, "(1)"
- line 407, "pan.___", state 1098, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1141, "(1)"
- line 402, "pan.___", state 1182, "(1)"
- line 407, "pan.___", state 1198, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1241, "(1)"
- line 174, "pan.___", state 1262, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1264, "(1)"
- line 178, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1273, "(1)"
- line 178, "pan.___", state 1274, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1274, "else"
- line 176, "pan.___", state 1279, "((j<1))"
- line 176, "pan.___", state 1279, "((j>=1))"
- line 182, "pan.___", state 1284, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1286, "(1)"
- line 182, "pan.___", state 1287, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 1287, "else"
- line 174, "pan.___", state 1297, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1299, "(1)"
- line 178, "pan.___", state 1306, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1308, "(1)"
- line 178, "pan.___", state 1309, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 1309, "else"
- line 176, "pan.___", state 1314, "((j<1))"
- line 176, "pan.___", state 1314, "((j>=1))"
- line 182, "pan.___", state 1319, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1321, "(1)"
- line 182, "pan.___", state 1322, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 182, "pan.___", state 1322, "else"
- line 192, "pan.___", state 1327, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 192, "pan.___", state 1327, "else"
- line 213, "pan.___", state 1331, "((i<1))"
- line 213, "pan.___", state 1331, "((i>=1))"
- line 174, "pan.___", state 1336, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1338, "(1)"
- line 178, "pan.___", state 1345, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1347, "(1)"
- line 178, "pan.___", state 1348, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1348, "else"
- line 176, "pan.___", state 1353, "((j<1))"
- line 176, "pan.___", state 1353, "((j>=1))"
- line 182, "pan.___", state 1358, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1360, "(1)"
- line 182, "pan.___", state 1361, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 1361, "else"
- line 192, "pan.___", state 1366, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 192, "pan.___", state 1366, "else"
- line 220, "pan.___", state 1367, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 1367, "else"
- line 355, "pan.___", state 1373, "((sighand_exec==1))"
- line 355, "pan.___", state 1373, "else"
- line 361, "pan.___", state 1376, "sighand_exec = 1"
- line 398, "pan.___", state 1389, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1391, "(1)"
- line 398, "pan.___", state 1392, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1392, "else"
- line 398, "pan.___", state 1395, "(1)"
- line 402, "pan.___", state 1403, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1405, "(1)"
- line 402, "pan.___", state 1406, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1406, "else"
- line 402, "pan.___", state 1409, "(1)"
- line 402, "pan.___", state 1410, "(1)"
- line 402, "pan.___", state 1410, "(1)"
- line 400, "pan.___", state 1415, "((i<1))"
- line 400, "pan.___", state 1415, "((i>=1))"
- line 407, "pan.___", state 1421, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1434, "(1)"
- line 408, "pan.___", state 1435, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1435, "else"
- line 408, "pan.___", state 1438, "(1)"
- line 408, "pan.___", state 1439, "(1)"
- line 408, "pan.___", state 1439, "(1)"
- line 412, "pan.___", state 1447, "(1)"
- line 412, "pan.___", state 1448, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1448, "else"
- line 412, "pan.___", state 1451, "(1)"
- line 412, "pan.___", state 1452, "(1)"
- line 412, "pan.___", state 1452, "(1)"
- line 410, "pan.___", state 1457, "((i<1))"
- line 410, "pan.___", state 1457, "((i>=1))"
- line 417, "pan.___", state 1464, "(1)"
- line 417, "pan.___", state 1465, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1465, "else"
- line 417, "pan.___", state 1468, "(1)"
- line 417, "pan.___", state 1469, "(1)"
- line 417, "pan.___", state 1469, "(1)"
- line 419, "pan.___", state 1472, "(1)"
- line 419, "pan.___", state 1472, "(1)"
- line 361, "pan.___", state 1481, "sighand_exec = 1"
- line 178, "pan.___", state 1506, "(1)"
- line 182, "pan.___", state 1517, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1530, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1539, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1552, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 701, "pan.___", state 1632, "-end-"
- (167 of 1632 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 747, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.15 seconds
-pan: rate 134306.67 states/second
-pan: avg transition delay 7.0835e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-1601:3:2416
-1602:3:2417
-1603:3:2425
-1604:3:2426
-1605:3:2430
-1606:3:2431
-1607:3:2439
-1608:3:2444
-1609:3:2448
-1610:3:2449
-1611:3:2456
-1612:3:2457
-1613:3:2468
-1614:3:2469
-1615:3:2470
-1616:3:2481
-1617:3:2486
-1618:3:2487
-1619:0:2905
-1620:3:2499
-1621:0:2905
-1622:3:2617
-1623:0:2905
-1624:3:2715
-1625:0:2905
-1626:3:2716
-1627:0:2905
-1628:3:2720
-1629:0:2905
-1630:3:2726
-1631:0:2905
-1632:3:2730
-1633:3:2731
-1634:3:2735
-1635:3:2739
-1636:3:2740
-1637:3:2744
-1638:3:2752
-1639:3:2753
-1640:0:2905
-1641:3:2761
-1642:0:2905
-1643:3:2765
-1644:3:2766
-1645:3:2770
-1646:3:2774
-1647:3:2775
-1648:3:2779
-1649:3:2787
-1650:3:2788
-1651:0:2905
-1652:3:2796
-1653:0:2905
-1654:3:2804
-1655:3:2805
-1656:3:2809
-1657:3:2813
-1658:3:2814
-1659:3:2818
-1660:3:2826
-1661:3:2827
-1662:0:2905
-1663:3:2839
-1664:0:2905
-1665:3:2841
-1666:0:2905
-1667:3:2842
-1668:0:2905
-1669:3:2845
-1670:0:2905
-1671:3:2850
-1672:0:2905
-1673:2:689
-1674:0:2905
-1675:3:2851
-1676:0:2905
-1677:1:99
-1678:0:2905
-1679:3:2850
-1680:0:2905
-1681:2:690
-1682:0:2905
-1683:3:2851
-1684:0:2905
-1685:2:691
-1686:0:2905
-1687:3:2850
-1688:0:2905
-1689:2:692
-1690:0:2905
-1691:3:2851
-1692:0:2905
-1693:2:703
-1694:0:2905
-1695:3:2850
-1696:0:2905
-1697:2:704
-1698:0:2905
-1699:3:2851
-1700:0:2905
-1701:2:705
-1702:2:709
-1703:2:710
-1704:2:718
-1705:2:719
-1706:2:723
-1707:2:724
-1708:2:732
-1709:2:737
-1710:2:741
-1711:2:742
-1712:2:749
-1713:2:750
-1714:2:761
-1715:2:762
-1716:2:763
-1717:2:774
-1718:2:786
-1719:2:787
-1720:0:2905
-1721:3:2850
-1722:0:2905
-1723:2:792
-1724:0:2905
-1725:3:2851
-1726:0:2905
-1727:2:793
-1728:2:797
-1729:2:798
-1730:2:806
-1731:2:807
-1732:2:811
-1733:2:812
-1734:2:820
-1735:2:825
-1736:2:829
-1737:2:830
-1738:2:837
-1739:2:838
-1740:2:849
-1741:2:850
-1742:2:851
-1743:2:862
-1744:2:874
-1745:2:875
-1746:0:2905
-1747:3:2850
-1748:0:2905
-1749:2:880
-1750:0:2905
-1751:3:2851
-1752:0:2905
-1753:2:881
-1754:0:2905
-1755:3:2850
-1756:0:2905
-1757:2:882
-1758:2:886
-1759:2:887
-1760:2:895
-1761:2:896
-1762:2:900
-1763:2:901
-1764:2:909
-1765:2:914
-1766:2:918
-1767:2:919
-1768:2:926
-1769:2:927
-1770:2:938
-1771:2:939
-1772:2:940
-1773:2:951
-1774:2:963
-1775:2:964
-1776:0:2905
-1777:3:2851
-1778:0:2905
-1779:2:969
-1780:0:2905
-1781:3:2850
-1782:0:2905
-1783:2:1086
-1784:0:2905
-1785:3:2851
-1786:0:2905
-1787:2:1087
-1788:0:2905
-1789:3:2850
-1790:0:2905
-1791:2:1092
-1792:0:2905
-1793:3:2851
-1794:0:2905
-1795:2:1097
-1796:0:2905
-1797:3:2850
-1798:0:2905
-1799:2:1098
-1800:0:2903
-1801:3:2851
-1802:0:2909
-1803:3:1630
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10499, errors: 0
- 159431 states, stored
- 1505398 states, matched
- 1664829 transitions (= stored+matched)
- 5794809 atomic steps
-hash conflicts: 62144 (resolved)
-
-Stats on memory usage (in Megabytes):
- 12.772 equivalent memory usage for states (stored*(State-vector + overhead))
- 8.936 actual memory usage for states (compression: 69.96%)
- state-vector as stored = 31 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 474.651 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 651, "pan.___", state 213, "(1)"
- line 402, "pan.___", state 348, "(1)"
- line 398, "pan.___", state 433, "(1)"
- line 402, "pan.___", state 447, "(1)"
- line 402, "pan.___", state 547, "(1)"
- line 159, "pan.___", state 628, "(1)"
- line 163, "pan.___", state 636, "(1)"
- line 163, "pan.___", state 637, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 637, "else"
- line 161, "pan.___", state 642, "((j<1))"
- line 161, "pan.___", state 642, "((j>=1))"
- line 167, "pan.___", state 648, "(1)"
- line 167, "pan.___", state 649, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 649, "else"
- line 159, "pan.___", state 660, "(1)"
- line 163, "pan.___", state 668, "(1)"
- line 163, "pan.___", state 669, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 669, "else"
- line 161, "pan.___", state 674, "((j<1))"
- line 161, "pan.___", state 674, "((j>=1))"
- line 167, "pan.___", state 680, "(1)"
- line 167, "pan.___", state 681, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 681, "else"
- line 201, "pan.___", state 686, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 201, "pan.___", state 686, "else"
- line 213, "pan.___", state 690, "((i<1))"
- line 213, "pan.___", state 690, "((i>=1))"
- line 159, "pan.___", state 696, "(1)"
- line 163, "pan.___", state 704, "(1)"
- line 163, "pan.___", state 705, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 705, "else"
- line 161, "pan.___", state 710, "((j<1))"
- line 161, "pan.___", state 710, "((j>=1))"
- line 167, "pan.___", state 716, "(1)"
- line 167, "pan.___", state 717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 717, "else"
- line 201, "pan.___", state 722, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 201, "pan.___", state 722, "else"
- line 220, "pan.___", state 723, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 220, "pan.___", state 723, "else"
- line 355, "pan.___", state 729, "((sighand_exec==1))"
- line 355, "pan.___", state 729, "else"
- line 361, "pan.___", state 732, "sighand_exec = 1"
- line 398, "pan.___", state 745, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 747, "(1)"
- line 398, "pan.___", state 748, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 748, "else"
- line 398, "pan.___", state 751, "(1)"
- line 402, "pan.___", state 759, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 761, "(1)"
- line 402, "pan.___", state 762, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 762, "else"
- line 402, "pan.___", state 765, "(1)"
- line 402, "pan.___", state 766, "(1)"
- line 402, "pan.___", state 766, "(1)"
- line 400, "pan.___", state 771, "((i<1))"
- line 400, "pan.___", state 771, "((i>=1))"
- line 407, "pan.___", state 777, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 790, "(1)"
- line 408, "pan.___", state 791, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 791, "else"
- line 408, "pan.___", state 794, "(1)"
- line 408, "pan.___", state 795, "(1)"
- line 408, "pan.___", state 795, "(1)"
- line 412, "pan.___", state 803, "(1)"
- line 412, "pan.___", state 804, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 804, "else"
- line 412, "pan.___", state 807, "(1)"
- line 412, "pan.___", state 808, "(1)"
- line 412, "pan.___", state 808, "(1)"
- line 410, "pan.___", state 813, "((i<1))"
- line 410, "pan.___", state 813, "((i>=1))"
- line 417, "pan.___", state 820, "(1)"
- line 417, "pan.___", state 821, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 821, "else"
- line 417, "pan.___", state 824, "(1)"
- line 417, "pan.___", state 825, "(1)"
- line 417, "pan.___", state 825, "(1)"
- line 419, "pan.___", state 828, "(1)"
- line 419, "pan.___", state 828, "(1)"
- line 361, "pan.___", state 837, "sighand_exec = 1"
- line 402, "pan.___", state 868, "(1)"
- line 402, "pan.___", state 965, "(1)"
- line 398, "pan.___", state 1050, "(1)"
- line 402, "pan.___", state 1064, "(1)"
- line 402, "pan.___", state 1164, "(1)"
- line 159, "pan.___", state 1245, "(1)"
- line 163, "pan.___", state 1253, "(1)"
- line 163, "pan.___", state 1254, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1254, "else"
- line 161, "pan.___", state 1259, "((j<1))"
- line 161, "pan.___", state 1259, "((j>=1))"
- line 167, "pan.___", state 1265, "(1)"
- line 167, "pan.___", state 1266, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1266, "else"
- line 159, "pan.___", state 1277, "(1)"
- line 163, "pan.___", state 1285, "(1)"
- line 163, "pan.___", state 1286, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 1286, "else"
- line 161, "pan.___", state 1291, "((j<1))"
- line 161, "pan.___", state 1291, "((j>=1))"
- line 167, "pan.___", state 1297, "(1)"
- line 167, "pan.___", state 1298, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 1298, "else"
- line 201, "pan.___", state 1303, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 201, "pan.___", state 1303, "else"
- line 213, "pan.___", state 1307, "((i<1))"
- line 213, "pan.___", state 1307, "((i>=1))"
- line 159, "pan.___", state 1313, "(1)"
- line 163, "pan.___", state 1321, "(1)"
- line 163, "pan.___", state 1322, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1322, "else"
- line 161, "pan.___", state 1327, "((j<1))"
- line 161, "pan.___", state 1327, "((j>=1))"
- line 167, "pan.___", state 1333, "(1)"
- line 167, "pan.___", state 1334, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1334, "else"
- line 201, "pan.___", state 1339, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 201, "pan.___", state 1339, "else"
- line 220, "pan.___", state 1340, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 220, "pan.___", state 1340, "else"
- line 355, "pan.___", state 1346, "((sighand_exec==1))"
- line 355, "pan.___", state 1346, "else"
- line 361, "pan.___", state 1349, "sighand_exec = 1"
- line 398, "pan.___", state 1362, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1364, "(1)"
- line 398, "pan.___", state 1365, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1365, "else"
- line 398, "pan.___", state 1368, "(1)"
- line 402, "pan.___", state 1376, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1378, "(1)"
- line 402, "pan.___", state 1379, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1379, "else"
- line 402, "pan.___", state 1382, "(1)"
- line 402, "pan.___", state 1383, "(1)"
- line 402, "pan.___", state 1383, "(1)"
- line 400, "pan.___", state 1388, "((i<1))"
- line 400, "pan.___", state 1388, "((i>=1))"
- line 407, "pan.___", state 1394, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1407, "(1)"
- line 408, "pan.___", state 1408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1408, "else"
- line 408, "pan.___", state 1411, "(1)"
- line 408, "pan.___", state 1412, "(1)"
- line 408, "pan.___", state 1412, "(1)"
- line 412, "pan.___", state 1420, "(1)"
- line 412, "pan.___", state 1421, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1421, "else"
- line 412, "pan.___", state 1424, "(1)"
- line 412, "pan.___", state 1425, "(1)"
- line 412, "pan.___", state 1425, "(1)"
- line 410, "pan.___", state 1430, "((i<1))"
- line 410, "pan.___", state 1430, "((i>=1))"
- line 417, "pan.___", state 1437, "(1)"
- line 417, "pan.___", state 1438, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1438, "else"
- line 417, "pan.___", state 1441, "(1)"
- line 417, "pan.___", state 1442, "(1)"
- line 417, "pan.___", state 1442, "(1)"
- line 419, "pan.___", state 1445, "(1)"
- line 419, "pan.___", state 1445, "(1)"
- line 361, "pan.___", state 1454, "sighand_exec = 1"
- line 701, "pan.___", state 1596, "-end-"
- (111 of 1596 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 747, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.23 seconds
-pan: rate 129618.7 states/second
-pan: avg transition delay 7.3881e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-2:4:2785
-3:4:2788
-4:4:2788
-5:4:2791
-6:4:2799
-7:4:2799
-8:4:2802
-9:4:2808
-10:4:2812
-11:4:2812
-12:4:2815
-13:4:2823
-14:4:2827
-15:4:2828
-16:0:2833
-17:4:2830
-18:0:2833
-19:3:1283
-20:0:2833
-21:3:1289
-22:0:2833
-23:3:1290
-24:0:2833
-25:3:1291
-26:3:1295
-27:3:1296
-28:3:1304
-29:3:1305
-30:3:1309
-31:3:1310
-32:3:1318
-33:3:1323
-34:3:1327
-35:3:1328
-36:3:1335
-37:3:1336
-38:3:1347
-39:3:1348
-40:3:1349
-41:3:1360
-42:3:1365
-43:3:1366
-44:0:2833
-45:3:1378
-46:0:2833
-47:3:1380
-48:3:1381
-49:0:2833
-50:3:1385
-51:3:1389
-52:3:1390
-53:3:1398
-54:3:1399
-55:3:1403
-56:3:1404
-57:3:1412
-58:3:1417
-59:3:1418
-60:3:1429
-61:3:1430
-62:3:1441
-63:3:1442
-64:3:1443
-65:3:1454
-66:3:1459
-67:3:1460
-68:0:2833
-69:3:1472
-70:0:2833
-71:3:1474
-72:0:2833
-73:3:1475
-74:0:2833
-75:3:1485
-76:0:2833
-77:3:1486
-78:0:2833
-79:3:1487
-80:3:1494
-81:3:1495
-82:3:1502
-83:3:1507
-84:0:2833
-85:3:1518
-86:0:2833
-87:3:1519
-88:3:1526
-89:3:1527
-90:3:1534
-91:3:1539
-92:0:2833
-93:3:1550
-94:0:2833
-95:3:1555
-96:3:1562
-97:3:1563
-98:3:1570
-99:3:1575
-100:0:2833
-101:3:1590
-102:0:2833
-103:3:1592
-104:0:2833
-105:3:1593
-106:3:1597
-107:3:1598
-108:3:1606
-109:3:1607
-110:3:1611
-111:3:1612
-112:3:1620
-113:3:1625
-114:3:1629
-115:3:1630
-116:3:1637
-117:3:1638
-118:3:1649
-119:3:1650
-120:3:1651
-121:3:1662
-122:3:1667
-123:3:1668
-124:0:2833
-125:3:1680
-126:0:2833
-127:3:1682
-128:0:2833
-129:3:1685
-130:3:1686
-131:3:1698
-132:3:1699
-133:3:1703
-134:3:1704
-135:3:1712
-136:3:1717
-137:3:1721
-138:3:1722
-139:3:1729
-140:3:1730
-141:3:1741
-142:3:1742
-143:3:1743
-144:3:1754
-145:3:1759
-146:3:1760
-147:0:2833
-148:3:1772
-149:0:2833
-150:3:1774
-151:0:2833
-152:3:1775
-153:0:2833
-154:3:1776
-155:0:2833
-156:3:1777
-157:0:2833
-158:3:1778
-159:3:1782
-160:3:1783
-161:3:1791
-162:3:1792
-163:3:1796
-164:3:1797
-165:3:1805
-166:3:1810
-167:3:1814
-168:3:1815
-169:3:1822
-170:3:1823
-171:3:1834
-172:3:1835
-173:3:1836
-174:3:1847
-175:3:1852
-176:3:1853
-177:0:2833
-178:3:1865
-179:0:2833
-180:3:1974
-181:0:2833
-182:3:2072
-183:0:2833
-184:3:2073
-185:0:2833
-186:3:2077
-187:0:2833
-188:3:2083
-189:3:2087
-190:3:2088
-191:3:2096
-192:3:2097
-193:3:2101
-194:3:2102
-195:3:2110
-196:3:2115
-197:3:2119
-198:3:2120
-199:3:2127
-200:3:2128
-201:3:2139
-202:3:2140
-203:3:2141
-204:3:2152
-205:3:2157
-206:3:2158
-207:0:2833
-208:3:2170
-209:0:2833
-210:3:2172
-211:0:2833
-212:3:2173
-213:3:2177
-214:3:2178
-215:3:2186
-216:3:2187
-217:3:2191
-218:3:2192
-219:3:2200
-220:3:2205
-221:3:2209
-222:3:2210
-223:3:2217
-224:3:2218
-225:3:2229
-226:3:2230
-227:3:2231
-228:3:2242
-229:3:2247
-230:3:2248
-231:0:2833
-232:3:2260
-233:0:2833
-234:3:2262
-235:0:2833
-236:3:2265
-237:3:2266
-238:3:2278
-239:3:2279
-240:3:2283
-241:3:2284
-242:3:2292
-243:3:2297
-244:3:2301
-245:3:2302
-246:3:2309
-247:3:2310
-248:3:2321
-249:3:2322
-250:3:2323
-251:3:2334
-252:3:2339
-253:3:2340
-254:0:2833
-255:3:2352
-256:0:2833
-257:3:2354
-258:0:2833
-259:3:2355
-260:0:2833
-261:3:2356
-262:0:2833
-263:3:2357
-264:0:2833
-265:3:2358
-266:3:2362
-267:3:2363
-268:3:2371
-269:3:2372
-270:3:2376
-271:3:2377
-272:3:2385
-273:3:2390
-274:3:2394
-275:3:2395
-276:3:2402
-277:3:2403
-278:3:2414
-279:3:2415
-280:3:2416
-281:3:2427
-282:3:2432
-283:3:2433
-284:0:2833
-285:3:2445
-286:0:2833
-287:3:2554
-288:0:2833
-289:3:2652
-290:0:2833
-291:3:2653
-292:0:2833
-293:3:2657
-294:0:2833
-295:3:2663
-296:0:2833
-297:3:2664
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+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 6934, errors: 0
- 7626 states, stored
- 67235 states, matched
- 74861 transitions (= stored+matched)
- 248896 atomic steps
-hash conflicts: 113 (resolved)
-
-Stats on memory usage (in Megabytes):
- 0.611 equivalent memory usage for states (stored*(State-vector + overhead))
- 0.867 actual memory usage for states (unsuccessful compression: 141.88%)
- state-vector as stored = 91 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 466.545 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 159, "pan.___", state 254, "(1)"
- line 163, "pan.___", state 262, "(1)"
- line 167, "pan.___", state 274, "(1)"
- line 174, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 317, "(1)"
- line 163, "pan.___", state 325, "(1)"
- line 167, "pan.___", state 337, "(1)"
- line 174, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 384, "(1)"
- line 163, "pan.___", state 392, "(1)"
- line 167, "pan.___", state 404, "(1)"
- line 398, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 441, "(1)"
- line 407, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 470, "(1)"
- line 417, "pan.___", state 500, "(1)"
- line 398, "pan.___", state 526, "(1)"
- line 402, "pan.___", state 540, "(1)"
- line 407, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 599, "(1)"
- line 402, "pan.___", state 640, "(1)"
- line 407, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 699, "(1)"
- line 174, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 722, "(1)"
- line 178, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 731, "(1)"
- line 178, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 732, "else"
- line 176, "pan.___", state 737, "((j<1))"
- line 176, "pan.___", state 737, "((j>=1))"
- line 182, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 752, "(1)"
- line 163, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 761, "else"
- line 161, "pan.___", state 766, "((j<1))"
- line 161, "pan.___", state 766, "((j>=1))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 773, "else"
- line 169, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 776, "else"
- line 174, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 785, "(1)"
- line 178, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 794, "(1)"
- line 178, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 795, "else"
- line 176, "pan.___", state 800, "((j<1))"
- line 176, "pan.___", state 800, "((j>=1))"
- line 182, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 815, "(1)"
- line 163, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 824, "else"
- line 161, "pan.___", state 829, "((j<1))"
- line 161, "pan.___", state 829, "((j>=1))"
- line 167, "pan.___", state 835, "(1)"
- line 167, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 836, "else"
- line 169, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 839, "else"
- line 201, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 841, "else"
- line 213, "pan.___", state 845, "((i<1))"
- line 213, "pan.___", state 845, "((i>=1))"
- line 174, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 852, "(1)"
- line 178, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 861, "(1)"
- line 178, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 862, "else"
- line 176, "pan.___", state 867, "((j<1))"
- line 176, "pan.___", state 867, "((j>=1))"
- line 182, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 882, "(1)"
- line 163, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 891, "else"
- line 161, "pan.___", state 896, "((j<1))"
- line 161, "pan.___", state 896, "((j>=1))"
- line 167, "pan.___", state 902, "(1)"
- line 167, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 903, "else"
- line 169, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 906, "else"
- line 201, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 908, "else"
- line 220, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 909, "else"
- line 355, "pan.___", state 915, "((sighand_exec==1))"
- line 355, "pan.___", state 915, "else"
- line 361, "pan.___", state 918, "sighand_exec = 1"
- line 398, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 933, "(1)"
- line 398, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 934, "else"
- line 398, "pan.___", state 937, "(1)"
- line 402, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 947, "(1)"
- line 402, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 948, "else"
- line 402, "pan.___", state 951, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 400, "pan.___", state 957, "((i<1))"
- line 400, "pan.___", state 957, "((i>=1))"
- line 407, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 976, "(1)"
- line 408, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 977, "else"
- line 408, "pan.___", state 980, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 412, "pan.___", state 989, "(1)"
- line 412, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 990, "else"
- line 412, "pan.___", state 993, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 410, "pan.___", state 999, "((i<1))"
- line 410, "pan.___", state 999, "((i>=1))"
- line 417, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1007, "else"
- line 417, "pan.___", state 1010, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 361, "pan.___", state 1023, "sighand_exec = 1"
- line 178, "pan.___", state 1048, "(1)"
- line 182, "pan.___", state 1059, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1069, "(1)"
- line 163, "pan.___", state 1077, "(1)"
- line 167, "pan.___", state 1089, "(1)"
- line 174, "pan.___", state 1100, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1109, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1122, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1132, "(1)"
- line 163, "pan.___", state 1140, "(1)"
- line 167, "pan.___", state 1152, "(1)"
- line 174, "pan.___", state 1167, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1176, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1189, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1199, "(1)"
- line 163, "pan.___", state 1207, "(1)"
- line 167, "pan.___", state 1219, "(1)"
- line 701, "pan.___", state 1258, "-end-"
- (128 of 1258 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 747, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.05 seconds
-pan: rate 152520 states/second
-pan: avg transition delay 6.679e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:2904
-2:4:2856
-3:4:2859
-4:4:2859
-5:4:2862
-6:4:2870
-7:4:2870
-8:4:2873
-9:4:2879
-10:4:2883
-11:4:2883
-12:4:2886
-13:4:2894
-14:4:2898
-15:4:2899
-16:0:2904
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-18:0:2904
-19:3:1655
-20:0:2904
-21:3:1661
-22:0:2904
-23:3:1662
-24:0:2904
-25:3:1663
-26:3:1667
-27:3:1668
-28:3:1676
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-30:3:1681
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-32:3:1690
-33:3:1695
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-35:3:1700
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-39:3:1720
-40:3:1721
-41:3:1732
-42:3:1737
-43:3:1738
-44:0:2904
-45:3:1750
-46:0:2904
-47:3:1752
-48:3:1753
-49:0:2904
-50:3:1757
-51:3:1761
-52:3:1762
-53:3:1770
-54:3:1771
-55:3:1775
-56:3:1776
-57:3:1784
-58:3:1789
-59:3:1790
-60:3:1801
-61:3:1802
-62:3:1813
-63:3:1814
-64:3:1815
-65:3:1826
-66:3:1831
-67:3:1832
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-97:3:1930
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-99:3:1935
-100:3:1939
-101:3:1947
-102:3:1948
-103:3:1953
-104:3:1960
-105:3:1961
-106:3:1968
-107:3:1973
-108:0:2904
-109:3:1984
-110:0:2904
-111:3:1992
-112:3:1993
-113:3:1997
-114:3:2001
-115:3:2002
-116:3:2006
-117:3:2014
-118:3:2015
-119:3:2020
-120:3:2027
-121:3:2028
-122:3:2035
-123:3:2040
-124:0:2904
-125:3:2055
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-128:0:2904
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-131:3:2063
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-133:3:2072
-134:3:2076
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-140:3:2102
-141:3:2103
-142:3:2114
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-146:3:2132
-147:3:2133
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-152:0:2904
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-191:3:2279
-192:3:2280
-193:3:2287
-194:3:2288
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-280:3:1708
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-287:0:2904
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-289:0:2904
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-315:0:2904
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-319:0:2904
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-321:0:2904
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-325:3:1871
-326:3:1872
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-328:3:1884
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-414:0:2904
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-416:0:2904
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+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-depth 12: Claim reached state 9 (line 747)
-depth 86: Claim reached state 9 (line 746)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10679, errors: 0
- 38182 states, stored (88898 visited)
- 997091 states, matched
- 1085989 transitions (= visited+matched)
- 3694897 atomic steps
-hash conflicts: 9602 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3.059 equivalent memory usage for states (stored*(State-vector + overhead))
- 2.930 actual memory usage for states (compression: 95.79%)
- state-vector as stored = 52 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 468.596 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 159, "pan.___", state 254, "(1)"
- line 163, "pan.___", state 262, "(1)"
- line 167, "pan.___", state 274, "(1)"
- line 174, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 317, "(1)"
- line 163, "pan.___", state 325, "(1)"
- line 167, "pan.___", state 337, "(1)"
- line 174, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 384, "(1)"
- line 163, "pan.___", state 392, "(1)"
- line 167, "pan.___", state 404, "(1)"
- line 398, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 441, "(1)"
- line 407, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 470, "(1)"
- line 417, "pan.___", state 500, "(1)"
- line 398, "pan.___", state 526, "(1)"
- line 402, "pan.___", state 540, "(1)"
- line 407, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 599, "(1)"
- line 402, "pan.___", state 640, "(1)"
- line 407, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 699, "(1)"
- line 174, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 722, "(1)"
- line 178, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 731, "(1)"
- line 178, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 732, "else"
- line 176, "pan.___", state 737, "((j<1))"
- line 176, "pan.___", state 737, "((j>=1))"
- line 182, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 752, "(1)"
- line 163, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 761, "else"
- line 161, "pan.___", state 766, "((j<1))"
- line 161, "pan.___", state 766, "((j>=1))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 773, "else"
- line 169, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 776, "else"
- line 174, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 785, "(1)"
- line 178, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 794, "(1)"
- line 178, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 795, "else"
- line 176, "pan.___", state 800, "((j<1))"
- line 176, "pan.___", state 800, "((j>=1))"
- line 182, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 815, "(1)"
- line 163, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 824, "else"
- line 161, "pan.___", state 829, "((j<1))"
- line 161, "pan.___", state 829, "((j>=1))"
- line 167, "pan.___", state 835, "(1)"
- line 167, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 836, "else"
- line 169, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 839, "else"
- line 201, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 841, "else"
- line 213, "pan.___", state 845, "((i<1))"
- line 213, "pan.___", state 845, "((i>=1))"
- line 174, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 852, "(1)"
- line 178, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 861, "(1)"
- line 178, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 862, "else"
- line 176, "pan.___", state 867, "((j<1))"
- line 176, "pan.___", state 867, "((j>=1))"
- line 182, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 882, "(1)"
- line 163, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 891, "else"
- line 161, "pan.___", state 896, "((j<1))"
- line 161, "pan.___", state 896, "((j>=1))"
- line 167, "pan.___", state 902, "(1)"
- line 167, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 903, "else"
- line 169, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 906, "else"
- line 201, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 908, "else"
- line 220, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 909, "else"
- line 355, "pan.___", state 915, "((sighand_exec==1))"
- line 355, "pan.___", state 915, "else"
- line 361, "pan.___", state 918, "sighand_exec = 1"
- line 398, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 933, "(1)"
- line 398, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 934, "else"
- line 398, "pan.___", state 937, "(1)"
- line 402, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 947, "(1)"
- line 402, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 948, "else"
- line 402, "pan.___", state 951, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 400, "pan.___", state 957, "((i<1))"
- line 400, "pan.___", state 957, "((i>=1))"
- line 407, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 976, "(1)"
- line 408, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 977, "else"
- line 408, "pan.___", state 980, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 412, "pan.___", state 989, "(1)"
- line 412, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 990, "else"
- line 412, "pan.___", state 993, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 410, "pan.___", state 999, "((i<1))"
- line 410, "pan.___", state 999, "((i>=1))"
- line 417, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1007, "else"
- line 417, "pan.___", state 1010, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 361, "pan.___", state 1023, "sighand_exec = 1"
- line 402, "pan.___", state 1054, "(1)"
- line 407, "pan.___", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1113, "(1)"
- line 402, "pan.___", state 1151, "(1)"
- line 407, "pan.___", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1210, "(1)"
- line 398, "pan.___", state 1236, "(1)"
- line 402, "pan.___", state 1250, "(1)"
- line 407, "pan.___", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1309, "(1)"
- line 402, "pan.___", state 1350, "(1)"
- line 407, "pan.___", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1409, "(1)"
- line 174, "pan.___", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1432, "(1)"
- line 178, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1441, "(1)"
- line 178, "pan.___", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1442, "else"
- line 176, "pan.___", state 1447, "((j<1))"
- line 176, "pan.___", state 1447, "((j>=1))"
- line 182, "pan.___", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1462, "(1)"
- line 163, "pan.___", state 1470, "(1)"
- line 163, "pan.___", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1471, "else"
- line 161, "pan.___", state 1476, "((j<1))"
- line 161, "pan.___", state 1476, "((j>=1))"
- line 167, "pan.___", state 1482, "(1)"
- line 167, "pan.___", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1483, "else"
- line 169, "pan.___", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1486, "else"
- line 174, "pan.___", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1495, "(1)"
- line 178, "pan.___", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1504, "(1)"
- line 178, "pan.___", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 1505, "else"
- line 176, "pan.___", state 1510, "((j<1))"
- line 176, "pan.___", state 1510, "((j>=1))"
- line 182, "pan.___", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1525, "(1)"
- line 163, "pan.___", state 1533, "(1)"
- line 163, "pan.___", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 1534, "else"
- line 161, "pan.___", state 1539, "((j<1))"
- line 161, "pan.___", state 1539, "((j>=1))"
- line 167, "pan.___", state 1545, "(1)"
- line 167, "pan.___", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 1546, "else"
- line 169, "pan.___", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 1549, "else"
- line 201, "pan.___", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 1551, "else"
- line 213, "pan.___", state 1555, "((i<1))"
- line 213, "pan.___", state 1555, "((i>=1))"
- line 174, "pan.___", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1562, "(1)"
- line 178, "pan.___", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1571, "(1)"
- line 178, "pan.___", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1572, "else"
- line 176, "pan.___", state 1577, "((j<1))"
- line 176, "pan.___", state 1577, "((j>=1))"
- line 182, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1592, "(1)"
- line 163, "pan.___", state 1600, "(1)"
- line 163, "pan.___", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1601, "else"
- line 161, "pan.___", state 1606, "((j<1))"
- line 161, "pan.___", state 1606, "((j>=1))"
- line 167, "pan.___", state 1612, "(1)"
- line 167, "pan.___", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1613, "else"
- line 169, "pan.___", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1616, "else"
- line 201, "pan.___", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 1618, "else"
- line 220, "pan.___", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 1619, "else"
- line 355, "pan.___", state 1625, "((sighand_exec==1))"
- line 355, "pan.___", state 1625, "else"
- line 361, "pan.___", state 1628, "sighand_exec = 1"
- line 398, "pan.___", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1643, "(1)"
- line 398, "pan.___", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1644, "else"
- line 398, "pan.___", state 1647, "(1)"
- line 402, "pan.___", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1657, "(1)"
- line 402, "pan.___", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1658, "else"
- line 402, "pan.___", state 1661, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 400, "pan.___", state 1667, "((i<1))"
- line 400, "pan.___", state 1667, "((i>=1))"
- line 407, "pan.___", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1686, "(1)"
- line 408, "pan.___", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1687, "else"
- line 408, "pan.___", state 1690, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 412, "pan.___", state 1699, "(1)"
- line 412, "pan.___", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1700, "else"
- line 412, "pan.___", state 1703, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 410, "pan.___", state 1709, "((i<1))"
- line 410, "pan.___", state 1709, "((i>=1))"
- line 417, "pan.___", state 1716, "(1)"
- line 417, "pan.___", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1717, "else"
- line 417, "pan.___", state 1720, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 361, "pan.___", state 1733, "sighand_exec = 1"
- line 178, "pan.___", state 1758, "(1)"
- line 182, "pan.___", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1779, "(1)"
- line 163, "pan.___", state 1787, "(1)"
- line 167, "pan.___", state 1799, "(1)"
- line 174, "pan.___", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1842, "(1)"
- line 163, "pan.___", state 1850, "(1)"
- line 167, "pan.___", state 1862, "(1)"
- line 174, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1909, "(1)"
- line 163, "pan.___", state 1917, "(1)"
- line 167, "pan.___", state 1929, "(1)"
- line 701, "pan.___", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.85 seconds
-pan: rate 104585.88 states/second
-pan: avg transition delay 7.827e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-3:4:4356
-4:4:4356
-5:4:4359
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-7:4:4367
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-9:4:4376
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-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-depth 12: Claim reached state 9 (line 747)
-depth 28: Claim reached state 9 (line 746)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10679, errors: 0
- 38555 states, stored (92500 visited)
- 1044204 states, matched
- 1136704 transitions (= visited+matched)
- 3867169 atomic steps
-hash conflicts: 8572 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3.089 equivalent memory usage for states (stored*(State-vector + overhead))
- 2.930 actual memory usage for states (compression: 94.87%)
- state-vector as stored = 52 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 468.596 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 159, "pan.___", state 254, "(1)"
- line 163, "pan.___", state 262, "(1)"
- line 167, "pan.___", state 274, "(1)"
- line 174, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 317, "(1)"
- line 163, "pan.___", state 325, "(1)"
- line 167, "pan.___", state 337, "(1)"
- line 174, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 384, "(1)"
- line 163, "pan.___", state 392, "(1)"
- line 167, "pan.___", state 404, "(1)"
- line 398, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 441, "(1)"
- line 407, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 470, "(1)"
- line 417, "pan.___", state 500, "(1)"
- line 398, "pan.___", state 526, "(1)"
- line 402, "pan.___", state 540, "(1)"
- line 407, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 599, "(1)"
- line 402, "pan.___", state 640, "(1)"
- line 407, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 699, "(1)"
- line 174, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 722, "(1)"
- line 178, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 731, "(1)"
- line 178, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 732, "else"
- line 176, "pan.___", state 737, "((j<1))"
- line 176, "pan.___", state 737, "((j>=1))"
- line 182, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 752, "(1)"
- line 163, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 761, "else"
- line 161, "pan.___", state 766, "((j<1))"
- line 161, "pan.___", state 766, "((j>=1))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 773, "else"
- line 169, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 776, "else"
- line 174, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 785, "(1)"
- line 178, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 794, "(1)"
- line 178, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 795, "else"
- line 176, "pan.___", state 800, "((j<1))"
- line 176, "pan.___", state 800, "((j>=1))"
- line 182, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 815, "(1)"
- line 163, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 824, "else"
- line 161, "pan.___", state 829, "((j<1))"
- line 161, "pan.___", state 829, "((j>=1))"
- line 167, "pan.___", state 835, "(1)"
- line 167, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 836, "else"
- line 169, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 839, "else"
- line 201, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 841, "else"
- line 213, "pan.___", state 845, "((i<1))"
- line 213, "pan.___", state 845, "((i>=1))"
- line 174, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 852, "(1)"
- line 178, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 861, "(1)"
- line 178, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 862, "else"
- line 176, "pan.___", state 867, "((j<1))"
- line 176, "pan.___", state 867, "((j>=1))"
- line 182, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 882, "(1)"
- line 163, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 891, "else"
- line 161, "pan.___", state 896, "((j<1))"
- line 161, "pan.___", state 896, "((j>=1))"
- line 167, "pan.___", state 902, "(1)"
- line 167, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 903, "else"
- line 169, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 906, "else"
- line 201, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 908, "else"
- line 220, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 909, "else"
- line 355, "pan.___", state 915, "((sighand_exec==1))"
- line 355, "pan.___", state 915, "else"
- line 361, "pan.___", state 918, "sighand_exec = 1"
- line 398, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 933, "(1)"
- line 398, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 934, "else"
- line 398, "pan.___", state 937, "(1)"
- line 402, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 947, "(1)"
- line 402, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 948, "else"
- line 402, "pan.___", state 951, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 400, "pan.___", state 957, "((i<1))"
- line 400, "pan.___", state 957, "((i>=1))"
- line 407, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 976, "(1)"
- line 408, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 977, "else"
- line 408, "pan.___", state 980, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 412, "pan.___", state 989, "(1)"
- line 412, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 990, "else"
- line 412, "pan.___", state 993, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 410, "pan.___", state 999, "((i<1))"
- line 410, "pan.___", state 999, "((i>=1))"
- line 417, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1007, "else"
- line 417, "pan.___", state 1010, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 361, "pan.___", state 1023, "sighand_exec = 1"
- line 402, "pan.___", state 1054, "(1)"
- line 407, "pan.___", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1113, "(1)"
- line 402, "pan.___", state 1151, "(1)"
- line 407, "pan.___", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1210, "(1)"
- line 398, "pan.___", state 1236, "(1)"
- line 402, "pan.___", state 1250, "(1)"
- line 407, "pan.___", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1309, "(1)"
- line 402, "pan.___", state 1350, "(1)"
- line 407, "pan.___", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1409, "(1)"
- line 174, "pan.___", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1432, "(1)"
- line 178, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1441, "(1)"
- line 178, "pan.___", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1442, "else"
- line 176, "pan.___", state 1447, "((j<1))"
- line 176, "pan.___", state 1447, "((j>=1))"
- line 182, "pan.___", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1462, "(1)"
- line 163, "pan.___", state 1470, "(1)"
- line 163, "pan.___", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1471, "else"
- line 161, "pan.___", state 1476, "((j<1))"
- line 161, "pan.___", state 1476, "((j>=1))"
- line 167, "pan.___", state 1482, "(1)"
- line 167, "pan.___", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1483, "else"
- line 169, "pan.___", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1486, "else"
- line 174, "pan.___", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1495, "(1)"
- line 178, "pan.___", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1504, "(1)"
- line 178, "pan.___", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 1505, "else"
- line 176, "pan.___", state 1510, "((j<1))"
- line 176, "pan.___", state 1510, "((j>=1))"
- line 182, "pan.___", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1525, "(1)"
- line 163, "pan.___", state 1533, "(1)"
- line 163, "pan.___", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 1534, "else"
- line 161, "pan.___", state 1539, "((j<1))"
- line 161, "pan.___", state 1539, "((j>=1))"
- line 167, "pan.___", state 1545, "(1)"
- line 167, "pan.___", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 1546, "else"
- line 169, "pan.___", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 1549, "else"
- line 201, "pan.___", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 1551, "else"
- line 213, "pan.___", state 1555, "((i<1))"
- line 213, "pan.___", state 1555, "((i>=1))"
- line 174, "pan.___", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1562, "(1)"
- line 178, "pan.___", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1571, "(1)"
- line 178, "pan.___", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1572, "else"
- line 176, "pan.___", state 1577, "((j<1))"
- line 176, "pan.___", state 1577, "((j>=1))"
- line 182, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1592, "(1)"
- line 163, "pan.___", state 1600, "(1)"
- line 163, "pan.___", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1601, "else"
- line 161, "pan.___", state 1606, "((j<1))"
- line 161, "pan.___", state 1606, "((j>=1))"
- line 167, "pan.___", state 1612, "(1)"
- line 167, "pan.___", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1613, "else"
- line 169, "pan.___", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1616, "else"
- line 201, "pan.___", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 1618, "else"
- line 220, "pan.___", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 1619, "else"
- line 355, "pan.___", state 1625, "((sighand_exec==1))"
- line 355, "pan.___", state 1625, "else"
- line 361, "pan.___", state 1628, "sighand_exec = 1"
- line 398, "pan.___", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1643, "(1)"
- line 398, "pan.___", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1644, "else"
- line 398, "pan.___", state 1647, "(1)"
- line 402, "pan.___", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1657, "(1)"
- line 402, "pan.___", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1658, "else"
- line 402, "pan.___", state 1661, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 400, "pan.___", state 1667, "((i<1))"
- line 400, "pan.___", state 1667, "((i>=1))"
- line 407, "pan.___", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1686, "(1)"
- line 408, "pan.___", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1687, "else"
- line 408, "pan.___", state 1690, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 412, "pan.___", state 1699, "(1)"
- line 412, "pan.___", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1700, "else"
- line 412, "pan.___", state 1703, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 410, "pan.___", state 1709, "((i<1))"
- line 410, "pan.___", state 1709, "((i>=1))"
- line 417, "pan.___", state 1716, "(1)"
- line 417, "pan.___", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1717, "else"
- line 417, "pan.___", state 1720, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 361, "pan.___", state 1733, "sighand_exec = 1"
- line 178, "pan.___", state 1758, "(1)"
- line 182, "pan.___", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1779, "(1)"
- line 163, "pan.___", state 1787, "(1)"
- line 167, "pan.___", state 1799, "(1)"
- line 174, "pan.___", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1842, "(1)"
- line 163, "pan.___", state 1850, "(1)"
- line 167, "pan.___", state 1862, "(1)"
- line 174, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1909, "(1)"
- line 163, "pan.___", state 1917, "(1)"
- line 167, "pan.___", state 1929, "(1)"
- line 701, "pan.___", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.89 seconds
-pan: rate 103932.58 states/second
-pan: avg transition delay 7.8297e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-depth 12: Claim reached state 9 (line 748)
-depth 28: Claim reached state 9 (line 747)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10679, errors: 0
- 38555 states, stored (92500 visited)
- 1044204 states, matched
- 1136704 transitions (= visited+matched)
- 3867169 atomic steps
-hash conflicts: 6390 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3.089 equivalent memory usage for states (stored*(State-vector + overhead))
- 2.767 actual memory usage for states (compression: 89.58%)
- state-vector as stored = 47 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 468.498 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 403, "pan.___", state 330, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 59, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 160, "(1)"
- line 652, "pan.___", state 213, "(1)"
- line 175, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 179, "pan.___", state 233, "(1)"
- line 160, "pan.___", state 254, "(1)"
- line 164, "pan.___", state 262, "(1)"
- line 168, "pan.___", state 274, "(1)"
- line 175, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 179, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 183, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 317, "(1)"
- line 164, "pan.___", state 325, "(1)"
- line 168, "pan.___", state 337, "(1)"
- line 175, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 179, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 183, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 160, "pan.___", state 384, "(1)"
- line 164, "pan.___", state 392, "(1)"
- line 168, "pan.___", state 404, "(1)"
- line 399, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 403, "pan.___", state 441, "(1)"
- line 408, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 500, "(1)"
- line 399, "pan.___", state 526, "(1)"
- line 403, "pan.___", state 540, "(1)"
- line 408, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 599, "(1)"
- line 403, "pan.___", state 640, "(1)"
- line 408, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 699, "(1)"
- line 399, "pan.___", state 721, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 723, "(1)"
- line 399, "pan.___", state 724, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 724, "else"
- line 399, "pan.___", state 727, "(1)"
- line 403, "pan.___", state 735, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 737, "(1)"
- line 403, "pan.___", state 738, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 738, "else"
- line 403, "pan.___", state 741, "(1)"
- line 403, "pan.___", state 742, "(1)"
- line 403, "pan.___", state 742, "(1)"
- line 401, "pan.___", state 747, "((i<1))"
- line 401, "pan.___", state 747, "((i>=1))"
- line 408, "pan.___", state 753, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 766, "(1)"
- line 409, "pan.___", state 767, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 767, "else"
- line 409, "pan.___", state 770, "(1)"
- line 409, "pan.___", state 771, "(1)"
- line 409, "pan.___", state 771, "(1)"
- line 413, "pan.___", state 779, "(1)"
- line 413, "pan.___", state 780, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 780, "else"
- line 413, "pan.___", state 783, "(1)"
- line 413, "pan.___", state 784, "(1)"
- line 413, "pan.___", state 784, "(1)"
- line 411, "pan.___", state 789, "((i<1))"
- line 411, "pan.___", state 789, "((i>=1))"
- line 418, "pan.___", state 796, "(1)"
- line 418, "pan.___", state 797, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 797, "else"
- line 418, "pan.___", state 800, "(1)"
- line 418, "pan.___", state 801, "(1)"
- line 418, "pan.___", state 801, "(1)"
- line 420, "pan.___", state 804, "(1)"
- line 420, "pan.___", state 804, "(1)"
- line 356, "pan.___", state 810, "((sighand_exec==1))"
- line 356, "pan.___", state 810, "else"
- line 362, "pan.___", state 813, "sighand_exec = 1"
- line 399, "pan.___", state 826, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 828, "(1)"
- line 399, "pan.___", state 829, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 829, "else"
- line 399, "pan.___", state 832, "(1)"
- line 403, "pan.___", state 840, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 842, "(1)"
- line 403, "pan.___", state 843, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 843, "else"
- line 403, "pan.___", state 846, "(1)"
- line 403, "pan.___", state 847, "(1)"
- line 403, "pan.___", state 847, "(1)"
- line 401, "pan.___", state 852, "((i<1))"
- line 401, "pan.___", state 852, "((i>=1))"
- line 408, "pan.___", state 858, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 871, "(1)"
- line 409, "pan.___", state 872, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 872, "else"
- line 409, "pan.___", state 875, "(1)"
- line 409, "pan.___", state 876, "(1)"
- line 409, "pan.___", state 876, "(1)"
- line 413, "pan.___", state 884, "(1)"
- line 413, "pan.___", state 885, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 885, "else"
- line 413, "pan.___", state 888, "(1)"
- line 413, "pan.___", state 889, "(1)"
- line 413, "pan.___", state 889, "(1)"
- line 411, "pan.___", state 894, "((i<1))"
- line 411, "pan.___", state 894, "((i>=1))"
- line 418, "pan.___", state 901, "(1)"
- line 418, "pan.___", state 902, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 902, "else"
- line 418, "pan.___", state 905, "(1)"
- line 418, "pan.___", state 906, "(1)"
- line 418, "pan.___", state 906, "(1)"
- line 420, "pan.___", state 909, "(1)"
- line 420, "pan.___", state 909, "(1)"
- line 362, "pan.___", state 918, "sighand_exec = 1"
- line 403, "pan.___", state 949, "(1)"
- line 408, "pan.___", state 965, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1008, "(1)"
- line 403, "pan.___", state 1046, "(1)"
- line 408, "pan.___", state 1062, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1105, "(1)"
- line 399, "pan.___", state 1131, "(1)"
- line 403, "pan.___", state 1145, "(1)"
- line 408, "pan.___", state 1161, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1204, "(1)"
- line 403, "pan.___", state 1245, "(1)"
- line 408, "pan.___", state 1261, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1304, "(1)"
- line 399, "pan.___", state 1326, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1328, "(1)"
- line 399, "pan.___", state 1329, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1329, "else"
- line 399, "pan.___", state 1332, "(1)"
- line 403, "pan.___", state 1340, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1342, "(1)"
- line 403, "pan.___", state 1343, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1343, "else"
- line 403, "pan.___", state 1346, "(1)"
- line 403, "pan.___", state 1347, "(1)"
- line 403, "pan.___", state 1347, "(1)"
- line 401, "pan.___", state 1352, "((i<1))"
- line 401, "pan.___", state 1352, "((i>=1))"
- line 408, "pan.___", state 1358, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1371, "(1)"
- line 409, "pan.___", state 1372, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1372, "else"
- line 409, "pan.___", state 1375, "(1)"
- line 409, "pan.___", state 1376, "(1)"
- line 409, "pan.___", state 1376, "(1)"
- line 413, "pan.___", state 1384, "(1)"
- line 413, "pan.___", state 1385, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1385, "else"
- line 413, "pan.___", state 1388, "(1)"
- line 413, "pan.___", state 1389, "(1)"
- line 413, "pan.___", state 1389, "(1)"
- line 411, "pan.___", state 1394, "((i<1))"
- line 411, "pan.___", state 1394, "((i>=1))"
- line 418, "pan.___", state 1401, "(1)"
- line 418, "pan.___", state 1402, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1402, "else"
- line 418, "pan.___", state 1405, "(1)"
- line 418, "pan.___", state 1406, "(1)"
- line 418, "pan.___", state 1406, "(1)"
- line 420, "pan.___", state 1409, "(1)"
- line 420, "pan.___", state 1409, "(1)"
- line 356, "pan.___", state 1415, "((sighand_exec==1))"
- line 356, "pan.___", state 1415, "else"
- line 362, "pan.___", state 1418, "sighand_exec = 1"
- line 399, "pan.___", state 1431, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1433, "(1)"
- line 399, "pan.___", state 1434, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1434, "else"
- line 399, "pan.___", state 1437, "(1)"
- line 403, "pan.___", state 1445, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1447, "(1)"
- line 403, "pan.___", state 1448, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1448, "else"
- line 403, "pan.___", state 1451, "(1)"
- line 403, "pan.___", state 1452, "(1)"
- line 403, "pan.___", state 1452, "(1)"
- line 401, "pan.___", state 1457, "((i<1))"
- line 401, "pan.___", state 1457, "((i>=1))"
- line 408, "pan.___", state 1463, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1476, "(1)"
- line 409, "pan.___", state 1477, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1477, "else"
- line 409, "pan.___", state 1480, "(1)"
- line 409, "pan.___", state 1481, "(1)"
- line 409, "pan.___", state 1481, "(1)"
- line 413, "pan.___", state 1489, "(1)"
- line 413, "pan.___", state 1490, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1490, "else"
- line 413, "pan.___", state 1493, "(1)"
- line 413, "pan.___", state 1494, "(1)"
- line 413, "pan.___", state 1494, "(1)"
- line 411, "pan.___", state 1499, "((i<1))"
- line 411, "pan.___", state 1499, "((i>=1))"
- line 418, "pan.___", state 1506, "(1)"
- line 418, "pan.___", state 1507, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1507, "else"
- line 418, "pan.___", state 1510, "(1)"
- line 418, "pan.___", state 1511, "(1)"
- line 418, "pan.___", state 1511, "(1)"
- line 420, "pan.___", state 1514, "(1)"
- line 420, "pan.___", state 1514, "(1)"
- line 362, "pan.___", state 1523, "sighand_exec = 1"
- line 179, "pan.___", state 1548, "(1)"
- line 183, "pan.___", state 1559, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 160, "pan.___", state 1569, "(1)"
- line 164, "pan.___", state 1577, "(1)"
- line 168, "pan.___", state 1589, "(1)"
- line 175, "pan.___", state 1600, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 179, "pan.___", state 1609, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1622, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1632, "(1)"
- line 164, "pan.___", state 1640, "(1)"
- line 168, "pan.___", state 1652, "(1)"
- line 175, "pan.___", state 1667, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 179, "pan.___", state 1676, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 183, "pan.___", state 1689, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 160, "pan.___", state 1699, "(1)"
- line 164, "pan.___", state 1707, "(1)"
- line 168, "pan.___", state 1719, "(1)"
- line 702, "pan.___", state 1758, "-end-"
- (173 of 1758 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.89 seconds
-pan: rate 103932.58 states/second
-pan: avg transition delay 7.8297e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-39:2:1203
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-239:1:128
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-3864:1:141
-3865:1:145
-3866:1:146
-3867:1:153
-3868:1:154
-3869:1:165
-3870:1:166
-3871:1:167
-3872:1:178
-3873:1:183
-3874:1:184
-3875:0:2969
-3876:1:196
-3877:0:2969
-3878:2:2564
-3879:0:2969
-3880:2:2565
-3881:0:2969
-3882:1:197
-3883:0:2969
-3884:2:2564
-3885:0:2969
-3886:2:2565
-3887:0:2969
-3888:1:198
-3889:1:202
-3890:1:203
-3891:1:211
-3892:1:212
-3893:1:216
-3894:1:217
-3895:1:225
-3896:1:230
-3897:1:234
-3898:1:235
-3899:1:242
-3900:1:243
-3901:1:254
-3902:1:255
-3903:1:256
-3904:1:267
-3905:1:272
-3906:1:273
-3907:0:2969
-3908:2:2564
-3909:0:2969
-3910:2:2565
-3911:0:2969
-3912:1:285
-3913:0:2969
-3914:1:486
-3915:0:2969
-3916:1:487
-3917:0:2969
-3918:1:20
-3919:0:2969
-3920:2:2564
-3921:0:2969
-3922:2:2565
-3923:0:2969
-3924:1:21
-3925:1:25
-3926:1:26
-3927:1:34
-3928:1:35
-3929:1:36
-3930:1:48
-3931:1:53
-3932:1:57
-3933:1:58
-3934:1:65
-3935:1:66
-3936:1:77
-3937:1:78
-3938:1:79
-3939:1:90
-3940:1:95
-3941:1:96
-3942:0:2969
-3943:2:2564
-3944:0:2969
-3945:2:2565
-3946:0:2969
-3947:1:108
-3948:0:2969
-3949:2:2564
-3950:0:2969
-3951:2:2565
-3952:0:2969
-3953:1:109
-3954:1:113
-3955:1:114
-3956:1:122
-3957:1:123
-3958:1:127
-3959:1:128
-3960:1:136
-3961:1:141
-3962:1:145
-3963:1:146
-3964:1:153
-3965:1:154
-3966:1:165
-3967:1:166
-3968:1:167
-3969:1:178
-3970:1:183
-3971:1:184
-3972:0:2969
-3973:1:288
-3974:0:2969
-3975:2:2564
-3976:0:2969
-3977:2:2565
-3978:0:2969
-3979:1:289
-3980:0:2969
-3981:1:486
-3982:0:2969
-3983:1:487
-3984:0:2969
-3985:1:492
-3986:0:2969
-3987:2:2564
-3988:0:2969
-3989:2:2565
-3990:0:2969
-3991:1:497
-3992:1:501
-3993:1:502
-3994:1:510
-3995:1:511
-3996:1:512
-3997:1:524
-3998:1:529
-3999:1:533
-4000:1:534
-4001:1:541
-4002:1:542
-4003:1:553
-4004:1:554
-4005:1:555
-4006:1:566
-4007:1:571
-4008:1:572
-4009:0:2969
-4010:2:2564
-4011:0:2969
-4012:2:2565
-4013:0:2969
-4014:1:584
-4015:0:2969
-4016:2:2564
-4017:0:2969
-4018:2:2565
-4019:0:2969
-4020:1:585
-4021:1:589
-4022:1:590
-4023:1:598
-4024:1:599
-4025:1:603
-4026:1:604
-4027:1:612
-4028:1:617
-4029:1:621
-4030:1:622
-4031:1:629
-4032:1:630
-4033:1:641
-4034:1:642
-4035:1:643
-4036:1:654
-4037:1:659
-4038:1:660
-4039:0:2969
-4040:2:2564
-4041:0:2969
-4042:2:2565
-4043:0:2969
-4044:1:672
-4045:0:2969
-4046:2:2564
-4047:0:2969
-4048:2:2565
-4049:0:2969
-4050:1:673
-4051:1:677
-4052:1:678
-4053:1:686
-4054:1:687
-4055:1:691
-4056:1:692
-4057:1:700
-4058:1:705
-4059:1:709
-4060:1:710
-4061:1:717
-4062:1:718
-4063:1:729
-4064:1:730
-4065:1:731
-4066:1:742
-4067:1:747
-4068:1:748
-4069:0:2969
-4070:2:2564
-4071:0:2969
-4072:2:2565
-4073:0:2969
-4074:1:760
-4075:0:2969
-4076:1:761
-4077:0:2969
-4078:1:762
-4079:0:2969
-4080:1:955
-4081:0:2969
-4082:1:956
-4083:0:2969
-4084:2:2564
-4085:0:2969
-4086:2:2565
-4087:0:2969
-4088:1:960
-4089:0:2969
-4090:2:2564
-4091:0:2969
-4092:2:2565
-4093:0:2969
-4094:1:961
-4095:1:965
-4096:1:966
-4097:1:974
-4098:1:975
-4099:1:979
-4100:1:980
-4101:1:988
-4102:1:993
-4103:1:997
-4104:1:998
-4105:1:1005
-4106:1:1006
-4107:1:1017
-4108:1:1018
-4109:1:1019
-4110:1:1030
-4111:1:1035
-4112:1:1036
-4113:0:2969
-4114:2:2564
-4115:0:2969
-4116:2:2565
-4117:0:2969
-4118:1:1048
-4119:0:2969
-4120:1:762
-4121:0:2969
-4122:1:955
-4123:0:2969
-4124:1:956
-4125:0:2969
-4126:2:2564
-4127:0:2969
-4128:2:2565
-4129:0:2969
-4130:1:960
-4131:0:2969
-4132:2:2564
-4133:0:2969
-4134:2:2565
-4135:0:2969
-4136:1:961
-4137:1:965
-4138:1:966
-4139:1:974
-4140:1:975
-4141:1:976
-4142:1:988
-4143:1:993
-4144:1:997
-4145:1:998
-4146:1:1005
-4147:1:1006
-4148:1:1017
-4149:1:1018
-4150:1:1019
-4151:1:1030
-4152:1:1035
-4153:1:1036
-4154:0:2969
-4155:2:2564
-4156:0:2969
-4157:2:2565
-4158:0:2969
-4159:1:1048
-4160:0:2969
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-4162:0:2969
-4163:2:2564
-4164:0:2969
-4165:2:2565
-4166:0:2969
-4167:1:1057
-4168:1:1061
-4169:1:1062
-4170:1:1070
-4171:1:1071
-4172:1:1072
-4173:1:1084
-4174:1:1089
-4175:1:1093
-4176:1:1094
-4177:1:1101
-4178:1:1102
-4179:1:1113
-4180:1:1114
-4181:1:1115
-4182:1:1126
-4183:1:1131
-4184:1:1132
-4185:0:2969
-4186:1:9
-4187:0:2969
-4188:2:2564
-4189:0:2969
-4190:2:2565
-4191:0:2969
-4192:1:10
-4193:0:2969
-4194:2:2566
-4195:0:2969
-4196:1:11
-4197:0:2969
-4198:2:2377
-4199:0:2969
-4200:1:12
-4201:0:2969
-4202:2:2378
-4203:0:2969
-4204:2:2379
-4205:2:2383
-4206:2:2384
-4207:2:2392
-4208:2:2393
-4209:2:2397
-4210:2:2398
-4211:2:2406
-4212:2:2411
-4213:2:2415
-4214:2:2416
-4215:2:2423
-4216:2:2424
-4217:2:2435
-4218:2:2443
-4219:2:2444
-4220:2:2448
-4221:2:2453
-4222:2:2454
-4223:0:2969
-4224:2:2466
-4225:0:2969
-4226:2:2467
-4227:0:2969
-4228:1:13
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 3212 States= 1e+06 Transitions= 1.17e+07 Memory= 519.572 t= 7.66 R= 1e+05
-Depth= 3212 States= 2e+06 Transitions= 2.38e+07 Memory= 572.990 t= 16 R= 1e+05
-Depth= 3212 States= 3e+06 Transitions= 3.62e+07 Memory= 626.408 t= 24.9 R= 1e+05
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 48 byte, depth reached 3212, errors: 0
- 3539988 states, stored
- 39085459 states, matched
- 42625447 transitions (= stored+matched)
-1.5602888e+08 atomic steps
-hash conflicts: 28971442 (resolved)
-
-Stats on memory usage (in Megabytes):
- 256.576 equivalent memory usage for states (stored*(State-vector + overhead))
- 196.718 actual memory usage for states (compression: 76.67%)
- state-vector as stored = 30 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 686.338 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, ".input.spin", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 61, "(1)"
- line 417, ".input.spin", state 91, "(1)"
- line 398, ".input.spin", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 151, "(1)"
- line 417, ".input.spin", state 181, "(1)"
- line 398, ".input.spin", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 242, "(1)"
- line 417, ".input.spin", state 272, "(1)"
- line 398, ".input.spin", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 360, "(1)"
- line 417, ".input.spin", state 390, "(1)"
- line 539, ".input.spin", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 398, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 59, "(1)"
- line 412, ".input.spin", state 72, "(1)"
- line 417, ".input.spin", state 89, "(1)"
- line 398, ".input.spin", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 153, "(1)"
- line 412, ".input.spin", state 166, "(1)"
- line 651, ".input.spin", state 199, "(1)"
- line 174, ".input.spin", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 240, "(1)"
- line 163, ".input.spin", state 248, "(1)"
- line 167, ".input.spin", state 260, "(1)"
- line 174, ".input.spin", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 303, "(1)"
- line 163, ".input.spin", state 311, "(1)"
- line 167, ".input.spin", state 323, "(1)"
- line 174, ".input.spin", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 370, "(1)"
- line 163, ".input.spin", state 378, "(1)"
- line 167, ".input.spin", state 390, "(1)"
- line 398, ".input.spin", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 449, "(1)"
- line 412, ".input.spin", state 462, "(1)"
- line 417, ".input.spin", state 479, "(1)"
- line 398, ".input.spin", state 498, "(1)"
- line 402, ".input.spin", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 554, "(1)"
- line 417, ".input.spin", state 571, "(1)"
- line 402, ".input.spin", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 647, "(1)"
- line 417, ".input.spin", state 664, "(1)"
- line 178, ".input.spin", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 710, "(1)"
- line 163, ".input.spin", state 718, "(1)"
- line 167, ".input.spin", state 730, "(1)"
- line 174, ".input.spin", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 773, "(1)"
- line 163, ".input.spin", state 781, "(1)"
- line 167, ".input.spin", state 793, "(1)"
- line 174, ".input.spin", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 840, "(1)"
- line 163, ".input.spin", state 848, "(1)"
- line 167, ".input.spin", state 860, "(1)"
- line 398, ".input.spin", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, ".input.spin", state 884, "(1)"
- line 398, ".input.spin", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, ".input.spin", state 885, "else"
- line 398, ".input.spin", state 888, "(1)"
- line 402, ".input.spin", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 898, "(1)"
- line 402, ".input.spin", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, ".input.spin", state 899, "else"
- line 402, ".input.spin", state 902, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 400, ".input.spin", state 908, "((i<1))"
- line 400, ".input.spin", state 908, "((i>=1))"
- line 407, ".input.spin", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 927, "(1)"
- line 408, ".input.spin", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, ".input.spin", state 928, "else"
- line 408, ".input.spin", state 931, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 412, ".input.spin", state 940, "(1)"
- line 412, ".input.spin", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, ".input.spin", state 941, "else"
- line 412, ".input.spin", state 944, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 410, ".input.spin", state 950, "((i<1))"
- line 410, ".input.spin", state 950, "((i>=1))"
- line 417, ".input.spin", state 957, "(1)"
- line 417, ".input.spin", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, ".input.spin", state 958, "else"
- line 417, ".input.spin", state 961, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 402, ".input.spin", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1040, "(1)"
- line 417, ".input.spin", state 1057, "(1)"
- line 402, ".input.spin", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1130, "(1)"
- line 417, ".input.spin", state 1147, "(1)"
- line 398, ".input.spin", state 1166, "(1)"
- line 402, ".input.spin", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1222, "(1)"
- line 417, ".input.spin", state 1239, "(1)"
- line 402, ".input.spin", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1315, "(1)"
- line 417, ".input.spin", state 1332, "(1)"
- line 178, ".input.spin", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1378, "(1)"
- line 163, ".input.spin", state 1386, "(1)"
- line 167, ".input.spin", state 1398, "(1)"
- line 174, ".input.spin", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1441, "(1)"
- line 163, ".input.spin", state 1449, "(1)"
- line 167, ".input.spin", state 1461, "(1)"
- line 174, ".input.spin", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1508, "(1)"
- line 163, ".input.spin", state 1516, "(1)"
- line 167, ".input.spin", state 1528, "(1)"
- line 398, ".input.spin", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, ".input.spin", state 1552, "(1)"
- line 398, ".input.spin", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, ".input.spin", state 1553, "else"
- line 398, ".input.spin", state 1556, "(1)"
- line 402, ".input.spin", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 1566, "(1)"
- line 402, ".input.spin", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, ".input.spin", state 1567, "else"
- line 402, ".input.spin", state 1570, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 400, ".input.spin", state 1576, "((i<1))"
- line 400, ".input.spin", state 1576, "((i>=1))"
- line 407, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 1595, "(1)"
- line 408, ".input.spin", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, ".input.spin", state 1596, "else"
- line 408, ".input.spin", state 1599, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 412, ".input.spin", state 1608, "(1)"
- line 412, ".input.spin", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, ".input.spin", state 1609, "else"
- line 412, ".input.spin", state 1612, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 410, ".input.spin", state 1618, "((i<1))"
- line 410, ".input.spin", state 1618, "((i>=1))"
- line 417, ".input.spin", state 1625, "(1)"
- line 417, ".input.spin", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, ".input.spin", state 1626, "else"
- line 417, ".input.spin", state 1629, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 178, ".input.spin", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1681, "(1)"
- line 163, ".input.spin", state 1689, "(1)"
- line 167, ".input.spin", state 1701, "(1)"
- line 174, ".input.spin", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1744, "(1)"
- line 163, ".input.spin", state 1752, "(1)"
- line 167, ".input.spin", state 1764, "(1)"
- line 174, ".input.spin", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1811, "(1)"
- line 163, ".input.spin", state 1819, "(1)"
- line 167, ".input.spin", state 1831, "(1)"
- line 701, ".input.spin", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 29.8 seconds
-pan: rate 118871.32 states/second
-pan: avg transition delay 6.9864e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-Depth= 3880 States= 1e+06 Transitions= 1.18e+07 Memory= 527.190 t= 9.53 R= 1e+05
-Depth= 3880 States= 2e+06 Transitions= 2.39e+07 Memory= 588.225 t= 19.8 R= 1e+05
-Depth= 3880 States= 3e+06 Transitions= 3.61e+07 Memory= 649.260 t= 30.5 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 3880 States= 4e+06 Transitions= 4.84e+07 Memory= 741.318 t= 41.1 R= 1e+05
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3880, errors: 0
- 4015564 states, stored
- 44539121 states, matched
- 48554685 transitions (= stored+matched)
-1.7777933e+08 atomic steps
-hash conflicts: 33629695 (resolved)
-
-Stats on memory usage (in Megabytes):
- 321.681 equivalent memory usage for states (stored*(State-vector + overhead))
- 252.629 actual memory usage for states (compression: 78.53%)
- state-vector as stored = 38 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 742.295 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 61, "(1)"
- line 417, "pan.___", state 91, "(1)"
- line 398, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 151, "(1)"
- line 417, "pan.___", state 181, "(1)"
- line 398, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 242, "(1)"
- line 417, "pan.___", state 272, "(1)"
- line 398, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 360, "(1)"
- line 417, "pan.___", state 390, "(1)"
- line 539, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 59, "(1)"
- line 412, "pan.___", state 72, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 153, "(1)"
- line 412, "pan.___", state 166, "(1)"
- line 651, "pan.___", state 199, "(1)"
- line 174, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 240, "(1)"
- line 163, "pan.___", state 248, "(1)"
- line 167, "pan.___", state 260, "(1)"
- line 174, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 303, "(1)"
- line 163, "pan.___", state 311, "(1)"
- line 167, "pan.___", state 323, "(1)"
- line 174, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 370, "(1)"
- line 163, "pan.___", state 378, "(1)"
- line 167, "pan.___", state 390, "(1)"
- line 398, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 449, "(1)"
- line 412, "pan.___", state 462, "(1)"
- line 417, "pan.___", state 479, "(1)"
- line 398, "pan.___", state 498, "(1)"
- line 402, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 554, "(1)"
- line 417, "pan.___", state 571, "(1)"
- line 402, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 647, "(1)"
- line 417, "pan.___", state 664, "(1)"
- line 178, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 710, "(1)"
- line 163, "pan.___", state 718, "(1)"
- line 167, "pan.___", state 730, "(1)"
- line 174, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 773, "(1)"
- line 163, "pan.___", state 781, "(1)"
- line 167, "pan.___", state 793, "(1)"
- line 174, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 840, "(1)"
- line 163, "pan.___", state 848, "(1)"
- line 167, "pan.___", state 860, "(1)"
- line 398, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, "pan.___", state 884, "(1)"
- line 398, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, "pan.___", state 885, "else"
- line 398, "pan.___", state 888, "(1)"
- line 402, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, "pan.___", state 899, "else"
- line 402, "pan.___", state 902, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 400, "pan.___", state 908, "((i<1))"
- line 400, "pan.___", state 908, "((i>=1))"
- line 407, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 927, "(1)"
- line 408, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, "pan.___", state 928, "else"
- line 408, "pan.___", state 931, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 412, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, "pan.___", state 941, "else"
- line 412, "pan.___", state 944, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 410, "pan.___", state 950, "((i<1))"
- line 410, "pan.___", state 950, "((i>=1))"
- line 417, "pan.___", state 957, "(1)"
- line 417, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, "pan.___", state 958, "else"
- line 417, "pan.___", state 961, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 402, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1040, "(1)"
- line 417, "pan.___", state 1057, "(1)"
- line 402, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1130, "(1)"
- line 417, "pan.___", state 1147, "(1)"
- line 398, "pan.___", state 1166, "(1)"
- line 402, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1222, "(1)"
- line 417, "pan.___", state 1239, "(1)"
- line 402, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1315, "(1)"
- line 417, "pan.___", state 1332, "(1)"
- line 178, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1378, "(1)"
- line 163, "pan.___", state 1386, "(1)"
- line 167, "pan.___", state 1398, "(1)"
- line 174, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1441, "(1)"
- line 163, "pan.___", state 1449, "(1)"
- line 167, "pan.___", state 1461, "(1)"
- line 174, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1508, "(1)"
- line 163, "pan.___", state 1516, "(1)"
- line 167, "pan.___", state 1528, "(1)"
- line 398, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, "pan.___", state 1552, "(1)"
- line 398, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, "pan.___", state 1553, "else"
- line 398, "pan.___", state 1556, "(1)"
- line 402, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 1566, "(1)"
- line 402, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, "pan.___", state 1567, "else"
- line 402, "pan.___", state 1570, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 400, "pan.___", state 1576, "((i<1))"
- line 400, "pan.___", state 1576, "((i>=1))"
- line 407, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1595, "(1)"
- line 408, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, "pan.___", state 1596, "else"
- line 408, "pan.___", state 1599, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 412, "pan.___", state 1608, "(1)"
- line 412, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, "pan.___", state 1609, "else"
- line 412, "pan.___", state 1612, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 410, "pan.___", state 1618, "((i<1))"
- line 410, "pan.___", state 1618, "((i>=1))"
- line 417, "pan.___", state 1625, "(1)"
- line 417, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, "pan.___", state 1626, "else"
- line 417, "pan.___", state 1629, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 178, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1681, "(1)"
- line 163, "pan.___", state 1689, "(1)"
- line 167, "pan.___", state 1701, "(1)"
- line 174, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1744, "(1)"
- line 163, "pan.___", state 1752, "(1)"
- line 167, "pan.___", state 1764, "(1)"
- line 174, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1811, "(1)"
- line 163, "pan.___", state 1819, "(1)"
- line 167, "pan.___", state 1831, "(1)"
- line 701, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 41.3 seconds
-pan: rate 97205.616 states/second
-pan: avg transition delay 8.5079e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-14821:2:1315
-14822:2:1316
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-14833:2:1358
-14834:0:4365
-14835:2:1360
-14836:0:4365
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-14838:0:4365
-14839:2:1361
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-14841:3:2428
-14842:0:4365
-14843:2:1362
-14844:2:1366
-14845:2:1367
-14846:2:1375
-14847:2:1376
-14848:2:1380
-14849:2:1381
-14850:2:1375
-14851:2:1376
-14852:2:1380
-14853:2:1381
-14854:2:1389
-14855:2:1394
-14856:2:1398
-14857:2:1399
-14858:2:1406
-14859:2:1407
-14860:2:1418
-14861:2:1419
-14862:2:1420
-14863:2:1418
-14864:2:1419
-14865:2:1420
-14866:2:1431
-14867:2:1436
-14868:2:1437
-14869:0:4365
-14870:2:1449
-14871:0:4365
-14872:3:2427
-14873:0:4365
-14874:2:1451
-14875:0:4365
-14876:3:2428
-14877:0:4365
-14878:2:1652
-14879:0:4365
-14880:2:1653
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-14883:0:4365
-14884:2:1180
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-14888:2:1181
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-14890:2:1186
-14891:2:1194
-14892:2:1195
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-14894:2:1200
-14895:2:1194
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+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_nested.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-Depth= 3880 States= 1e+06 Transitions= 1.18e+07 Memory= 527.190 t= 9.48 R= 1e+05
-Depth= 3880 States= 2e+06 Transitions= 2.39e+07 Memory= 588.225 t= 19.6 R= 1e+05
-Depth= 3880 States= 3e+06 Transitions= 3.61e+07 Memory= 649.260 t= 30.3 R= 1e+05
+++ /dev/null
-#define READER_NEST_LEVEL 1
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-#define get_pid() ((_pid < 1) -> 0 : 1)
-#elif defined(TEST_SIGNAL_ON_READ)
-#define get_pid() ((_pid < 2) -> 0 : 1)
-#else
-#define get_pid() (_pid)
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- dispatch_sighand_read_exec();
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-Depth= 11386 States= 1e+06 Transitions= 1.56e+07 Memory= 527.287 t= 12.8 R= 8e+04
-pan: claim violated! (at depth 2146)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 72 byte, depth reached 11386, errors: 1
- 1223588 states, stored
- 17987399 states, matched
- 19210987 transitions (= stored+matched)
- 70012127 atomic steps
-hash conflicts: 4173157 (resolved)
-
-Stats on memory usage (in Megabytes):
- 116.690 equivalent memory usage for states (stored*(State-vector + overhead))
- 75.177 actual memory usage for states (compression: 64.42%)
- state-vector as stored = 36 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 540.861 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 151, "(1)"
- line 419, "pan.___", state 181, "(1)"
- line 400, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 242, "(1)"
- line 419, "pan.___", state 272, "(1)"
- line 400, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 331, "(1)"
- line 409, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 360, "(1)"
- line 419, "pan.___", state 390, "(1)"
- line 541, "pan.___", state 414, "-end-"
- (18 of 414 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 410, "pan.___", state 153, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 400, "pan.___", state 209, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 223, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 254, "(1)"
- line 414, "pan.___", state 267, "(1)"
- line 400, "pan.___", state 300, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 314, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 345, "(1)"
- line 414, "pan.___", state 358, "(1)"
- line 400, "pan.___", state 395, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 409, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 440, "(1)"
- line 414, "pan.___", state 453, "(1)"
- line 400, "pan.___", state 488, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 533, "(1)"
- line 414, "pan.___", state 546, "(1)"
- line 400, "pan.___", state 582, "(1)"
- line 404, "pan.___", state 594, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 638, "(1)"
- line 404, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 731, "(1)"
- line 404, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 821, "(1)"
- line 419, "pan.___", state 838, "(1)"
- line 404, "pan.___", state 868, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 886, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 912, "(1)"
- line 419, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 963, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 981, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1007, "(1)"
- line 419, "pan.___", state 1024, "(1)"
- line 400, "pan.___", state 1050, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1053, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1053, "else"
- line 400, "pan.___", state 1056, "(1)"
- line 404, "pan.___", state 1064, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1066, "(1)"
- line 404, "pan.___", state 1067, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1067, "else"
- line 404, "pan.___", state 1070, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 402, "pan.___", state 1076, "((i<1))"
- line 402, "pan.___", state 1076, "((i>=1))"
- line 409, "pan.___", state 1082, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1095, "(1)"
- line 410, "pan.___", state 1096, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1096, "else"
- line 410, "pan.___", state 1099, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 414, "pan.___", state 1108, "(1)"
- line 414, "pan.___", state 1109, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1109, "else"
- line 414, "pan.___", state 1112, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 412, "pan.___", state 1118, "((i<1))"
- line 412, "pan.___", state 1118, "((i>=1))"
- line 419, "pan.___", state 1125, "(1)"
- line 419, "pan.___", state 1126, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1126, "else"
- line 419, "pan.___", state 1129, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 404, "pan.___", state 1164, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1208, "(1)"
- line 404, "pan.___", state 1254, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1298, "(1)"
- line 400, "pan.___", state 1334, "(1)"
- line 404, "pan.___", state 1346, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1390, "(1)"
- line 404, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1483, "(1)"
- line 404, "pan.___", state 1529, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1547, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1573, "(1)"
- line 419, "pan.___", state 1590, "(1)"
- line 404, "pan.___", state 1620, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1638, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1664, "(1)"
- line 419, "pan.___", state 1681, "(1)"
- line 404, "pan.___", state 1715, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1733, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1759, "(1)"
- line 419, "pan.___", state 1776, "(1)"
- line 400, "pan.___", state 1802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1804, "(1)"
- line 400, "pan.___", state 1805, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1805, "else"
- line 400, "pan.___", state 1808, "(1)"
- line 404, "pan.___", state 1816, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1818, "(1)"
- line 404, "pan.___", state 1819, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1819, "else"
- line 404, "pan.___", state 1822, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 402, "pan.___", state 1828, "((i<1))"
- line 402, "pan.___", state 1828, "((i>=1))"
- line 409, "pan.___", state 1834, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1847, "(1)"
- line 410, "pan.___", state 1848, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1848, "else"
- line 410, "pan.___", state 1851, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 414, "pan.___", state 1860, "(1)"
- line 414, "pan.___", state 1861, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1861, "else"
- line 414, "pan.___", state 1864, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 412, "pan.___", state 1870, "((i<1))"
- line 412, "pan.___", state 1870, "((i>=1))"
- line 419, "pan.___", state 1877, "(1)"
- line 419, "pan.___", state 1878, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1878, "else"
- line 419, "pan.___", state 1881, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 404, "pan.___", state 1916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1960, "(1)"
- line 404, "pan.___", state 2007, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2051, "(1)"
- line 404, "pan.___", state 2102, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2146, "(1)"
- line 703, "pan.___", state 2192, "-end-"
- (144 of 2192 states)
-unreached in proctype :init:
- line 710, "pan.___", state 9, "((j<2))"
- line 710, "pan.___", state 9, "((j>=2))"
- line 711, "pan.___", state 20, "((j<2))"
- line 711, "pan.___", state 20, "((j>=2))"
- line 716, "pan.___", state 33, "((j<2))"
- line 716, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 15.9 seconds
-pan: rate 77100.693 states/second
-pan: avg transition delay 8.2609e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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-1960:1:17
-1961:1:25
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-1968:1:49
-1969:1:56
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-1971:1:68
-1972:1:69
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-1975:1:86
-1976:1:87
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-1978:2:2599
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-1980:1:99
-1981:0:2654
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-1983:0:2654
-1984:1:101
-1985:0:2654
-1986:2:2599
-1987:0:2654
-1988:1:102
-1989:1:106
-1990:1:107
-1991:1:115
-1992:1:116
-1993:1:120
-1994:1:121
-1995:1:129
-1996:1:134
-1997:1:138
-1998:1:139
-1999:1:146
-2000:1:147
-2001:1:158
-2002:1:159
-2003:1:160
-2004:1:171
-2005:1:176
-2006:1:177
-2007:0:2654
-2008:2:2600
-2009:0:2654
-2010:1:189
-2011:0:2654
-2012:2:2599
-2013:0:2654
-2014:1:191
-2015:0:2654
-2016:2:2600
-2017:0:2654
-2018:1:192
-2019:0:2654
-2020:2:2599
-2021:0:2654
-2022:1:193
-2023:1:197
-2024:1:198
-2025:1:206
-2026:1:207
-2027:1:211
-2028:1:212
-2029:1:220
-2030:1:225
-2031:1:229
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-2033:1:237
-2034:1:238
-2035:1:249
-2036:1:250
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-2038:1:262
-2039:1:267
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+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 5439 States= 1e+06 Transitions= 1.03e+07 Memory= 527.190 t= 8.16 R= 1e+05
-pan: claim violated! (at depth 1801)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 5439, errors: 1
- 1006552 states, stored
- 9396280 states, matched
- 10402832 transitions (= stored+matched)
- 36844262 atomic steps
-hash conflicts: 1832712 (resolved)
-
-Stats on memory usage (in Megabytes):
- 80.634 equivalent memory usage for states (stored*(State-vector + overhead))
- 61.871 actual memory usage for states (compression: 76.73%)
- state-vector as stored = 36 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 527.580 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 243, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 265, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 291, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 304, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 320, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 334, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 352, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 365, "(1)"
- line 413, "pan.___", state 378, "(1)"
- line 418, "pan.___", state 395, "(1)"
- line 399, "pan.___", state 414, "(1)"
- line 403, "pan.___", state 426, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 444, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 487, "(1)"
- line 403, "pan.___", state 519, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 537, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 563, "(1)"
- line 418, "pan.___", state 580, "(1)"
- line 179, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 629, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 651, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 677, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 690, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 714, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 716, "(1)"
- line 399, "pan.___", state 717, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 717, "else"
- line 399, "pan.___", state 720, "(1)"
- line 403, "pan.___", state 728, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 730, "(1)"
- line 403, "pan.___", state 731, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 731, "else"
- line 403, "pan.___", state 734, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 401, "pan.___", state 740, "((i<1))"
- line 401, "pan.___", state 740, "((i>=1))"
- line 408, "pan.___", state 746, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 759, "(1)"
- line 409, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 760, "else"
- line 409, "pan.___", state 763, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 413, "pan.___", state 772, "(1)"
- line 413, "pan.___", state 773, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 773, "else"
- line 413, "pan.___", state 776, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 411, "pan.___", state 782, "((i<1))"
- line 411, "pan.___", state 782, "((i>=1))"
- line 418, "pan.___", state 789, "(1)"
- line 418, "pan.___", state 790, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 790, "else"
- line 418, "pan.___", state 793, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 403, "pan.___", state 828, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 846, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 872, "(1)"
- line 418, "pan.___", state 889, "(1)"
- line 403, "pan.___", state 918, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 936, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 979, "(1)"
- line 399, "pan.___", state 998, "(1)"
- line 403, "pan.___", state 1010, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1028, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1054, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 403, "pan.___", state 1103, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1121, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1147, "(1)"
- line 418, "pan.___", state 1164, "(1)"
- line 179, "pan.___", state 1187, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1200, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 1213, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1235, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1252, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1261, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1300, "(1)"
- line 399, "pan.___", state 1301, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1301, "else"
- line 399, "pan.___", state 1304, "(1)"
- line 403, "pan.___", state 1312, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1314, "(1)"
- line 403, "pan.___", state 1315, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1315, "else"
- line 403, "pan.___", state 1318, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 401, "pan.___", state 1324, "((i<1))"
- line 401, "pan.___", state 1324, "((i>=1))"
- line 408, "pan.___", state 1330, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1343, "(1)"
- line 409, "pan.___", state 1344, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1344, "else"
- line 409, "pan.___", state 1347, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 413, "pan.___", state 1356, "(1)"
- line 413, "pan.___", state 1357, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1357, "else"
- line 413, "pan.___", state 1360, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 411, "pan.___", state 1366, "((i<1))"
- line 411, "pan.___", state 1366, "((i>=1))"
- line 418, "pan.___", state 1373, "(1)"
- line 418, "pan.___", state 1374, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1374, "else"
- line 418, "pan.___", state 1377, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 179, "pan.___", state 1406, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1419, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 1432, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1454, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1471, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1480, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1493, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 702, "pan.___", state 1520, "-end-"
- (144 of 1520 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 8.24 seconds
-pan: rate 122154.37 states/second
-pan: avg transition delay 7.9209e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-3:3:1937
-4:3:1937
-5:3:1940
-6:3:1948
-7:3:1948
-8:3:1951
-9:3:1957
-10:3:1961
-11:3:1961
-12:3:1964
-13:3:1972
-14:3:1976
-15:3:1977
-16:0:1982
-17:3:1979
-18:0:1982
-19:2:416
-20:0:1982
-21:2:422
-22:0:1982
-23:2:423
-24:0:1982
-25:2:424
-26:2:428
-27:2:429
-28:2:437
-29:2:438
-30:2:442
-31:2:443
-32:2:451
-33:2:456
-34:2:460
-35:2:461
-36:2:468
-37:2:469
-38:2:480
-39:2:481
-40:2:482
-41:2:493
-42:2:498
-43:2:499
-44:0:1982
-45:2:511
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-48:2:514
-49:0:1982
-50:2:518
-51:2:522
-52:2:523
-53:2:531
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-56:2:537
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-63:2:575
-64:2:576
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-1653:1:139
-1654:1:146
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-1656:1:158
-1657:1:159
-1658:1:160
-1659:1:171
-1660:1:183
-1661:1:184
-1662:0:1982
-1663:2:1927
-1664:0:1982
-1665:1:189
-1666:0:1982
-1667:2:1928
-1668:0:1982
-1669:1:191
-1670:0:1982
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-1672:0:1982
-1673:1:192
-1674:0:1982
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-1677:1:193
-1678:1:197
-1679:1:198
-1680:1:206
-1681:1:207
-1682:1:211
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-1684:1:220
-1685:1:225
-1686:1:229
-1687:1:230
-1688:1:237
-1689:1:238
-1690:1:249
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-1692:1:251
-1693:1:262
-1694:1:274
-1695:1:275
-1696:0:1982
-1697:2:1927
-1698:0:1982
-1699:1:280
-1700:0:1982
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-1703:1:282
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-1705:2:1927
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-1707:1:291
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-1711:1:293
-1712:0:1982
-1713:2:1927
-1714:0:1982
-1715:1:11
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-1732:1:69
-1733:1:70
-1734:1:81
-1735:1:93
-1736:1:94
-1737:0:1982
-1738:2:1927
-1739:0:1982
-1740:1:99
-1741:0:1982
-1742:2:1928
-1743:0:1982
-1744:1:101
-1745:0:1982
-1746:2:1927
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-1752:1:116
-1753:1:120
-1754:1:121
-1755:1:129
-1756:1:134
-1757:1:138
-1758:1:139
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-1763:1:160
-1764:1:171
-1765:1:183
-1766:1:184
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-1768:2:1928
-1769:0:1982
-1770:1:189
-1771:0:1982
-1772:2:1927
-1773:0:1982
-1774:1:285
-1775:0:1982
-1776:2:1928
-1777:0:1982
-1778:1:286
-1779:0:1982
-1780:2:1927
-1781:0:1982
-1782:1:291
-1783:0:1982
-1784:2:1928
-1785:0:1982
-1786:1:293
-1787:0:1982
-1788:2:1927
-1789:0:1982
-1790:1:296
-1791:0:1982
-1792:2:1928
-1793:0:1982
-1794:1:301
-1795:0:1982
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-1797:0:1982
-1798:1:302
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-1800:2:1928
-1801:0:1986
-1802:1:124
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1882)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4174, errors: 1
- 367189 states, stored
- 3431533 states, matched
- 3798722 transitions (= stored+matched)
- 13407384 atomic steps
-hash conflicts: 253700 (resolved)
-
-Stats on memory usage (in Megabytes):
- 29.415 equivalent memory usage for states (stored*(State-vector + overhead))
- 22.811 actual memory usage for states (compression: 77.55%)
- state-vector as stored = 37 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 488.518 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 331, "(1)"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (18 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 401, "pan.___", state 134, "((i<1))"
- line 401, "pan.___", state 134, "((i>=1))"
- line 409, "pan.___", state 153, "(1)"
- line 409, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 154, "else"
- line 409, "pan.___", state 157, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 413, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 167, "else"
- line 413, "pan.___", state 170, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 411, "pan.___", state 176, "((i<1))"
- line 411, "pan.___", state 176, "((i>=1))"
- line 418, "pan.___", state 183, "(1)"
- line 418, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 184, "else"
- line 418, "pan.___", state 187, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 369, "pan.___", state 193, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 646, "pan.___", state 202, "((write_lock==0))"
- line 646, "pan.___", state 202, "else"
- line 644, "pan.___", state 203, "(1)"
- line 160, "pan.___", state 209, "(1)"
- line 164, "pan.___", state 217, "(1)"
- line 164, "pan.___", state 218, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 164, "pan.___", state 218, "else"
- line 162, "pan.___", state 223, "((j<1))"
- line 162, "pan.___", state 223, "((j>=1))"
- line 168, "pan.___", state 229, "(1)"
- line 168, "pan.___", state 230, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 168, "pan.___", state 230, "else"
- line 160, "pan.___", state 241, "(1)"
- line 168, "pan.___", state 261, "(1)"
- line 160, "pan.___", state 277, "(1)"
- line 164, "pan.___", state 285, "(1)"
- line 168, "pan.___", state 297, "(1)"
- line 399, "pan.___", state 311, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 325, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 343, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 356, "(1)"
- line 413, "pan.___", state 369, "(1)"
- line 418, "pan.___", state 386, "(1)"
- line 399, "pan.___", state 405, "(1)"
- line 403, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 461, "(1)"
- line 418, "pan.___", state 478, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 164, "pan.___", state 594, "(1)"
- line 168, "pan.___", state 606, "(1)"
- line 160, "pan.___", state 618, "(1)"
- line 168, "pan.___", state 638, "(1)"
- line 164, "pan.___", state 662, "(1)"
- line 168, "pan.___", state 674, "(1)"
- line 399, "pan.___", state 696, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 698, "(1)"
- line 399, "pan.___", state 699, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 699, "else"
- line 399, "pan.___", state 702, "(1)"
- line 403, "pan.___", state 710, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 712, "(1)"
- line 403, "pan.___", state 713, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 713, "else"
- line 403, "pan.___", state 716, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 401, "pan.___", state 722, "((i<1))"
- line 401, "pan.___", state 722, "((i>=1))"
- line 408, "pan.___", state 728, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 741, "(1)"
- line 409, "pan.___", state 742, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 742, "else"
- line 409, "pan.___", state 745, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 413, "pan.___", state 754, "(1)"
- line 413, "pan.___", state 755, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 755, "else"
- line 413, "pan.___", state 758, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 411, "pan.___", state 764, "((i<1))"
- line 411, "pan.___", state 764, "((i>=1))"
- line 418, "pan.___", state 771, "(1)"
- line 418, "pan.___", state 772, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 772, "else"
- line 418, "pan.___", state 775, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 403, "pan.___", state 810, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 828, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 854, "(1)"
- line 418, "pan.___", state 871, "(1)"
- line 403, "pan.___", state 900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 918, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 944, "(1)"
- line 418, "pan.___", state 961, "(1)"
- line 399, "pan.___", state 980, "(1)"
- line 403, "pan.___", state 992, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1010, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1036, "(1)"
- line 418, "pan.___", state 1053, "(1)"
- line 403, "pan.___", state 1085, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1103, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1129, "(1)"
- line 418, "pan.___", state 1146, "(1)"
- line 164, "pan.___", state 1169, "(1)"
- line 168, "pan.___", state 1181, "(1)"
- line 160, "pan.___", state 1193, "(1)"
- line 168, "pan.___", state 1213, "(1)"
- line 164, "pan.___", state 1237, "(1)"
- line 168, "pan.___", state 1249, "(1)"
- line 399, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1273, "(1)"
- line 399, "pan.___", state 1274, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1274, "else"
- line 399, "pan.___", state 1277, "(1)"
- line 403, "pan.___", state 1285, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1287, "(1)"
- line 403, "pan.___", state 1288, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1288, "else"
- line 403, "pan.___", state 1291, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 401, "pan.___", state 1297, "((i<1))"
- line 401, "pan.___", state 1297, "((i>=1))"
- line 408, "pan.___", state 1303, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1316, "(1)"
- line 409, "pan.___", state 1317, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1317, "else"
- line 409, "pan.___", state 1320, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 413, "pan.___", state 1329, "(1)"
- line 413, "pan.___", state 1330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1330, "else"
- line 413, "pan.___", state 1333, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 411, "pan.___", state 1339, "((i<1))"
- line 411, "pan.___", state 1339, "((i>=1))"
- line 418, "pan.___", state 1346, "(1)"
- line 418, "pan.___", state 1347, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1347, "else"
- line 418, "pan.___", state 1350, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 164, "pan.___", state 1379, "(1)"
- line 168, "pan.___", state 1391, "(1)"
- line 160, "pan.___", state 1403, "(1)"
- line 168, "pan.___", state 1423, "(1)"
- line 164, "pan.___", state 1447, "(1)"
- line 168, "pan.___", state 1459, "(1)"
- line 702, "pan.___", state 1484, "-end-"
- (160 of 1484 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 2.96 seconds
-pan: rate 124050.34 states/second
-pan: avg transition delay 7.7921e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-1756:2:1280
-1757:2:1281
-1758:0:1946
-1759:2:1293
-1760:0:1946
-1761:2:1295
-1762:0:1946
-1763:2:1296
-1764:2:1300
-1765:2:1301
-1766:2:1309
-1767:2:1310
-1768:2:1314
-1769:2:1315
-1770:2:1323
-1771:2:1328
-1772:2:1332
-1773:2:1333
-1774:2:1340
-1775:2:1341
-1776:2:1352
-1777:2:1353
-1778:2:1354
-1779:2:1365
-1780:2:1370
-1781:2:1371
-1782:0:1946
-1783:2:1383
-1784:0:1946
-1785:2:1385
-1786:0:1946
-1787:2:1388
-1788:2:1389
-1789:2:1401
-1790:2:1402
-1791:2:1406
-1792:2:1407
-1793:2:1415
-1794:2:1420
-1795:2:1424
-1796:2:1425
-1797:2:1432
-1798:2:1433
-1799:2:1444
-1800:2:1445
-1801:2:1446
-1802:2:1457
-1803:2:1462
-1804:2:1463
-1805:0:1946
-1806:2:1475
-1807:0:1946
-1808:2:1477
-1809:0:1946
-1810:2:1478
-1811:0:1946
-1812:2:1479
-1813:0:1946
-1814:2:1480
-1815:0:1946
-1816:2:1481
-1817:2:1485
-1818:2:1486
-1819:2:1494
-1820:2:1495
-1821:2:1499
-1822:2:1500
-1823:2:1508
-1824:2:1513
-1825:2:1517
-1826:2:1518
-1827:2:1525
-1828:2:1526
-1829:2:1537
-1830:2:1538
-1831:2:1539
-1832:2:1550
-1833:2:1555
-1834:2:1556
-1835:0:1946
-1836:2:1568
-1837:0:1946
-1838:2:1672
-1839:0:1946
-1840:2:1770
-1841:0:1946
-1842:2:1771
-1843:0:1946
-1844:2:1775
-1845:0:1946
-1846:2:1781
-1847:2:1788
-1848:2:1789
-1849:2:1796
-1850:2:1801
-1851:0:1946
-1852:2:1812
-1853:0:1946
-1854:2:1813
-1855:2:1820
-1856:2:1823
-1857:2:1824
-1858:2:1828
-1859:2:1833
-1860:0:1946
-1861:2:1844
-1862:0:1946
-1863:2:1849
-1864:2:1856
-1865:2:1857
-1866:2:1864
-1867:2:1869
-1868:0:1946
-1869:2:1880
-1870:0:1946
-1871:2:1882
-1872:0:1946
-1873:2:1883
-1874:0:1946
-1875:2:1886
-1876:0:1946
-1877:2:1891
-1878:0:1946
-1879:1:302
-1880:0:1944
-1881:2:1892
-1882:0:1950
-1883:1:143
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1371)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3387, errors: 1
- 206295 states, stored
- 1902753 states, matched
- 2109048 transitions (= stored+matched)
- 7663223 atomic steps
-hash conflicts: 101109 (resolved)
-
-Stats on memory usage (in Megabytes):
- 16.526 equivalent memory usage for states (stored*(State-vector + overhead))
- 13.080 actual memory usage for states (compression: 79.15%)
- state-vector as stored = 38 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 478.752 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 179, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1003, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1013, "(1)"
- line 164, "pan.___", state 1021, "(1)"
- line 168, "pan.___", state 1033, "(1)"
- line 175, "pan.___", state 1044, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1066, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1076, "(1)"
- line 164, "pan.___", state 1084, "(1)"
- line 168, "pan.___", state 1096, "(1)"
- line 175, "pan.___", state 1111, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1133, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1143, "(1)"
- line 164, "pan.___", state 1151, "(1)"
- line 168, "pan.___", state 1163, "(1)"
- line 702, "pan.___", state 1188, "-end-"
- (100 of 1188 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.66 seconds
-pan: rate 124274.1 states/second
-pan: avg transition delay 7.8708e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-1299:2:1073
-1300:2:1074
-1301:0:1650
-1302:2:1086
-1303:0:1650
-1304:2:1283
-1305:0:1650
-1306:2:1381
-1307:0:1650
-1308:2:1382
-1309:0:1650
-1310:2:1386
-1311:0:1650
-1312:2:1395
-1313:2:1396
-1314:2:1400
-1315:2:1404
-1316:2:1405
-1317:2:1409
-1318:2:1417
-1319:2:1418
-1320:2:1423
-1321:2:1430
-1322:2:1431
-1323:2:1438
-1324:2:1443
-1325:0:1650
-1326:2:1454
-1327:0:1650
-1328:2:1458
-1329:2:1459
-1330:2:1463
-1331:2:1467
-1332:2:1468
-1333:2:1472
-1334:2:1480
-1335:2:1481
-1336:2:1486
-1337:2:1493
-1338:2:1494
-1339:2:1501
-1340:2:1506
-1341:0:1650
-1342:2:1517
-1343:0:1650
-1344:2:1525
-1345:2:1526
-1346:2:1530
-1347:2:1534
-1348:2:1535
-1349:2:1539
-1350:2:1547
-1351:2:1548
-1352:2:1553
-1353:2:1560
-1354:2:1561
-1355:2:1568
-1356:2:1573
-1357:0:1650
-1358:2:1584
-1359:0:1650
-1360:2:1586
-1361:0:1650
-1362:2:1587
-1363:0:1650
-1364:2:1590
-1365:0:1650
-1366:2:1595
-1367:0:1650
-1368:1:302
-1369:0:1648
-1370:2:1596
-1371:0:1654
-1372:0:1650
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1767: Claim reached state 9 (line 748)
-Depth= 3880 States= 1e+06 Transitions= 1.71e+07 Memory= 499.651 t= 14.5 R= 7e+04
-Depth= 3880 States= 2e+06 Transitions= 3.79e+07 Memory= 532.365 t= 32.3 R= 6e+04
-Depth= 3880 States= 3e+06 Transitions= 5.83e+07 Memory= 564.983 t= 50.2 R= 6e+04
-pan: resizing hashtable to -w22.. done
-Depth= 3880 States= 4e+06 Transitions= 7.76e+07 Memory= 629.307 t= 67 R= 6e+04
-Depth= 3880 States= 5e+06 Transitions= 9.78e+07 Memory= 662.315 t= 84.2 R= 6e+04
-Depth= 3880 States= 6e+06 Transitions= 1.19e+08 Memory= 694.736 t= 102 R= 6e+04
-Depth= 3880 States= 7e+06 Transitions= 1.38e+08 Memory= 727.842 t= 119 R= 6e+04
-Depth= 3880 States= 8e+06 Transitions= 1.59e+08 Memory= 760.752 t= 137 R= 6e+04
-Depth= 3880 States= 9e+06 Transitions= 1.79e+08 Memory= 793.174 t= 155 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 3880 States= 1e+07 Transitions= 1.98e+08 Memory= 950.568 t= 172 R= 6e+04
-Depth= 3880 States= 1.1e+07 Transitions= 2.19e+08 Memory= 983.479 t= 189 R= 6e+04
-Depth= 3880 States= 1.2e+07 Transitions= 2.4e+08 Memory= 1015.901 t= 207 R= 6e+04
-Depth= 3880 States= 1.3e+07 Transitions= 2.58e+08 Memory= 1049.397 t= 223 R= 6e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3880, errors: 0
- 7197860 states, stored (1.33457e+07 visited)
-2.5266654e+08 states, matched
-2.6601223e+08 transitions (= visited+matched)
-9.9067284e+08 atomic steps
-hash conflicts: 87783920 (resolved)
-
-Stats on memory usage (in Megabytes):
- 576.611 equivalent memory usage for states (stored*(State-vector + overhead))
- 474.839 actual memory usage for states (compression: 82.35%)
- state-vector as stored = 41 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1060.529 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 230 seconds
-pan: rate 58151.15 states/second
-pan: avg transition delay 8.6274e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4401
-2:4:4353
-3:4:4356
-4:4:4356
-5:4:4359
-6:4:4367
-7:4:4367
-8:4:4370
-9:4:4376
-10:4:4380
-11:4:4380
-12:4:4383
-13:4:4391
-14:4:4395
-15:4:4396
-16:0:4401
-17:4:4398
-18:0:4401
-19:3:2479
-20:0:4401
-21:3:2485
-22:0:4401
-23:3:2486
-24:0:4401
-25:3:2487
-26:3:2491
-27:3:2492
-28:3:2500
-29:3:2501
-30:3:2505
-31:3:2506
-32:3:2514
-33:3:2519
-34:3:2523
-35:3:2524
-36:3:2531
-37:3:2532
-38:3:2543
-39:3:2544
-40:3:2545
-41:3:2556
-42:3:2561
-43:3:2562
-44:0:4401
-45:3:2574
-46:0:4401
-47:3:2576
-48:3:2577
-49:0:4401
-50:3:2581
-51:3:2585
-52:3:2586
-53:3:2594
-54:3:2595
-55:3:2599
-56:3:2600
-57:3:2608
-58:3:2613
-59:3:2614
-60:3:2625
-61:3:2626
-62:3:2637
-63:3:2638
-64:3:2639
-65:3:2650
-66:3:2655
-67:3:2656
-68:0:4401
-69:3:2668
-70:0:4401
-71:3:2670
-72:0:4401
-73:3:2671
-74:0:4401
-75:3:2681
-76:0:4401
-77:3:2682
-78:0:4401
-79:3:2686
-80:3:2687
-81:3:2691
-82:3:2695
-83:3:2696
-84:3:2700
-85:3:2708
-86:3:2709
-87:3:2714
-88:3:2721
-89:3:2722
-90:3:2729
-91:3:2734
-92:0:4401
-93:3:2745
-94:0:4401
-95:3:2749
-96:3:2750
-97:3:2754
-98:3:2758
-99:3:2759
-100:3:2763
-101:3:2771
-102:3:2772
-103:3:2777
-104:3:2784
-105:3:2785
-106:3:2792
-107:3:2797
-108:0:4401
-109:3:2808
-110:0:4401
-111:3:2816
-112:3:2817
-113:3:2821
-114:3:2825
-115:3:2826
-116:3:2830
-117:3:2838
-118:3:2839
-119:3:2844
-120:3:2851
-121:3:2852
-122:3:2859
-123:3:2864
-124:0:4401
-125:3:2879
-126:0:4401
-127:3:2881
-128:0:4401
-129:3:2882
-130:3:2886
-131:3:2887
-132:3:2895
-133:3:2896
-134:3:2900
-135:3:2901
-136:3:2909
-137:3:2914
-138:3:2918
-139:3:2919
-140:3:2926
-141:3:2927
-142:3:2938
-143:3:2939
-144:3:2940
-145:3:2951
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-1039:3:4210
-1040:3:4214
-1041:3:4215
-1042:3:4219
-1043:3:4227
-1044:3:4228
-1045:3:4233
-1046:3:4240
-1047:3:4241
-1048:3:4248
-1049:3:4253
-1050:0:4401
-1051:3:4264
-1052:0:4401
-1053:3:4272
-1054:3:4273
-1055:3:4277
-1056:3:4281
-1057:3:4282
-1058:3:4286
-1059:3:4294
-1060:3:4295
-1061:3:4300
-1062:3:4307
-1063:3:4308
-1064:3:4315
-1065:3:4320
-1066:0:4401
-1067:3:4335
-1068:0:4401
-1069:3:4337
-1070:0:4401
-1071:3:4338
-1072:0:4401
-1073:3:4341
-1074:0:4401
-1075:3:4346
-1076:0:4401
-1077:2:1236
-1078:0:4401
-1079:3:4347
-1080:0:4401
-1081:2:1242
-1082:0:4401
-1083:3:4346
-1084:0:4401
-1085:2:1243
-1086:0:4401
-1087:3:4347
-1088:0:4401
-1089:2:1244
-1090:0:4401
-1091:3:4346
-1092:0:4401
-1093:2:1245
-1094:0:4401
-1095:3:4347
-1096:0:4401
-1097:1:2
-1098:0:4401
-1099:3:4346
-1100:0:4401
-1101:2:1246
-1102:0:4401
-1103:3:4347
-1104:0:4401
-1105:1:8
-1106:0:4401
-1107:3:4346
-1108:0:4401
-1109:2:1245
-1110:0:4401
-1111:3:4347
-1112:0:4401
-1113:1:9
-1114:0:4401
-1115:3:4346
-1116:0:4401
-1117:2:1246
-1118:0:4401
-1119:3:4347
-1120:0:4401
-1121:1:10
-1122:0:4401
-1123:3:4346
-1124:0:4401
-1125:2:1245
-1126:0:4401
-1127:3:4347
-1128:0:4401
-1129:1:11
-1130:0:4401
-1131:3:4346
-1132:0:4401
-1133:2:1246
-1134:0:4401
-1135:3:4347
-1136:0:4401
-1137:1:14
-1138:0:4401
-1139:3:4346
-1140:0:4401
-1141:2:1245
-1142:0:4401
-1143:3:4347
-1144:0:4401
-1145:1:15
-1146:0:4401
-1147:3:4346
-1148:0:4401
-1149:2:1246
-1150:0:4401
-1151:3:4347
-1152:0:4401
-1153:1:16
-1154:1:20
-1155:1:21
-1156:1:29
-1157:1:30
-1158:1:34
-1159:1:35
-1160:1:43
-1161:1:48
-1162:1:52
-1163:1:53
-1164:1:60
-1165:1:61
-1166:1:72
-1167:1:73
-1168:1:74
-1169:1:85
-1170:1:90
-1171:1:91
-1172:0:4401
-1173:3:4346
-1174:0:4401
-1175:2:1245
-1176:0:4401
-1177:3:4347
-1178:0:4401
-1179:1:103
-1180:0:4401
-1181:3:4346
-1182:0:4401
-1183:2:1246
-1184:0:4401
-1185:3:4347
-1186:0:4401
-1187:2:1247
-1188:0:4401
-1189:3:4346
-1190:0:4401
-1191:2:1253
-1192:0:4401
-1193:3:4347
-1194:0:4401
-1195:2:1254
-1196:0:4399
-1197:3:4346
-1198:0:4405
-1199:3:4347
-1200:0:4405
-1201:2:1257
-1202:0:4405
-1203:3:4346
-1204:0:4405
-1205:2:1258
-1206:0:4405
-1207:3:4347
-1208:0:4405
-1209:2:1259
-1210:2:1263
-1211:2:1264
-1212:2:1272
-1213:2:1273
-1214:2:1277
-1215:2:1278
-1216:2:1286
-1217:2:1291
-1218:2:1295
-1219:2:1296
-1220:2:1303
-1221:2:1304
-1222:2:1315
-1223:2:1316
-1224:2:1317
-1225:2:1328
-1226:2:1333
-1227:2:1334
-1228:0:4405
-1229:3:4346
-1230:0:4405
-1231:2:1346
-1232:0:4405
-1233:3:4347
-1234:0:4405
-1235:2:1347
-1236:0:4405
-1237:3:4346
-1238:0:4405
-1239:1:104
--1:-1:-1
-1240:0:4405
-1241:3:4347
-1242:0:4405
-1243:3:4346
-1244:0:4405
-1245:2:1348
-1246:0:4405
-1247:3:4347
-1248:0:4405
-1249:2:1347
-1250:0:4405
-1251:3:4346
-1252:0:4405
-1253:1:105
-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 291: Claim reached state 9 (line 748)
-Depth= 2677 States= 1e+06 Transitions= 1.57e+07 Memory= 487.932 t= 13.4 R= 7e+04
-Depth= 3023 States= 2e+06 Transitions= 3.19e+07 Memory= 509.709 t= 27.3 R= 7e+04
-Depth= 3610 States= 3e+06 Transitions= 4.84e+07 Memory= 531.486 t= 41.6 R= 7e+04
-pan: resizing hashtable to -w22.. done
-Depth= 3956 States= 4e+06 Transitions= 6.63e+07 Memory= 595.029 t= 57 R= 7e+04
-Depth= 3956 States= 5e+06 Transitions= 8.67e+07 Memory= 617.783 t= 74.5 R= 7e+04
-Depth= 3956 States= 6e+06 Transitions= 1.08e+08 Memory= 660.850 t= 93 R= 6e+04
-Depth= 3956 States= 7e+06 Transitions= 1.28e+08 Memory= 690.928 t= 110 R= 6e+04
-Depth= 3956 States= 8e+06 Transitions= 1.51e+08 Memory= 729.600 t= 129 R= 6e+04
-Depth= 3956 States= 9e+06 Transitions= 1.7e+08 Memory= 765.830 t= 146 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 3956 States= 1e+07 Transitions= 1.92e+08 Memory= 919.611 t= 166 R= 6e+04
-Depth= 3956 States= 1.1e+07 Transitions= 2.13e+08 Memory= 958.576 t= 183 R= 6e+04
-Depth= 3956 States= 1.2e+07 Transitions= 2.33e+08 Memory= 985.627 t= 201 R= 6e+04
-Depth= 3956 States= 1.3e+07 Transitions= 2.55e+08 Memory= 1027.033 t= 220 R= 6e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3956, errors: 0
- 7045896 states, stored (1.35792e+07 visited)
-2.5326206e+08 states, matched
-2.668413e+08 transitions (= visited+matched)
-9.9425626e+08 atomic steps
-hash conflicts: 65494104 (resolved)
-
-Stats on memory usage (in Megabytes):
- 564.437 equivalent memory usage for states (stored*(State-vector + overhead))
- 465.758 actual memory usage for states (compression: 82.52%)
- state-vector as stored = 41 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1051.350 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 230 seconds
-pan: rate 59137.889 states/second
-pan: avg transition delay 8.6051e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-depth 15: Claim reached state 9 (line 750)
-depth 291: Claim reached state 9 (line 749)
-pan: acceptance cycle (at depth 4308)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4820, errors: 1
- 62091 states, stored (169917 visited)
- 2179326 states, matched
- 2349243 transitions (= visited+matched)
- 8805349 atomic steps
-hash conflicts: 50953 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4.974 equivalent memory usage for states (stored*(State-vector + overhead))
- 4.145 actual memory usage for states (compression: 83.33%)
- state-vector as stored = 42 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 469.865 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 151, "(1)"
- line 419, "pan.___", state 181, "(1)"
- line 400, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 242, "(1)"
- line 419, "pan.___", state 272, "(1)"
- line 400, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 360, "(1)"
- line 419, "pan.___", state 390, "(1)"
- line 541, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 402, "pan.___", state 134, "((i<1))"
- line 402, "pan.___", state 134, "((i>=1))"
- line 410, "pan.___", state 153, "(1)"
- line 410, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 154, "else"
- line 410, "pan.___", state 157, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 414, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 167, "else"
- line 414, "pan.___", state 170, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 412, "pan.___", state 176, "((i<1))"
- line 412, "pan.___", state 176, "((i>=1))"
- line 419, "pan.___", state 183, "(1)"
- line 419, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 184, "else"
- line 419, "pan.___", state 187, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 370, "pan.___", state 193, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 647, "pan.___", state 202, "((write_lock==0))"
- line 647, "pan.___", state 202, "else"
- line 645, "pan.___", state 203, "(1)"
- line 176, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 225, "((j<1))"
- line 178, "pan.___", state 225, "((j>=1))"
- line 184, "pan.___", state 230, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 240, "(1)"
- line 165, "pan.___", state 248, "(1)"
- line 165, "pan.___", state 249, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 165, "pan.___", state 249, "else"
- line 163, "pan.___", state 254, "((j<1))"
- line 163, "pan.___", state 254, "((j>=1))"
- line 169, "pan.___", state 260, "(1)"
- line 169, "pan.___", state 261, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 169, "pan.___", state 261, "else"
- line 171, "pan.___", state 264, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 171, "pan.___", state 264, "else"
- line 176, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 180, "pan.___", state 280, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 288, "((j<1))"
- line 178, "pan.___", state 288, "((j>=1))"
- line 184, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 303, "(1)"
- line 165, "pan.___", state 311, "(1)"
- line 165, "pan.___", state 312, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 165, "pan.___", state 312, "else"
- line 163, "pan.___", state 317, "((j<1))"
- line 163, "pan.___", state 317, "((j>=1))"
- line 169, "pan.___", state 323, "(1)"
- line 169, "pan.___", state 324, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 169, "pan.___", state 324, "else"
- line 171, "pan.___", state 327, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 171, "pan.___", state 327, "else"
- line 215, "pan.___", state 333, "((i<1))"
- line 215, "pan.___", state 333, "((i>=1))"
- line 176, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 355, "((j<1))"
- line 178, "pan.___", state 355, "((j>=1))"
- line 184, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 370, "(1)"
- line 165, "pan.___", state 378, "(1)"
- line 165, "pan.___", state 379, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 165, "pan.___", state 379, "else"
- line 163, "pan.___", state 384, "((j<1))"
- line 163, "pan.___", state 384, "((j>=1))"
- line 169, "pan.___", state 390, "(1)"
- line 169, "pan.___", state 391, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 169, "pan.___", state 391, "else"
- line 171, "pan.___", state 394, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 171, "pan.___", state 394, "else"
- line 400, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 410, "(1)"
- line 404, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 424, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 402, "pan.___", state 430, "((i<1))"
- line 402, "pan.___", state 430, "((i>=1))"
- line 409, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 449, "(1)"
- line 410, "pan.___", state 450, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 450, "else"
- line 410, "pan.___", state 453, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 414, "pan.___", state 462, "(1)"
- line 414, "pan.___", state 463, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 463, "else"
- line 414, "pan.___", state 466, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 412, "pan.___", state 472, "((i<1))"
- line 412, "pan.___", state 472, "((i>=1))"
- line 419, "pan.___", state 479, "(1)"
- line 419, "pan.___", state 480, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 480, "else"
- line 419, "pan.___", state 483, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 370, "pan.___", state 489, "(1)"
- line 662, "pan.___", state 492, "cached_urcu_gp_ctr.val[_pid] = (tmp^(1<<7))"
- line 400, "pan.___", state 498, "(1)"
- line 400, "pan.___", state 499, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 499, "else"
- line 400, "pan.___", state 502, "(1)"
- line 404, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 516, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 402, "pan.___", state 522, "((i<1))"
- line 402, "pan.___", state 522, "((i>=1))"
- line 409, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 541, "(1)"
- line 410, "pan.___", state 542, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 542, "else"
- line 410, "pan.___", state 545, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 414, "pan.___", state 554, "(1)"
- line 414, "pan.___", state 555, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 555, "else"
- line 414, "pan.___", state 558, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 412, "pan.___", state 564, "((i<1))"
- line 412, "pan.___", state 564, "((i>=1))"
- line 419, "pan.___", state 571, "(1)"
- line 419, "pan.___", state 572, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 572, "else"
- line 419, "pan.___", state 575, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 370, "pan.___", state 581, "(1)"
- line 400, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 595, "(1)"
- line 404, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 609, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 402, "pan.___", state 615, "((i<1))"
- line 402, "pan.___", state 615, "((i>=1))"
- line 409, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 634, "(1)"
- line 410, "pan.___", state 635, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 635, "else"
- line 410, "pan.___", state 638, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 414, "pan.___", state 647, "(1)"
- line 414, "pan.___", state 648, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 648, "else"
- line 414, "pan.___", state 651, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 412, "pan.___", state 657, "((i<1))"
- line 412, "pan.___", state 657, "((i>=1))"
- line 419, "pan.___", state 664, "(1)"
- line 419, "pan.___", state 665, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 665, "else"
- line 419, "pan.___", state 668, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 370, "pan.___", state 674, "(1)"
- line 400, "pan.___", state 679, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 681, "(1)"
- line 400, "pan.___", state 682, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 682, "else"
- line 400, "pan.___", state 685, "(1)"
- line 404, "pan.___", state 693, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 695, "(1)"
- line 404, "pan.___", state 696, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 696, "else"
- line 404, "pan.___", state 699, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 402, "pan.___", state 705, "((i<1))"
- line 402, "pan.___", state 705, "((i>=1))"
- line 409, "pan.___", state 711, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 724, "(1)"
- line 410, "pan.___", state 725, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 725, "else"
- line 410, "pan.___", state 728, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 414, "pan.___", state 737, "(1)"
- line 414, "pan.___", state 738, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 738, "else"
- line 414, "pan.___", state 741, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 412, "pan.___", state 747, "((i<1))"
- line 412, "pan.___", state 747, "((i>=1))"
- line 419, "pan.___", state 754, "(1)"
- line 419, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 755, "else"
- line 419, "pan.___", state 758, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 370, "pan.___", state 764, "(1)"
- line 430, "pan.___", state 767, "(((tmp2&((1<<7)-1))&&((tmp2^cached_urcu_gp_ctr.val[_pid])&(1<<7))))"
- line 430, "pan.___", state 767, "else"
- line 400, "pan.___", state 777, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 779, "(1)"
- line 400, "pan.___", state 780, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 780, "else"
- line 400, "pan.___", state 783, "(1)"
- line 404, "pan.___", state 791, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 793, "(1)"
- line 404, "pan.___", state 794, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 794, "else"
- line 404, "pan.___", state 797, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 402, "pan.___", state 803, "((i<1))"
- line 402, "pan.___", state 803, "((i>=1))"
- line 409, "pan.___", state 809, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 822, "(1)"
- line 410, "pan.___", state 823, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 823, "else"
- line 410, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 414, "pan.___", state 835, "(1)"
- line 414, "pan.___", state 836, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 836, "else"
- line 414, "pan.___", state 839, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 412, "pan.___", state 845, "((i<1))"
- line 412, "pan.___", state 845, "((i>=1))"
- line 419, "pan.___", state 852, "(1)"
- line 419, "pan.___", state 853, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 853, "else"
- line 419, "pan.___", state 856, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 370, "pan.___", state 862, "(1)"
- line 449, "pan.___", state 870, "((tmp<1))"
- line 449, "pan.___", state 870, "((tmp>=1))"
- line 462, "pan.___", state 873, "tmp = 0"
- line 400, "pan.___", state 877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 883, "(1)"
- line 404, "pan.___", state 891, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 897, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 903, "((i<1))"
- line 402, "pan.___", state 903, "((i>=1))"
- line 409, "pan.___", state 909, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 922, "(1)"
- line 410, "pan.___", state 923, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 923, "else"
- line 410, "pan.___", state 926, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 414, "pan.___", state 935, "(1)"
- line 414, "pan.___", state 936, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 936, "else"
- line 414, "pan.___", state 939, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 945, "((i<1))"
- line 412, "pan.___", state 945, "((i>=1))"
- line 419, "pan.___", state 952, "(1)"
- line 419, "pan.___", state 953, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 953, "else"
- line 419, "pan.___", state 956, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 370, "pan.___", state 962, "(1)"
- line 671, "pan.___", state 963, "tmp = cached_urcu_gp_ctr.val[_pid]"
- line 400, "pan.___", state 967, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 973, "(1)"
- line 404, "pan.___", state 981, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 987, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 402, "pan.___", state 993, "((i<1))"
- line 402, "pan.___", state 993, "((i>=1))"
- line 409, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1012, "(1)"
- line 410, "pan.___", state 1013, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1013, "else"
- line 410, "pan.___", state 1016, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 414, "pan.___", state 1025, "(1)"
- line 414, "pan.___", state 1026, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1026, "else"
- line 414, "pan.___", state 1029, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 412, "pan.___", state 1035, "((i<1))"
- line 412, "pan.___", state 1035, "((i>=1))"
- line 419, "pan.___", state 1042, "(1)"
- line 419, "pan.___", state 1043, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1043, "else"
- line 419, "pan.___", state 1046, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 370, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1061, "(1)"
- line 404, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1117, "(1)"
- line 419, "pan.___", state 1134, "(1)"
- line 404, "pan.___", state 1166, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1184, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1210, "(1)"
- line 419, "pan.___", state 1227, "(1)"
- line 400, "pan.___", state 1242, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1256, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1287, "(1)"
- line 414, "pan.___", state 1300, "(1)"
- line 419, "pan.___", state 1317, "(1)"
- line 400, "pan.___", state 1340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1342, "(1)"
- line 400, "pan.___", state 1343, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1343, "else"
- line 400, "pan.___", state 1346, "(1)"
- line 404, "pan.___", state 1354, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1356, "(1)"
- line 404, "pan.___", state 1357, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1357, "else"
- line 404, "pan.___", state 1360, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 402, "pan.___", state 1366, "((i<1))"
- line 402, "pan.___", state 1366, "((i>=1))"
- line 409, "pan.___", state 1372, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1385, "(1)"
- line 410, "pan.___", state 1386, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1386, "else"
- line 410, "pan.___", state 1389, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 414, "pan.___", state 1398, "(1)"
- line 414, "pan.___", state 1399, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1399, "else"
- line 414, "pan.___", state 1402, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 412, "pan.___", state 1408, "((i<1))"
- line 412, "pan.___", state 1408, "((i>=1))"
- line 419, "pan.___", state 1415, "(1)"
- line 419, "pan.___", state 1416, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1416, "else"
- line 419, "pan.___", state 1419, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 180, "pan.___", state 1448, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 184, "pan.___", state 1461, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 1471, "(1)"
- line 165, "pan.___", state 1479, "(1)"
- line 169, "pan.___", state 1491, "(1)"
- line 176, "pan.___", state 1502, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 184, "pan.___", state 1524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 1534, "(1)"
- line 165, "pan.___", state 1542, "(1)"
- line 169, "pan.___", state 1554, "(1)"
- line 176, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 184, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 1601, "(1)"
- line 165, "pan.___", state 1609, "(1)"
- line 169, "pan.___", state 1621, "(1)"
- line 370, "pan.___", state 1642, "(1)"
- line 696, "pan.___", state 1643, "(1)"
- line 703, "pan.___", state 1646, "-end-"
- (308 of 1646 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 752, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 2.02 seconds
-pan: rate 84117.327 states/second
-pan: avg transition delay 8.5985e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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-4811:1:48
-4812:1:49
-4813:1:56
-4814:1:57
-4815:1:68
-4816:1:69
-4817:1:70
-4818:1:81
-4819:1:86
-4820:1:87
+++ /dev/null
-pan*
-*.trail
+++ /dev/null
-/*
- * urcu_mbmin.spin: Promela code to validate urcu. See commit number
- * 3a9e6e9df706b8d39af94d2f027210e2e7d4106e of Mathieu Desnoyer's
- * git archive at git://lttng.org/userspace-rcu.git, but with
- * memory barriers removed.
- *
- * This validates a single reader against a single updater. The
- * updater is assumed to have smp_mb() barriers between each pair
- * of operations, and this model validates that a signal-mediated
- * broadcast barrier is required only at the beginning and end of
- * the synchronize_rcu().
- *
- * Note that the second half of a prior synchronize_rcu() is modelled
- * as well as the current synchronize_rcu().
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
- */
-
-/* Promela validation variables. */
-
-bit removed = 0; /* Has RCU removal happened, e.g., list_del_rcu()? */
-bit free = 0; /* Has RCU reclamation happened, e.g., kfree()? */
-bit need_mb = 0; /* =1 says need reader mb, =0 for reader response. */
-byte reader_progress[4]; /* Count of read-side statement executions. */
-bit reader_done = 0; /* =0 says reader still running, =1 says done. */
-bit updater_done = 0; /* =0 says updater still running, =1 says done. */
-
-/* Broadcast memory barriers to enable, prior synchronize_rcu() instance. */
-
-/* #define MB_A */ /* Not required for correctness. */
-/* #define MB_B */ /* Not required for correctness. */
-/* #define MB_C */ /* Not required for correctness. */
-
-/* Broadcast memory barriers to enable, current synchronize_rcu() instance. */
-
-#define MB_D /* First broadcast barrier in synchronize_rcu(). */
-/* #define MB_E */ /* Not required for correctness. */
-/* #define MB_F */ /* Not required for correctness. */
-#define MB_G /* Last broadcast barrier in synchronize_rcu(). */
-
-/* urcu definitions and variables, taken straight from the algorithm. */
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-byte urcu_gp_ctr = 1;
-byte urcu_active_readers = 0;
-
-/* Model the RCU read-side critical section. */
-
-proctype urcu_reader()
-{
- bit done = 0;
- bit mbok;
- byte tmp;
- byte tmp_removed;
- byte tmp_free;
-
- /* Absorb any early requests for memory barriers. */
- do
- :: need_mb == 1 ->
- need_mb = 0;
- :: 1 -> break;
- od;
-
- /*
- * Each pass through this loop executes one read-side statement
- * from the following code fragment:
- *
- * rcu_read_lock(); [0a]
- * rcu_read_lock(); [0b]
- * p = rcu_dereference(global_p); [1]
- * x = p->data; [2]
- * rcu_read_unlock(); [3b]
- * rcu_read_unlock(); [3a]
- *
- * Because we are modeling a weak-memory machine, these statements
- * can be seen in any order, the only restriction being that
- * rcu_read_unlock() cannot precede the corresponding rcu_read_lock().
- * The placement of the inner rcu_read_lock() and rcu_read_unlock()
- * is non-deterministic, the above is but one possible placement.
- * Intestingly enough, this model validates all possible placements
- * of the inner rcu_read_lock() and rcu_read_unlock() statements,
- * with the only constraint being that the rcu_read_lock() must
- * precede the rcu_read_unlock().
- *
- * We also respond to memory-barrier requests, but only if our
- * execution happens to be ordered. If the current state is
- * misordered, we ignore memory-barrier requests.
- */
- do
- :: 1 ->
- if
- :: reader_progress[0] < 2 -> /* [0a and 0b] */
- tmp = urcu_active_readers;
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK) == 0 ->
- tmp = urcu_gp_ctr;
- do
- :: (reader_progress[1] +
- reader_progress[2] +
- reader_progress[3] == 0) && need_mb == 1 ->
- need_mb = 0;
- :: need_mb == 0 && !updater_done -> skip;
- :: 1 -> break;
- od;
- urcu_active_readers = tmp;
- :: else ->
- urcu_active_readers = tmp + 1;
- fi;
- reader_progress[0] = reader_progress[0] + 1;
- :: reader_progress[1] == 0 -> /* [1] */
- tmp_removed = removed;
- reader_progress[1] = 1;
- :: reader_progress[2] == 0 -> /* [2] */
- tmp_free = free;
- reader_progress[2] = 1;
- :: ((reader_progress[0] > reader_progress[3]) &&
- (reader_progress[3] < 2)) -> /* [3a and 3b] */
- tmp = urcu_active_readers - 1;
- urcu_active_readers = tmp;
- reader_progress[3] = reader_progress[3] + 1;
- :: else -> break;
- fi;
-
- /* Process memory-barrier requests, if it is safe to do so. */
- atomic {
- mbok = 0;
- tmp = 0;
- do
- :: tmp < 4 && reader_progress[tmp] == 0 ->
- tmp = tmp + 1;
- break;
- :: tmp < 4 && reader_progress[tmp] != 0 ->
- tmp = tmp + 1;
- :: tmp >= 4 &&
- reader_progress[0] == reader_progress[3] ->
- done = 1;
- break;
- :: tmp >= 4 &&
- reader_progress[0] != reader_progress[3] ->
- break;
- od;
- do
- :: tmp < 4 && reader_progress[tmp] == 0 ->
- tmp = tmp + 1;
- :: tmp < 4 && reader_progress[tmp] != 0 ->
- break;
- :: tmp >= 4 ->
- mbok = 1;
- break;
- od
-
- }
-
- if
- :: mbok == 1 ->
- /* We get here if mb processing is safe. */
- do
- :: need_mb == 1 ->
- need_mb = 0;
- :: 1 -> break;
- od;
- :: else -> skip;
- fi;
-
- /*
- * Check to see if we have modeled the entire RCU read-side
- * critical section, and leave if so.
- */
- if
- :: done == 1 -> break;
- :: else -> skip;
- fi
- od;
- assert((tmp_free == 0) || (tmp_removed == 1));
-
- /* Reader has completed. */
- reader_done = 1;
-
- /*
- * Process any late-arriving memory-barrier requests, and
- * in addition create a progress cycle.
- */
- reader_done = 1;
-
- do
- :: need_mb == 1 ->
- need_mb = 0;
- :: 1 ->
-progress_reader:
- skip;
- :: 1 -> break;
- od;
-}
-
-/* Model the RCU update process. */
-
-proctype urcu_updater()
-{
- byte tmp;
-
- /*
- * ----------------------------------------------------------------
- * prior synchronize_rcu().
- */
-
- /* prior synchronize_rcu(), second counter flip. */
-#ifdef MB_A
- need_mb = 1; /* mb() A (analogous to omitted barrier between E and F) */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_A */
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
-#ifdef MB_B
- need_mb = 1; /* mb() B (analogous to F) */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_B */
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (urcu_gp_ctr & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi
- od;
-#ifdef MB_C
- need_mb = 1; /* mb() C absolutely required by analogy with G */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_C */
-
- /* Removal statement, e.g., list_del_rcu(). */
- removed = 1;
-
- /*
- * prior synchronize_rcu().
- * ----------------------------------------------------------------
- */
-
- /*
- * ----------------------------------------------------------------
- * current synchronize_rcu().
- */
-
- /* current synchronize_rcu(), first counter flip. */
-#ifdef MB_D
- need_mb = 1; /* mb() D suggested */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_D */
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
-#ifdef MB_E
- need_mb = 1; /* mb() E required if D not present */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_E */
-
- /* current synchronize_rcu(), first-flip check plus second flip. */
- if
- :: 1 ->
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (urcu_gp_ctr & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi;
- od;
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
- :: 1 ->
- tmp = urcu_gp_ctr;
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (tmp & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi;
- od;
- fi;
-
- /* current synchronize_rcu(), second counter flip check. */
-#ifdef MB_F
- need_mb = 1; /* mb() F not required */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_F */
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (urcu_gp_ctr & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi;
- od;
-#ifdef MB_G
- need_mb = 1; /* mb() G absolutely required */
- do
- :: need_mb == 1 && !reader_done -> skip;
- :: need_mb == 0 || reader_done -> break;
- od;
-#endif /* #ifdef MB_G */
-
- /*
- * current synchronize_rcu().
- * ----------------------------------------------------------------
- */
-
- /* free-up step, e.g., kfree(). */
- free = 1;
-
- /* We are done, so kill all the infinite loops in the reader. */
- updater_done = 1;
-
- /* Create a progress cycle. Correctness requires we get here. */
- do
- :: 1 ->
-progress_updater:
- skip;
- :: 1 -> break;
- od;
-}
-
-/*
- * Initialize the array, spawn a reader and an updater. Because readers
- * are independent of each other, only one reader is needed.
- */
-
-init {
- atomic {
- reader_progress[0] = 0;
- reader_progress[1] = 0;
- reader_progress[2] = 0;
- reader_progress[3] = 0;
- run urcu_reader();
- run urcu_updater();
- }
-}
+++ /dev/null
-spin -a urcu-paulmck.spin
-cc -DNP -o pan pan.c
-./pan -f -l
+++ /dev/null
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan
+++ /dev/null
-/*
- * urcu.spin: Promela code to validate urcu. See commit number
- * 3a9e6e9df706b8d39af94d2f027210e2e7d4106e of Mathieu Desnoyer's
- * git archive at git://lttng.org/userspace-rcu.git
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
- */
-
-/* Promela validation variables. */
-
-bit removed = 0; /* Has RCU removal happened, e.g., list_del_rcu()? */
-bit free = 0; /* Has RCU reclamation happened, e.g., kfree()? */
-bit need_mb = 0; /* =1 says need reader mb, =0 for reader response. */
-byte reader_progress[4];
- /* Count of read-side statement executions. */
-bit reader_done = 0;
- /* =0 says reader still running, =1 says done. */
-bit updater_done = 0;
- /* =0 says updater still running, =1 says done. */
-
-/* urcu definitions and variables, taken straight from the algorithm. */
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-byte urcu_gp_ctr = 1;
-byte urcu_active_readers = 0;
-
-/* Model the RCU read-side critical section. */
-
-proctype urcu_reader()
-{
- bit done = 0;
- bit mbok;
- byte tmp;
- byte tmp_removed;
- byte tmp_free;
-
- /* Absorb any early requests for memory barriers. */
- do
- :: need_mb == 1 ->
- need_mb = 0;
- :: !updater_done -> skip;
- :: 1 -> break;
- od;
-
- /*
- * Each pass through this loop executes one read-side statement
- * from the following code fragment:
- *
- * rcu_read_lock(); [0a]
- * rcu_read_lock(); [0b]
- * p = rcu_dereference(global_p); [1]
- * x = p->data; [2]
- * rcu_read_unlock(); [3b]
- * rcu_read_unlock(); [3a]
- *
- * Because we are modeling a weak-memory machine, these statements
- * can be seen in any order, the only restriction being that
- * rcu_read_unlock() cannot precede the corresponding rcu_read_lock().
- * The placement of the inner rcu_read_lock() and rcu_read_unlock()
- * is non-deterministic, the above is but one possible placement.
- * Intestingly enough, this model validates all possible placements
- * of the inner rcu_read_lock() and rcu_read_unlock() statements,
- * with the only constraint being that the rcu_read_lock() must
- * precede the rcu_read_unlock().
- *
- * We also respond to memory-barrier requests, but only if our
- * execution happens to be ordered. If the current state is
- * misordered, we ignore memory-barrier requests.
- */
- do
- :: 1 ->
- if
- :: reader_progress[0] < 2 -> /* [0a and 0b] */
- tmp = urcu_active_readers;
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK) == 0 ->
- tmp = urcu_gp_ctr;
- do
- :: (reader_progress[1] +
- reader_progress[2] +
- reader_progress[3] == 0) && need_mb == 1 ->
- need_mb = 0;
- :: !updater_done -> skip;
- :: 1 -> break;
- od;
- urcu_active_readers = tmp;
- :: else ->
- urcu_active_readers = tmp + 1;
- fi;
- reader_progress[0] = reader_progress[0] + 1;
- :: reader_progress[1] == 0 -> /* [1] */
- tmp_removed = removed;
- reader_progress[1] = 1;
- :: reader_progress[2] == 0 -> /* [2] */
- tmp_free = free;
- reader_progress[2] = 1;
- :: ((reader_progress[0] > reader_progress[3]) &&
- (reader_progress[3] < 2)) -> /* [3a and 3b] */
- tmp = urcu_active_readers - 1;
- urcu_active_readers = tmp;
- reader_progress[3] = reader_progress[3] + 1;
- :: else -> break;
- fi;
-
- /* Process memory-barrier requests, if it is safe to do so. */
- atomic {
- mbok = 0;
- tmp = 0;
- do
- :: tmp < 4 && reader_progress[tmp] == 0 ->
- tmp = tmp + 1;
- break;
- :: tmp < 4 && reader_progress[tmp] != 0 ->
- tmp = tmp + 1;
- :: tmp >= 4 &&
- reader_progress[0] == reader_progress[3] ->
- done = 1;
- break;
- :: tmp >= 4 &&
- reader_progress[0] != reader_progress[3] ->
- break;
- od;
- do
- :: tmp < 4 && reader_progress[tmp] == 0 ->
- tmp = tmp + 1;
- :: tmp < 4 && reader_progress[tmp] != 0 ->
- break;
- :: tmp >= 4 ->
- mbok = 1;
- break;
- od
-
- }
-
- if
- :: mbok == 1 ->
- /* We get here if mb processing is safe. */
- do
- :: need_mb == 1 ->
- need_mb = 0;
- :: !updater_done -> skip;
- :: 1 -> break;
- od;
- :: else -> skip;
- fi;
-
- /*
- * Check to see if we have modeled the entire RCU read-side
- * critical section, and leave if so.
- */
- if
- :: done == 1 -> break;
- :: else -> skip;
- fi
- od;
- assert((tmp_free == 0) || (tmp_removed == 1));
-
- /* Reader has completed. */
- reader_done = 1;
-
- /* Process any late-arriving memory-barrier requests. */
- do
- :: need_mb == 1 ->
- need_mb = 0;
- :: !updater_done -> skip;
- :: 1 -> break;
- od;
-}
-
-/* Model the RCU update process. */
-
-proctype urcu_updater()
-{
- /* prior synchronize_rcu(), second counter flip. */
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (urcu_gp_ctr & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi;
- od;
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
-
- /* Removal statement, e.g., list_del_rcu(). */
- removed = 1;
-
- /* current synchronize_rcu(), first counter flip. */
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (urcu_gp_ctr & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi;
- od;
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
-
- /* current synchronize_rcu(), second counter flip. */
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
- urcu_gp_ctr = urcu_gp_ctr + RCU_GP_CTR_BIT;
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
- do
- :: 1 ->
- if
- :: (urcu_active_readers & RCU_GP_CTR_NEST_MASK) != 0 &&
- (urcu_active_readers & ~RCU_GP_CTR_NEST_MASK) !=
- (urcu_gp_ctr & ~RCU_GP_CTR_NEST_MASK) ->
- skip;
- :: else -> break;
- fi;
- od;
- need_mb = 1;
- do
- :: need_mb == 1 -> skip;
- :: need_mb == 0 -> break;
- od;
-
- /* free-up step, e.g., kfree(). */
- free = 1;
-
- /*
- * Signal updater done, ending any otherwise-infinite loops
- * in the reading process.
- */
- updater_done = 1;
-}
-
-/*
- * Initialize the array, spawn a reader and an updater. Because readers
- * are independent of each other, only one reader is needed.
- */
-
-init {
- atomic {
- reader_progress[0] = 0;
- reader_progress[1] = 0;
- reader_progress[2] = 0;
- reader_progress[3] = 0;
- run urcu_reader();
- run urcu_updater();
- }
-}
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 4926 States= 1e+06 Transitions= 9.03e+06 Memory= 527.287 t= 5.98 R= 2e+05
-Depth= 7228 States= 2e+06 Transitions= 1.88e+07 Memory= 588.322 t= 12.9 R= 2e+05
-Depth= 7228 States= 3e+06 Transitions= 3.14e+07 Memory= 649.358 t= 21.9 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 7228 States= 4e+06 Transitions= 4.3e+07 Memory= 741.416 t= 30.3 R= 1e+05
-Depth= 7228 States= 5e+06 Transitions= 5.65e+07 Memory= 802.451 t= 39.6 R= 1e+05
-Depth= 7228 States= 6e+06 Transitions= 6.78e+07 Memory= 863.486 t= 47.5 R= 1e+05
-Depth= 7228 States= 7e+06 Transitions= 8.05e+07 Memory= 924.522 t= 56.5 R= 1e+05
-Depth= 7228 States= 8e+06 Transitions= 9.49e+07 Memory= 985.557 t= 66.8 R= 1e+05
-Depth= 7228 States= 9e+06 Transitions= 1.06e+08 Memory= 1046.592 t= 74.7 R= 1e+05
-pan: resizing hashtable to -w24.. done
-Depth= 7228 States= 1e+07 Transitions= 1.18e+08 Memory= 1231.721 t= 84.9 R= 1e+05
-Depth= 7228 States= 1.1e+07 Transitions= 1.29e+08 Memory= 1292.756 t= 92.8 R= 1e+05
-Depth= 7228 States= 1.2e+07 Transitions= 1.4e+08 Memory= 1353.791 t= 100 R= 1e+05
-Depth= 7228 States= 1.3e+07 Transitions= 1.53e+08 Memory= 1414.826 t= 109 R= 1e+05
-Depth= 7228 States= 1.4e+07 Transitions= 1.65e+08 Memory= 1475.861 t= 117 R= 1e+05
-Depth= 7228 States= 1.5e+07 Transitions= 1.77e+08 Memory= 1536.897 t= 126 R= 1e+05
-Depth= 7228 States= 1.6e+07 Transitions= 1.89e+08 Memory= 1597.932 t= 134 R= 1e+05
-Depth= 7228 States= 1.7e+07 Transitions= 2.02e+08 Memory= 1658.967 t= 143 R= 1e+05
-Depth= 7228 States= 1.8e+07 Transitions= 2.16e+08 Memory= 1720.002 t= 153 R= 1e+05
-Depth= 7228 States= 1.9e+07 Transitions= 2.27e+08 Memory= 1781.037 t= 160 R= 1e+05
-Depth= 7228 States= 2e+07 Transitions= 2.39e+08 Memory= 1842.072 t= 169 R= 1e+05
-Depth= 7228 States= 2.1e+07 Transitions= 2.51e+08 Memory= 1903.108 t= 177 R= 1e+05
-Depth= 7228 States= 2.2e+07 Transitions= 2.62e+08 Memory= 1964.143 t= 185 R= 1e+05
-Depth= 7228 States= 2.3e+07 Transitions= 2.74e+08 Memory= 2025.178 t= 194 R= 1e+05
-Depth= 7228 States= 2.4e+07 Transitions= 2.86e+08 Memory= 2086.213 t= 203 R= 1e+05
-Depth= 7228 States= 2.5e+07 Transitions= 2.99e+08 Memory= 2147.248 t= 212 R= 1e+05
-Depth= 7228 States= 2.6e+07 Transitions= 3.1e+08 Memory= 2208.283 t= 220 R= 1e+05
-Depth= 7228 States= 2.7e+07 Transitions= 3.24e+08 Memory= 2269.318 t= 230 R= 1e+05
-Depth= 7228 States= 2.8e+07 Transitions= 3.37e+08 Memory= 2330.354 t= 239 R= 1e+05
-Depth= 7228 States= 2.9e+07 Transitions= 3.49e+08 Memory= 2391.389 t= 248 R= 1e+05
-Depth= 7228 States= 3e+07 Transitions= 3.6e+08 Memory= 2452.424 t= 256 R= 1e+05
-Depth= 7228 States= 3.1e+07 Transitions= 3.72e+08 Memory= 2513.459 t= 265 R= 1e+05
-Depth= 7228 States= 3.2e+07 Transitions= 3.83e+08 Memory= 2574.494 t= 273 R= 1e+05
-Depth= 7228 States= 3.3e+07 Transitions= 3.95e+08 Memory= 2635.529 t= 282 R= 1e+05
-Depth= 7228 States= 3.4e+07 Transitions= 4.07e+08 Memory= 2696.565 t= 291 R= 1e+05
-pan: resizing hashtable to -w26.. done
-Depth= 7228 States= 3.5e+07 Transitions= 4.2e+08 Memory= 3253.682 t= 308 R= 1e+05
-Depth= 7228 States= 3.6e+07 Transitions= 4.32e+08 Memory= 3314.717 t= 316 R= 1e+05
-Depth= 7228 States= 3.7e+07 Transitions= 4.45e+08 Memory= 3375.752 t= 325 R= 1e+05
-Depth= 7228 States= 3.8e+07 Transitions= 4.58e+08 Memory= 3436.787 t= 334 R= 1e+05
-Depth= 7228 States= 3.9e+07 Transitions= 4.71e+08 Memory= 3497.822 t= 343 R= 1e+05
-Depth= 7228 States= 4e+07 Transitions= 4.82e+08 Memory= 3558.858 t= 350 R= 1e+05
-Depth= 7228 States= 4.1e+07 Transitions= 4.94e+08 Memory= 3619.893 t= 359 R= 1e+05
-Depth= 7228 States= 4.2e+07 Transitions= 5.04e+08 Memory= 3680.928 t= 366 R= 1e+05
-Depth= 7228 States= 4.3e+07 Transitions= 5.16e+08 Memory= 3741.963 t= 374 R= 1e+05
-Depth= 7228 States= 4.4e+07 Transitions= 5.29e+08 Memory= 3802.998 t= 383 R= 1e+05
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 56 byte, depth reached 7228, errors: 0
- 44157204 states, stored
-4.8641845e+08 states, matched
-5.3057565e+08 transitions (= stored+matched)
-1.8453582e+09 atomic steps
-hash conflicts: 2.8837553e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3537.374 equivalent memory usage for states (stored*(State-vector + overhead))
- 2843.050 actual memory usage for states (compression: 80.37%)
- state-vector as stored = 40 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 3812.568 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, ".input.spin", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 61, "(1)"
- line 417, ".input.spin", state 91, "(1)"
- line 398, ".input.spin", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 158, "(1)"
- line 417, ".input.spin", state 188, "(1)"
- line 398, ".input.spin", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 256, "(1)"
- line 417, ".input.spin", state 286, "(1)"
- line 398, ".input.spin", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 395, "(1)"
- line 417, ".input.spin", state 425, "(1)"
- line 539, ".input.spin", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 398, ".input.spin", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 70, "(1)"
- line 417, ".input.spin", state 100, "(1)"
- line 398, ".input.spin", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 158, "(1)"
- line 417, ".input.spin", state 188, "(1)"
- line 398, ".input.spin", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 247, "(1)"
- line 417, ".input.spin", state 277, "(1)"
- line 398, ".input.spin", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 359, "(1)"
- line 417, ".input.spin", state 389, "(1)"
- line 613, ".input.spin", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 398, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 59, "(1)"
- line 412, ".input.spin", state 72, "(1)"
- line 417, ".input.spin", state 89, "(1)"
- line 398, ".input.spin", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 153, "(1)"
- line 412, ".input.spin", state 166, "(1)"
- line 651, ".input.spin", state 199, "(1)"
- line 174, ".input.spin", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 240, "(1)"
- line 163, ".input.spin", state 248, "(1)"
- line 167, ".input.spin", state 260, "(1)"
- line 174, ".input.spin", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 303, "(1)"
- line 163, ".input.spin", state 311, "(1)"
- line 167, ".input.spin", state 323, "(1)"
- line 174, ".input.spin", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 370, "(1)"
- line 163, ".input.spin", state 378, "(1)"
- line 167, ".input.spin", state 390, "(1)"
- line 398, ".input.spin", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 449, "(1)"
- line 412, ".input.spin", state 462, "(1)"
- line 417, ".input.spin", state 479, "(1)"
- line 398, ".input.spin", state 498, "(1)"
- line 402, ".input.spin", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 554, "(1)"
- line 417, ".input.spin", state 571, "(1)"
- line 402, ".input.spin", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 647, "(1)"
- line 417, ".input.spin", state 664, "(1)"
- line 178, ".input.spin", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 710, "(1)"
- line 163, ".input.spin", state 718, "(1)"
- line 167, ".input.spin", state 730, "(1)"
- line 174, ".input.spin", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 773, "(1)"
- line 163, ".input.spin", state 781, "(1)"
- line 167, ".input.spin", state 793, "(1)"
- line 174, ".input.spin", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 840, "(1)"
- line 163, ".input.spin", state 848, "(1)"
- line 167, ".input.spin", state 860, "(1)"
- line 398, ".input.spin", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 884, "(1)"
- line 398, ".input.spin", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 885, "else"
- line 398, ".input.spin", state 888, "(1)"
- line 402, ".input.spin", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 898, "(1)"
- line 402, ".input.spin", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 899, "else"
- line 402, ".input.spin", state 902, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 400, ".input.spin", state 908, "((i<1))"
- line 400, ".input.spin", state 908, "((i>=1))"
- line 407, ".input.spin", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 927, "(1)"
- line 408, ".input.spin", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, ".input.spin", state 928, "else"
- line 408, ".input.spin", state 931, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 412, ".input.spin", state 940, "(1)"
- line 412, ".input.spin", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, ".input.spin", state 941, "else"
- line 412, ".input.spin", state 944, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 410, ".input.spin", state 950, "((i<1))"
- line 410, ".input.spin", state 950, "((i>=1))"
- line 417, ".input.spin", state 957, "(1)"
- line 417, ".input.spin", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, ".input.spin", state 958, "else"
- line 417, ".input.spin", state 961, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 402, ".input.spin", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1040, "(1)"
- line 417, ".input.spin", state 1057, "(1)"
- line 402, ".input.spin", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1130, "(1)"
- line 417, ".input.spin", state 1147, "(1)"
- line 398, ".input.spin", state 1166, "(1)"
- line 402, ".input.spin", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1222, "(1)"
- line 417, ".input.spin", state 1239, "(1)"
- line 402, ".input.spin", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, ".input.spin", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, ".input.spin", state 1315, "(1)"
- line 417, ".input.spin", state 1332, "(1)"
- line 178, ".input.spin", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1378, "(1)"
- line 163, ".input.spin", state 1386, "(1)"
- line 167, ".input.spin", state 1398, "(1)"
- line 174, ".input.spin", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1441, "(1)"
- line 163, ".input.spin", state 1449, "(1)"
- line 167, ".input.spin", state 1461, "(1)"
- line 174, ".input.spin", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1508, "(1)"
- line 163, ".input.spin", state 1516, "(1)"
- line 167, ".input.spin", state 1528, "(1)"
- line 398, ".input.spin", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 1552, "(1)"
- line 398, ".input.spin", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, ".input.spin", state 1553, "else"
- line 398, ".input.spin", state 1556, "(1)"
- line 402, ".input.spin", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 1566, "(1)"
- line 402, ".input.spin", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, ".input.spin", state 1567, "else"
- line 402, ".input.spin", state 1570, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 400, ".input.spin", state 1576, "((i<1))"
- line 400, ".input.spin", state 1576, "((i>=1))"
- line 407, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, ".input.spin", state 1595, "(1)"
- line 408, ".input.spin", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, ".input.spin", state 1596, "else"
- line 408, ".input.spin", state 1599, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 412, ".input.spin", state 1608, "(1)"
- line 412, ".input.spin", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, ".input.spin", state 1609, "else"
- line 412, ".input.spin", state 1612, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 410, ".input.spin", state 1618, "((i<1))"
- line 410, ".input.spin", state 1618, "((i>=1))"
- line 417, ".input.spin", state 1625, "(1)"
- line 417, ".input.spin", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, ".input.spin", state 1626, "else"
- line 417, ".input.spin", state 1629, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 178, ".input.spin", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1681, "(1)"
- line 163, ".input.spin", state 1689, "(1)"
- line 167, ".input.spin", state 1701, "(1)"
- line 174, ".input.spin", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1744, "(1)"
- line 163, ".input.spin", state 1752, "(1)"
- line 167, ".input.spin", state 1764, "(1)"
- line 174, ".input.spin", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, ".input.spin", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, ".input.spin", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, ".input.spin", state 1811, "(1)"
- line 163, ".input.spin", state 1819, "(1)"
- line 167, ".input.spin", state 1831, "(1)"
- line 701, ".input.spin", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 384 seconds
-pan: rate 114968.77 states/second
-pan: avg transition delay 7.2389e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-Depth= 6837 States= 1e+06 Transitions= 9.03e+06 Memory= 534.904 t= 7.74 R= 1e+05
-Depth= 8887 States= 2e+06 Transitions= 1.88e+07 Memory= 603.557 t= 16.6 R= 1e+05
-Depth= 8887 States= 3e+06 Transitions= 3.14e+07 Memory= 672.209 t= 28 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 8887 States= 4e+06 Transitions= 4.33e+07 Memory= 771.885 t= 39.1 R= 1e+05
-Depth= 8887 States= 5e+06 Transitions= 5.65e+07 Memory= 840.635 t= 50.7 R= 1e+05
-Depth= 8887 States= 6e+06 Transitions= 6.79e+07 Memory= 909.287 t= 61 R= 1e+05
-Depth= 8887 States= 7e+06 Transitions= 8.08e+07 Memory= 977.940 t= 72.6 R= 1e+05
-Depth= 8887 States= 8e+06 Transitions= 9.5e+07 Memory= 1046.592 t= 85.5 R= 9e+04
-Depth= 8887 States= 9e+06 Transitions= 1.07e+08 Memory= 1115.342 t= 96.7 R= 9e+04
-pan: resizing hashtable to -w24.. done
-Depth= 8887 States= 1e+07 Transitions= 1.18e+08 Memory= 1308.088 t= 108 R= 9e+04
-Depth= 8887 States= 1.1e+07 Transitions= 1.3e+08 Memory= 1376.740 t= 119 R= 9e+04
-Depth= 8887 States= 1.2e+07 Transitions= 1.41e+08 Memory= 1445.393 t= 128 R= 9e+04
-Depth= 8887 States= 1.3e+07 Transitions= 1.51e+08 Memory= 1514.045 t= 138 R= 9e+04
-Depth= 8887 States= 1.4e+07 Transitions= 1.64e+08 Memory= 1582.795 t= 149 R= 9e+04
-Depth= 8887 States= 1.5e+07 Transitions= 1.77e+08 Memory= 1651.447 t= 160 R= 9e+04
-Depth= 8887 States= 1.6e+07 Transitions= 1.9e+08 Memory= 1720.100 t= 172 R= 9e+04
-Depth= 8887 States= 1.7e+07 Transitions= 2.02e+08 Memory= 1788.752 t= 183 R= 9e+04
-Depth= 8887 States= 1.8e+07 Transitions= 2.15e+08 Memory= 1857.502 t= 194 R= 9e+04
-Depth= 8887 States= 1.9e+07 Transitions= 2.29e+08 Memory= 1926.154 t= 207 R= 9e+04
-Depth= 8887 States= 2e+07 Transitions= 2.4e+08 Memory= 1994.807 t= 217 R= 9e+04
-Depth= 8887 States= 2.1e+07 Transitions= 2.51e+08 Memory= 2063.459 t= 227 R= 9e+04
-Depth= 8887 States= 2.2e+07 Transitions= 2.63e+08 Memory= 2132.209 t= 238 R= 9e+04
-Depth= 8887 States= 2.3e+07 Transitions= 2.74e+08 Memory= 2200.861 t= 248 R= 9e+04
-Depth= 8887 States= 2.4e+07 Transitions= 2.86e+08 Memory= 2269.514 t= 259 R= 9e+04
-Depth= 8887 States= 2.5e+07 Transitions= 2.98e+08 Memory= 2338.166 t= 270 R= 9e+04
-Depth= 8887 States= 2.6e+07 Transitions= 3.1e+08 Memory= 2406.916 t= 281 R= 9e+04
-Depth= 8887 States= 2.7e+07 Transitions= 3.24e+08 Memory= 2475.568 t= 294 R= 9e+04
-Depth= 8887 States= 2.8e+07 Transitions= 3.36e+08 Memory= 2544.221 t= 305 R= 9e+04
-Depth= 8887 States= 2.9e+07 Transitions= 3.49e+08 Memory= 2612.873 t= 317 R= 9e+04
-Depth= 8887 States= 3e+07 Transitions= 3.63e+08 Memory= 2681.526 t= 329 R= 9e+04
-Depth= 8887 States= 3.1e+07 Transitions= 3.73e+08 Memory= 2750.276 t= 339 R= 9e+04
-Depth= 8887 States= 3.2e+07 Transitions= 3.85e+08 Memory= 2818.928 t= 351 R= 9e+04
-Depth= 8887 States= 3.3e+07 Transitions= 3.97e+08 Memory= 2887.580 t= 362 R= 9e+04
-Depth= 8887 States= 3.4e+07 Transitions= 4.08e+08 Memory= 2956.233 t= 373 R= 9e+04
-pan: resizing hashtable to -w26.. done
-Depth= 8887 States= 3.5e+07 Transitions= 4.2e+08 Memory= 3520.967 t= 391 R= 9e+04
-Depth= 8887 States= 3.6e+07 Transitions= 4.32e+08 Memory= 3589.619 t= 402 R= 9e+04
-Depth= 8887 States= 3.7e+07 Transitions= 4.44e+08 Memory= 3658.272 t= 413 R= 9e+04
-Depth= 8887 States= 3.8e+07 Transitions= 4.58e+08 Memory= 3727.022 t= 425 R= 9e+04
-Depth= 8887 States= 3.9e+07 Transitions= 4.7e+08 Memory= 3795.674 t= 435 R= 9e+04
-Depth= 8887 States= 4e+07 Transitions= 4.83e+08 Memory= 3864.326 t= 447 R= 9e+04
-Depth= 8887 States= 4.1e+07 Transitions= 4.97e+08 Memory= 3932.979 t= 459 R= 9e+04
-Depth= 8887 States= 4.2e+07 Transitions= 5.07e+08 Memory= 4001.729 t= 468 R= 9e+04
-Depth= 8887 States= 4.3e+07 Transitions= 5.19e+08 Memory= 4070.381 t= 479 R= 9e+04
-Depth= 8887 States= 4.4e+07 Transitions= 5.31e+08 Memory= 4139.033 t= 489 R= 9e+04
-Depth= 8887 States= 4.5e+07 Transitions= 5.42e+08 Memory= 4207.686 t= 499 R= 9e+04
-Depth= 8887 States= 4.6e+07 Transitions= 5.54e+08 Memory= 4276.338 t= 510 R= 9e+04
-Depth= 8887 States= 4.7e+07 Transitions= 5.67e+08 Memory= 4345.088 t= 521 R= 9e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 8887, errors: 0
- 47143033 states, stored
-5.2129161e+08 states, matched
-5.6843464e+08 transitions (= stored+matched)
-1.9783052e+09 atomic steps
-hash conflicts: 3.1395137e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4136.237 equivalent memory usage for states (stored*(State-vector + overhead))
- 3385.741 actual memory usage for states (compression: 81.86%)
- state-vector as stored = 47 byte + 28 byte overhead
- 512.000 memory used for hash table (-w26)
- 457.764 memory used for DFS stack (-m10000000)
- 4354.854 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 61, "(1)"
- line 417, "pan.___", state 91, "(1)"
- line 398, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 158, "(1)"
- line 417, "pan.___", state 188, "(1)"
- line 398, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 256, "(1)"
- line 417, "pan.___", state 286, "(1)"
- line 398, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 395, "(1)"
- line 417, "pan.___", state 425, "(1)"
- line 539, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 398, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 70, "(1)"
- line 417, "pan.___", state 100, "(1)"
- line 398, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 158, "(1)"
- line 417, "pan.___", state 188, "(1)"
- line 398, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 247, "(1)"
- line 417, "pan.___", state 277, "(1)"
- line 398, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 359, "(1)"
- line 417, "pan.___", state 389, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 59, "(1)"
- line 412, "pan.___", state 72, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 153, "(1)"
- line 412, "pan.___", state 166, "(1)"
- line 651, "pan.___", state 199, "(1)"
- line 174, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 240, "(1)"
- line 163, "pan.___", state 248, "(1)"
- line 167, "pan.___", state 260, "(1)"
- line 174, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 303, "(1)"
- line 163, "pan.___", state 311, "(1)"
- line 167, "pan.___", state 323, "(1)"
- line 174, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 370, "(1)"
- line 163, "pan.___", state 378, "(1)"
- line 167, "pan.___", state 390, "(1)"
- line 398, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 449, "(1)"
- line 412, "pan.___", state 462, "(1)"
- line 417, "pan.___", state 479, "(1)"
- line 398, "pan.___", state 498, "(1)"
- line 402, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 554, "(1)"
- line 417, "pan.___", state 571, "(1)"
- line 402, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 647, "(1)"
- line 417, "pan.___", state 664, "(1)"
- line 178, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 710, "(1)"
- line 163, "pan.___", state 718, "(1)"
- line 167, "pan.___", state 730, "(1)"
- line 174, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 773, "(1)"
- line 163, "pan.___", state 781, "(1)"
- line 167, "pan.___", state 793, "(1)"
- line 174, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 840, "(1)"
- line 163, "pan.___", state 848, "(1)"
- line 167, "pan.___", state 860, "(1)"
- line 398, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 884, "(1)"
- line 398, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 885, "else"
- line 398, "pan.___", state 888, "(1)"
- line 402, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 899, "else"
- line 402, "pan.___", state 902, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 400, "pan.___", state 908, "((i<1))"
- line 400, "pan.___", state 908, "((i>=1))"
- line 407, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 927, "(1)"
- line 408, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, "pan.___", state 928, "else"
- line 408, "pan.___", state 931, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 412, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, "pan.___", state 941, "else"
- line 412, "pan.___", state 944, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 410, "pan.___", state 950, "((i<1))"
- line 410, "pan.___", state 950, "((i>=1))"
- line 417, "pan.___", state 957, "(1)"
- line 417, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, "pan.___", state 958, "else"
- line 417, "pan.___", state 961, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 402, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1040, "(1)"
- line 417, "pan.___", state 1057, "(1)"
- line 402, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1130, "(1)"
- line 417, "pan.___", state 1147, "(1)"
- line 398, "pan.___", state 1166, "(1)"
- line 402, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1222, "(1)"
- line 417, "pan.___", state 1239, "(1)"
- line 402, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 407, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 412, "pan.___", state 1315, "(1)"
- line 417, "pan.___", state 1332, "(1)"
- line 178, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1378, "(1)"
- line 163, "pan.___", state 1386, "(1)"
- line 167, "pan.___", state 1398, "(1)"
- line 174, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1441, "(1)"
- line 163, "pan.___", state 1449, "(1)"
- line 167, "pan.___", state 1461, "(1)"
- line 174, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1508, "(1)"
- line 163, "pan.___", state 1516, "(1)"
- line 167, "pan.___", state 1528, "(1)"
- line 398, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 1552, "(1)"
- line 398, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 398, "pan.___", state 1553, "else"
- line 398, "pan.___", state 1556, "(1)"
- line 402, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 1566, "(1)"
- line 402, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 402, "pan.___", state 1567, "else"
- line 402, "pan.___", state 1570, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 400, "pan.___", state 1576, "((i<1))"
- line 400, "pan.___", state 1576, "((i>=1))"
- line 407, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1595, "(1)"
- line 408, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 408, "pan.___", state 1596, "else"
- line 408, "pan.___", state 1599, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 412, "pan.___", state 1608, "(1)"
- line 412, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 412, "pan.___", state 1609, "else"
- line 412, "pan.___", state 1612, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 410, "pan.___", state 1618, "((i<1))"
- line 410, "pan.___", state 1618, "((i>=1))"
- line 417, "pan.___", state 1625, "(1)"
- line 417, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 417, "pan.___", state 1626, "else"
- line 417, "pan.___", state 1629, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 178, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1681, "(1)"
- line 163, "pan.___", state 1689, "(1)"
- line 167, "pan.___", state 1701, "(1)"
- line 174, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1744, "(1)"
- line 163, "pan.___", state 1752, "(1)"
- line 167, "pan.___", state 1764, "(1)"
- line 174, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 182, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 159, "pan.___", state 1811, "(1)"
- line 163, "pan.___", state 1819, "(1)"
- line 167, "pan.___", state 1831, "(1)"
- line 701, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 523 seconds
-pan: rate 90149.985 states/second
-pan: avg transition delay 9.1997e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-3:4:4320
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-7:4:4331
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+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-Depth= 6009 States= 1e+06 Transitions= 1.08e+07 Memory= 534.904 t= 9.22 R= 1e+05
-Depth= 6009 States= 2e+06 Transitions= 3.4e+07 Memory= 603.557 t= 31.1 R= 6e+04
-Depth= 7527 States= 3e+06 Transitions= 4.91e+07 Memory= 672.209 t= 45.6 R= 7e+04
-pan: resizing hashtable to -w22.. done
-Depth= 68651 States= 4e+06 Transitions= 6.74e+07 Memory= 772.080 t= 62.9 R= 6e+04
-Depth= 68651 States= 5e+06 Transitions= 8.62e+07 Memory= 840.733 t= 80.2 R= 6e+04
-Depth= 68651 States= 6e+06 Transitions= 1.03e+08 Memory= 909.385 t= 95.7 R= 6e+04
-Depth= 68651 States= 7e+06 Transitions= 1.21e+08 Memory= 978.037 t= 112 R= 6e+04
-Depth= 68651 States= 8e+06 Transitions= 1.37e+08 Memory= 1046.690 t= 128 R= 6e+04
-Depth= 68651 States= 9e+06 Transitions= 1.52e+08 Memory= 1115.440 t= 143 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 68651 States= 1e+07 Transitions= 1.72e+08 Memory= 1308.186 t= 163 R= 6e+04
-Depth= 68651 States= 1.1e+07 Transitions= 1.89e+08 Memory= 1376.838 t= 178 R= 6e+04
-Depth= 68651 States= 1.2e+07 Transitions= 2.05e+08 Memory= 1445.490 t= 193 R= 6e+04
-Depth= 68651 States= 1.3e+07 Transitions= 2.22e+08 Memory= 1514.143 t= 208 R= 6e+04
-Depth= 68651 States= 1.4e+07 Transitions= 2.39e+08 Memory= 1582.893 t= 224 R= 6e+04
-pan: claim violated! (at depth 2141)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 88 byte, depth reached 68651, errors: 1
- 14155711 states, stored
-2.2815817e+08 states, matched
-2.4231388e+08 transitions (= stored+matched)
-8.5461256e+08 atomic steps
-hash conflicts: 1.1483359e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1565.993 equivalent memory usage for states (stored*(State-vector + overhead))
- 1008.042 actual memory usage for states (compression: 64.37%)
- state-vector as stored = 47 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1593.537 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 227, "(1)"
- line 409, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 256, "(1)"
- line 419, "pan.___", state 286, "(1)"
- line 400, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 366, "(1)"
- line 409, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 395, "(1)"
- line 419, "pan.___", state 425, "(1)"
- line 541, "pan.___", state 456, "-end-"
- (19 of 456 states)
-unreached in proctype urcu_reader_sig
- line 400, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 70, "(1)"
- line 419, "pan.___", state 100, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 247, "(1)"
- line 419, "pan.___", state 277, "(1)"
- line 400, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 330, "(1)"
- line 409, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 359, "(1)"
- line 419, "pan.___", state 389, "(1)"
- line 615, "pan.___", state 411, "-end-"
- (18 of 411 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 410, "pan.___", state 153, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 400, "pan.___", state 209, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 223, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 254, "(1)"
- line 414, "pan.___", state 267, "(1)"
- line 400, "pan.___", state 300, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 314, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 345, "(1)"
- line 414, "pan.___", state 358, "(1)"
- line 400, "pan.___", state 395, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 409, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 440, "(1)"
- line 414, "pan.___", state 453, "(1)"
- line 400, "pan.___", state 488, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 533, "(1)"
- line 414, "pan.___", state 546, "(1)"
- line 400, "pan.___", state 582, "(1)"
- line 404, "pan.___", state 594, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 638, "(1)"
- line 404, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 731, "(1)"
- line 404, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 821, "(1)"
- line 419, "pan.___", state 838, "(1)"
- line 404, "pan.___", state 868, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 886, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 912, "(1)"
- line 419, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 963, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 981, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1007, "(1)"
- line 419, "pan.___", state 1024, "(1)"
- line 400, "pan.___", state 1050, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1053, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1053, "else"
- line 400, "pan.___", state 1056, "(1)"
- line 404, "pan.___", state 1064, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1066, "(1)"
- line 404, "pan.___", state 1067, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1067, "else"
- line 404, "pan.___", state 1070, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 402, "pan.___", state 1076, "((i<1))"
- line 402, "pan.___", state 1076, "((i>=1))"
- line 409, "pan.___", state 1082, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1095, "(1)"
- line 410, "pan.___", state 1096, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1096, "else"
- line 410, "pan.___", state 1099, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 414, "pan.___", state 1108, "(1)"
- line 414, "pan.___", state 1109, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1109, "else"
- line 414, "pan.___", state 1112, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 412, "pan.___", state 1118, "((i<1))"
- line 412, "pan.___", state 1118, "((i>=1))"
- line 419, "pan.___", state 1125, "(1)"
- line 419, "pan.___", state 1126, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1126, "else"
- line 419, "pan.___", state 1129, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 404, "pan.___", state 1164, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1208, "(1)"
- line 404, "pan.___", state 1254, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1298, "(1)"
- line 400, "pan.___", state 1334, "(1)"
- line 404, "pan.___", state 1346, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1390, "(1)"
- line 404, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1483, "(1)"
- line 404, "pan.___", state 1529, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1547, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1573, "(1)"
- line 419, "pan.___", state 1590, "(1)"
- line 404, "pan.___", state 1620, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1638, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1664, "(1)"
- line 419, "pan.___", state 1681, "(1)"
- line 404, "pan.___", state 1715, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1733, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1759, "(1)"
- line 419, "pan.___", state 1776, "(1)"
- line 400, "pan.___", state 1802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1804, "(1)"
- line 400, "pan.___", state 1805, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1805, "else"
- line 400, "pan.___", state 1808, "(1)"
- line 404, "pan.___", state 1816, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1818, "(1)"
- line 404, "pan.___", state 1819, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1819, "else"
- line 404, "pan.___", state 1822, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 402, "pan.___", state 1828, "((i<1))"
- line 402, "pan.___", state 1828, "((i>=1))"
- line 409, "pan.___", state 1834, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1847, "(1)"
- line 410, "pan.___", state 1848, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1848, "else"
- line 410, "pan.___", state 1851, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 414, "pan.___", state 1860, "(1)"
- line 414, "pan.___", state 1861, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1861, "else"
- line 414, "pan.___", state 1864, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 412, "pan.___", state 1870, "((i<1))"
- line 412, "pan.___", state 1870, "((i>=1))"
- line 419, "pan.___", state 1877, "(1)"
- line 419, "pan.___", state 1878, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1878, "else"
- line 419, "pan.___", state 1881, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 404, "pan.___", state 1916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1960, "(1)"
- line 404, "pan.___", state 2007, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 2051, "(1)"
- line 404, "pan.___", state 2102, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 2146, "(1)"
- line 703, "pan.___", state 2192, "-end-"
- (144 of 2192 states)
-unreached in proctype :init:
- line 710, "pan.___", state 9, "((j<2))"
- line 710, "pan.___", state 9, "((j>=2))"
- line 711, "pan.___", state 20, "((j<2))"
- line 711, "pan.___", state 20, "((j>=2))"
- line 716, "pan.___", state 33, "((j<2))"
- line 716, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 227 seconds
-pan: rate 62472.797 states/second
-pan: avg transition delay 9.3511e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-2:4:3059
-3:4:3062
-4:4:3062
-5:4:3065
-6:4:3073
-7:4:3073
-8:4:3076
-9:4:3082
-10:4:3086
-11:4:3086
-12:4:3089
-13:4:3097
-14:4:3101
-15:4:3102
-16:0:3107
-17:4:3104
-18:0:3107
-19:3:869
-20:0:3107
-21:3:875
-22:0:3107
-23:3:876
-24:0:3107
-25:3:877
-26:3:881
-27:3:882
-28:3:890
-29:3:891
-30:3:895
-31:3:896
-32:3:904
-33:3:909
-34:3:913
-35:3:914
-36:3:921
-37:3:922
-38:3:933
-39:3:934
-40:3:935
-41:3:946
-42:3:951
-43:3:952
-44:0:3107
-45:3:964
-46:0:3107
-47:3:966
-48:3:967
-49:0:3107
-50:3:971
-51:3:975
-52:3:976
-53:3:984
-54:3:985
-55:3:989
-56:3:990
-57:3:998
-58:3:1003
-59:3:1004
-60:3:1015
-61:3:1016
-62:3:1027
-63:3:1028
-64:3:1029
-65:3:1040
-66:3:1045
-67:3:1046
-68:0:3107
-69:3:1058
-70:0:3107
-71:3:1060
-72:0:3107
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-74:0:3107
-75:3:1071
-76:0:3107
-77:3:1072
-78:3:1076
-79:3:1077
-80:3:1085
-81:3:1086
-82:3:1090
-83:3:1091
-84:3:1099
-85:3:1104
-86:3:1108
-87:3:1109
-88:3:1116
-89:3:1117
-90:3:1128
-91:3:1129
-92:3:1130
-93:3:1141
-94:3:1146
-95:3:1147
-96:0:3107
-97:3:1162
-98:0:3107
-99:3:1163
-100:3:1167
-101:3:1168
-102:3:1176
-103:3:1177
-104:3:1181
-105:3:1182
-106:3:1190
-107:3:1195
-108:3:1199
-109:3:1200
-110:3:1207
-111:3:1208
-112:3:1219
-113:3:1220
-114:3:1221
-115:3:1232
-116:3:1237
-117:3:1238
-118:0:3107
-119:3:1253
-120:0:3107
-121:3:1258
-122:3:1262
-123:3:1263
-124:3:1271
-125:3:1272
-126:3:1276
-127:3:1277
-128:3:1285
-129:3:1290
-130:3:1294
-131:3:1295
-132:3:1302
-133:3:1303
-134:3:1314
-135:3:1315
-136:3:1316
-137:3:1327
-138:3:1332
-139:3:1333
-140:0:3107
-141:3:1348
-142:0:3107
-143:3:1350
-144:0:3107
-145:3:1351
-146:3:1355
-147:3:1356
-148:3:1364
-149:3:1365
-150:3:1369
-151:3:1370
-152:3:1378
-153:3:1383
-154:3:1387
-155:3:1388
-156:3:1395
-157:3:1396
-158:3:1407
-159:3:1408
-160:3:1409
-161:3:1420
-162:3:1425
-163:3:1426
-164:0:3107
-165:3:1438
-166:0:3107
-167:3:1440
-168:0:3107
-169:3:1443
-170:3:1444
-171:3:1456
-172:3:1457
-173:3:1461
-174:3:1462
-175:3:1470
-176:3:1475
-177:3:1479
-178:3:1480
-179:3:1487
-180:3:1488
-181:3:1499
-182:3:1500
-183:3:1501
-184:3:1512
-185:3:1517
-186:3:1518
-187:0:3107
-188:3:1530
-189:0:3107
-190:3:1532
-191:0:3107
-192:3:1533
-193:0:3107
-194:3:1534
-195:0:3107
-196:3:1535
-197:0:3107
-198:3:1536
-199:3:1540
-200:3:1541
-201:3:1549
-202:3:1550
-203:3:1554
-204:3:1555
-205:3:1563
-206:3:1568
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-1923:3:3020
-1924:3:3025
-1925:3:3028
-1926:3:3029
-1927:0:3107
-1928:3:3041
-1929:0:3107
-1930:3:3043
-1931:0:3107
-1932:3:3044
-1933:0:3107
-1934:3:3047
-1935:0:3107
-1936:3:3052
-1937:0:3107
-1938:2:458
-1939:0:3107
-1940:3:3053
-1941:0:3107
-1942:2:464
-1943:0:3107
-1944:3:3052
-1945:0:3107
-1946:2:465
-1947:0:3107
-1948:3:3053
-1949:0:3107
-1950:2:466
-1951:0:3107
-1952:3:3052
-1953:0:3107
-1954:2:467
-1955:0:3107
-1956:3:3053
-1957:0:3107
-1958:1:2
-1959:0:3107
-1960:3:3052
-1961:0:3107
-1962:2:468
-1963:0:3107
-1964:3:3053
-1965:0:3107
-1966:1:8
-1967:0:3107
-1968:3:3052
-1969:0:3107
-1970:2:467
-1971:0:3107
-1972:3:3053
-1973:0:3107
-1974:1:9
-1975:0:3107
-1976:3:3052
-1977:0:3107
-1978:2:468
-1979:0:3107
-1980:3:3053
-1981:0:3107
-1982:1:10
-1983:0:3107
-1984:3:3052
-1985:0:3107
-1986:2:467
-1987:0:3107
-1988:3:3053
-1989:0:3107
-1990:1:11
-1991:0:3107
-1992:3:3052
-1993:0:3107
-1994:2:468
-1995:0:3107
-1996:3:3053
-1997:0:3107
-1998:1:12
-1999:1:16
-2000:1:17
-2001:1:25
-2002:1:26
-2003:1:30
-2004:1:31
-2005:1:39
-2006:1:44
-2007:1:48
-2008:1:49
-2009:1:56
-2010:1:57
-2011:1:68
-2012:1:69
-2013:1:70
-2014:1:81
-2015:1:86
-2016:1:87
-2017:0:3107
-2018:3:3052
-2019:0:3107
-2020:2:467
-2021:0:3107
-2022:3:3053
-2023:0:3107
-2024:1:99
-2025:0:3107
-2026:3:3052
-2027:0:3107
-2028:2:468
-2029:0:3107
-2030:3:3053
-2031:0:3107
-2032:2:469
-2033:0:3107
-2034:3:3052
-2035:0:3107
-2036:2:475
-2037:0:3107
-2038:3:3053
-2039:0:3107
-2040:2:476
-2041:0:3107
-2042:3:3052
-2043:0:3107
-2044:2:477
-2045:2:481
-2046:2:482
-2047:2:490
-2048:2:491
-2049:2:495
-2050:2:496
-2051:2:504
-2052:2:509
-2053:2:513
-2054:2:514
-2055:2:521
-2056:2:522
-2057:2:533
-2058:2:534
-2059:2:535
-2060:2:546
-2061:2:551
-2062:2:552
-2063:0:3107
-2064:3:3053
-2065:0:3107
-2066:2:564
-2067:0:3107
-2068:3:3052
-2069:0:3107
-2070:2:565
-2071:2:569
-2072:2:570
-2073:2:578
-2074:2:579
-2075:2:583
-2076:2:584
-2077:2:592
-2078:2:597
-2079:2:601
-2080:2:602
-2081:2:609
-2082:2:610
-2083:2:621
-2084:2:622
-2085:2:623
-2086:2:634
-2087:2:639
-2088:2:640
-2089:0:3107
-2090:3:3053
-2091:0:3107
-2092:2:652
-2093:0:3107
-2094:3:3052
-2095:0:3107
-2096:2:653
-2097:0:3107
-2098:3:3053
-2099:0:3107
-2100:2:654
-2101:2:658
-2102:2:659
-2103:2:667
-2104:2:668
-2105:2:672
-2106:2:673
-2107:2:681
-2108:2:686
-2109:2:690
-2110:2:691
-2111:2:698
-2112:2:699
-2113:2:710
-2114:2:711
-2115:2:712
-2116:2:723
-2117:2:728
-2118:2:729
-2119:0:3107
-2120:3:3052
-2121:0:3107
-2122:2:741
-2123:0:3107
-2124:3:3053
-2125:0:3107
-2126:2:750
-2127:0:3107
-2128:3:3052
-2129:0:3107
-2130:2:753
-2131:0:3107
-2132:3:3053
-2133:0:3107
-2134:2:758
-2135:0:3107
-2136:3:3052
-2137:0:3107
-2138:2:759
-2139:0:3105
-2140:3:3053
-2141:0:3111
-2142:2:647
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 5678 States= 1e+06 Transitions= 8.21e+06 Memory= 534.904 t= 6.72 R= 1e+05
-Depth= 5678 States= 2e+06 Transitions= 1.6e+07 Memory= 603.557 t= 13.4 R= 1e+05
-Depth= 16003 States= 3e+06 Transitions= 2.49e+07 Memory= 672.209 t= 21.5 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 31043 States= 4e+06 Transitions= 3.44e+07 Memory= 771.983 t= 30.1 R= 1e+05
-Depth= 31043 States= 5e+06 Transitions= 4.41e+07 Memory= 840.635 t= 38.4 R= 1e+05
-Depth= 31043 States= 6e+06 Transitions= 5.25e+07 Memory= 909.287 t= 45.7 R= 1e+05
-Depth= 31043 States= 7e+06 Transitions= 6.12e+07 Memory= 977.940 t= 53.4 R= 1e+05
-Depth= 31043 States= 8e+06 Transitions= 6.95e+07 Memory= 1046.690 t= 60.8 R= 1e+05
-Depth= 31043 States= 9e+06 Transitions= 7.78e+07 Memory= 1115.342 t= 68.5 R= 1e+05
-pan: resizing hashtable to -w24.. done
-Depth= 31043 States= 1e+07 Transitions= 8.68e+07 Memory= 1308.088 t= 77.9 R= 1e+05
-Depth= 31043 States= 1.1e+07 Transitions= 1.01e+08 Memory= 1376.740 t= 90.1 R= 1e+05
-Depth= 31043 States= 1.2e+07 Transitions= 1.13e+08 Memory= 1445.393 t= 101 R= 1e+05
-Depth= 31043 States= 1.3e+07 Transitions= 1.25e+08 Memory= 1514.045 t= 111 R= 1e+05
-Depth= 31043 States= 1.4e+07 Transitions= 1.38e+08 Memory= 1582.795 t= 122 R= 1e+05
-pan: claim violated! (at depth 1774)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 31043, errors: 1
- 14288659 states, stored
-1.2755714e+08 states, matched
-1.418458e+08 transitions (= stored+matched)
-4.6616273e+08 atomic steps
-hash conflicts: 65726574 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1253.659 equivalent memory usage for states (stored*(State-vector + overhead))
- 1017.191 actual memory usage for states (compression: 81.14%)
- state-vector as stored = 47 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1602.619 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 243, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 265, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 291, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 304, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 320, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 334, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 352, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 365, "(1)"
- line 413, "pan.___", state 378, "(1)"
- line 418, "pan.___", state 395, "(1)"
- line 399, "pan.___", state 414, "(1)"
- line 403, "pan.___", state 426, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 444, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 487, "(1)"
- line 403, "pan.___", state 519, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 537, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 563, "(1)"
- line 418, "pan.___", state 580, "(1)"
- line 179, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 629, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 651, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 677, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 690, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 714, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 716, "(1)"
- line 399, "pan.___", state 717, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 717, "else"
- line 399, "pan.___", state 720, "(1)"
- line 403, "pan.___", state 728, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 730, "(1)"
- line 403, "pan.___", state 731, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 731, "else"
- line 403, "pan.___", state 734, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 401, "pan.___", state 740, "((i<1))"
- line 401, "pan.___", state 740, "((i>=1))"
- line 408, "pan.___", state 746, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 759, "(1)"
- line 409, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 760, "else"
- line 409, "pan.___", state 763, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 413, "pan.___", state 772, "(1)"
- line 413, "pan.___", state 773, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 773, "else"
- line 413, "pan.___", state 776, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 411, "pan.___", state 782, "((i<1))"
- line 411, "pan.___", state 782, "((i>=1))"
- line 418, "pan.___", state 789, "(1)"
- line 418, "pan.___", state 790, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 790, "else"
- line 418, "pan.___", state 793, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 403, "pan.___", state 828, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 846, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 872, "(1)"
- line 418, "pan.___", state 889, "(1)"
- line 403, "pan.___", state 918, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 936, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 979, "(1)"
- line 399, "pan.___", state 998, "(1)"
- line 403, "pan.___", state 1010, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1028, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1054, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 403, "pan.___", state 1103, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1121, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1147, "(1)"
- line 418, "pan.___", state 1164, "(1)"
- line 179, "pan.___", state 1187, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1200, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 1213, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1235, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1252, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1261, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1300, "(1)"
- line 399, "pan.___", state 1301, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1301, "else"
- line 399, "pan.___", state 1304, "(1)"
- line 403, "pan.___", state 1312, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1314, "(1)"
- line 403, "pan.___", state 1315, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1315, "else"
- line 403, "pan.___", state 1318, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 401, "pan.___", state 1324, "((i<1))"
- line 401, "pan.___", state 1324, "((i>=1))"
- line 408, "pan.___", state 1330, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1343, "(1)"
- line 409, "pan.___", state 1344, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1344, "else"
- line 409, "pan.___", state 1347, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 413, "pan.___", state 1356, "(1)"
- line 413, "pan.___", state 1357, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1357, "else"
- line 413, "pan.___", state 1360, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 411, "pan.___", state 1366, "((i<1))"
- line 411, "pan.___", state 1366, "((i>=1))"
- line 418, "pan.___", state 1373, "(1)"
- line 418, "pan.___", state 1374, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1374, "else"
- line 418, "pan.___", state 1377, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 179, "pan.___", state 1406, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1419, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 175, "pan.___", state 1432, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1454, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1471, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1480, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1493, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 702, "pan.___", state 1520, "-end-"
- (144 of 1520 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 125 seconds
-pan: rate 114108.44 states/second
-pan: avg transition delay 8.8279e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-4:4:2390
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-1560:3:1891
-1561:3:1895
-1562:3:1896
-1563:3:1903
-1564:3:1904
-1565:3:1915
-1566:3:1916
-1567:3:1917
-1568:3:1928
-1569:3:1933
-1570:3:1934
-1571:0:2435
-1572:3:1946
-1573:0:2435
-1574:3:1948
-1575:0:2435
-1576:3:1949
-1577:0:2435
-1578:3:1950
-1579:0:2435
-1580:3:1951
-1581:0:2435
-1582:3:1952
-1583:3:1956
-1584:3:1957
-1585:3:1965
-1586:3:1966
-1587:3:1970
-1588:3:1971
-1589:3:1979
-1590:3:1984
-1591:3:1988
-1592:3:1989
-1593:3:1996
-1594:3:1997
-1595:3:2008
-1596:3:2009
-1597:3:2010
-1598:3:2021
-1599:3:2026
-1600:3:2027
-1601:0:2435
-1602:3:2039
-1603:0:2435
-1604:3:2152
-1605:0:2435
-1606:3:2250
-1607:0:2435
-1608:3:2251
-1609:0:2435
-1610:3:2255
-1611:0:2435
-1612:3:2264
-1613:3:2265
-1614:3:2269
-1615:3:2273
-1616:3:2274
-1617:3:2278
-1618:3:2286
-1619:3:2287
-1620:0:2435
-1621:3:2295
-1622:0:2435
-1623:3:2299
-1624:3:2300
-1625:3:2304
-1626:3:2308
-1627:3:2309
-1628:3:2313
-1629:3:2321
-1630:3:2322
-1631:0:2435
-1632:3:2330
-1633:0:2435
-1634:3:2338
-1635:3:2339
-1636:3:2343
-1637:3:2347
-1638:3:2348
-1639:3:2352
-1640:3:2360
-1641:3:2361
-1642:0:2435
-1643:3:2369
-1644:0:2435
-1645:3:2371
-1646:0:2435
-1647:3:2372
-1648:0:2435
-1649:3:2375
-1650:0:2435
-1651:3:2380
-1652:0:2435
-1653:2:467
-1654:0:2435
-1655:3:2381
-1656:0:2435
-1657:1:99
-1658:0:2435
-1659:3:2380
-1660:0:2435
-1661:2:468
-1662:0:2435
-1663:3:2381
-1664:0:2435
-1665:2:469
-1666:0:2435
-1667:3:2380
-1668:0:2435
-1669:2:475
-1670:0:2435
-1671:3:2381
-1672:0:2435
-1673:2:476
-1674:0:2435
-1675:3:2380
-1676:0:2435
-1677:2:477
-1678:2:481
-1679:2:482
-1680:2:490
-1681:2:491
-1682:2:495
-1683:2:496
-1684:2:504
-1685:2:509
-1686:2:513
-1687:2:514
-1688:2:521
-1689:2:522
-1690:2:533
-1691:2:534
-1692:2:535
-1693:2:546
-1694:2:558
-1695:2:559
-1696:0:2435
-1697:3:2381
-1698:0:2435
-1699:2:564
-1700:0:2435
-1701:3:2380
-1702:0:2435
-1703:2:565
-1704:2:569
-1705:2:570
-1706:2:578
-1707:2:579
-1708:2:583
-1709:2:584
-1710:2:592
-1711:2:597
-1712:2:601
-1713:2:602
-1714:2:609
-1715:2:610
-1716:2:621
-1717:2:622
-1718:2:623
-1719:2:634
-1720:2:646
-1721:2:647
-1722:0:2435
-1723:3:2381
-1724:0:2435
-1725:2:652
-1726:0:2435
-1727:3:2380
-1728:0:2435
-1729:2:653
-1730:0:2435
-1731:3:2381
-1732:0:2435
-1733:2:654
-1734:2:658
-1735:2:659
-1736:2:667
-1737:2:668
-1738:2:672
-1739:2:673
-1740:2:681
-1741:2:686
-1742:2:690
-1743:2:691
-1744:2:698
-1745:2:699
-1746:2:710
-1747:2:711
-1748:2:712
-1749:2:723
-1750:2:735
-1751:2:736
-1752:0:2435
-1753:3:2380
-1754:0:2435
-1755:2:741
-1756:0:2435
-1757:3:2381
-1758:0:2435
-1759:2:750
-1760:0:2435
-1761:3:2380
-1762:0:2435
-1763:2:753
-1764:0:2435
-1765:3:2381
-1766:0:2435
-1767:2:758
-1768:0:2435
-1769:3:2380
-1770:0:2435
-1771:2:759
-1772:0:2433
-1773:3:2381
-1774:0:2439
-1775:0:2435
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 10656 States= 1e+06 Transitions= 8.86e+06 Memory= 534.807 t= 7.38 R= 1e+05
-Depth= 35214 States= 2e+06 Transitions= 1.82e+07 Memory= 603.557 t= 15.5 R= 1e+05
-Depth= 35214 States= 3e+06 Transitions= 2.73e+07 Memory= 672.209 t= 23.8 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 35214 States= 4e+06 Transitions= 4.08e+07 Memory= 771.885 t= 35.9 R= 1e+05
-pan: claim violated! (at depth 1650)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 35214, errors: 1
- 4154272 states, stored
- 38595853 states, matched
- 42750125 transitions (= stored+matched)
-1.4058824e+08 atomic steps
-hash conflicts: 21492325 (resolved)
-
-Stats on memory usage (in Megabytes):
- 364.488 equivalent memory usage for states (stored*(State-vector + overhead))
- 292.863 actual memory usage for states (compression: 80.35%)
- state-vector as stored = 46 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 782.529 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 227, "(1)"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 366, "(1)"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (19 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 330, "(1)"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (18 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 401, "pan.___", state 134, "((i<1))"
- line 401, "pan.___", state 134, "((i>=1))"
- line 409, "pan.___", state 153, "(1)"
- line 409, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 154, "else"
- line 409, "pan.___", state 157, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 413, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 167, "else"
- line 413, "pan.___", state 170, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 411, "pan.___", state 176, "((i<1))"
- line 411, "pan.___", state 176, "((i>=1))"
- line 418, "pan.___", state 183, "(1)"
- line 418, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 184, "else"
- line 418, "pan.___", state 187, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 369, "pan.___", state 193, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 646, "pan.___", state 202, "((write_lock==0))"
- line 646, "pan.___", state 202, "else"
- line 644, "pan.___", state 203, "(1)"
- line 160, "pan.___", state 209, "(1)"
- line 164, "pan.___", state 217, "(1)"
- line 164, "pan.___", state 218, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 164, "pan.___", state 218, "else"
- line 162, "pan.___", state 223, "((j<1))"
- line 162, "pan.___", state 223, "((j>=1))"
- line 168, "pan.___", state 229, "(1)"
- line 168, "pan.___", state 230, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 168, "pan.___", state 230, "else"
- line 160, "pan.___", state 241, "(1)"
- line 168, "pan.___", state 261, "(1)"
- line 160, "pan.___", state 277, "(1)"
- line 164, "pan.___", state 285, "(1)"
- line 168, "pan.___", state 297, "(1)"
- line 399, "pan.___", state 311, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 325, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 343, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 356, "(1)"
- line 413, "pan.___", state 369, "(1)"
- line 418, "pan.___", state 386, "(1)"
- line 399, "pan.___", state 405, "(1)"
- line 403, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 461, "(1)"
- line 418, "pan.___", state 478, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 164, "pan.___", state 594, "(1)"
- line 168, "pan.___", state 606, "(1)"
- line 160, "pan.___", state 618, "(1)"
- line 168, "pan.___", state 638, "(1)"
- line 164, "pan.___", state 662, "(1)"
- line 168, "pan.___", state 674, "(1)"
- line 399, "pan.___", state 696, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 698, "(1)"
- line 399, "pan.___", state 699, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 699, "else"
- line 399, "pan.___", state 702, "(1)"
- line 403, "pan.___", state 710, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 712, "(1)"
- line 403, "pan.___", state 713, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 713, "else"
- line 403, "pan.___", state 716, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 401, "pan.___", state 722, "((i<1))"
- line 401, "pan.___", state 722, "((i>=1))"
- line 408, "pan.___", state 728, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 741, "(1)"
- line 409, "pan.___", state 742, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 742, "else"
- line 409, "pan.___", state 745, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 413, "pan.___", state 754, "(1)"
- line 413, "pan.___", state 755, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 755, "else"
- line 413, "pan.___", state 758, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 411, "pan.___", state 764, "((i<1))"
- line 411, "pan.___", state 764, "((i>=1))"
- line 418, "pan.___", state 771, "(1)"
- line 418, "pan.___", state 772, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 772, "else"
- line 418, "pan.___", state 775, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 403, "pan.___", state 810, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 828, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 854, "(1)"
- line 418, "pan.___", state 871, "(1)"
- line 403, "pan.___", state 900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 918, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 944, "(1)"
- line 418, "pan.___", state 961, "(1)"
- line 399, "pan.___", state 980, "(1)"
- line 403, "pan.___", state 992, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1010, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1036, "(1)"
- line 418, "pan.___", state 1053, "(1)"
- line 403, "pan.___", state 1085, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1103, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1129, "(1)"
- line 418, "pan.___", state 1146, "(1)"
- line 164, "pan.___", state 1169, "(1)"
- line 168, "pan.___", state 1181, "(1)"
- line 160, "pan.___", state 1193, "(1)"
- line 168, "pan.___", state 1213, "(1)"
- line 164, "pan.___", state 1237, "(1)"
- line 168, "pan.___", state 1249, "(1)"
- line 399, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1273, "(1)"
- line 399, "pan.___", state 1274, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1274, "else"
- line 399, "pan.___", state 1277, "(1)"
- line 403, "pan.___", state 1285, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1287, "(1)"
- line 403, "pan.___", state 1288, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1288, "else"
- line 403, "pan.___", state 1291, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 401, "pan.___", state 1297, "((i<1))"
- line 401, "pan.___", state 1297, "((i>=1))"
- line 408, "pan.___", state 1303, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1316, "(1)"
- line 409, "pan.___", state 1317, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1317, "else"
- line 409, "pan.___", state 1320, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 413, "pan.___", state 1329, "(1)"
- line 413, "pan.___", state 1330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1330, "else"
- line 413, "pan.___", state 1333, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 411, "pan.___", state 1339, "((i<1))"
- line 411, "pan.___", state 1339, "((i>=1))"
- line 418, "pan.___", state 1346, "(1)"
- line 418, "pan.___", state 1347, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1347, "else"
- line 418, "pan.___", state 1350, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 164, "pan.___", state 1379, "(1)"
- line 168, "pan.___", state 1391, "(1)"
- line 160, "pan.___", state 1403, "(1)"
- line 168, "pan.___", state 1423, "(1)"
- line 164, "pan.___", state 1447, "(1)"
- line 168, "pan.___", state 1459, "(1)"
- line 702, "pan.___", state 1484, "-end-"
- (160 of 1484 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 37.6 seconds
-pan: rate 110515.35 states/second
-pan: avg transition delay 8.793e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-1646:0:2399
-1647:2:759
-1648:0:2397
-1649:3:2345
-1650:0:2403
-1651:2:518
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 8352 States= 1e+06 Transitions= 1.05e+07 Memory= 534.807 t= 8.93 R= 1e+05
-pan: claim violated! (at depth 1352)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 8352, errors: 1
- 1456373 states, stored
- 13442538 states, matched
- 14898911 transitions (= stored+matched)
- 50580660 atomic steps
-hash conflicts: 5166006 (resolved)
-
-Stats on memory usage (in Megabytes):
- 127.779 equivalent memory usage for states (stored*(State-vector + overhead))
- 100.443 actual memory usage for states (compression: 78.61%)
- state-vector as stored = 44 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 566.154 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 179, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1003, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1013, "(1)"
- line 164, "pan.___", state 1021, "(1)"
- line 168, "pan.___", state 1033, "(1)"
- line 175, "pan.___", state 1044, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1066, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1076, "(1)"
- line 164, "pan.___", state 1084, "(1)"
- line 168, "pan.___", state 1096, "(1)"
- line 175, "pan.___", state 1111, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1133, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1143, "(1)"
- line 164, "pan.___", state 1151, "(1)"
- line 168, "pan.___", state 1163, "(1)"
- line 702, "pan.___", state 1188, "-end-"
- (100 of 1188 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 12.8 seconds
-pan: rate 113424.69 states/second
-pan: avg transition delay 8.6181e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-3:4:2058
-4:4:2058
-5:4:2061
-6:4:2069
-7:4:2069
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-11:4:2082
-12:4:2085
-13:4:2093
-14:4:2097
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-16:0:2103
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-22:0:2103
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-30:3:895
-31:3:896
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-33:3:909
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-36:3:921
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-59:3:1004
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-249:3:2001
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-251:3:2013
-252:3:2014
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-272:3:909
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-274:3:914
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-276:3:922
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-291:3:976
-292:3:984
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-304:3:1040
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-331:0:2103
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-334:3:1143
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-350:3:1210
-351:3:1214
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-1246:3:1415
-1247:3:1416
-1248:3:1417
-1249:3:1428
-1250:3:1433
-1251:3:1434
-1252:0:2103
-1253:3:1446
-1254:0:2103
-1255:3:1448
-1256:0:2103
-1257:3:1449
-1258:0:2103
-1259:3:1450
-1260:0:2103
-1261:3:1451
-1262:0:2103
-1263:3:1452
-1264:3:1456
-1265:3:1457
-1266:3:1465
-1267:3:1466
-1268:3:1470
-1269:3:1471
-1270:3:1479
-1271:3:1484
-1272:3:1488
-1273:3:1489
-1274:3:1496
-1275:3:1497
-1276:3:1508
-1277:3:1509
-1278:3:1510
-1279:3:1521
-1280:3:1526
-1281:3:1527
-1282:0:2103
-1283:3:1539
-1284:0:2103
-1285:3:1736
-1286:0:2103
-1287:3:1834
-1288:0:2103
-1289:3:1835
-1290:0:2103
-1291:3:1839
-1292:0:2103
-1293:3:1848
-1294:3:1849
-1295:3:1853
-1296:3:1857
-1297:3:1858
-1298:3:1862
-1299:3:1870
-1300:3:1871
-1301:3:1876
-1302:3:1883
-1303:3:1884
-1304:3:1891
-1305:3:1896
-1306:0:2103
-1307:3:1907
-1308:0:2103
-1309:3:1911
-1310:3:1912
-1311:3:1916
-1312:3:1920
-1313:3:1921
-1314:3:1925
-1315:3:1933
-1316:3:1934
-1317:3:1939
-1318:3:1946
-1319:3:1947
-1320:3:1954
-1321:3:1959
-1322:0:2103
-1323:3:1970
-1324:0:2103
-1325:3:1978
-1326:3:1979
-1327:3:1983
-1328:3:1987
-1329:3:1988
-1330:3:1992
-1331:3:2000
-1332:3:2001
-1333:3:2006
-1334:3:2013
-1335:3:2014
-1336:3:2021
-1337:3:2026
-1338:0:2103
-1339:3:2037
-1340:0:2103
-1341:3:2039
-1342:0:2103
-1343:3:2040
-1344:0:2103
-1345:3:2043
-1346:0:2103
-1347:3:2048
-1348:0:2103
-1349:2:759
-1350:0:2101
-1351:3:2049
-1352:0:2107
-1353:3:1181
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1803: Claim reached state 9 (line 748)
-Depth= 5838 States= 1e+06 Transitions= 1.06e+07 Memory= 494.865 t= 9.24 R= 1e+05
-Depth= 5838 States= 2e+06 Transitions= 1.97e+07 Memory= 532.658 t= 17.7 R= 1e+05
-Depth= 5838 States= 3e+06 Transitions= 3.15e+07 Memory= 555.315 t= 28.4 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 6855 States= 4e+06 Transitions= 4.32e+07 Memory= 613.096 t= 39.1 R= 1e+05
-Depth= 9059 States= 5e+06 Transitions= 5.48e+07 Memory= 642.295 t= 49.5 R= 1e+05
-Depth= 9059 States= 6e+06 Transitions= 6.91e+07 Memory= 672.178 t= 62.5 R= 1e+05
-Depth= 9059 States= 7e+06 Transitions= 7.99e+07 Memory= 706.455 t= 72.5 R= 1e+05
-Depth= 9059 States= 8e+06 Transitions= 9.23e+07 Memory= 735.752 t= 84 R= 1e+05
-Depth= 9059 States= 9e+06 Transitions= 1.04e+08 Memory= 766.318 t= 94.5 R= 1e+05
-pan: resizing hashtable to -w24.. done
-Depth= 9059 States= 1e+07 Transitions= 1.16e+08 Memory= 920.002 t= 106 R= 9e+04
-Depth= 9059 States= 1.1e+07 Transitions= 1.3e+08 Memory= 945.002 t= 119 R= 9e+04
-Depth= 9059 States= 1.2e+07 Transitions= 1.54e+08 Memory= 967.756 t= 140 R= 9e+04
-Depth= 9059 States= 1.3e+07 Transitions= 1.72e+08 Memory= 995.002 t= 157 R= 8e+04
-Depth= 9059 States= 1.4e+07 Transitions= 1.92e+08 Memory= 1022.736 t= 175 R= 8e+04
-Depth= 9059 States= 1.5e+07 Transitions= 2.1e+08 Memory= 1050.080 t= 191 R= 8e+04
-Depth= 9059 States= 1.6e+07 Transitions= 2.22e+08 Memory= 1082.502 t= 203 R= 8e+04
-Depth= 9059 States= 1.7e+07 Transitions= 2.41e+08 Memory= 1108.479 t= 219 R= 8e+04
-Depth= 9059 States= 1.8e+07 Transitions= 2.58e+08 Memory= 1134.455 t= 235 R= 8e+04
-Depth= 9059 States= 1.9e+07 Transitions= 2.7e+08 Memory= 1164.533 t= 246 R= 8e+04
-Depth= 9059 States= 2e+07 Transitions= 2.83e+08 Memory= 1193.830 t= 258 R= 8e+04
-Depth= 9059 States= 2.1e+07 Transitions= 3.03e+08 Memory= 1219.026 t= 276 R= 8e+04
-Depth= 9059 States= 2.2e+07 Transitions= 3.19e+08 Memory= 1248.420 t= 291 R= 8e+04
-Depth= 9059 States= 2.3e+07 Transitions= 3.42e+08 Memory= 1271.858 t= 312 R= 7e+04
-Depth= 9059 States= 2.4e+07 Transitions= 3.6e+08 Memory= 1298.908 t= 328 R= 7e+04
-Depth= 9059 States= 2.5e+07 Transitions= 3.84e+08 Memory= 1323.127 t= 350 R= 7e+04
-Depth= 9059 States= 2.6e+07 Transitions= 4e+08 Memory= 1348.518 t= 365 R= 7e+04
-Depth= 9059 States= 2.7e+07 Transitions= 4.16e+08 Memory= 1379.865 t= 380 R= 7e+04
-Depth= 9059 States= 2.8e+07 Transitions= 4.26e+08 Memory= 1411.115 t= 389 R= 7e+04
-Depth= 9059 States= 2.9e+07 Transitions= 4.42e+08 Memory= 1439.631 t= 404 R= 7e+04
-Depth= 9059 States= 3e+07 Transitions= 4.64e+08 Memory= 1462.385 t= 423 R= 7e+04
-Depth= 9059 States= 3.1e+07 Transitions= 4.82e+08 Memory= 1490.998 t= 439 R= 7e+04
-Depth= 9059 States= 3.2e+07 Transitions= 4.99e+08 Memory= 1519.514 t= 456 R= 7e+04
-Depth= 9059 States= 3.3e+07 Transitions= 5.18e+08 Memory= 1545.393 t= 473 R= 7e+04
-Depth= 9059 States= 3.4e+07 Transitions= 5.33e+08 Memory= 1578.108 t= 486 R= 7e+04
-pan: resizing hashtable to -w26.. done
-Depth= 9059 States= 3.5e+07 Transitions= 5.49e+08 Memory= 2098.994 t= 504 R= 7e+04
-Depth= 9059 States= 3.6e+07 Transitions= 5.74e+08 Memory= 2121.651 t= 528 R= 7e+04
-Depth= 9059 States= 3.7e+07 Transitions= 5.96e+08 Memory= 2147.334 t= 547 R= 7e+04
-Depth= 9059 States= 3.8e+07 Transitions= 6.17e+08 Memory= 2170.186 t= 567 R= 7e+04
-Depth= 9059 States= 3.9e+07 Transitions= 6.3e+08 Memory= 2199.776 t= 578 R= 7e+04
-Depth= 9059 States= 4e+07 Transitions= 6.53e+08 Memory= 2225.459 t= 599 R= 7e+04
-Depth= 9059 States= 4.1e+07 Transitions= 6.69e+08 Memory= 2250.361 t= 614 R= 7e+04
-Depth= 9059 States= 4.2e+07 Transitions= 6.85e+08 Memory= 2279.268 t= 628 R= 7e+04
-Depth= 9059 States= 4.3e+07 Transitions= 7.03e+08 Memory= 2304.463 t= 644 R= 7e+04
-Depth= 9059 States= 4.4e+07 Transitions= 7.13e+08 Memory= 2338.252 t= 654 R= 7e+04
-Depth= 9059 States= 4.5e+07 Transitions= 7.25e+08 Memory= 2366.768 t= 665 R= 7e+04
-Depth= 9059 States= 4.6e+07 Transitions= 7.41e+08 Memory= 2393.330 t= 679 R= 7e+04
-Depth= 9059 States= 4.7e+07 Transitions= 7.57e+08 Memory= 2420.381 t= 694 R= 7e+04
-Depth= 9059 States= 4.8e+07 Transitions= 7.72e+08 Memory= 2447.041 t= 708 R= 7e+04
-Depth= 9059 States= 4.9e+07 Transitions= 7.88e+08 Memory= 2476.143 t= 722 R= 7e+04
-Depth= 9059 States= 5e+07 Transitions= 8.04e+08 Memory= 2501.045 t= 737 R= 7e+04
-Depth= 9059 States= 5.1e+07 Transitions= 8.2e+08 Memory= 2530.440 t= 752 R= 7e+04
-Depth= 9059 States= 5.2e+07 Transitions= 8.37e+08 Memory= 2554.854 t= 766 R= 7e+04
-Depth= 9059 States= 5.3e+07 Transitions= 8.5e+08 Memory= 2583.467 t= 779 R= 7e+04
-Depth= 9059 States= 5.4e+07 Transitions= 8.66e+08 Memory= 2611.299 t= 794 R= 7e+04
-Depth= 9059 States= 5.5e+07 Transitions= 8.79e+08 Memory= 2640.791 t= 805 R= 7e+04
-Depth= 9059 States= 5.6e+07 Transitions= 8.9e+08 Memory= 2672.139 t= 815 R= 7e+04
-Depth= 9059 States= 5.7e+07 Transitions= 9.05e+08 Memory= 2702.705 t= 829 R= 7e+04
-Depth= 9059 States= 5.8e+07 Transitions= 9.22e+08 Memory= 2727.998 t= 845 R= 7e+04
-Depth= 9059 States= 5.9e+07 Transitions= 9.38e+08 Memory= 2754.463 t= 859 R= 7e+04
-Depth= 9059 States= 6e+07 Transitions= 9.49e+08 Memory= 2789.717 t= 870 R= 7e+04
-Depth= 9059 States= 6.1e+07 Transitions= 9.62e+08 Memory= 2817.744 t= 881 R= 7e+04
-Depth= 9059 States= 6.2e+07 Transitions= 9.79e+08 Memory= 2838.447 t= 896 R= 7e+04
-Depth= 9059 States= 6.3e+07 Transitions= 1e+09 Memory= 2863.154 t= 919 R= 7e+04
-Depth= 9059 States= 6.4e+07 Transitions= 1.02e+09 Memory= 2889.131 t= 936 R= 7e+04
-Depth= 9059 States= 6.5e+07 Transitions= 1.04e+09 Memory= 2919.502 t= 952 R= 7e+04
-Depth= 9059 States= 6.6e+07 Transitions= 1.06e+09 Memory= 2943.916 t= 968 R= 7e+04
-Depth= 9059 States= 6.7e+07 Transitions= 1.07e+09 Memory= 2978.975 t= 979 R= 7e+04
-Depth= 9059 States= 6.8e+07 Transitions= 1.09e+09 Memory= 3003.877 t= 996 R= 7e+04
-Depth= 9059 States= 6.9e+07 Transitions= 1.11e+09 Memory= 3028.584 t= 1.01e+03 R= 7e+04
-Depth= 9059 States= 7e+07 Transitions= 1.12e+09 Memory= 3058.174 t= 1.02e+03 R= 7e+04
-Depth= 9059 States= 7.1e+07 Transitions= 1.13e+09 Memory= 3088.350 t= 1.04e+03 R= 7e+04
-Depth= 9059 States= 7.2e+07 Transitions= 1.15e+09 Memory= 3113.350 t= 1.05e+03 R= 7e+04
-Depth= 9059 States= 7.3e+07 Transitions= 1.17e+09 Memory= 3142.158 t= 1.07e+03 R= 7e+04
-Depth= 9059 States= 7.4e+07 Transitions= 1.19e+09 Memory= 3166.279 t= 1.09e+03 R= 7e+04
-Depth= 9059 States= 7.5e+07 Transitions= 1.21e+09 Memory= 3192.744 t= 1.11e+03 R= 7e+04
-Depth= 9059 States= 7.6e+07 Transitions= 1.23e+09 Memory= 3217.256 t= 1.13e+03 R= 7e+04
-Depth= 9059 States= 7.7e+07 Transitions= 1.25e+09 Memory= 3242.549 t= 1.14e+03 R= 7e+04
-Depth= 9059 States= 7.8e+07 Transitions= 1.26e+09 Memory= 3273.115 t= 1.16e+03 R= 7e+04
-Depth= 9059 States= 7.9e+07 Transitions= 1.27e+09 Memory= 3303.975 t= 1.17e+03 R= 7e+04
-Depth= 9059 States= 8e+07 Transitions= 1.29e+09 Memory= 3334.541 t= 1.18e+03 R= 7e+04
-Depth= 9059 States= 8.1e+07 Transitions= 1.31e+09 Memory= 3356.221 t= 1.2e+03 R= 7e+04
-Depth= 9059 States= 8.2e+07 Transitions= 1.33e+09 Memory= 3385.127 t= 1.22e+03 R= 7e+04
-Depth= 9059 States= 8.3e+07 Transitions= 1.35e+09 Memory= 3412.959 t= 1.23e+03 R= 7e+04
-Depth= 9059 States= 8.4e+07 Transitions= 1.37e+09 Memory= 3438.936 t= 1.25e+03 R= 7e+04
-Depth= 9059 States= 8.5e+07 Transitions= 1.38e+09 Memory= 3471.455 t= 1.26e+03 R= 7e+04
-Depth= 9059 States= 8.6e+07 Transitions= 1.4e+09 Memory= 3498.115 t= 1.28e+03 R= 7e+04
-Depth= 9059 States= 8.7e+07 Transitions= 1.42e+09 Memory= 3519.014 t= 1.3e+03 R= 7e+04
-Depth= 9059 States= 8.8e+07 Transitions= 1.44e+09 Memory= 3546.162 t= 1.32e+03 R= 7e+04
-Depth= 9059 States= 8.9e+07 Transitions= 1.46e+09 Memory= 3567.842 t= 1.34e+03 R= 7e+04
-Depth= 9059 States= 9e+07 Transitions= 1.48e+09 Memory= 3598.799 t= 1.35e+03 R= 7e+04
-Depth= 9059 States= 9.1e+07 Transitions= 1.5e+09 Memory= 3622.920 t= 1.37e+03 R= 7e+04
-Depth= 9059 States= 9.2e+07 Transitions= 1.52e+09 Memory= 3648.701 t= 1.39e+03 R= 7e+04
-Depth= 9059 States= 9.3e+07 Transitions= 1.53e+09 Memory= 3676.045 t= 1.4e+03 R= 7e+04
-Depth= 9059 States= 9.4e+07 Transitions= 1.55e+09 Memory= 3702.412 t= 1.42e+03 R= 7e+04
-Depth= 9059 States= 9.5e+07 Transitions= 1.56e+09 Memory= 3735.713 t= 1.43e+03 R= 7e+04
-Depth= 9059 States= 9.6e+07 Transitions= 1.57e+09 Memory= 3764.522 t= 1.44e+03 R= 7e+04
-Depth= 9059 States= 9.7e+07 Transitions= 1.59e+09 Memory= 3790.693 t= 1.45e+03 R= 7e+04
-Depth= 9059 States= 9.8e+07 Transitions= 1.61e+09 Memory= 3817.940 t= 1.47e+03 R= 7e+04
-Depth= 9059 States= 9.9e+07 Transitions= 1.62e+09 Memory= 3845.283 t= 1.48e+03 R= 7e+04
-Depth= 9059 States= 1e+08 Transitions= 1.64e+09 Memory= 3873.213 t= 1.5e+03 R= 7e+04
-Depth= 9059 States= 1.01e+08 Transitions= 1.65e+09 Memory= 3897.920 t= 1.51e+03 R= 7e+04
-Depth= 9059 States= 1.02e+08 Transitions= 1.67e+09 Memory= 3926.631 t= 1.53e+03 R= 7e+04
-Depth= 9059 States= 1.03e+08 Transitions= 1.68e+09 Memory= 3952.315 t= 1.54e+03 R= 7e+04
-Depth= 9059 States= 1.04e+08 Transitions= 1.7e+09 Memory= 3981.026 t= 1.56e+03 R= 7e+04
-Depth= 9059 States= 1.05e+08 Transitions= 1.71e+09 Memory= 4010.029 t= 1.57e+03 R= 7e+04
-Depth= 9059 States= 1.06e+08 Transitions= 1.73e+09 Memory= 4038.838 t= 1.58e+03 R= 7e+04
-Depth= 9059 States= 1.07e+08 Transitions= 1.74e+09 Memory= 4070.381 t= 1.59e+03 R= 7e+04
-Depth= 9059 States= 1.08e+08 Transitions= 1.75e+09 Memory= 4099.385 t= 1.61e+03 R= 7e+04
-Depth= 9059 States= 1.09e+08 Transitions= 1.77e+09 Memory= 4126.338 t= 1.62e+03 R= 7e+04
-Depth= 9059 States= 1.1e+08 Transitions= 1.79e+09 Memory= 4151.924 t= 1.64e+03 R= 7e+04
-Depth= 9059 States= 1.11e+08 Transitions= 1.8e+09 Memory= 4187.276 t= 1.65e+03 R= 7e+04
-Depth= 9059 States= 1.12e+08 Transitions= 1.81e+09 Memory= 4214.326 t= 1.66e+03 R= 7e+04
-Depth= 9059 States= 1.13e+08 Transitions= 1.83e+09 Memory= 4237.471 t= 1.67e+03 R= 7e+04
-Depth= 9059 States= 1.14e+08 Transitions= 1.85e+09 Memory= 4261.104 t= 1.7e+03 R= 7e+04
-Depth= 9059 States= 1.15e+08 Transitions= 1.87e+09 Memory= 4286.690 t= 1.71e+03 R= 7e+04
-Depth= 9059 States= 1.16e+08 Transitions= 1.89e+09 Memory= 4314.619 t= 1.73e+03 R= 7e+04
-Depth= 9059 States= 1.17e+08 Transitions= 1.91e+09 Memory= 4341.768 t= 1.75e+03 R= 7e+04
-Depth= 9059 States= 1.18e+08 Transitions= 1.92e+09 Memory= 4375.166 t= 1.76e+03 R= 7e+04
-Depth= 9059 States= 1.19e+08 Transitions= 1.94e+09 Memory= 4401.338 t= 1.78e+03 R= 7e+04
-Depth= 9059 States= 1.2e+08 Transitions= 1.95e+09 Memory= 4426.436 t= 1.79e+03 R= 7e+04
-Depth= 9059 States= 1.21e+08 Transitions= 1.97e+09 Memory= 4456.807 t= 1.8e+03 R= 7e+04
-Depth= 9059 States= 1.22e+08 Transitions= 1.98e+09 Memory= 4486.592 t= 1.82e+03 R= 7e+04
-Depth= 9059 States= 1.23e+08 Transitions= 2e+09 Memory= 4511.787 t= 1.83e+03 R= 7e+04
-Depth= 9059 States= 1.24e+08 Transitions= 2.02e+09 Memory= 4540.108 t= 1.85e+03 R= 7e+04
-Depth= 9059 States= 1.25e+08 Transitions= 2.04e+09 Memory= 4564.033 t= 1.87e+03 R= 7e+04
-Depth= 9059 States= 1.26e+08 Transitions= 2.06e+09 Memory= 4591.865 t= 1.89e+03 R= 7e+04
-Depth= 9059 States= 1.27e+08 Transitions= 2.08e+09 Memory= 4615.889 t= 1.91e+03 R= 7e+04
-Depth= 9059 States= 1.28e+08 Transitions= 2.1e+09 Memory= 4640.303 t= 1.92e+03 R= 7e+04
-Depth= 9059 States= 1.29e+08 Transitions= 2.11e+09 Memory= 4670.479 t= 1.94e+03 R= 7e+04
-Depth= 9059 States= 1.3e+08 Transitions= 2.12e+09 Memory= 4702.998 t= 1.95e+03 R= 7e+04
-Depth= 9059 States= 1.31e+08 Transitions= 2.14e+09 Memory= 4732.393 t= 1.96e+03 R= 7e+04
-Depth= 9059 States= 1.32e+08 Transitions= 2.16e+09 Memory= 4754.756 t= 1.98e+03 R= 7e+04
-Depth= 9059 States= 1.33e+08 Transitions= 2.18e+09 Memory= 4783.174 t= 2e+03 R= 7e+04
-Depth= 9059 States= 1.34e+08 Transitions= 2.19e+09 Memory= 4810.518 t= 2.01e+03 R= 7e+04
-Depth= 9059 States= 1.35e+08 Transitions= 2.21e+09 Memory= 4837.568 t= 2.03e+03 R= 7e+04
-pan: resizing hashtable to -w28.. done
-Depth= 9059 States= 1.36e+08 Transitions= 2.23e+09 Memory= 6885.568 t= 2.06e+03 R= 7e+04
-Depth= 9059 States= 1.37e+08 Transitions= 2.24e+09 Memory= 6885.568 t= 2.08e+03 R= 7e+04
-Depth= 9059 States= 1.38e+08 Transitions= 2.27e+09 Memory= 6900.412 t= 2.1e+03 R= 7e+04
-Depth= 9059 States= 1.39e+08 Transitions= 2.29e+09 Memory= 6927.658 t= 2.12e+03 R= 7e+04
-Depth= 9059 States= 1.4e+08 Transitions= 2.31e+09 Memory= 6950.315 t= 2.14e+03 R= 7e+04
-Depth= 9059 States= 1.41e+08 Transitions= 2.33e+09 Memory= 6981.858 t= 2.15e+03 R= 7e+04
-Depth= 9059 States= 1.42e+08 Transitions= 2.35e+09 Memory= 7005.295 t= 2.17e+03 R= 7e+04
-Depth= 9059 States= 1.43e+08 Transitions= 2.36e+09 Memory= 7031.076 t= 2.18e+03 R= 7e+04
-Depth= 9059 States= 1.44e+08 Transitions= 2.38e+09 Memory= 7056.955 t= 2.2e+03 R= 7e+04
-Depth= 9059 States= 1.45e+08 Transitions= 2.4e+09 Memory= 7084.494 t= 2.22e+03 R= 7e+04
-Depth= 9059 States= 1.46e+08 Transitions= 2.41e+09 Memory= 7115.744 t= 2.23e+03 R= 7e+04
-Depth= 9059 States= 1.47e+08 Transitions= 2.42e+09 Memory= 7146.604 t= 2.24e+03 R= 7e+04
-Depth= 9059 States= 1.48e+08 Transitions= 2.44e+09 Memory= 7172.287 t= 2.25e+03 R= 7e+04
-Depth= 9059 States= 1.49e+08 Transitions= 2.45e+09 Memory= 7200.315 t= 2.26e+03 R= 7e+04
-Depth= 9059 States= 1.5e+08 Transitions= 2.47e+09 Memory= 7226.389 t= 2.28e+03 R= 7e+04
-Depth= 9059 States= 1.51e+08 Transitions= 2.48e+09 Memory= 7253.733 t= 2.29e+03 R= 7e+04
-Depth= 9059 States= 1.52e+08 Transitions= 2.5e+09 Memory= 7279.709 t= 2.31e+03 R= 7e+04
-Depth= 9059 States= 1.53e+08 Transitions= 2.52e+09 Memory= 7309.104 t= 2.32e+03 R= 7e+04
-Depth= 9059 States= 1.54e+08 Transitions= 2.53e+09 Memory= 7334.592 t= 2.34e+03 R= 7e+04
-Depth= 9059 States= 1.55e+08 Transitions= 2.55e+09 Memory= 7362.229 t= 2.35e+03 R= 7e+04
-Depth= 9059 States= 1.56e+08 Transitions= 2.56e+09 Memory= 7391.135 t= 2.36e+03 R= 7e+04
-Depth= 9059 States= 1.57e+08 Transitions= 2.57e+09 Memory= 7420.822 t= 2.38e+03 R= 7e+04
-Depth= 9059 States= 1.58e+08 Transitions= 2.59e+09 Memory= 7452.854 t= 2.39e+03 R= 7e+04
-Depth= 9059 States= 1.59e+08 Transitions= 2.6e+09 Memory= 7481.760 t= 2.4e+03 R= 7e+04
-Depth= 9059 States= 1.6e+08 Transitions= 2.62e+09 Memory= 7509.299 t= 2.41e+03 R= 7e+04
-Depth= 9059 States= 1.61e+08 Transitions= 2.63e+09 Memory= 7534.201 t= 2.43e+03 R= 7e+04
-Depth= 9059 States= 1.62e+08 Transitions= 2.65e+09 Memory= 7567.600 t= 2.44e+03 R= 7e+04
-Depth= 9059 States= 1.63e+08 Transitions= 2.66e+09 Memory= 7594.846 t= 2.45e+03 R= 7e+04
-Depth= 9059 States= 1.64e+08 Transitions= 2.67e+09 Memory= 7619.455 t= 2.47e+03 R= 7e+04
-Depth= 9059 States= 1.65e+08 Transitions= 2.7e+09 Memory= 7642.502 t= 2.49e+03 R= 7e+04
-Depth= 9059 States= 1.66e+08 Transitions= 2.72e+09 Memory= 7669.260 t= 2.51e+03 R= 7e+04
-Depth= 9059 States= 1.67e+08 Transitions= 2.73e+09 Memory= 7696.799 t= 2.52e+03 R= 7e+04
-Depth= 9059 States= 1.68e+08 Transitions= 2.75e+09 Memory= 7723.850 t= 2.54e+03 R= 7e+04
-Depth= 9059 States= 1.69e+08 Transitions= 2.77e+09 Memory= 7757.053 t= 2.55e+03 R= 7e+04
-Depth= 9059 States= 1.7e+08 Transitions= 2.78e+09 Memory= 7782.346 t= 2.57e+03 R= 7e+04
-Depth= 9059 States= 1.71e+08 Transitions= 2.8e+09 Memory= 7808.908 t= 2.58e+03 R= 7e+04
-Depth= 9059 States= 1.72e+08 Transitions= 2.81e+09 Memory= 7838.791 t= 2.59e+03 R= 7e+04
-Depth= 9059 States= 1.73e+08 Transitions= 2.83e+09 Memory= 7867.893 t= 2.61e+03 R= 7e+04
-Depth= 9059 States= 1.74e+08 Transitions= 2.85e+09 Memory= 7892.990 t= 2.62e+03 R= 7e+04
-Depth= 9059 States= 1.75e+08 Transitions= 2.86e+09 Memory= 7922.190 t= 2.64e+03 R= 7e+04
-Depth= 9059 States= 1.76e+08 Transitions= 2.89e+09 Memory= 7945.627 t= 2.66e+03 R= 7e+04
-Depth= 9059 States= 1.77e+08 Transitions= 2.9e+09 Memory= 7973.947 t= 2.68e+03 R= 7e+04
-Depth= 9059 States= 1.78e+08 Transitions= 2.93e+09 Memory= 7997.483 t= 2.7e+03 R= 7e+04
-Depth= 9059 States= 1.79e+08 Transitions= 2.94e+09 Memory= 8020.920 t= 2.71e+03 R= 7e+04
-Depth= 9059 States= 1.8e+08 Transitions= 2.96e+09 Memory= 8050.412 t= 2.73e+03 R= 7e+04
-Depth= 9059 States= 1.81e+08 Transitions= 2.97e+09 Memory= 8085.666 t= 2.74e+03 R= 7e+04
-Depth= 9059 States= 1.82e+08 Transitions= 2.98e+09 Memory= 8114.279 t= 2.75e+03 R= 7e+04
-Depth= 9059 States= 1.83e+08 Transitions= 3e+09 Memory= 8137.131 t= 2.77e+03 R= 7e+04
-Depth= 9059 States= 1.84e+08 Transitions= 3.02e+09 Memory= 8165.451 t= 2.79e+03 R= 7e+04
-Depth= 9059 States= 1.85e+08 Transitions= 3.04e+09 Memory= 8193.186 t= 2.8e+03 R= 7e+04
-Depth= 9059 States= 1.86e+08 Transitions= 3.06e+09 Memory= 8218.674 t= 2.82e+03 R= 7e+04
-Depth= 9059 States= 1.87e+08 Transitions= 3.08e+09 Memory= 8255.100 t= 2.83e+03 R= 7e+04
-Depth= 9059 States= 1.88e+08 Transitions= 3.09e+09 Memory= 8279.221 t= 2.85e+03 R= 7e+04
-Depth= 9059 States= 1.89e+08 Transitions= 3.12e+09 Memory= 8298.264 t= 2.87e+03 R= 7e+04
-Depth= 9059 States= 1.9e+08 Transitions= 3.14e+09 Memory= 8325.998 t= 2.89e+03 R= 7e+04
-Depth= 9059 States= 1.91e+08 Transitions= 3.16e+09 Memory= 8349.338 t= 2.91e+03 R= 7e+04
-Depth= 9059 States= 1.92e+08 Transitions= 3.17e+09 Memory= 8379.221 t= 2.92e+03 R= 7e+04
-Depth= 9059 States= 1.93e+08 Transitions= 3.19e+09 Memory= 8403.440 t= 2.94e+03 R= 7e+04
-Depth= 9059 States= 1.94e+08 Transitions= 3.21e+09 Memory= 8430.100 t= 2.96e+03 R= 7e+04
-Depth= 9059 States= 1.95e+08 Transitions= 3.23e+09 Memory= 8455.295 t= 2.97e+03 R= 7e+04
-Depth= 9059 States= 1.96e+08 Transitions= 3.25e+09 Memory= 8482.932 t= 2.99e+03 R= 7e+04
-Depth= 9059 States= 1.97e+08 Transitions= 3.26e+09 Memory= 8515.256 t= 3e+03 R= 7e+04
-Depth= 9059 States= 1.98e+08 Transitions= 3.27e+09 Memory= 8542.502 t= 3.01e+03 R= 7e+04
-Depth= 9059 States= 1.99e+08 Transitions= 3.29e+09 Memory= 8569.260 t= 3.02e+03 R= 7e+04
-Depth= 9059 States= 2e+08 Transitions= 3.3e+09 Memory= 8598.459 t= 3.04e+03 R= 7e+04
-Depth= 9059 States= 2.01e+08 Transitions= 3.32e+09 Memory= 8624.631 t= 3.05e+03 R= 7e+04
-Depth= 9059 States= 2.02e+08 Transitions= 3.33e+09 Memory= 8652.365 t= 3.07e+03 R= 7e+04
-Depth= 9059 States= 2.03e+08 Transitions= 3.35e+09 Memory= 8678.440 t= 3.08e+03 R= 7e+04
-Depth= 9059 States= 2.04e+08 Transitions= 3.36e+09 Memory= 8706.369 t= 3.1e+03 R= 7e+04
-Depth= 9059 States= 2.05e+08 Transitions= 3.38e+09 Memory= 8732.932 t= 3.11e+03 R= 7e+04
-Depth= 9059 States= 2.06e+08 Transitions= 3.39e+09 Memory= 8760.276 t= 3.12e+03 R= 7e+04
-Depth= 9059 States= 2.07e+08 Transitions= 3.41e+09 Memory= 8789.475 t= 3.14e+03 R= 7e+04
-Depth= 9059 States= 2.08e+08 Transitions= 3.42e+09 Memory= 8819.455 t= 3.15e+03 R= 7e+04
-Depth= 9059 States= 2.09e+08 Transitions= 3.43e+09 Memory= 8851.779 t= 3.16e+03 R= 7e+04
-Depth= 9059 States= 2.1e+08 Transitions= 3.45e+09 Memory= 8880.100 t= 3.17e+03 R= 7e+04
-Depth= 9059 States= 2.11e+08 Transitions= 3.46e+09 Memory= 8907.053 t= 3.19e+03 R= 7e+04
-Depth= 9059 States= 2.12e+08 Transitions= 3.48e+09 Memory= 8932.639 t= 3.2e+03 R= 7e+04
-Depth= 9059 States= 2.13e+08 Transitions= 3.49e+09 Memory= 8964.572 t= 3.22e+03 R= 7e+04
-Depth= 9059 States= 2.14e+08 Transitions= 3.51e+09 Memory= 8991.526 t= 3.23e+03 R= 7e+04
-Depth= 9059 States= 2.15e+08 Transitions= 3.52e+09 Memory= 9018.088 t= 3.24e+03 R= 7e+04
-Depth= 9059 States= 2.16e+08 Transitions= 3.54e+09 Memory= 9039.865 t= 3.26e+03 R= 7e+04
-Depth= 9059 States= 2.17e+08 Transitions= 3.56e+09 Memory= 9067.600 t= 3.28e+03 R= 7e+04
-Depth= 9059 States= 2.18e+08 Transitions= 3.58e+09 Memory= 9094.260 t= 3.3e+03 R= 7e+04
-Depth= 9059 States= 2.19e+08 Transitions= 3.6e+09 Memory= 9122.483 t= 3.31e+03 R= 7e+04
-Depth= 9059 States= 2.2e+08 Transitions= 3.61e+09 Memory= 9153.635 t= 3.32e+03 R= 7e+04
-Depth= 9059 States= 2.21e+08 Transitions= 3.63e+09 Memory= 9181.272 t= 3.34e+03 R= 7e+04
-Depth= 9059 States= 2.22e+08 Transitions= 3.65e+09 Memory= 9207.639 t= 3.36e+03 R= 7e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 9059, errors: 0
- 88961904 states, stored (2.22145e+08 visited)
-3.4291111e+09 states, matched
-3.6512561e+09 transitions (= visited+matched)
-1.2885947e+10 atomic steps
-hash conflicts: 7.2188776e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7805.343 equivalent memory usage for states (stored*(State-vector + overhead))
- 6706.219 actual memory usage for states (compression: 85.92%)
- state-vector as stored = 51 byte + 28 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.122 memory lost to fragmentation
- 9210.861 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.36e+03 seconds
-pan: rate 66138.803 states/second
-pan: avg transition delay 9.1989e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4401
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-3:4:4356
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-736:3:2531
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-738:3:2543
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-749:0:4401
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-759:3:2614
-760:3:2625
-761:3:2626
-762:3:2637
-763:3:2638
-764:3:2639
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-766:3:2655
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-785:3:2708
-786:3:2709
-787:3:2714
-788:3:2721
-789:3:2722
-790:3:2729
-791:3:2734
-792:0:4401
-793:3:2745
-794:0:4401
-795:3:2749
-796:3:2750
-797:3:2754
-798:3:2758
-799:3:2759
-800:3:2763
-801:3:2771
-802:3:2772
-803:3:2777
-804:3:2784
-805:3:2785
-806:3:2792
-807:3:2797
-808:0:4401
-809:3:2808
-810:0:4401
-811:3:2816
-812:3:2817
-813:3:2821
-814:3:2825
-815:3:2826
-816:3:2830
-817:3:2838
-818:3:2839
-819:3:2844
-820:3:2851
-821:3:2852
-822:3:2859
-823:3:2864
-824:0:4401
-825:3:2879
-826:0:4401
-827:3:2881
-828:0:4401
-829:3:2882
-830:3:2886
-831:3:2887
-832:3:2895
-833:3:2896
-834:3:2900
-835:3:2901
-836:3:2909
-837:3:2914
-838:3:2918
-839:3:2919
-840:3:2926
-841:3:2927
-842:3:2938
-843:3:2939
-844:3:2940
-845:3:2951
-846:3:2956
-847:3:2957
-848:0:4401
-849:3:2969
-850:0:4401
-851:3:2971
-852:0:4401
-853:3:2974
-854:3:2975
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-856:3:2988
-857:3:2992
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-867:3:3032
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-869:3:3048
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-890:3:3099
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-905:0:4401
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-914:3:3470
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-933:0:4401
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-1018:0:4401
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-1042:3:4219
-1043:3:4227
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-1050:0:4401
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-1063:3:4308
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-1068:0:4401
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-1092:0:4401
-1093:2:1245
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-1096:0:4401
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-1104:0:4401
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-1108:0:4401
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-1127:3:4347
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-1142:0:4401
-1143:3:4347
-1144:0:4401
-1145:1:15
-1146:0:4401
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-1148:0:4401
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-1151:3:4347
-1152:0:4401
-1153:1:16
-1154:1:20
-1155:1:21
-1156:1:29
-1157:1:30
-1158:1:34
-1159:1:35
-1160:1:43
-1161:1:48
-1162:1:52
-1163:1:53
-1164:1:60
-1165:1:61
-1166:1:72
-1167:1:73
-1168:1:74
-1169:1:85
-1170:1:90
-1171:1:91
-1172:0:4401
-1173:3:4346
-1174:0:4401
-1175:2:1245
-1176:0:4401
-1177:3:4347
-1178:0:4401
-1179:1:103
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-1181:3:4346
-1182:0:4401
-1183:2:1246
-1184:0:4401
-1185:3:4347
-1186:0:4401
-1187:2:1247
-1188:0:4401
-1189:3:4346
-1190:0:4401
-1191:2:1253
-1192:0:4401
-1193:3:4347
-1194:0:4401
-1195:2:1254
-1196:0:4399
-1197:3:4346
-1198:0:4405
-1199:3:4347
-1200:0:4405
-1201:2:1257
-1202:0:4405
-1203:3:4346
-1204:0:4405
-1205:2:1258
-1206:0:4405
-1207:3:4347
-1208:0:4405
-1209:2:1259
-1210:2:1263
-1211:2:1264
-1212:2:1272
-1213:2:1273
-1214:2:1277
-1215:2:1278
-1216:2:1286
-1217:2:1291
-1218:2:1295
-1219:2:1296
-1220:2:1303
-1221:2:1304
-1222:2:1315
-1223:2:1316
-1224:2:1317
-1225:2:1328
-1226:2:1333
-1227:2:1334
-1228:0:4405
-1229:3:4346
-1230:0:4405
-1231:2:1346
-1232:0:4405
-1233:3:4347
-1234:0:4405
-1235:2:1347
-1236:0:4405
-1237:3:4346
-1238:0:4405
-1239:1:104
--1:-1:-1
-1240:0:4405
-1241:3:4347
-1242:0:4405
-1243:3:4346
-1244:0:4405
-1245:2:1348
-1246:0:4405
-1247:3:4347
-1248:0:4405
-1249:2:1347
-1250:0:4405
-1251:3:4346
-1252:0:4405
-1253:1:105
-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1194: Claim reached state 9 (line 748)
-Depth= 3253 States= 1e+06 Transitions= 1.06e+07 Memory= 484.416 t= 9.64 R= 1e+05
-Depth= 3253 States= 2e+06 Transitions= 2.04e+07 Memory= 501.311 t= 18.6 R= 1e+05
-Depth= 3253 States= 3e+06 Transitions= 3.44e+07 Memory= 516.252 t= 31.6 R= 9e+04
-pan: resizing hashtable to -w22.. done
-Depth= 7995 States= 4e+06 Transitions= 4.66e+07 Memory= 563.486 t= 42.8 R= 9e+04
-Depth= 7995 States= 5e+06 Transitions= 6.05e+07 Memory= 580.674 t= 55.6 R= 9e+04
-Depth= 7995 States= 6e+06 Transitions= 7.12e+07 Memory= 599.229 t= 65.5 R= 9e+04
-Depth= 7995 States= 7e+06 Transitions= 8.58e+07 Memory= 613.975 t= 78.9 R= 9e+04
-Depth= 7995 States= 8e+06 Transitions= 9.62e+07 Memory= 631.846 t= 88.7 R= 9e+04
-Depth= 7995 States= 9e+06 Transitions= 1.1e+08 Memory= 646.592 t= 101 R= 9e+04
-pan: resizing hashtable to -w24.. done
-Depth= 7995 States= 1e+07 Transitions= 1.32e+08 Memory= 783.869 t= 122 R= 8e+04
-Depth= 7995 States= 1.1e+07 Transitions= 1.52e+08 Memory= 799.104 t= 140 R= 8e+04
-Depth= 7995 States= 1.2e+07 Transitions= 1.71e+08 Memory= 814.533 t= 157 R= 8e+04
-Depth= 7995 States= 1.3e+07 Transitions= 1.9e+08 Memory= 829.670 t= 174 R= 7e+04
-Depth= 7995 States= 1.4e+07 Transitions= 2.01e+08 Memory= 848.029 t= 185 R= 8e+04
-Depth= 7995 States= 1.5e+07 Transitions= 2.21e+08 Memory= 862.287 t= 203 R= 7e+04
-Depth= 7995 States= 1.6e+07 Transitions= 2.35e+08 Memory= 877.815 t= 215 R= 7e+04
-Depth= 7995 States= 1.7e+07 Transitions= 2.44e+08 Memory= 897.736 t= 223 R= 8e+04
-Depth= 7995 States= 1.8e+07 Transitions= 2.57e+08 Memory= 911.115 t= 235 R= 8e+04
-Depth= 7995 States= 1.9e+07 Transitions= 2.69e+08 Memory= 927.033 t= 246 R= 8e+04
-Depth= 8341 States= 2e+07 Transitions= 2.83e+08 Memory= 943.440 t= 259 R= 8e+04
-Depth= 8341 States= 2.1e+07 Transitions= 2.96e+08 Memory= 961.604 t= 271 R= 8e+04
-Depth= 8341 States= 2.2e+07 Transitions= 3.07e+08 Memory= 978.791 t= 281 R= 8e+04
-Depth= 8341 States= 2.3e+07 Transitions= 3.2e+08 Memory= 996.369 t= 293 R= 8e+04
-Depth= 8341 States= 2.4e+07 Transitions= 3.32e+08 Memory= 1013.264 t= 304 R= 8e+04
-Depth= 8341 States= 2.5e+07 Transitions= 3.48e+08 Memory= 1024.885 t= 319 R= 8e+04
-Depth= 8341 States= 2.6e+07 Transitions= 3.72e+08 Memory= 1038.947 t= 341 R= 8e+04
-Depth= 8341 States= 2.7e+07 Transitions= 3.91e+08 Memory= 1055.158 t= 358 R= 8e+04
-Depth= 8341 States= 2.8e+07 Transitions= 4.09e+08 Memory= 1069.904 t= 374 R= 7e+04
-Depth= 8341 States= 2.9e+07 Transitions= 4.25e+08 Memory= 1086.701 t= 389 R= 7e+04
-Depth= 8341 States= 3e+07 Transitions= 4.43e+08 Memory= 1102.131 t= 405 R= 7e+04
-Depth= 8341 States= 3.1e+07 Transitions= 4.58e+08 Memory= 1117.268 t= 419 R= 7e+04
-Depth= 8341 States= 3.2e+07 Transitions= 4.68e+08 Memory= 1136.213 t= 429 R= 7e+04
-Depth= 8341 States= 3.3e+07 Transitions= 4.8e+08 Memory= 1151.154 t= 440 R= 8e+04
-Depth= 8341 States= 3.4e+07 Transitions= 4.92e+08 Memory= 1166.779 t= 451 R= 8e+04
-pan: resizing hashtable to -w26.. done
-Depth= 8687 States= 3.5e+07 Transitions= 5.05e+08 Memory= 1679.658 t= 464 R= 8e+04
-Depth= 8687 States= 3.6e+07 Transitions= 5.18e+08 Memory= 1697.432 t= 477 R= 8e+04
-Depth= 8687 States= 3.7e+07 Transitions= 5.29e+08 Memory= 1714.326 t= 487 R= 8e+04
-Depth= 8687 States= 3.8e+07 Transitions= 5.44e+08 Memory= 1730.244 t= 500 R= 8e+04
-Depth= 8687 States= 3.9e+07 Transitions= 5.55e+08 Memory= 1747.920 t= 511 R= 8e+04
-Depth= 8687 States= 4e+07 Transitions= 5.69e+08 Memory= 1761.885 t= 523 R= 8e+04
-Depth= 8687 States= 4.1e+07 Transitions= 5.92e+08 Memory= 1775.850 t= 544 R= 8e+04
-Depth= 8687 States= 4.2e+07 Transitions= 6.12e+08 Memory= 1790.498 t= 562 R= 7e+04
-Depth= 8687 States= 4.3e+07 Transitions= 6.29e+08 Memory= 1807.783 t= 578 R= 7e+04
-Depth= 8687 States= 4.4e+07 Transitions= 6.48e+08 Memory= 1822.432 t= 595 R= 7e+04
-Depth= 8687 States= 4.5e+07 Transitions= 6.61e+08 Memory= 1838.838 t= 606 R= 7e+04
-Depth= 8687 States= 4.6e+07 Transitions= 6.81e+08 Memory= 1853.291 t= 625 R= 7e+04
-Depth= 8687 States= 4.7e+07 Transitions= 6.93e+08 Memory= 1870.772 t= 635 R= 7e+04
-Depth= 8687 States= 4.8e+07 Transitions= 7.02e+08 Memory= 1889.912 t= 644 R= 7e+04
-Depth= 8687 States= 4.9e+07 Transitions= 7.15e+08 Memory= 1902.998 t= 656 R= 7e+04
-Depth= 8687 States= 5e+07 Transitions= 7.27e+08 Memory= 1919.600 t= 667 R= 7e+04
-Depth= 9033 States= 5.1e+07 Transitions= 7.42e+08 Memory= 1935.518 t= 681 R= 7e+04
-Depth= 9033 States= 5.2e+07 Transitions= 7.53e+08 Memory= 1954.170 t= 691 R= 8e+04
-Depth= 9033 States= 5.3e+07 Transitions= 7.66e+08 Memory= 1969.990 t= 703 R= 8e+04
-Depth= 9033 States= 5.4e+07 Transitions= 7.77e+08 Memory= 1988.545 t= 713 R= 8e+04
-Depth= 9033 States= 5.5e+07 Transitions= 7.9e+08 Memory= 2004.756 t= 725 R= 8e+04
-Depth= 9033 States= 5.6e+07 Transitions= 8.1e+08 Memory= 2016.084 t= 743 R= 8e+04
-Depth= 9033 States= 5.7e+07 Transitions= 8.32e+08 Memory= 2030.440 t= 763 R= 7e+04
-Depth= 9033 States= 5.8e+07 Transitions= 8.51e+08 Memory= 2046.260 t= 781 R= 7e+04
-Depth= 9033 States= 5.9e+07 Transitions= 8.7e+08 Memory= 2061.592 t= 797 R= 7e+04
-Depth= 9033 States= 6e+07 Transitions= 8.83e+08 Memory= 2078.779 t= 809 R= 7e+04
-Depth= 9033 States= 6.1e+07 Transitions= 9.01e+08 Memory= 2094.014 t= 826 R= 7e+04
-Depth= 9033 States= 6.2e+07 Transitions= 9.16e+08 Memory= 2108.467 t= 840 R= 7e+04
-Depth= 9033 States= 6.3e+07 Transitions= 9.26e+08 Memory= 2126.924 t= 849 R= 7e+04
-Depth= 9033 States= 6.4e+07 Transitions= 9.38e+08 Memory= 2142.158 t= 860 R= 7e+04
-Depth= 9033 States= 6.5e+07 Transitions= 9.51e+08 Memory= 2157.295 t= 871 R= 7e+04
-Depth= 9379 States= 6.6e+07 Transitions= 9.63e+08 Memory= 2173.115 t= 883 R= 7e+04
-Depth= 9379 States= 6.7e+07 Transitions= 9.77e+08 Memory= 2190.401 t= 895 R= 7e+04
-Depth= 9379 States= 6.8e+07 Transitions= 9.88e+08 Memory= 2208.955 t= 905 R= 8e+04
-Depth= 9379 States= 6.9e+07 Transitions= 1e+09 Memory= 2223.311 t= 919 R= 8e+04
-Depth= 9379 States= 7e+07 Transitions= 1.01e+09 Memory= 2242.256 t= 928 R= 8e+04
-Depth= 9379 States= 7.1e+07 Transitions= 1.03e+09 Memory= 2257.295 t= 940 R= 8e+04
-Depth= 9379 States= 7.2e+07 Transitions= 1.05e+09 Memory= 2269.307 t= 960 R= 8e+04
-Depth= 9379 States= 7.3e+07 Transitions= 1.07e+09 Memory= 2283.760 t= 979 R= 7e+04
-Depth= 9379 States= 7.4e+07 Transitions= 1.09e+09 Memory= 2299.385 t= 996 R= 7e+04
-Depth= 9379 States= 7.5e+07 Transitions= 1.11e+09 Memory= 2314.619 t= 1.01e+03 R= 7e+04
-Depth= 9379 States= 7.6e+07 Transitions= 1.12e+09 Memory= 2333.369 t= 1.02e+03 R= 7e+04
-Depth= 9379 States= 7.7e+07 Transitions= 1.14e+09 Memory= 2347.139 t= 1.04e+03 R= 7e+04
-Depth= 9379 States= 7.8e+07 Transitions= 1.15e+09 Memory= 2385.029 t= 1.06e+03 R= 7e+04
-Depth= 9379 States= 7.9e+07 Transitions= 1.17e+09 Memory= 2453.682 t= 1.07e+03 R= 7e+04
-Depth= 9379 States= 8e+07 Transitions= 1.18e+09 Memory= 2522.236 t= 1.08e+03 R= 7e+04
-Depth= 9379 States= 8.1e+07 Transitions= 1.2e+09 Memory= 2590.889 t= 1.1e+03 R= 7e+04
-Depth= 9379 States= 8.2e+07 Transitions= 1.22e+09 Memory= 2624.287 t= 1.12e+03 R= 7e+04
-Depth= 9379 States= 8.3e+07 Transitions= 1.23e+09 Memory= 2640.303 t= 1.13e+03 R= 7e+04
-Depth= 9379 States= 8.4e+07 Transitions= 1.25e+09 Memory= 2654.170 t= 1.15e+03 R= 7e+04
-Depth= 9379 States= 8.5e+07 Transitions= 1.27e+09 Memory= 2669.111 t= 1.16e+03 R= 7e+04
-Depth= 9379 States= 8.6e+07 Transitions= 1.29e+09 Memory= 2684.053 t= 1.18e+03 R= 7e+04
-Depth= 9379 States= 8.7e+07 Transitions= 1.31e+09 Memory= 2698.604 t= 1.2e+03 R= 7e+04
-Depth= 9379 States= 8.8e+07 Transitions= 1.33e+09 Memory= 2719.697 t= 1.22e+03 R= 7e+04
-Depth= 9379 States= 8.9e+07 Transitions= 1.35e+09 Memory= 2788.350 t= 1.24e+03 R= 7e+04
-Depth= 9379 States= 9e+07 Transitions= 1.37e+09 Memory= 2819.990 t= 1.26e+03 R= 7e+04
-Depth= 9379 States= 9.1e+07 Transitions= 1.39e+09 Memory= 2846.553 t= 1.27e+03 R= 7e+04
-Depth= 9379 States= 9.2e+07 Transitions= 1.4e+09 Memory= 2864.912 t= 1.28e+03 R= 7e+04
-Depth= 9379 States= 9.3e+07 Transitions= 1.41e+09 Memory= 2877.901 t= 1.3e+03 R= 7e+04
-Depth= 9379 States= 9.4e+07 Transitions= 1.44e+09 Memory= 2892.842 t= 1.31e+03 R= 7e+04
-Depth= 9379 States= 9.5e+07 Transitions= 1.45e+09 Memory= 2908.076 t= 1.33e+03 R= 7e+04
-Depth= 9379 States= 9.6e+07 Transitions= 1.47e+09 Memory= 2922.627 t= 1.35e+03 R= 7e+04
-Depth= 9379 States= 9.7e+07 Transitions= 1.49e+09 Memory= 2940.693 t= 1.36e+03 R= 7e+04
-Depth= 9379 States= 9.8e+07 Transitions= 1.51e+09 Memory= 2953.291 t= 1.38e+03 R= 7e+04
-Depth= 9379 States= 9.9e+07 Transitions= 1.53e+09 Memory= 2968.526 t= 1.4e+03 R= 7e+04
-Depth= 9379 States= 1e+08 Transitions= 1.56e+09 Memory= 2981.709 t= 1.42e+03 R= 7e+04
-Depth= 9379 States= 1.01e+08 Transitions= 1.57e+09 Memory= 2997.236 t= 1.44e+03 R= 7e+04
-Depth= 9379 States= 1.02e+08 Transitions= 1.59e+09 Memory= 3011.592 t= 1.46e+03 R= 7e+04
-Depth= 9379 States= 1.03e+08 Transitions= 1.61e+09 Memory= 3037.861 t= 1.47e+03 R= 7e+04
-Depth= 9379 States= 1.04e+08 Transitions= 1.63e+09 Memory= 3106.514 t= 1.49e+03 R= 7e+04
-Depth= 9379 States= 1.05e+08 Transitions= 1.65e+09 Memory= 3175.166 t= 1.51e+03 R= 7e+04
-Depth= 9379 States= 1.06e+08 Transitions= 1.67e+09 Memory= 3223.897 t= 1.52e+03 R= 7e+04
-Depth= 9379 States= 1.07e+08 Transitions= 1.68e+09 Memory= 3246.846 t= 1.54e+03 R= 7e+04
-Depth= 9379 States= 1.08e+08 Transitions= 1.7e+09 Memory= 3283.467 t= 1.56e+03 R= 7e+04
-Depth= 9379 States= 1.09e+08 Transitions= 1.72e+09 Memory= 3316.670 t= 1.57e+03 R= 7e+04
-Depth= 9379 States= 1.1e+08 Transitions= 1.73e+09 Memory= 3344.209 t= 1.59e+03 R= 7e+04
-Depth= 9379 States= 1.11e+08 Transitions= 1.75e+09 Memory= 3376.338 t= 1.6e+03 R= 7e+04
-Depth= 9379 States= 1.12e+08 Transitions= 1.76e+09 Memory= 3396.943 t= 1.62e+03 R= 7e+04
-Depth= 9379 States= 1.13e+08 Transitions= 1.78e+09 Memory= 3426.143 t= 1.63e+03 R= 7e+04
-Depth= 9379 States= 1.14e+08 Transitions= 1.8e+09 Memory= 3452.705 t= 1.65e+03 R= 7e+04
-Depth= 9379 States= 1.15e+08 Transitions= 1.81e+09 Memory= 3493.818 t= 1.66e+03 R= 7e+04
-Depth= 9379 States= 1.16e+08 Transitions= 1.83e+09 Memory= 3533.369 t= 1.67e+03 R= 7e+04
-Depth= 9379 States= 1.17e+08 Transitions= 1.84e+09 Memory= 3566.182 t= 1.69e+03 R= 7e+04
-Depth= 9379 States= 1.18e+08 Transitions= 1.86e+09 Memory= 3582.881 t= 1.7e+03 R= 7e+04
-Depth= 9379 States= 1.19e+08 Transitions= 1.88e+09 Memory= 3630.830 t= 1.72e+03 R= 7e+04
-Depth= 9379 States= 1.2e+08 Transitions= 1.89e+09 Memory= 3692.744 t= 1.74e+03 R= 7e+04
-Depth= 9379 States= 1.21e+08 Transitions= 1.91e+09 Memory= 3750.361 t= 1.75e+03 R= 7e+04
-Depth= 9379 States= 1.22e+08 Transitions= 1.92e+09 Memory= 3767.354 t= 1.76e+03 R= 7e+04
-Depth= 9379 States= 1.23e+08 Transitions= 1.94e+09 Memory= 3781.904 t= 1.78e+03 R= 7e+04
-Depth= 9379 States= 1.24e+08 Transitions= 1.96e+09 Memory= 3797.529 t= 1.8e+03 R= 7e+04
-Depth= 9379 States= 1.25e+08 Transitions= 1.98e+09 Memory= 3810.908 t= 1.82e+03 R= 7e+04
-Depth= 9379 States= 1.26e+08 Transitions= 2e+09 Memory= 3826.143 t= 1.83e+03 R= 7e+04
-Depth= 9379 States= 1.27e+08 Transitions= 2.02e+09 Memory= 3839.717 t= 1.86e+03 R= 7e+04
-Depth= 9379 States= 1.28e+08 Transitions= 2.04e+09 Memory= 3881.709 t= 1.87e+03 R= 7e+04
-Depth= 9379 States= 1.29e+08 Transitions= 2.06e+09 Memory= 3946.553 t= 1.89e+03 R= 7e+04
-Depth= 9379 States= 1.3e+08 Transitions= 2.08e+09 Memory= 3970.479 t= 1.91e+03 R= 7e+04
-Depth= 9379 States= 1.31e+08 Transitions= 2.09e+09 Memory= 3991.768 t= 1.92e+03 R= 7e+04
-Depth= 9379 States= 1.32e+08 Transitions= 2.1e+09 Memory= 4007.490 t= 1.93e+03 R= 7e+04
-Depth= 9379 States= 1.33e+08 Transitions= 2.13e+09 Memory= 4020.772 t= 1.95e+03 R= 7e+04
-Depth= 9379 States= 1.34e+08 Transitions= 2.14e+09 Memory= 4036.201 t= 1.97e+03 R= 7e+04
-Depth= 9379 States= 1.35e+08 Transitions= 2.16e+09 Memory= 4051.924 t= 1.98e+03 R= 7e+04
-pan: resizing hashtable to -w28.. done
-Depth= 9379 States= 1.36e+08 Transitions= 2.18e+09 Memory= 6099.924 t= 2.02e+03 R= 7e+04
-Depth= 9379 States= 1.37e+08 Transitions= 2.2e+09 Memory= 6099.924 t= 2.03e+03 R= 7e+04
-Depth= 9379 States= 1.38e+08 Transitions= 2.22e+09 Memory= 6099.924 t= 2.05e+03 R= 7e+04
-Depth= 9379 States= 1.39e+08 Transitions= 2.24e+09 Memory= 6099.924 t= 2.07e+03 R= 7e+04
-Depth= 9379 States= 1.4e+08 Transitions= 2.26e+09 Memory= 6108.518 t= 2.09e+03 R= 7e+04
-Depth= 9379 States= 1.41e+08 Transitions= 2.28e+09 Memory= 6124.729 t= 2.1e+03 R= 7e+04
-Depth= 9379 States= 1.42e+08 Transitions= 2.3e+09 Memory= 6138.889 t= 2.12e+03 R= 7e+04
-Depth= 9379 States= 1.43e+08 Transitions= 2.31e+09 Memory= 6178.928 t= 2.13e+03 R= 7e+04
-Depth= 9379 States= 1.44e+08 Transitions= 2.33e+09 Memory= 6247.483 t= 2.15e+03 R= 7e+04
-Depth= 9379 States= 1.45e+08 Transitions= 2.35e+09 Memory= 6316.135 t= 2.17e+03 R= 7e+04
-Depth= 9379 States= 1.46e+08 Transitions= 2.37e+09 Memory= 6353.440 t= 2.19e+03 R= 7e+04
-Depth= 9379 States= 1.47e+08 Transitions= 2.39e+09 Memory= 6381.662 t= 2.21e+03 R= 7e+04
-Depth= 9379 States= 1.48e+08 Transitions= 2.41e+09 Memory= 6422.190 t= 2.22e+03 R= 7e+04
-Depth= 9379 States= 1.49e+08 Transitions= 2.42e+09 Memory= 6449.143 t= 2.23e+03 R= 7e+04
-Depth= 9379 States= 1.5e+08 Transitions= 2.44e+09 Memory= 6472.580 t= 2.25e+03 R= 7e+04
-Depth= 9379 States= 1.51e+08 Transitions= 2.45e+09 Memory= 6503.733 t= 2.26e+03 R= 7e+04
-Depth= 9379 States= 1.52e+08 Transitions= 2.47e+09 Memory= 6531.369 t= 2.28e+03 R= 7e+04
-Depth= 9379 States= 1.53e+08 Transitions= 2.49e+09 Memory= 6554.123 t= 2.29e+03 R= 7e+04
-Depth= 9379 States= 1.54e+08 Transitions= 2.5e+09 Memory= 6585.373 t= 2.31e+03 R= 7e+04
-Depth= 9379 States= 1.55e+08 Transitions= 2.52e+09 Memory= 6622.776 t= 2.32e+03 R= 7e+04
-Depth= 9379 States= 1.56e+08 Transitions= 2.54e+09 Memory= 6671.213 t= 2.34e+03 R= 7e+04
-Depth= 9379 States= 1.57e+08 Transitions= 2.55e+09 Memory= 6696.115 t= 2.35e+03 R= 7e+04
-Depth= 9379 States= 1.58e+08 Transitions= 2.57e+09 Memory= 6722.776 t= 2.37e+03 R= 7e+04
-Depth= 9379 States= 1.59e+08 Transitions= 2.58e+09 Memory= 6764.572 t= 2.38e+03 R= 7e+04
-Depth= 9379 States= 1.6e+08 Transitions= 2.6e+09 Memory= 6830.490 t= 2.4e+03 R= 7e+04
-Depth= 9379 States= 1.61e+08 Transitions= 2.62e+09 Memory= 6879.026 t= 2.41e+03 R= 7e+04
-Depth= 9379 States= 1.62e+08 Transitions= 2.63e+09 Memory= 6895.432 t= 2.42e+03 R= 7e+04
-Depth= 9379 States= 1.63e+08 Transitions= 2.65e+09 Memory= 6909.787 t= 2.44e+03 R= 7e+04
-Depth= 9379 States= 1.64e+08 Transitions= 2.67e+09 Memory= 6925.217 t= 2.46e+03 R= 7e+04
-Depth= 9379 States= 1.65e+08 Transitions= 2.69e+09 Memory= 6938.986 t= 2.48e+03 R= 7e+04
-Depth= 9379 States= 1.66e+08 Transitions= 2.71e+09 Memory= 6953.537 t= 2.5e+03 R= 7e+04
-Depth= 9379 States= 1.67e+08 Transitions= 2.73e+09 Memory= 6967.893 t= 2.52e+03 R= 7e+04
-Depth= 9379 States= 1.68e+08 Transitions= 2.75e+09 Memory= 7022.190 t= 2.53e+03 R= 7e+04
-Depth= 9379 States= 1.69e+08 Transitions= 2.77e+09 Memory= 7076.779 t= 2.55e+03 R= 7e+04
-Depth= 9379 States= 1.7e+08 Transitions= 2.79e+09 Memory= 7102.365 t= 2.57e+03 R= 7e+04
-Depth= 9379 States= 1.71e+08 Transitions= 2.8e+09 Memory= 7119.162 t= 2.58e+03 R= 7e+04
-Depth= 9379 States= 1.72e+08 Transitions= 2.81e+09 Memory= 7135.178 t= 2.59e+03 R= 7e+04
-Depth= 9379 States= 1.73e+08 Transitions= 2.84e+09 Memory= 7150.022 t= 2.61e+03 R= 7e+04
-Depth= 9379 States= 1.74e+08 Transitions= 2.85e+09 Memory= 7164.475 t= 2.63e+03 R= 7e+04
-Depth= 9379 States= 1.75e+08 Transitions= 2.87e+09 Memory= 7180.295 t= 2.64e+03 R= 7e+04
-Depth= 9379 States= 1.76e+08 Transitions= 2.89e+09 Memory= 7198.264 t= 2.66e+03 R= 7e+04
-Depth= 9379 States= 1.77e+08 Transitions= 2.9e+09 Memory= 7211.447 t= 2.67e+03 R= 7e+04
-Depth= 9379 States= 1.78e+08 Transitions= 2.93e+09 Memory= 7224.338 t= 2.7e+03 R= 7e+04
-Depth= 9379 States= 1.79e+08 Transitions= 2.95e+09 Memory= 7239.084 t= 2.72e+03 R= 7e+04
-Depth= 9379 States= 1.8e+08 Transitions= 2.97e+09 Memory= 7253.342 t= 2.74e+03 R= 7e+04
-Depth= 9379 States= 1.81e+08 Transitions= 2.99e+09 Memory= 7268.283 t= 2.75e+03 R= 7e+04
-Depth= 9379 States= 1.82e+08 Transitions= 3.01e+09 Memory= 7283.615 t= 2.77e+03 R= 7e+04
-Depth= 9379 States= 1.83e+08 Transitions= 3.02e+09 Memory= 7335.276 t= 2.78e+03 R= 7e+04
-Depth= 9379 States= 1.84e+08 Transitions= 3.04e+09 Memory= 7403.928 t= 2.8e+03 R= 7e+04
-Depth= 9379 States= 1.85e+08 Transitions= 3.06e+09 Memory= 7472.580 t= 2.82e+03 R= 7e+04
-Depth= 9379 States= 1.86e+08 Transitions= 3.08e+09 Memory= 7501.877 t= 2.84e+03 R= 7e+04
-Depth= 9379 States= 1.87e+08 Transitions= 3.1e+09 Memory= 7528.147 t= 2.85e+03 R= 7e+04
-Depth= 9379 States= 1.88e+08 Transitions= 3.11e+09 Memory= 7566.135 t= 2.87e+03 R= 7e+04
-Depth= 9379 States= 1.89e+08 Transitions= 3.13e+09 Memory= 7593.479 t= 2.88e+03 R= 7e+04
-Depth= 9379 States= 1.9e+08 Transitions= 3.15e+09 Memory= 7625.119 t= 2.9e+03 R= 7e+04
-Depth= 9379 States= 1.91e+08 Transitions= 3.16e+09 Memory= 7647.483 t= 2.91e+03 R= 7e+04
-Depth= 9379 States= 1.92e+08 Transitions= 3.18e+09 Memory= 7677.951 t= 2.93e+03 R= 7e+04
-Depth= 9379 States= 1.93e+08 Transitions= 3.2e+09 Memory= 7698.947 t= 2.94e+03 R= 7e+04
-Depth= 9379 States= 1.94e+08 Transitions= 3.21e+09 Memory= 7732.443 t= 2.96e+03 R= 7e+04
-Depth= 9379 States= 1.95e+08 Transitions= 3.23e+09 Memory= 7772.092 t= 2.97e+03 R= 7e+04
-Depth= 9379 States= 1.96e+08 Transitions= 3.24e+09 Memory= 7815.451 t= 2.98e+03 R= 7e+04
-Depth= 9379 States= 1.97e+08 Transitions= 3.26e+09 Memory= 7839.865 t= 3e+03 R= 7e+04
-Depth= 9379 States= 1.98e+08 Transitions= 3.28e+09 Memory= 7869.651 t= 3.01e+03 R= 7e+04
-Depth= 9379 States= 1.99e+08 Transitions= 3.29e+09 Memory= 7921.018 t= 3.03e+03 R= 7e+04
-Depth= 9379 States= 2e+08 Transitions= 3.31e+09 Memory= 7986.740 t= 3.05e+03 R= 7e+04
-Depth= 9379 States= 2.01e+08 Transitions= 3.33e+09 Memory= 8023.752 t= 3.06e+03 R= 7e+04
-Depth= 9379 States= 2.02e+08 Transitions= 3.34e+09 Memory= 8039.768 t= 3.07e+03 R= 7e+04
-Depth= 9379 States= 2.03e+08 Transitions= 3.36e+09 Memory= 8053.830 t= 3.09e+03 R= 7e+04
-Depth= 9379 States= 2.04e+08 Transitions= 3.38e+09 Memory= 8068.772 t= 3.11e+03 R= 7e+04
-Depth= 9379 States= 2.05e+08 Transitions= 3.4e+09 Memory= 8083.127 t= 3.13e+03 R= 7e+04
-Depth= 9379 States= 2.06e+08 Transitions= 3.42e+09 Memory= 8098.068 t= 3.15e+03 R= 7e+04
-Depth= 9379 States= 2.07e+08 Transitions= 3.44e+09 Memory= 8115.744 t= 3.16e+03 R= 7e+04
-Depth= 9379 States= 2.08e+08 Transitions= 3.46e+09 Memory= 8178.537 t= 3.18e+03 R= 7e+04
-Depth= 9379 States= 2.09e+08 Transitions= 3.48e+09 Memory= 8220.627 t= 3.2e+03 R= 7e+04
-Depth= 9379 States= 2.1e+08 Transitions= 3.49e+09 Memory= 8246.799 t= 3.21e+03 R= 7e+04
-Depth= 9379 States= 2.11e+08 Transitions= 3.5e+09 Memory= 8263.791 t= 3.22e+03 R= 7e+04
-Depth= 9379 States= 2.12e+08 Transitions= 3.52e+09 Memory= 8279.514 t= 3.24e+03 R= 7e+04
-Depth= 9379 States= 2.13e+08 Transitions= 3.54e+09 Memory= 8293.772 t= 3.26e+03 R= 7e+04
-Depth= 9379 States= 2.14e+08 Transitions= 3.56e+09 Memory= 8309.201 t= 3.28e+03 R= 7e+04
-Depth= 9379 States= 2.15e+08 Transitions= 3.58e+09 Memory= 8323.752 t= 3.29e+03 R= 7e+04
-Depth= 9379 States= 2.16e+08 Transitions= 3.6e+09 Memory= 8342.990 t= 3.31e+03 R= 7e+04
-Depth= 9379 States= 2.17e+08 Transitions= 3.61e+09 Memory= 8355.197 t= 3.32e+03 R= 7e+04
-Depth= 9379 States= 2.18e+08 Transitions= 3.64e+09 Memory= 8368.674 t= 3.35e+03 R= 7e+04
-Depth= 9379 States= 2.19e+08 Transitions= 3.66e+09 Memory= 8382.932 t= 3.37e+03 R= 7e+04
-Depth= 9379 States= 2.2e+08 Transitions= 3.68e+09 Memory= 8398.459 t= 3.38e+03 R= 7e+04
-Depth= 9379 States= 2.21e+08 Transitions= 3.7e+09 Memory= 8412.912 t= 3.4e+03 R= 6e+04
-Depth= 9379 States= 2.22e+08 Transitions= 3.71e+09 Memory= 8428.244 t= 3.42e+03 R= 6e+04
-Depth= 9379 States= 2.23e+08 Transitions= 3.73e+09 Memory= 8491.721 t= 3.43e+03 R= 6e+04
-Depth= 9379 States= 2.24e+08 Transitions= 3.75e+09 Memory= 8560.373 t= 3.45e+03 R= 6e+04
-Depth= 9379 States= 2.25e+08 Transitions= 3.77e+09 Memory= 8621.604 t= 3.47e+03 R= 6e+04
-Depth= 9379 States= 2.26e+08 Transitions= 3.79e+09 Memory= 8648.850 t= 3.48e+03 R= 6e+04
-Depth= 9379 States= 2.27e+08 Transitions= 3.81e+09 Memory= 8671.994 t= 3.5e+03 R= 6e+04
-Depth= 9379 States= 2.28e+08 Transitions= 3.82e+09 Memory= 8710.861 t= 3.51e+03 R= 6e+04
-Depth= 9379 States= 2.29e+08 Transitions= 3.84e+09 Memory= 8742.893 t= 3.53e+03 R= 6e+04
-Depth= 9379 States= 2.3e+08 Transitions= 3.85e+09 Memory= 8771.799 t= 3.54e+03 R= 6e+04
-Depth= 9379 States= 2.31e+08 Transitions= 3.87e+09 Memory= 8792.600 t= 3.56e+03 R= 6e+04
-Depth= 9379 States= 2.32e+08 Transitions= 3.89e+09 Memory= 8828.733 t= 3.57e+03 R= 6e+04
-Depth= 9379 States= 2.33e+08 Transitions= 3.9e+09 Memory= 8843.869 t= 3.59e+03 R= 6e+04
-Depth= 9379 States= 2.34e+08 Transitions= 3.92e+09 Memory= 8884.787 t= 3.6e+03 R= 6e+04
-Depth= 9379 States= 2.35e+08 Transitions= 3.93e+09 Memory= 8924.240 t= 3.62e+03 R= 6e+04
-Depth= 9379 States= 2.36e+08 Transitions= 3.95e+09 Memory= 8960.276 t= 3.63e+03 R= 6e+04
-Depth= 9379 States= 2.37e+08 Transitions= 3.97e+09 Memory= 8984.494 t= 3.65e+03 R= 6e+04
-Depth= 9379 States= 2.38e+08 Transitions= 3.98e+09 Memory= 9016.428 t= 3.66e+03 R= 6e+04
-Depth= 9379 States= 2.39e+08 Transitions= 4e+09 Memory= 9077.365 t= 3.68e+03 R= 6e+04
-Depth= 9379 States= 2.4e+08 Transitions= 4.02e+09 Memory= 9143.088 t= 3.7e+03 R= 6e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 9379, errors: 0
- 88114592 states, stored (2.40192e+08 visited)
-3.782223e+09 states, matched
-4.0224152e+09 transitions (= visited+matched)
-1.4282782e+10 atomic steps
-hash conflicts: 5.384059e+08 (resolved)
-
-Stats on memory usage (in Megabytes):
- 7731.001 equivalent memory usage for states (stored*(State-vector + overhead))
- 6648.180 actual memory usage for states (compression: 85.99%)
- state-vector as stored = 51 byte + 28 byte overhead
- 2048.000 memory used for hash table (-w28)
- 457.764 memory used for DFS stack (-m10000000)
- 1.188 memory lost to fragmentation
- 9152.756 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 256, "(1)"
- line 418, "pan.___", state 286, "(1)"
- line 399, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 395, "(1)"
- line 418, "pan.___", state 425, "(1)"
- line 540, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 399, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 70, "(1)"
- line 418, "pan.___", state 100, "(1)"
- line 399, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 158, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 399, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 247, "(1)"
- line 418, "pan.___", state 277, "(1)"
- line 399, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 359, "(1)"
- line 418, "pan.___", state 389, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 3.7e+03 seconds
-pan: rate 64918.749 states/second
-pan: avg transition delay 9.1982e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-depth 15: Claim reached state 9 (line 750)
-depth 1194: Claim reached state 9 (line 749)
-Depth= 3253 States= 1e+06 Transitions= 1.06e+07 Memory= 484.416 t= 9.57 R= 1e+05
-Depth= 3253 States= 2e+06 Transitions= 2.04e+07 Memory= 501.311 t= 18.5 R= 1e+05
-pan: acceptance cycle (at depth 1938)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 64 byte, depth reached 23684, errors: 1
- 682672 states, stored (2.81536e+06 visited)
- 30226122 states, matched
- 33041487 transitions (= visited+matched)
-1.1631626e+08 atomic steps
-hash conflicts: 6056013 (resolved)
-
-Stats on memory usage (in Megabytes):
- 59.896 equivalent memory usage for states (stored*(State-vector + overhead))
- 47.456 actual memory usage for states (compression: 79.23%)
- state-vector as stored = 45 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 513.127 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 211, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 243, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 256, "(1)"
- line 419, "pan.___", state 286, "(1)"
- line 400, "pan.___", state 350, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 382, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 395, "(1)"
- line 419, "pan.___", state 425, "(1)"
- line 541, "pan.___", state 456, "-end-"
- (17 of 456 states)
-unreached in proctype urcu_reader_sig
- line 400, "pan.___", state 25, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 57, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 70, "(1)"
- line 419, "pan.___", state 100, "(1)"
- line 400, "pan.___", state 113, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 145, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 158, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 400, "pan.___", state 202, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 234, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 247, "(1)"
- line 419, "pan.___", state 277, "(1)"
- line 400, "pan.___", state 314, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 359, "(1)"
- line 419, "pan.___", state 389, "(1)"
- line 615, "pan.___", state 411, "-end-"
- (17 of 411 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 402, "pan.___", state 134, "((i<1))"
- line 402, "pan.___", state 134, "((i>=1))"
- line 410, "pan.___", state 153, "(1)"
- line 410, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 154, "else"
- line 410, "pan.___", state 157, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 414, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 167, "else"
- line 414, "pan.___", state 170, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 412, "pan.___", state 176, "((i<1))"
- line 412, "pan.___", state 176, "((i>=1))"
- line 419, "pan.___", state 183, "(1)"
- line 419, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 184, "else"
- line 419, "pan.___", state 187, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 370, "pan.___", state 193, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 647, "pan.___", state 202, "((write_lock==0))"
- line 647, "pan.___", state 202, "else"
- line 645, "pan.___", state 203, "(1)"
- line 176, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 180, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 225, "((j<1))"
- line 178, "pan.___", state 225, "((j>=1))"
- line 184, "pan.___", state 230, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 240, "(1)"
- line 165, "pan.___", state 248, "(1)"
- line 165, "pan.___", state 249, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 165, "pan.___", state 249, "else"
- line 163, "pan.___", state 254, "((j<1))"
- line 163, "pan.___", state 254, "((j>=1))"
- line 169, "pan.___", state 260, "(1)"
- line 169, "pan.___", state 261, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 169, "pan.___", state 261, "else"
- line 171, "pan.___", state 264, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 171, "pan.___", state 264, "else"
- line 176, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 180, "pan.___", state 280, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 288, "((j<1))"
- line 178, "pan.___", state 288, "((j>=1))"
- line 184, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 303, "(1)"
- line 165, "pan.___", state 311, "(1)"
- line 165, "pan.___", state 312, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 165, "pan.___", state 312, "else"
- line 163, "pan.___", state 317, "((j<1))"
- line 163, "pan.___", state 317, "((j>=1))"
- line 169, "pan.___", state 323, "(1)"
- line 169, "pan.___", state 324, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 169, "pan.___", state 324, "else"
- line 171, "pan.___", state 327, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 171, "pan.___", state 327, "else"
- line 215, "pan.___", state 333, "((i<1))"
- line 215, "pan.___", state 333, "((i>=1))"
- line 176, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 180, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 178, "pan.___", state 355, "((j<1))"
- line 178, "pan.___", state 355, "((j>=1))"
- line 184, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 370, "(1)"
- line 165, "pan.___", state 378, "(1)"
- line 165, "pan.___", state 379, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 165, "pan.___", state 379, "else"
- line 163, "pan.___", state 384, "((j<1))"
- line 163, "pan.___", state 384, "((j>=1))"
- line 169, "pan.___", state 390, "(1)"
- line 169, "pan.___", state 391, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 169, "pan.___", state 391, "else"
- line 171, "pan.___", state 394, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 171, "pan.___", state 394, "else"
- line 400, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 410, "(1)"
- line 404, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 424, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 402, "pan.___", state 430, "((i<1))"
- line 402, "pan.___", state 430, "((i>=1))"
- line 409, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 449, "(1)"
- line 410, "pan.___", state 450, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 450, "else"
- line 410, "pan.___", state 453, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 414, "pan.___", state 462, "(1)"
- line 414, "pan.___", state 463, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 463, "else"
- line 414, "pan.___", state 466, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 412, "pan.___", state 472, "((i<1))"
- line 412, "pan.___", state 472, "((i>=1))"
- line 419, "pan.___", state 479, "(1)"
- line 419, "pan.___", state 480, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 480, "else"
- line 419, "pan.___", state 483, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 370, "pan.___", state 489, "(1)"
- line 662, "pan.___", state 492, "cached_urcu_gp_ctr.val[( ((_pid<2)) ? (0) : (1) )] = (tmp^(1<<7))"
- line 400, "pan.___", state 498, "(1)"
- line 400, "pan.___", state 499, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 499, "else"
- line 400, "pan.___", state 502, "(1)"
- line 404, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 516, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 402, "pan.___", state 522, "((i<1))"
- line 402, "pan.___", state 522, "((i>=1))"
- line 409, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 541, "(1)"
- line 410, "pan.___", state 542, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 542, "else"
- line 410, "pan.___", state 545, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 414, "pan.___", state 554, "(1)"
- line 414, "pan.___", state 555, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 555, "else"
- line 414, "pan.___", state 558, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 412, "pan.___", state 564, "((i<1))"
- line 412, "pan.___", state 564, "((i>=1))"
- line 419, "pan.___", state 571, "(1)"
- line 419, "pan.___", state 572, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 572, "else"
- line 419, "pan.___", state 575, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 370, "pan.___", state 581, "(1)"
- line 400, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 595, "(1)"
- line 404, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 609, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 402, "pan.___", state 615, "((i<1))"
- line 402, "pan.___", state 615, "((i>=1))"
- line 409, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 634, "(1)"
- line 410, "pan.___", state 635, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 635, "else"
- line 410, "pan.___", state 638, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 414, "pan.___", state 647, "(1)"
- line 414, "pan.___", state 648, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 648, "else"
- line 414, "pan.___", state 651, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 412, "pan.___", state 657, "((i<1))"
- line 412, "pan.___", state 657, "((i>=1))"
- line 419, "pan.___", state 664, "(1)"
- line 419, "pan.___", state 665, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 665, "else"
- line 419, "pan.___", state 668, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 370, "pan.___", state 674, "(1)"
- line 400, "pan.___", state 679, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 681, "(1)"
- line 400, "pan.___", state 682, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 682, "else"
- line 400, "pan.___", state 685, "(1)"
- line 404, "pan.___", state 693, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 695, "(1)"
- line 404, "pan.___", state 696, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 696, "else"
- line 404, "pan.___", state 699, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 402, "pan.___", state 705, "((i<1))"
- line 402, "pan.___", state 705, "((i>=1))"
- line 409, "pan.___", state 711, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 724, "(1)"
- line 410, "pan.___", state 725, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 725, "else"
- line 410, "pan.___", state 728, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 414, "pan.___", state 737, "(1)"
- line 414, "pan.___", state 738, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 738, "else"
- line 414, "pan.___", state 741, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 412, "pan.___", state 747, "((i<1))"
- line 412, "pan.___", state 747, "((i>=1))"
- line 419, "pan.___", state 754, "(1)"
- line 419, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 755, "else"
- line 419, "pan.___", state 758, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 370, "pan.___", state 764, "(1)"
- line 430, "pan.___", state 767, "(((tmp2&((1<<7)-1))&&((tmp2^cached_urcu_gp_ctr.val[( ((_pid<2)) ? (0) : (1) )])&(1<<7))))"
- line 430, "pan.___", state 767, "else"
- line 400, "pan.___", state 777, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 779, "(1)"
- line 400, "pan.___", state 780, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 780, "else"
- line 400, "pan.___", state 783, "(1)"
- line 404, "pan.___", state 791, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 793, "(1)"
- line 404, "pan.___", state 794, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 794, "else"
- line 404, "pan.___", state 797, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 402, "pan.___", state 803, "((i<1))"
- line 402, "pan.___", state 803, "((i>=1))"
- line 409, "pan.___", state 809, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 822, "(1)"
- line 410, "pan.___", state 823, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 823, "else"
- line 410, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 414, "pan.___", state 835, "(1)"
- line 414, "pan.___", state 836, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 836, "else"
- line 414, "pan.___", state 839, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 412, "pan.___", state 845, "((i<1))"
- line 412, "pan.___", state 845, "((i>=1))"
- line 419, "pan.___", state 852, "(1)"
- line 419, "pan.___", state 853, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 853, "else"
- line 419, "pan.___", state 856, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 370, "pan.___", state 862, "(1)"
- line 449, "pan.___", state 870, "((tmp<1))"
- line 449, "pan.___", state 870, "((tmp>=1))"
- line 462, "pan.___", state 873, "tmp = 0"
- line 400, "pan.___", state 877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 883, "(1)"
- line 404, "pan.___", state 891, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 897, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 903, "((i<1))"
- line 402, "pan.___", state 903, "((i>=1))"
- line 409, "pan.___", state 909, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 922, "(1)"
- line 410, "pan.___", state 923, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 923, "else"
- line 410, "pan.___", state 926, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 414, "pan.___", state 935, "(1)"
- line 414, "pan.___", state 936, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 936, "else"
- line 414, "pan.___", state 939, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 945, "((i<1))"
- line 412, "pan.___", state 945, "((i>=1))"
- line 419, "pan.___", state 952, "(1)"
- line 419, "pan.___", state 953, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 953, "else"
- line 419, "pan.___", state 956, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 370, "pan.___", state 962, "(1)"
- line 671, "pan.___", state 963, "tmp = cached_urcu_gp_ctr.val[( ((_pid<2)) ? (0) : (1) )]"
- line 400, "pan.___", state 967, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 973, "(1)"
- line 404, "pan.___", state 981, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 987, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 402, "pan.___", state 993, "((i<1))"
- line 402, "pan.___", state 993, "((i>=1))"
- line 409, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1012, "(1)"
- line 410, "pan.___", state 1013, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1013, "else"
- line 410, "pan.___", state 1016, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 414, "pan.___", state 1025, "(1)"
- line 414, "pan.___", state 1026, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1026, "else"
- line 414, "pan.___", state 1029, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 412, "pan.___", state 1035, "((i<1))"
- line 412, "pan.___", state 1035, "((i>=1))"
- line 419, "pan.___", state 1042, "(1)"
- line 419, "pan.___", state 1043, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1043, "else"
- line 419, "pan.___", state 1046, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 370, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1061, "(1)"
- line 404, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1117, "(1)"
- line 419, "pan.___", state 1134, "(1)"
- line 404, "pan.___", state 1166, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1184, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 414, "pan.___", state 1210, "(1)"
- line 419, "pan.___", state 1227, "(1)"
- line 400, "pan.___", state 1242, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1256, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 409, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1287, "(1)"
- line 414, "pan.___", state 1300, "(1)"
- line 419, "pan.___", state 1317, "(1)"
- line 400, "pan.___", state 1340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1342, "(1)"
- line 400, "pan.___", state 1343, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 400, "pan.___", state 1343, "else"
- line 400, "pan.___", state 1346, "(1)"
- line 404, "pan.___", state 1354, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1356, "(1)"
- line 404, "pan.___", state 1357, "((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 404, "pan.___", state 1357, "else"
- line 404, "pan.___", state 1360, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 402, "pan.___", state 1366, "((i<1))"
- line 402, "pan.___", state 1366, "((i>=1))"
- line 409, "pan.___", state 1372, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 410, "pan.___", state 1385, "(1)"
- line 410, "pan.___", state 1386, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 410, "pan.___", state 1386, "else"
- line 410, "pan.___", state 1389, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 414, "pan.___", state 1398, "(1)"
- line 414, "pan.___", state 1399, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 414, "pan.___", state 1399, "else"
- line 414, "pan.___", state 1402, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 412, "pan.___", state 1408, "((i<1))"
- line 412, "pan.___", state 1408, "((i>=1))"
- line 419, "pan.___", state 1415, "(1)"
- line 419, "pan.___", state 1416, "(!((cache_dirty_generation_ptr.bitfield&(1<<( ((_pid<2)) -> (0) : (1) )))))"
- line 419, "pan.___", state 1416, "else"
- line 419, "pan.___", state 1419, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 180, "pan.___", state 1448, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 184, "pan.___", state 1461, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 1471, "(1)"
- line 165, "pan.___", state 1479, "(1)"
- line 169, "pan.___", state 1491, "(1)"
- line 176, "pan.___", state 1502, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 184, "pan.___", state 1524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 1534, "(1)"
- line 165, "pan.___", state 1542, "(1)"
- line 169, "pan.___", state 1554, "(1)"
- line 176, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 180, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 184, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<( ((_pid<2)) -> (0) : (1) ))))"
- line 161, "pan.___", state 1601, "(1)"
- line 165, "pan.___", state 1609, "(1)"
- line 169, "pan.___", state 1621, "(1)"
- line 370, "pan.___", state 1642, "(1)"
- line 696, "pan.___", state 1643, "(1)"
- line 703, "pan.___", state 1646, "-end-"
- (308 of 1646 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 752, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 30.2 seconds
-pan: rate 93347.646 states/second
-pan: avg transition delay 9.1279e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
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-23084:2:597
-23085:2:601
-23086:2:602
-23087:2:609
-23088:2:610
-23089:2:621
-23090:2:622
-23091:2:623
-23092:2:634
-23093:2:639
-23094:2:640
-23095:0:2565
-23096:3:2104
-23097:0:2565
-23098:3:2105
-23099:3:2109
-23100:3:2110
-23101:3:2118
-23102:3:2119
-23103:3:2123
-23104:3:2124
-23105:3:2132
-23106:3:2137
-23107:3:2141
-23108:3:2142
-23109:3:2149
-23110:3:2150
-23111:3:2161
-23112:3:2169
-23113:3:2170
-23114:3:2174
-23115:3:2179
-23116:3:2180
-23117:0:2565
-23118:3:2192
-23119:0:2565
-23120:3:2013
-23121:0:2565
-23122:3:2014
-23123:0:2565
-23124:3:2015
-23125:3:2019
-23126:3:2020
-23127:3:2028
-23128:3:2029
-23129:3:2033
-23130:3:2034
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-23132:3:2047
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-23137:3:2071
-23138:3:2079
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-23155:2:658
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-23192:2:765
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-23196:2:771
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-23201:2:798
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-23212:0:2565
-23213:3:2104
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-23216:3:2109
-23217:3:2110
-23218:3:2118
-23219:3:2119
-23220:3:2123
-23221:3:2124
-23222:3:2132
-23223:3:2137
-23224:3:2141
-23225:3:2142
-23226:3:2149
-23227:3:2150
-23228:3:2161
-23229:3:2169
-23230:3:2170
-23231:3:2174
-23232:3:2179
-23233:3:2180
-23234:0:2565
-23235:3:2192
-23236:0:2565
-23237:3:2013
-23238:0:2565
-23239:3:2014
-23240:0:2565
-23241:3:2015
-23242:3:2019
-23243:3:2020
-23244:3:2028
-23245:3:2029
-23246:3:2033
-23247:3:2034
-23248:3:2042
-23249:3:2047
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-23251:3:2052
-23252:3:2059
-23253:3:2060
-23254:3:2071
-23255:3:2079
-23256:3:2080
-23257:3:2084
-23258:3:2089
-23259:3:2090
-23260:0:2565
-23261:3:2102
-23262:0:2565
-23263:2:853
-23264:0:2565
-23265:2:857
-23266:0:2565
-23267:1:197
-23268:0:2565
-23269:2:465
-23270:0:2565
-23271:1:198
-23272:0:2565
-23273:3:2104
-23274:0:2565
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-23277:3:2110
-23278:3:2118
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-23280:3:2123
-23281:3:2124
-23282:3:2132
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-23284:3:2141
-23285:3:2142
-23286:3:2149
-23287:3:2150
-23288:3:2161
-23289:3:2169
-23290:3:2170
-23291:3:2174
-23292:3:2179
-23293:3:2180
-23294:0:2565
-23295:3:2192
-23296:0:2565
-23297:3:2013
-23298:0:2565
-23299:3:2014
-23300:0:2565
-23301:3:2015
-23302:3:2019
-23303:3:2020
-23304:3:2028
-23305:3:2029
-23306:3:2033
-23307:3:2034
-23308:3:2042
-23309:3:2047
-23310:3:2051
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-23312:3:2059
-23313:3:2060
-23314:3:2071
-23315:3:2079
-23316:3:2080
-23317:3:2084
-23318:3:2089
-23319:3:2090
-23320:0:2565
-23321:3:2102
-23322:0:2565
-23323:1:197
-23324:0:2565
-23325:3:2104
-23326:0:2565
-23327:3:2105
-23328:3:2109
-23329:3:2110
-23330:3:2118
-23331:3:2119
-23332:3:2123
-23333:3:2124
-23334:3:2132
-23335:3:2137
-23336:3:2141
-23337:3:2142
-23338:3:2149
-23339:3:2150
-23340:3:2161
-23341:3:2169
-23342:3:2170
-23343:3:2174
-23344:3:2179
-23345:3:2180
-23346:0:2565
-23347:3:2192
-23348:0:2565
-23349:3:2013
-23350:0:2565
-23351:3:2014
-23352:0:2565
-23353:3:2015
-23354:3:2019
-23355:3:2020
-23356:3:2028
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-23358:3:2033
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-23365:3:2060
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-23367:3:2079
-23368:3:2080
-23369:3:2084
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-23371:3:2090
-23372:0:2565
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-23376:0:2565
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-23384:3:2118
-23385:3:2119
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-23402:0:2565
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-23404:0:2565
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-23406:0:2565
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-23436:3:2118
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-23439:3:2124
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-23443:3:2142
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-23447:3:2169
-23448:3:2170
-23449:3:2174
-23450:3:2179
-23451:3:2180
-23452:0:2565
-23453:3:2192
-23454:0:2565
-23455:3:2013
-23456:0:2565
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-23458:0:2565
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-23461:3:2020
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-23504:3:2170
-23505:3:2174
-23506:3:2179
-23507:3:2180
-23508:0:2565
-23509:3:2192
-23510:0:2565
-23511:3:2013
-23512:0:2565
-23513:3:2014
-23514:0:2565
-23515:3:2015
-23516:3:2019
-23517:3:2020
-23518:3:2028
-23519:3:2029
-23520:3:2033
-23521:3:2034
-23522:3:2042
-23523:3:2047
-23524:3:2051
-23525:3:2052
-23526:3:2059
-23527:3:2060
-23528:3:2071
-23529:3:2079
-23530:3:2080
-23531:3:2084
-23532:3:2089
-23533:3:2090
-23534:0:2565
-23535:3:2102
-23536:0:2565
-23537:2:467
-23538:0:2565
-23539:2:468
-23540:0:2565
-23541:3:2104
-23542:0:2565
-23543:3:2105
-23544:3:2109
-23545:3:2110
-23546:3:2118
-23547:3:2119
-23548:3:2123
-23549:3:2124
-23550:3:2132
-23551:3:2137
-23552:3:2141
-23553:3:2142
-23554:3:2149
-23555:3:2150
-23556:3:2161
-23557:3:2169
-23558:3:2170
-23559:3:2174
-23560:3:2179
-23561:3:2180
-23562:0:2565
-23563:3:2192
-23564:0:2565
-23565:3:2013
-23566:0:2565
-23567:3:2014
-23568:0:2565
-23569:1:206
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 40 byte, depth reached 7872, errors: 0
- 20128 states, stored
- 191477 states, matched
- 211605 transitions (= stored+matched)
- 712166 atomic steps
-hash conflicts: 942 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.305 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.467 actual memory usage for states (unsuccessful compression: 112.36%)
- state-vector as stored = 48 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.229 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 401, ".input.spin", state 330, "(1)"
- line 612, ".input.spin", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 397, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 406, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 59, "(1)"
- line 416, ".input.spin", state 89, "(1)"
- line 397, ".input.spin", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 160, "(1)"
- line 650, ".input.spin", state 213, "(1)"
- line 173, ".input.spin", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 233, "(1)"
- line 158, ".input.spin", state 254, "(1)"
- line 162, ".input.spin", state 262, "(1)"
- line 166, ".input.spin", state 274, "(1)"
- line 173, ".input.spin", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 317, "(1)"
- line 162, ".input.spin", state 325, "(1)"
- line 166, ".input.spin", state 337, "(1)"
- line 173, ".input.spin", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 384, "(1)"
- line 162, ".input.spin", state 392, "(1)"
- line 166, ".input.spin", state 404, "(1)"
- line 397, ".input.spin", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 441, "(1)"
- line 406, ".input.spin", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 470, "(1)"
- line 416, ".input.spin", state 500, "(1)"
- line 397, ".input.spin", state 526, "(1)"
- line 401, ".input.spin", state 540, "(1)"
- line 406, ".input.spin", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 599, "(1)"
- line 401, ".input.spin", state 640, "(1)"
- line 406, ".input.spin", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 699, "(1)"
- line 173, ".input.spin", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 722, "(1)"
- line 177, ".input.spin", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 731, "(1)"
- line 177, ".input.spin", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 732, "else"
- line 175, ".input.spin", state 737, "((j<1))"
- line 175, ".input.spin", state 737, "((j>=1))"
- line 181, ".input.spin", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 752, "(1)"
- line 162, ".input.spin", state 760, "(1)"
- line 162, ".input.spin", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 761, "else"
- line 160, ".input.spin", state 766, "((j<1))"
- line 160, ".input.spin", state 766, "((j>=1))"
- line 166, ".input.spin", state 772, "(1)"
- line 166, ".input.spin", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 773, "else"
- line 168, ".input.spin", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 776, "else"
- line 173, ".input.spin", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 785, "(1)"
- line 177, ".input.spin", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 794, "(1)"
- line 177, ".input.spin", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 795, "else"
- line 175, ".input.spin", state 800, "((j<1))"
- line 175, ".input.spin", state 800, "((j>=1))"
- line 181, ".input.spin", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 815, "(1)"
- line 162, ".input.spin", state 823, "(1)"
- line 162, ".input.spin", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 824, "else"
- line 160, ".input.spin", state 829, "((j<1))"
- line 160, ".input.spin", state 829, "((j>=1))"
- line 166, ".input.spin", state 835, "(1)"
- line 166, ".input.spin", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 836, "else"
- line 168, ".input.spin", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 839, "else"
- line 200, ".input.spin", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 841, "else"
- line 212, ".input.spin", state 845, "((i<1))"
- line 212, ".input.spin", state 845, "((i>=1))"
- line 173, ".input.spin", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 852, "(1)"
- line 177, ".input.spin", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 861, "(1)"
- line 177, ".input.spin", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 862, "else"
- line 175, ".input.spin", state 867, "((j<1))"
- line 175, ".input.spin", state 867, "((j>=1))"
- line 181, ".input.spin", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 882, "(1)"
- line 162, ".input.spin", state 890, "(1)"
- line 162, ".input.spin", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 891, "else"
- line 160, ".input.spin", state 896, "((j<1))"
- line 160, ".input.spin", state 896, "((j>=1))"
- line 166, ".input.spin", state 902, "(1)"
- line 166, ".input.spin", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 903, "else"
- line 168, ".input.spin", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 906, "else"
- line 200, ".input.spin", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 908, "else"
- line 219, ".input.spin", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 909, "else"
- line 354, ".input.spin", state 915, "((sighand_exec==1))"
- line 354, ".input.spin", state 915, "else"
- line 360, ".input.spin", state 918, "sighand_exec = 1"
- line 397, ".input.spin", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 933, "(1)"
- line 397, ".input.spin", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 934, "else"
- line 397, ".input.spin", state 937, "(1)"
- line 401, ".input.spin", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 947, "(1)"
- line 401, ".input.spin", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 948, "else"
- line 401, ".input.spin", state 951, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 399, ".input.spin", state 957, "((i<1))"
- line 399, ".input.spin", state 957, "((i>=1))"
- line 406, ".input.spin", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 976, "(1)"
- line 407, ".input.spin", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 977, "else"
- line 407, ".input.spin", state 980, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 411, ".input.spin", state 989, "(1)"
- line 411, ".input.spin", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 990, "else"
- line 411, ".input.spin", state 993, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 409, ".input.spin", state 999, "((i<1))"
- line 409, ".input.spin", state 999, "((i>=1))"
- line 416, ".input.spin", state 1006, "(1)"
- line 416, ".input.spin", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1007, "else"
- line 416, ".input.spin", state 1010, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 360, ".input.spin", state 1023, "sighand_exec = 1"
- line 401, ".input.spin", state 1054, "(1)"
- line 406, ".input.spin", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1113, "(1)"
- line 401, ".input.spin", state 1151, "(1)"
- line 406, ".input.spin", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1210, "(1)"
- line 397, ".input.spin", state 1236, "(1)"
- line 401, ".input.spin", state 1250, "(1)"
- line 406, ".input.spin", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1309, "(1)"
- line 401, ".input.spin", state 1350, "(1)"
- line 406, ".input.spin", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1409, "(1)"
- line 173, ".input.spin", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1432, "(1)"
- line 177, ".input.spin", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1441, "(1)"
- line 177, ".input.spin", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1442, "else"
- line 175, ".input.spin", state 1447, "((j<1))"
- line 175, ".input.spin", state 1447, "((j>=1))"
- line 181, ".input.spin", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1462, "(1)"
- line 162, ".input.spin", state 1470, "(1)"
- line 162, ".input.spin", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1471, "else"
- line 160, ".input.spin", state 1476, "((j<1))"
- line 160, ".input.spin", state 1476, "((j>=1))"
- line 166, ".input.spin", state 1482, "(1)"
- line 166, ".input.spin", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1483, "else"
- line 168, ".input.spin", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1486, "else"
- line 173, ".input.spin", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 1495, "(1)"
- line 177, ".input.spin", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1504, "(1)"
- line 177, ".input.spin", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 1505, "else"
- line 175, ".input.spin", state 1510, "((j<1))"
- line 175, ".input.spin", state 1510, "((j>=1))"
- line 181, ".input.spin", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1525, "(1)"
- line 162, ".input.spin", state 1533, "(1)"
- line 162, ".input.spin", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 1534, "else"
- line 160, ".input.spin", state 1539, "((j<1))"
- line 160, ".input.spin", state 1539, "((j>=1))"
- line 166, ".input.spin", state 1545, "(1)"
- line 166, ".input.spin", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 1546, "else"
- line 168, ".input.spin", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 1549, "else"
- line 200, ".input.spin", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 1551, "else"
- line 212, ".input.spin", state 1555, "((i<1))"
- line 212, ".input.spin", state 1555, "((i>=1))"
- line 173, ".input.spin", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1562, "(1)"
- line 177, ".input.spin", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1571, "(1)"
- line 177, ".input.spin", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1572, "else"
- line 175, ".input.spin", state 1577, "((j<1))"
- line 175, ".input.spin", state 1577, "((j>=1))"
- line 181, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1592, "(1)"
- line 162, ".input.spin", state 1600, "(1)"
- line 162, ".input.spin", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1601, "else"
- line 160, ".input.spin", state 1606, "((j<1))"
- line 160, ".input.spin", state 1606, "((j>=1))"
- line 166, ".input.spin", state 1612, "(1)"
- line 166, ".input.spin", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1613, "else"
- line 168, ".input.spin", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1616, "else"
- line 200, ".input.spin", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 1618, "else"
- line 219, ".input.spin", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 1619, "else"
- line 354, ".input.spin", state 1625, "((sighand_exec==1))"
- line 354, ".input.spin", state 1625, "else"
- line 360, ".input.spin", state 1628, "sighand_exec = 1"
- line 397, ".input.spin", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 1643, "(1)"
- line 397, ".input.spin", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 1644, "else"
- line 397, ".input.spin", state 1647, "(1)"
- line 401, ".input.spin", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 1657, "(1)"
- line 401, ".input.spin", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 1658, "else"
- line 401, ".input.spin", state 1661, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 399, ".input.spin", state 1667, "((i<1))"
- line 399, ".input.spin", state 1667, "((i>=1))"
- line 406, ".input.spin", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 1686, "(1)"
- line 407, ".input.spin", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 1687, "else"
- line 407, ".input.spin", state 1690, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 411, ".input.spin", state 1699, "(1)"
- line 411, ".input.spin", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 1700, "else"
- line 411, ".input.spin", state 1703, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 409, ".input.spin", state 1709, "((i<1))"
- line 409, ".input.spin", state 1709, "((i>=1))"
- line 416, ".input.spin", state 1716, "(1)"
- line 416, ".input.spin", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1717, "else"
- line 416, ".input.spin", state 1720, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 360, ".input.spin", state 1733, "sighand_exec = 1"
- line 177, ".input.spin", state 1758, "(1)"
- line 181, ".input.spin", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1779, "(1)"
- line 162, ".input.spin", state 1787, "(1)"
- line 166, ".input.spin", state 1799, "(1)"
- line 173, ".input.spin", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1842, "(1)"
- line 162, ".input.spin", state 1850, "(1)"
- line 166, ".input.spin", state 1862, "(1)"
- line 173, ".input.spin", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1909, "(1)"
- line 162, ".input.spin", state 1917, "(1)"
- line 166, ".input.spin", state 1929, "(1)"
- line 700, ".input.spin", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 0.12 seconds
-pan: rate 167733.33 states/second
-pan: avg transition delay 5.6709e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 40 byte, depth reached 7872, errors: 0
- 20128 states, stored
- 191477 states, matched
- 211605 transitions (= stored+matched)
- 712166 atomic steps
-hash conflicts: 942 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.305 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.467 actual memory usage for states (unsuccessful compression: 112.36%)
- state-vector as stored = 48 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.229 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 401, ".input.spin", state 330, "(1)"
- line 612, ".input.spin", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 397, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 406, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 59, "(1)"
- line 416, ".input.spin", state 89, "(1)"
- line 397, ".input.spin", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 160, "(1)"
- line 650, ".input.spin", state 213, "(1)"
- line 173, ".input.spin", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 233, "(1)"
- line 158, ".input.spin", state 254, "(1)"
- line 162, ".input.spin", state 262, "(1)"
- line 166, ".input.spin", state 274, "(1)"
- line 173, ".input.spin", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 317, "(1)"
- line 162, ".input.spin", state 325, "(1)"
- line 166, ".input.spin", state 337, "(1)"
- line 173, ".input.spin", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 384, "(1)"
- line 162, ".input.spin", state 392, "(1)"
- line 166, ".input.spin", state 404, "(1)"
- line 397, ".input.spin", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 441, "(1)"
- line 406, ".input.spin", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 470, "(1)"
- line 416, ".input.spin", state 500, "(1)"
- line 397, ".input.spin", state 526, "(1)"
- line 401, ".input.spin", state 540, "(1)"
- line 406, ".input.spin", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 599, "(1)"
- line 401, ".input.spin", state 640, "(1)"
- line 406, ".input.spin", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 699, "(1)"
- line 173, ".input.spin", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 722, "(1)"
- line 177, ".input.spin", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 731, "(1)"
- line 177, ".input.spin", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 732, "else"
- line 175, ".input.spin", state 737, "((j<1))"
- line 175, ".input.spin", state 737, "((j>=1))"
- line 181, ".input.spin", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 752, "(1)"
- line 162, ".input.spin", state 760, "(1)"
- line 162, ".input.spin", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 761, "else"
- line 160, ".input.spin", state 766, "((j<1))"
- line 160, ".input.spin", state 766, "((j>=1))"
- line 166, ".input.spin", state 772, "(1)"
- line 166, ".input.spin", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 773, "else"
- line 168, ".input.spin", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 776, "else"
- line 173, ".input.spin", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 785, "(1)"
- line 177, ".input.spin", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 794, "(1)"
- line 177, ".input.spin", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 795, "else"
- line 175, ".input.spin", state 800, "((j<1))"
- line 175, ".input.spin", state 800, "((j>=1))"
- line 181, ".input.spin", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 815, "(1)"
- line 162, ".input.spin", state 823, "(1)"
- line 162, ".input.spin", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 824, "else"
- line 160, ".input.spin", state 829, "((j<1))"
- line 160, ".input.spin", state 829, "((j>=1))"
- line 166, ".input.spin", state 835, "(1)"
- line 166, ".input.spin", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 836, "else"
- line 168, ".input.spin", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 839, "else"
- line 200, ".input.spin", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 841, "else"
- line 212, ".input.spin", state 845, "((i<1))"
- line 212, ".input.spin", state 845, "((i>=1))"
- line 173, ".input.spin", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 852, "(1)"
- line 177, ".input.spin", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 861, "(1)"
- line 177, ".input.spin", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 862, "else"
- line 175, ".input.spin", state 867, "((j<1))"
- line 175, ".input.spin", state 867, "((j>=1))"
- line 181, ".input.spin", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 882, "(1)"
- line 162, ".input.spin", state 890, "(1)"
- line 162, ".input.spin", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 891, "else"
- line 160, ".input.spin", state 896, "((j<1))"
- line 160, ".input.spin", state 896, "((j>=1))"
- line 166, ".input.spin", state 902, "(1)"
- line 166, ".input.spin", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 903, "else"
- line 168, ".input.spin", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 906, "else"
- line 200, ".input.spin", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 908, "else"
- line 219, ".input.spin", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 909, "else"
- line 354, ".input.spin", state 915, "((sighand_exec==1))"
- line 354, ".input.spin", state 915, "else"
- line 360, ".input.spin", state 918, "sighand_exec = 1"
- line 397, ".input.spin", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 933, "(1)"
- line 397, ".input.spin", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 934, "else"
- line 397, ".input.spin", state 937, "(1)"
- line 401, ".input.spin", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 947, "(1)"
- line 401, ".input.spin", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 948, "else"
- line 401, ".input.spin", state 951, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 401, ".input.spin", state 952, "(1)"
- line 399, ".input.spin", state 957, "((i<1))"
- line 399, ".input.spin", state 957, "((i>=1))"
- line 406, ".input.spin", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 976, "(1)"
- line 407, ".input.spin", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 977, "else"
- line 407, ".input.spin", state 980, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 407, ".input.spin", state 981, "(1)"
- line 411, ".input.spin", state 989, "(1)"
- line 411, ".input.spin", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 990, "else"
- line 411, ".input.spin", state 993, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 411, ".input.spin", state 994, "(1)"
- line 409, ".input.spin", state 999, "((i<1))"
- line 409, ".input.spin", state 999, "((i>=1))"
- line 416, ".input.spin", state 1006, "(1)"
- line 416, ".input.spin", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1007, "else"
- line 416, ".input.spin", state 1010, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 416, ".input.spin", state 1011, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 418, ".input.spin", state 1014, "(1)"
- line 360, ".input.spin", state 1023, "sighand_exec = 1"
- line 401, ".input.spin", state 1054, "(1)"
- line 406, ".input.spin", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1113, "(1)"
- line 401, ".input.spin", state 1151, "(1)"
- line 406, ".input.spin", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1210, "(1)"
- line 397, ".input.spin", state 1236, "(1)"
- line 401, ".input.spin", state 1250, "(1)"
- line 406, ".input.spin", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1309, "(1)"
- line 401, ".input.spin", state 1350, "(1)"
- line 406, ".input.spin", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, ".input.spin", state 1409, "(1)"
- line 173, ".input.spin", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1432, "(1)"
- line 177, ".input.spin", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1441, "(1)"
- line 177, ".input.spin", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1442, "else"
- line 175, ".input.spin", state 1447, "((j<1))"
- line 175, ".input.spin", state 1447, "((j>=1))"
- line 181, ".input.spin", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1462, "(1)"
- line 162, ".input.spin", state 1470, "(1)"
- line 162, ".input.spin", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1471, "else"
- line 160, ".input.spin", state 1476, "((j<1))"
- line 160, ".input.spin", state 1476, "((j>=1))"
- line 166, ".input.spin", state 1482, "(1)"
- line 166, ".input.spin", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1483, "else"
- line 168, ".input.spin", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1486, "else"
- line 173, ".input.spin", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, ".input.spin", state 1495, "(1)"
- line 177, ".input.spin", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1504, "(1)"
- line 177, ".input.spin", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, ".input.spin", state 1505, "else"
- line 175, ".input.spin", state 1510, "((j<1))"
- line 175, ".input.spin", state 1510, "((j>=1))"
- line 181, ".input.spin", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1525, "(1)"
- line 162, ".input.spin", state 1533, "(1)"
- line 162, ".input.spin", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, ".input.spin", state 1534, "else"
- line 160, ".input.spin", state 1539, "((j<1))"
- line 160, ".input.spin", state 1539, "((j>=1))"
- line 166, ".input.spin", state 1545, "(1)"
- line 166, ".input.spin", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, ".input.spin", state 1546, "else"
- line 168, ".input.spin", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, ".input.spin", state 1549, "else"
- line 200, ".input.spin", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, ".input.spin", state 1551, "else"
- line 212, ".input.spin", state 1555, "((i<1))"
- line 212, ".input.spin", state 1555, "((i>=1))"
- line 173, ".input.spin", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, ".input.spin", state 1562, "(1)"
- line 177, ".input.spin", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1571, "(1)"
- line 177, ".input.spin", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, ".input.spin", state 1572, "else"
- line 175, ".input.spin", state 1577, "((j<1))"
- line 175, ".input.spin", state 1577, "((j>=1))"
- line 181, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1592, "(1)"
- line 162, ".input.spin", state 1600, "(1)"
- line 162, ".input.spin", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, ".input.spin", state 1601, "else"
- line 160, ".input.spin", state 1606, "((j<1))"
- line 160, ".input.spin", state 1606, "((j>=1))"
- line 166, ".input.spin", state 1612, "(1)"
- line 166, ".input.spin", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, ".input.spin", state 1613, "else"
- line 168, ".input.spin", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, ".input.spin", state 1616, "else"
- line 200, ".input.spin", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, ".input.spin", state 1618, "else"
- line 219, ".input.spin", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, ".input.spin", state 1619, "else"
- line 354, ".input.spin", state 1625, "((sighand_exec==1))"
- line 354, ".input.spin", state 1625, "else"
- line 360, ".input.spin", state 1628, "sighand_exec = 1"
- line 397, ".input.spin", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, ".input.spin", state 1643, "(1)"
- line 397, ".input.spin", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, ".input.spin", state 1644, "else"
- line 397, ".input.spin", state 1647, "(1)"
- line 401, ".input.spin", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, ".input.spin", state 1657, "(1)"
- line 401, ".input.spin", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, ".input.spin", state 1658, "else"
- line 401, ".input.spin", state 1661, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 401, ".input.spin", state 1662, "(1)"
- line 399, ".input.spin", state 1667, "((i<1))"
- line 399, ".input.spin", state 1667, "((i>=1))"
- line 406, ".input.spin", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, ".input.spin", state 1686, "(1)"
- line 407, ".input.spin", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, ".input.spin", state 1687, "else"
- line 407, ".input.spin", state 1690, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 407, ".input.spin", state 1691, "(1)"
- line 411, ".input.spin", state 1699, "(1)"
- line 411, ".input.spin", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, ".input.spin", state 1700, "else"
- line 411, ".input.spin", state 1703, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 411, ".input.spin", state 1704, "(1)"
- line 409, ".input.spin", state 1709, "((i<1))"
- line 409, ".input.spin", state 1709, "((i>=1))"
- line 416, ".input.spin", state 1716, "(1)"
- line 416, ".input.spin", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, ".input.spin", state 1717, "else"
- line 416, ".input.spin", state 1720, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 416, ".input.spin", state 1721, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 418, ".input.spin", state 1724, "(1)"
- line 360, ".input.spin", state 1733, "sighand_exec = 1"
- line 177, ".input.spin", state 1758, "(1)"
- line 181, ".input.spin", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1779, "(1)"
- line 162, ".input.spin", state 1787, "(1)"
- line 166, ".input.spin", state 1799, "(1)"
- line 173, ".input.spin", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, ".input.spin", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, ".input.spin", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, ".input.spin", state 1842, "(1)"
- line 162, ".input.spin", state 1850, "(1)"
- line 166, ".input.spin", state 1862, "(1)"
- line 173, ".input.spin", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, ".input.spin", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, ".input.spin", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, ".input.spin", state 1909, "(1)"
- line 162, ".input.spin", state 1917, "(1)"
- line 166, ".input.spin", state 1929, "(1)"
- line 700, ".input.spin", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 0.12 seconds
-pan: rate 167733.33 states/second
-pan: avg transition delay 5.6709e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-
-#define NR_READERS 2
-#define NR_WRITERS 1
-
-#define NR_PROCS 3
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-
-#define NR_READERS 2
-#define NR_WRITERS 1
-
-#define NR_PROCS 3
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-spin: line 295 replacement value: tmp
-spin: line 295 ".input.spin", Error: formal par of wait_for_quiescent_state contains replacement value saw '-2'' near 'readerid'
-spin: 1 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_WRITERS 1
-#define NR_READERS 3
-
-/* Number of reader and writer processes */
-#define NR_PROCS 5
-
-/* Includes reader, writer and init process */
-#define MAX_NR_PROCS 5
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
- skip;
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
- skip;
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_writerid() (get_pid())
-#define get_readerid() (get_writerrid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- skip;
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2, nest)
-{
- nest_i = 0;
- do
- :: nest_i < nest ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- ooo_mem(i);
- smp_mb(i);
- nest_i++;
- :: nest_i >= nest -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < nest ->
- ooo_mem(i);
- smp_mb(i);
- ooo_mem(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= nest -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [2] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2, 2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [1] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- ooo_mem(i);
- smp_mb(i);
- ooo_mem(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 566)
-Depth= 4234 States= 1e+06 Transitions= 1.7e+07 Memory= 527.287 t= 31.3 R= 3e+04
-Depth= 4234 States= 2e+06 Transitions= 3.44e+07 Memory= 588.322 t= 63.9 R= 3e+04
-Depth= 4234 States= 3e+06 Transitions= 5.2e+07 Memory= 649.358 t= 97 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 4234 States= 4e+06 Transitions= 6.97e+07 Memory= 741.416 t= 130 R= 3e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4234, errors: 0
- 4027146 states, stored
- 66145121 states, matched
- 70172267 transitions (= stored+matched)
-2.6437688e+08 atomic steps
-hash conflicts: 47318190 (resolved)
-
-Stats on memory usage (in Megabytes):
- 322.609 equivalent memory usage for states (stored*(State-vector + overhead))
- 253.418 actual memory usage for states (compression: 78.55%)
- state-vector as stored = 38 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 743.076 total actual memory usage
-
-unreached in proctype urcu_reader
- line 288, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 61, "(1)"
- line 307, "pan.___", state 91, "(1)"
- line 288, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 149, "(1)"
- line 307, "pan.___", state 179, "(1)"
- line 288, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 238, "(1)"
- line 307, "pan.___", state 268, "(1)"
- line 158, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 291, "(1)"
- line 162, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 300, "(1)"
- line 162, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 301, "else"
- line 160, "pan.___", state 306, "((j<1))"
- line 160, "pan.___", state 306, "((j>=1))"
- line 166, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 321, "(1)"
- line 147, "pan.___", state 329, "(1)"
- line 147, "pan.___", state 330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 330, "else"
- line 145, "pan.___", state 335, "((j<1))"
- line 145, "pan.___", state 335, "((j>=1))"
- line 151, "pan.___", state 341, "(1)"
- line 151, "pan.___", state 342, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 342, "else"
- line 153, "pan.___", state 345, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 345, "else"
- line 185, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 347, "else"
- line 158, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 354, "(1)"
- line 162, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 363, "(1)"
- line 162, "pan.___", state 364, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 364, "else"
- line 160, "pan.___", state 369, "((j<1))"
- line 160, "pan.___", state 369, "((j>=1))"
- line 166, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 384, "(1)"
- line 147, "pan.___", state 392, "(1)"
- line 147, "pan.___", state 393, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 393, "else"
- line 145, "pan.___", state 398, "((j<1))"
- line 145, "pan.___", state 398, "((j>=1))"
- line 151, "pan.___", state 404, "(1)"
- line 151, "pan.___", state 405, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 405, "else"
- line 153, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 408, "else"
- line 185, "pan.___", state 410, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 410, "else"
- line 199, "pan.___", state 414, "((i<1))"
- line 199, "pan.___", state 414, "((i>=1))"
- line 158, "pan.___", state 419, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 421, "(1)"
- line 162, "pan.___", state 428, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 430, "(1)"
- line 162, "pan.___", state 431, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 431, "else"
- line 160, "pan.___", state 436, "((j<1))"
- line 160, "pan.___", state 436, "((j>=1))"
- line 166, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 451, "(1)"
- line 147, "pan.___", state 459, "(1)"
- line 147, "pan.___", state 460, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 460, "else"
- line 145, "pan.___", state 465, "((j<1))"
- line 145, "pan.___", state 465, "((j>=1))"
- line 151, "pan.___", state 471, "(1)"
- line 151, "pan.___", state 472, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 472, "else"
- line 153, "pan.___", state 475, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 475, "else"
- line 185, "pan.___", state 477, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 477, "else"
- line 288, "pan.___", state 492, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 537, "(1)"
- line 307, "pan.___", state 567, "(1)"
- line 288, "pan.___", state 580, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 612, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 625, "(1)"
- line 307, "pan.___", state 655, "(1)"
- line 288, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 713, "(1)"
- line 307, "pan.___", state 743, "(1)"
- line 158, "pan.___", state 758, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 760, "(1)"
- line 162, "pan.___", state 767, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 769, "(1)"
- line 162, "pan.___", state 770, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 770, "else"
- line 160, "pan.___", state 775, "((j<1))"
- line 160, "pan.___", state 775, "((j>=1))"
- line 166, "pan.___", state 780, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 790, "(1)"
- line 147, "pan.___", state 798, "(1)"
- line 147, "pan.___", state 799, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 799, "else"
- line 145, "pan.___", state 804, "((j<1))"
- line 145, "pan.___", state 804, "((j>=1))"
- line 151, "pan.___", state 810, "(1)"
- line 151, "pan.___", state 811, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 811, "else"
- line 153, "pan.___", state 814, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 814, "else"
- line 185, "pan.___", state 816, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 816, "else"
- line 158, "pan.___", state 821, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 823, "(1)"
- line 162, "pan.___", state 830, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 832, "(1)"
- line 162, "pan.___", state 833, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 833, "else"
- line 160, "pan.___", state 838, "((j<1))"
- line 160, "pan.___", state 838, "((j>=1))"
- line 166, "pan.___", state 843, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 853, "(1)"
- line 147, "pan.___", state 861, "(1)"
- line 147, "pan.___", state 862, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 862, "else"
- line 145, "pan.___", state 867, "((j<1))"
- line 145, "pan.___", state 867, "((j>=1))"
- line 151, "pan.___", state 873, "(1)"
- line 151, "pan.___", state 874, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 874, "else"
- line 153, "pan.___", state 877, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 877, "else"
- line 185, "pan.___", state 879, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 879, "else"
- line 199, "pan.___", state 883, "((i<1))"
- line 199, "pan.___", state 883, "((i>=1))"
- line 158, "pan.___", state 888, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 890, "(1)"
- line 162, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 899, "(1)"
- line 162, "pan.___", state 900, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 900, "else"
- line 160, "pan.___", state 905, "((j<1))"
- line 160, "pan.___", state 905, "((j>=1))"
- line 166, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 920, "(1)"
- line 147, "pan.___", state 928, "(1)"
- line 147, "pan.___", state 929, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 929, "else"
- line 145, "pan.___", state 934, "((j<1))"
- line 145, "pan.___", state 934, "((j>=1))"
- line 151, "pan.___", state 940, "(1)"
- line 151, "pan.___", state 941, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 941, "else"
- line 153, "pan.___", state 944, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 944, "else"
- line 185, "pan.___", state 946, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 946, "else"
- line 288, "pan.___", state 956, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 988, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1001, "(1)"
- line 307, "pan.___", state 1031, "(1)"
- line 288, "pan.___", state 1052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1084, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1097, "(1)"
- line 307, "pan.___", state 1127, "(1)"
- line 433, "pan.___", state 1140, "-end-"
- (125 of 1140 states)
-unreached in proctype urcu_writer
- line 288, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 59, "(1)"
- line 302, "pan.___", state 72, "(1)"
- line 307, "pan.___", state 89, "(1)"
- line 288, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 151, "(1)"
- line 302, "pan.___", state 164, "(1)"
- line 467, "pan.___", state 195, "(1)"
- line 158, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 237, "(1)"
- line 147, "pan.___", state 245, "(1)"
- line 151, "pan.___", state 257, "(1)"
- line 158, "pan.___", state 268, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 290, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 300, "(1)"
- line 147, "pan.___", state 308, "(1)"
- line 151, "pan.___", state 320, "(1)"
- line 158, "pan.___", state 335, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 344, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 357, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 367, "(1)"
- line 147, "pan.___", state 375, "(1)"
- line 151, "pan.___", state 387, "(1)"
- line 288, "pan.___", state 403, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 448, "(1)"
- line 302, "pan.___", state 461, "(1)"
- line 307, "pan.___", state 478, "(1)"
- line 288, "pan.___", state 495, "(1)"
- line 292, "pan.___", state 507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 525, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 551, "(1)"
- line 307, "pan.___", state 568, "(1)"
- line 292, "pan.___", state 598, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 642, "(1)"
- line 307, "pan.___", state 659, "(1)"
- line 162, "pan.___", state 681, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 694, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 704, "(1)"
- line 147, "pan.___", state 712, "(1)"
- line 151, "pan.___", state 724, "(1)"
- line 158, "pan.___", state 735, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 757, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 767, "(1)"
- line 147, "pan.___", state 775, "(1)"
- line 151, "pan.___", state 787, "(1)"
- line 158, "pan.___", state 802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 811, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 824, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 834, "(1)"
- line 147, "pan.___", state 842, "(1)"
- line 151, "pan.___", state 854, "(1)"
- line 288, "pan.___", state 878, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 880, "(1)"
- line 288, "pan.___", state 881, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 881, "else"
- line 288, "pan.___", state 884, "(1)"
- line 292, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 894, "(1)"
- line 292, "pan.___", state 895, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 895, "else"
- line 292, "pan.___", state 898, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 290, "pan.___", state 904, "((i<1))"
- line 290, "pan.___", state 904, "((i>=1))"
- line 297, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 923, "(1)"
- line 298, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 924, "else"
- line 298, "pan.___", state 927, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 302, "pan.___", state 936, "(1)"
- line 302, "pan.___", state 937, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 937, "else"
- line 302, "pan.___", state 940, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 300, "pan.___", state 946, "((i<1))"
- line 300, "pan.___", state 946, "((i>=1))"
- line 307, "pan.___", state 953, "(1)"
- line 307, "pan.___", state 954, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 954, "else"
- line 307, "pan.___", state 957, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 292, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1008, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1034, "(1)"
- line 307, "pan.___", state 1051, "(1)"
- line 292, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1096, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1122, "(1)"
- line 307, "pan.___", state 1139, "(1)"
- line 288, "pan.___", state 1156, "(1)"
- line 292, "pan.___", state 1168, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1186, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1212, "(1)"
- line 307, "pan.___", state 1229, "(1)"
- line 292, "pan.___", state 1259, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1277, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1303, "(1)"
- line 307, "pan.___", state 1320, "(1)"
- line 162, "pan.___", state 1342, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1355, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1365, "(1)"
- line 147, "pan.___", state 1373, "(1)"
- line 151, "pan.___", state 1385, "(1)"
- line 158, "pan.___", state 1396, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1418, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1428, "(1)"
- line 147, "pan.___", state 1436, "(1)"
- line 151, "pan.___", state 1448, "(1)"
- line 158, "pan.___", state 1463, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1472, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1485, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1495, "(1)"
- line 147, "pan.___", state 1503, "(1)"
- line 151, "pan.___", state 1515, "(1)"
- line 288, "pan.___", state 1539, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 1541, "(1)"
- line 288, "pan.___", state 1542, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 1542, "else"
- line 288, "pan.___", state 1545, "(1)"
- line 292, "pan.___", state 1553, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 1555, "(1)"
- line 292, "pan.___", state 1556, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 1556, "else"
- line 292, "pan.___", state 1559, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 290, "pan.___", state 1565, "((i<1))"
- line 290, "pan.___", state 1565, "((i>=1))"
- line 297, "pan.___", state 1571, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1584, "(1)"
- line 298, "pan.___", state 1585, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 1585, "else"
- line 298, "pan.___", state 1588, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 302, "pan.___", state 1597, "(1)"
- line 302, "pan.___", state 1598, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 1598, "else"
- line 302, "pan.___", state 1601, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 300, "pan.___", state 1607, "((i<1))"
- line 300, "pan.___", state 1607, "((i>=1))"
- line 307, "pan.___", state 1614, "(1)"
- line 307, "pan.___", state 1615, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 1615, "else"
- line 307, "pan.___", state 1618, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 162, "pan.___", state 1646, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1659, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1669, "(1)"
- line 147, "pan.___", state 1677, "(1)"
- line 151, "pan.___", state 1689, "(1)"
- line 158, "pan.___", state 1700, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1722, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1732, "(1)"
- line 147, "pan.___", state 1740, "(1)"
- line 151, "pan.___", state 1752, "(1)"
- line 158, "pan.___", state 1767, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1776, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1789, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1799, "(1)"
- line 147, "pan.___", state 1807, "(1)"
- line 151, "pan.___", state 1819, "(1)"
- line 510, "pan.___", state 1845, "-end-"
- (158 of 1845 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 571, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 131 seconds
-pan: rate 30683.017 states/second
-pan: avg transition delay 1.8704e-06 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:3013
-2:2:1132
-3:0:3013
-4:1:0
-5:0:3013
-6:1:1
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-13:0:3013
-14:3:2970
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-1610:2:1440
-1611:0:3013
-1612:2:1451
-1613:0:3013
-1614:2:1459
-1615:2:1460
-1616:2:1464
-1617:2:1468
-1618:2:1469
-1619:2:1473
-1620:2:1481
-1621:2:1482
-1622:2:1487
-1623:2:1494
-1624:2:1495
-1625:2:1502
-1626:2:1507
-1627:0:3013
-1628:3:2996
-1629:0:3013
-1630:3:2997
-1631:0:3013
-1632:3:2998
-1633:0:3013
-1634:3:2999
-1635:0:3013
-1636:3:3005
-1637:0:3013
-1638:3:3010
-1639:0:3013
-1640:2:1522
-1641:0:3013
-1642:2:1523
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-1644:2:1528
-1645:2:1536
-1646:2:1537
-1647:2:1541
-1648:2:1542
-1649:2:1550
-1650:2:1555
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-1653:2:1567
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-1655:2:1579
-1656:2:1587
-1657:2:1588
-1658:2:1592
-1659:2:1597
-1660:2:1598
-1661:0:3013
-1662:2:1610
-1663:0:3013
-1664:2:1613
-1665:2:1614
-1666:2:1626
-1667:2:1627
-1668:2:1631
-1669:2:1632
-1670:2:1640
-1671:2:1645
-1672:2:1649
-1673:2:1650
-1674:2:1657
-1675:2:1658
-1676:2:1669
-1677:2:1677
-1678:2:1678
-1679:2:1682
-1680:2:1687
-1681:2:1688
-1682:0:3013
-1683:2:1700
-1684:0:3013
-1685:2:1701
-1686:0:3013
-1687:2:1702
-1688:0:3013
-1689:2:1703
-1690:0:3013
-1691:2:1704
-1692:2:1708
-1693:2:1709
-1694:2:1717
-1695:2:1718
-1696:2:1722
-1697:2:1723
-1698:2:1731
-1699:2:1736
-1700:2:1740
-1701:2:1741
-1702:2:1748
-1703:2:1749
-1704:2:1760
-1705:2:1761
-1706:2:1762
-1707:2:1773
-1708:2:1778
-1709:2:1779
-1710:0:3013
-1711:2:1989
-1712:0:3013
-1713:2:2085
-1714:0:3013
-1715:2:2086
-1716:0:3013
-1717:2:2090
-1718:0:3013
-1719:2:2096
-1720:2:2100
-1721:2:2101
-1722:2:2109
-1723:2:2110
-1724:2:2114
-1725:2:2115
-1726:2:2123
-1727:2:2128
-1728:2:2132
-1729:2:2133
-1730:2:2140
-1731:2:2141
-1732:2:2152
-1733:2:2153
-1734:2:2154
-1735:2:2165
-1736:2:2170
-1737:2:2171
-1738:0:3013
-1739:2:2183
-1740:0:3013
-1741:2:2184
-1742:2:2188
-1743:2:2189
-1744:2:2197
-1745:2:2198
-1746:2:2202
-1747:2:2203
-1748:2:2211
-1749:2:2216
-1750:2:2220
-1751:2:2221
-1752:2:2228
-1753:2:2229
-1754:2:2240
-1755:2:2241
-1756:2:2242
-1757:2:2253
-1758:2:2258
-1759:2:2259
-1760:0:3013
-1761:2:2271
-1762:0:3013
-1763:2:2274
-1764:2:2275
-1765:2:2287
-1766:2:2288
-1767:2:2292
-1768:2:2293
-1769:2:2301
-1770:2:2306
-1771:2:2310
-1772:2:2311
-1773:2:2318
-1774:2:2319
-1775:2:2330
-1776:2:2331
-1777:2:2332
-1778:2:2343
-1779:2:2348
-1780:2:2349
-1781:0:3013
-1782:2:2361
-1783:0:3013
-1784:2:2362
-1785:0:3013
-1786:2:2363
-1787:0:3013
-1788:2:2364
-1789:0:3013
-1790:2:2365
-1791:2:2369
-1792:2:2370
-1793:2:2378
-1794:2:2379
-1795:2:2383
-1796:2:2384
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-1800:2:2402
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-1806:2:2434
-1807:2:2439
-1808:2:2440
-1809:0:3013
-1810:2:2650
-1811:0:3013
-1812:2:2746
-1813:0:3013
-1814:2:2747
-1815:0:3013
-1816:2:2751
-1817:0:3013
-1818:2:2757
-1819:0:3013
-1820:2:2761
-1821:2:2762
-1822:2:2766
-1823:2:2770
-1824:2:2771
-1825:2:2775
-1826:2:2783
-1827:2:2784
-1828:2:2789
-1829:2:2796
-1830:2:2797
-1831:2:2804
-1832:2:2809
-1833:0:3013
-1834:2:2820
-1835:0:3013
-1836:2:2824
-1837:2:2825
-1838:2:2829
-1839:2:2833
-1840:2:2834
-1841:2:2838
-1842:2:2846
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-1844:2:2852
-1845:2:2859
-1846:2:2860
-1847:2:2867
-1848:2:2872
-1849:0:3013
-1850:2:2883
-1851:0:3013
-1852:2:2891
-1853:2:2892
-1854:2:2896
-1855:2:2900
-1856:2:2901
-1857:2:2905
-1858:2:2913
-1859:2:2914
-1860:2:2919
-1861:2:2926
-1862:2:2927
-1863:2:2934
-1864:2:2939
-1865:0:3013
-1866:2:2954
-1867:0:3013
-1868:2:2955
-1869:0:3013
-1870:2:2958
-1871:0:3013
-1872:2:2963
-1873:0:3013
-1874:1:568
-1875:1:572
-1876:1:573
-1877:1:581
-1878:1:582
-1879:1:586
-1880:1:587
-1881:1:595
-1882:1:600
-1883:1:604
-1884:1:605
-1885:1:612
-1886:1:613
-1887:1:624
-1888:1:625
-1889:1:626
-1890:1:637
-1891:1:642
-1892:1:643
-1893:0:3013
-1894:2:2964
-1895:0:3013
-1896:1:655
-1897:0:3011
-1898:2:2963
-1899:0:3017
-1900:1:655
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_nested.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 566)
-Depth= 4234 States= 1e+06 Transitions= 1.7e+07 Memory= 527.287 t= 31.2 R= 3e+04
-Depth= 4234 States= 2e+06 Transitions= 3.44e+07 Memory= 588.322 t= 63.7 R= 3e+04
-Depth= 4234 States= 3e+06 Transitions= 5.2e+07 Memory= 649.358 t= 96.8 R= 3e+04
-pan: resizing hashtable to -w22.. done
-Depth= 4234 States= 4e+06 Transitions= 6.97e+07 Memory= 741.416 t= 130 R= 3e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4234, errors: 0
- 4027146 states, stored
- 66145121 states, matched
- 70172267 transitions (= stored+matched)
-2.6437688e+08 atomic steps
-hash conflicts: 47318190 (resolved)
-
-Stats on memory usage (in Megabytes):
- 322.609 equivalent memory usage for states (stored*(State-vector + overhead))
- 253.418 actual memory usage for states (compression: 78.55%)
- state-vector as stored = 38 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 743.076 total actual memory usage
-
-unreached in proctype urcu_reader
- line 288, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 61, "(1)"
- line 307, "pan.___", state 91, "(1)"
- line 288, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 149, "(1)"
- line 307, "pan.___", state 179, "(1)"
- line 288, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 238, "(1)"
- line 307, "pan.___", state 268, "(1)"
- line 158, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 291, "(1)"
- line 162, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 300, "(1)"
- line 162, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 301, "else"
- line 160, "pan.___", state 306, "((j<1))"
- line 160, "pan.___", state 306, "((j>=1))"
- line 166, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 321, "(1)"
- line 147, "pan.___", state 329, "(1)"
- line 147, "pan.___", state 330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 330, "else"
- line 145, "pan.___", state 335, "((j<1))"
- line 145, "pan.___", state 335, "((j>=1))"
- line 151, "pan.___", state 341, "(1)"
- line 151, "pan.___", state 342, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 342, "else"
- line 153, "pan.___", state 345, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 345, "else"
- line 185, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 347, "else"
- line 158, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 354, "(1)"
- line 162, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 363, "(1)"
- line 162, "pan.___", state 364, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 364, "else"
- line 160, "pan.___", state 369, "((j<1))"
- line 160, "pan.___", state 369, "((j>=1))"
- line 166, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 384, "(1)"
- line 147, "pan.___", state 392, "(1)"
- line 147, "pan.___", state 393, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 393, "else"
- line 145, "pan.___", state 398, "((j<1))"
- line 145, "pan.___", state 398, "((j>=1))"
- line 151, "pan.___", state 404, "(1)"
- line 151, "pan.___", state 405, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 405, "else"
- line 153, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 408, "else"
- line 185, "pan.___", state 410, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 410, "else"
- line 199, "pan.___", state 414, "((i<1))"
- line 199, "pan.___", state 414, "((i>=1))"
- line 158, "pan.___", state 419, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 421, "(1)"
- line 162, "pan.___", state 428, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 430, "(1)"
- line 162, "pan.___", state 431, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 431, "else"
- line 160, "pan.___", state 436, "((j<1))"
- line 160, "pan.___", state 436, "((j>=1))"
- line 166, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 451, "(1)"
- line 147, "pan.___", state 459, "(1)"
- line 147, "pan.___", state 460, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 460, "else"
- line 145, "pan.___", state 465, "((j<1))"
- line 145, "pan.___", state 465, "((j>=1))"
- line 151, "pan.___", state 471, "(1)"
- line 151, "pan.___", state 472, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 472, "else"
- line 153, "pan.___", state 475, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 475, "else"
- line 185, "pan.___", state 477, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 477, "else"
- line 288, "pan.___", state 492, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 537, "(1)"
- line 307, "pan.___", state 567, "(1)"
- line 288, "pan.___", state 580, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 612, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 625, "(1)"
- line 307, "pan.___", state 655, "(1)"
- line 288, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 713, "(1)"
- line 307, "pan.___", state 743, "(1)"
- line 158, "pan.___", state 758, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 760, "(1)"
- line 162, "pan.___", state 767, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 769, "(1)"
- line 162, "pan.___", state 770, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 770, "else"
- line 160, "pan.___", state 775, "((j<1))"
- line 160, "pan.___", state 775, "((j>=1))"
- line 166, "pan.___", state 780, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 790, "(1)"
- line 147, "pan.___", state 798, "(1)"
- line 147, "pan.___", state 799, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 799, "else"
- line 145, "pan.___", state 804, "((j<1))"
- line 145, "pan.___", state 804, "((j>=1))"
- line 151, "pan.___", state 810, "(1)"
- line 151, "pan.___", state 811, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 811, "else"
- line 153, "pan.___", state 814, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 814, "else"
- line 185, "pan.___", state 816, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 816, "else"
- line 158, "pan.___", state 821, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 823, "(1)"
- line 162, "pan.___", state 830, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 162, "pan.___", state 832, "(1)"
- line 162, "pan.___", state 833, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 162, "pan.___", state 833, "else"
- line 160, "pan.___", state 838, "((j<1))"
- line 160, "pan.___", state 838, "((j>=1))"
- line 166, "pan.___", state 843, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 853, "(1)"
- line 147, "pan.___", state 861, "(1)"
- line 147, "pan.___", state 862, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 147, "pan.___", state 862, "else"
- line 145, "pan.___", state 867, "((j<1))"
- line 145, "pan.___", state 867, "((j>=1))"
- line 151, "pan.___", state 873, "(1)"
- line 151, "pan.___", state 874, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 151, "pan.___", state 874, "else"
- line 153, "pan.___", state 877, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 153, "pan.___", state 877, "else"
- line 185, "pan.___", state 879, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 185, "pan.___", state 879, "else"
- line 199, "pan.___", state 883, "((i<1))"
- line 199, "pan.___", state 883, "((i>=1))"
- line 158, "pan.___", state 888, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 158, "pan.___", state 890, "(1)"
- line 162, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 899, "(1)"
- line 162, "pan.___", state 900, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 162, "pan.___", state 900, "else"
- line 160, "pan.___", state 905, "((j<1))"
- line 160, "pan.___", state 905, "((j>=1))"
- line 166, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 920, "(1)"
- line 147, "pan.___", state 928, "(1)"
- line 147, "pan.___", state 929, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 147, "pan.___", state 929, "else"
- line 145, "pan.___", state 934, "((j<1))"
- line 145, "pan.___", state 934, "((j>=1))"
- line 151, "pan.___", state 940, "(1)"
- line 151, "pan.___", state 941, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 151, "pan.___", state 941, "else"
- line 153, "pan.___", state 944, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 153, "pan.___", state 944, "else"
- line 185, "pan.___", state 946, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 185, "pan.___", state 946, "else"
- line 288, "pan.___", state 956, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 988, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1001, "(1)"
- line 307, "pan.___", state 1031, "(1)"
- line 288, "pan.___", state 1052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1084, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1097, "(1)"
- line 307, "pan.___", state 1127, "(1)"
- line 433, "pan.___", state 1140, "-end-"
- (125 of 1140 states)
-unreached in proctype urcu_writer
- line 288, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 59, "(1)"
- line 302, "pan.___", state 72, "(1)"
- line 307, "pan.___", state 89, "(1)"
- line 288, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 151, "(1)"
- line 302, "pan.___", state 164, "(1)"
- line 467, "pan.___", state 195, "(1)"
- line 158, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 237, "(1)"
- line 147, "pan.___", state 245, "(1)"
- line 151, "pan.___", state 257, "(1)"
- line 158, "pan.___", state 268, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 290, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 300, "(1)"
- line 147, "pan.___", state 308, "(1)"
- line 151, "pan.___", state 320, "(1)"
- line 158, "pan.___", state 335, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 344, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 357, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 367, "(1)"
- line 147, "pan.___", state 375, "(1)"
- line 151, "pan.___", state 387, "(1)"
- line 288, "pan.___", state 403, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 448, "(1)"
- line 302, "pan.___", state 461, "(1)"
- line 307, "pan.___", state 478, "(1)"
- line 288, "pan.___", state 495, "(1)"
- line 292, "pan.___", state 507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 525, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 551, "(1)"
- line 307, "pan.___", state 568, "(1)"
- line 292, "pan.___", state 598, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 642, "(1)"
- line 307, "pan.___", state 659, "(1)"
- line 162, "pan.___", state 681, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 694, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 704, "(1)"
- line 147, "pan.___", state 712, "(1)"
- line 151, "pan.___", state 724, "(1)"
- line 158, "pan.___", state 735, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 757, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 767, "(1)"
- line 147, "pan.___", state 775, "(1)"
- line 151, "pan.___", state 787, "(1)"
- line 158, "pan.___", state 802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 811, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 824, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 834, "(1)"
- line 147, "pan.___", state 842, "(1)"
- line 151, "pan.___", state 854, "(1)"
- line 288, "pan.___", state 878, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 880, "(1)"
- line 288, "pan.___", state 881, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 881, "else"
- line 288, "pan.___", state 884, "(1)"
- line 292, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 894, "(1)"
- line 292, "pan.___", state 895, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 895, "else"
- line 292, "pan.___", state 898, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 292, "pan.___", state 899, "(1)"
- line 290, "pan.___", state 904, "((i<1))"
- line 290, "pan.___", state 904, "((i>=1))"
- line 297, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 923, "(1)"
- line 298, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 924, "else"
- line 298, "pan.___", state 927, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 298, "pan.___", state 928, "(1)"
- line 302, "pan.___", state 936, "(1)"
- line 302, "pan.___", state 937, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 937, "else"
- line 302, "pan.___", state 940, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 302, "pan.___", state 941, "(1)"
- line 300, "pan.___", state 946, "((i<1))"
- line 300, "pan.___", state 946, "((i>=1))"
- line 307, "pan.___", state 953, "(1)"
- line 307, "pan.___", state 954, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 954, "else"
- line 307, "pan.___", state 957, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 307, "pan.___", state 958, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 309, "pan.___", state 961, "(1)"
- line 292, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1008, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1034, "(1)"
- line 307, "pan.___", state 1051, "(1)"
- line 292, "pan.___", state 1078, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1096, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1122, "(1)"
- line 307, "pan.___", state 1139, "(1)"
- line 288, "pan.___", state 1156, "(1)"
- line 292, "pan.___", state 1168, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1186, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1212, "(1)"
- line 307, "pan.___", state 1229, "(1)"
- line 292, "pan.___", state 1259, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 297, "pan.___", state 1277, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 302, "pan.___", state 1303, "(1)"
- line 307, "pan.___", state 1320, "(1)"
- line 162, "pan.___", state 1342, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1355, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1365, "(1)"
- line 147, "pan.___", state 1373, "(1)"
- line 151, "pan.___", state 1385, "(1)"
- line 158, "pan.___", state 1396, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1418, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1428, "(1)"
- line 147, "pan.___", state 1436, "(1)"
- line 151, "pan.___", state 1448, "(1)"
- line 158, "pan.___", state 1463, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1472, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1485, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1495, "(1)"
- line 147, "pan.___", state 1503, "(1)"
- line 151, "pan.___", state 1515, "(1)"
- line 288, "pan.___", state 1539, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 288, "pan.___", state 1541, "(1)"
- line 288, "pan.___", state 1542, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 288, "pan.___", state 1542, "else"
- line 288, "pan.___", state 1545, "(1)"
- line 292, "pan.___", state 1553, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 292, "pan.___", state 1555, "(1)"
- line 292, "pan.___", state 1556, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 292, "pan.___", state 1556, "else"
- line 292, "pan.___", state 1559, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 292, "pan.___", state 1560, "(1)"
- line 290, "pan.___", state 1565, "((i<1))"
- line 290, "pan.___", state 1565, "((i>=1))"
- line 297, "pan.___", state 1571, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1584, "(1)"
- line 298, "pan.___", state 1585, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 298, "pan.___", state 1585, "else"
- line 298, "pan.___", state 1588, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 298, "pan.___", state 1589, "(1)"
- line 302, "pan.___", state 1597, "(1)"
- line 302, "pan.___", state 1598, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 302, "pan.___", state 1598, "else"
- line 302, "pan.___", state 1601, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 302, "pan.___", state 1602, "(1)"
- line 300, "pan.___", state 1607, "((i<1))"
- line 300, "pan.___", state 1607, "((i>=1))"
- line 307, "pan.___", state 1614, "(1)"
- line 307, "pan.___", state 1615, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 307, "pan.___", state 1615, "else"
- line 307, "pan.___", state 1618, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 307, "pan.___", state 1619, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 309, "pan.___", state 1622, "(1)"
- line 162, "pan.___", state 1646, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1659, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1669, "(1)"
- line 147, "pan.___", state 1677, "(1)"
- line 151, "pan.___", state 1689, "(1)"
- line 158, "pan.___", state 1700, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 166, "pan.___", state 1722, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 143, "pan.___", state 1732, "(1)"
- line 147, "pan.___", state 1740, "(1)"
- line 151, "pan.___", state 1752, "(1)"
- line 158, "pan.___", state 1767, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 162, "pan.___", state 1776, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 166, "pan.___", state 1789, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 143, "pan.___", state 1799, "(1)"
- line 147, "pan.___", state 1807, "(1)"
- line 151, "pan.___", state 1819, "(1)"
- line 510, "pan.___", state 1845, "-end-"
- (158 of 1845 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 571, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 131 seconds
-pan: rate 30755.659 states/second
-pan: avg transition delay 1.866e-06 usec
-cp .input.spin urcu_free_nested.spin.input
-cp .input.spin.trail urcu_free_nested.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:0:2679
-5:3:1129
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-spin: line 291 "pan.___", Error: syntax error saw 'operator: ='
-spin: line 291 "pan.___", Error: syntax error saw 'operator: ='
-spin: 2 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:3537
-2:3:3489
-3:3:3492
-4:3:3492
-5:3:3495
-6:3:3503
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-16:0:3537
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-44:0:3537
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-179:2:1955
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-181:0:3537
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-183:0:3537
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-188:2:1971
-189:0:3537
-190:2:1972
-191:2:1976
-192:2:1977
-193:2:1985
-194:2:1986
-195:2:1990
-196:2:1991
-197:2:1999
-198:2:2004
-199:2:2008
-200:2:2009
-201:2:2016
-202:2:2017
-203:2:2028
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-319:2:3194
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-321:2:3199
-322:2:3207
-323:2:3208
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-325:2:3213
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-1685:2:2492
-1686:2:2493
-1687:2:2504
-1688:2:2505
-1689:2:2506
-1690:2:2517
-1691:2:2522
-1692:2:2525
-1693:2:2526
-1694:0:3537
-1695:2:2535
-1696:0:3537
-1697:2:2536
-1698:2:2540
-1699:2:2541
-1700:2:2549
-1701:2:2550
-1702:2:2554
-1703:2:2555
-1704:2:2563
-1705:2:2576
-1706:2:2577
-1707:2:2580
-1708:2:2581
-1709:2:2592
-1710:2:2593
-1711:2:2594
-1712:2:2605
-1713:2:2610
-1714:2:2613
-1715:2:2614
-1716:0:3537
-1717:2:2623
-1718:0:3537
-1719:2:2626
-1720:2:2627
-1721:2:2639
-1722:2:2640
-1723:2:2644
-1724:2:2645
-1725:2:2653
-1726:2:2666
-1727:2:2667
-1728:2:2670
-1729:2:2671
-1730:2:2682
-1731:2:2683
-1732:2:2684
-1733:2:2695
-1734:2:2700
-1735:2:2703
-1736:2:2704
-1737:0:3537
-1738:2:2713
-1739:0:3537
-1740:2:2714
-1741:0:3537
-1742:2:2715
-1743:0:3537
-1744:2:2716
-1745:0:3537
-1746:2:2717
-1747:2:2721
-1748:2:2722
-1749:2:2730
-1750:2:2731
-1751:2:2735
-1752:2:2736
-1753:2:2744
-1754:2:2757
-1755:2:2758
-1756:2:2761
-1757:2:2762
-1758:2:2773
-1759:2:2774
-1760:2:2775
-1761:2:2786
-1762:2:2791
-1763:2:2794
-1764:2:2795
-1765:0:3537
-1766:2:3086
-1767:0:3537
-1768:2:3182
-1769:0:3537
-1770:2:3183
-1771:0:3537
-1772:2:3187
-1773:0:3537
-1774:2:3193
-1775:0:3537
-1776:2:3194
-1777:2:3198
-1778:2:3199
-1779:2:3207
-1780:2:3208
-1781:2:3212
-1782:2:3213
-1783:2:3221
-1784:2:3234
-1785:2:3235
-1786:2:3238
-1787:2:3239
-1788:2:3250
-1789:2:3251
-1790:2:3252
-1791:2:3263
-1792:2:3268
-1793:2:3271
-1794:2:3272
-1795:0:3537
-1796:2:3284
-1797:0:3537
-1798:2:3285
-1799:2:3289
-1800:2:3290
-1801:2:3298
-1802:2:3299
-1803:2:3303
-1804:2:3304
-1805:2:3312
-1806:2:3325
-1807:2:3326
-1808:2:3329
-1809:2:3330
-1810:2:3341
-1811:2:3342
-1812:2:3343
-1813:2:3354
-1814:2:3359
-1815:2:3362
-1816:2:3363
-1817:0:3537
-1818:2:3375
-1819:0:3537
-1820:2:3380
-1821:2:3384
-1822:2:3385
-1823:2:3393
-1824:2:3394
-1825:2:3398
-1826:2:3399
-1827:2:3407
-1828:2:3420
-1829:2:3421
-1830:2:3424
-1831:2:3425
-1832:2:3436
-1833:2:3437
-1834:2:3438
-1835:2:3449
-1836:2:3454
-1837:2:3457
-1838:2:3458
-1839:0:3537
-1840:2:3474
-1841:0:3537
-1842:2:3475
-1843:0:3537
-1844:2:3478
-1845:0:3537
-1846:2:3483
-1847:0:3537
-1848:1:2
-1849:0:3537
-1850:2:3484
-1851:0:3537
-1852:1:8
-1853:0:3537
-1854:2:3483
-1855:0:3537
-1856:1:9
-1857:0:3537
-1858:2:3484
-1859:0:3537
-1860:1:10
-1861:0:3537
-1862:2:3483
-1863:0:3537
-1864:1:11
-1865:0:3537
-1866:2:3484
-1867:0:3537
-1868:1:12
-1869:1:16
-1870:1:17
-1871:1:25
-1872:1:26
-1873:1:30
-1874:1:31
-1875:1:39
-1876:1:44
-1877:1:48
-1878:1:49
-1879:1:56
-1880:1:57
-1881:1:68
-1882:1:69
-1883:1:70
-1884:1:81
-1885:1:86
-1886:1:87
-1887:0:3537
-1888:2:3483
-1889:0:3537
-1890:1:99
-1891:0:3537
-1892:2:3484
-1893:0:3537
-1894:1:100
-1895:1:104
-1896:1:105
-1897:1:113
-1898:1:114
-1899:1:118
-1900:1:119
-1901:1:127
-1902:1:132
-1903:1:136
-1904:1:137
-1905:1:144
-1906:1:145
-1907:1:156
-1908:1:157
-1909:1:158
-1910:1:169
-1911:1:174
-1912:1:175
-1913:0:3537
-1914:2:3483
-1915:0:3537
-1916:1:187
-1917:0:3537
-1918:2:3484
-1919:0:3537
-1920:1:188
-1921:0:3537
-1922:2:3483
-1923:0:3537
-1924:1:189
-1925:1:193
-1926:1:194
-1927:1:202
-1928:1:203
-1929:1:207
-1930:1:208
-1931:1:216
-1932:1:221
-1933:1:225
-1934:1:226
-1935:1:233
-1936:1:234
-1937:1:245
-1938:1:246
-1939:1:247
-1940:1:258
-1941:1:263
-1942:1:264
-1943:0:3537
-1944:2:3484
-1945:0:3537
-1946:1:276
-1947:0:3537
-1948:2:3483
-1949:0:3537
-1950:1:561
-1951:0:3537
-1952:2:3484
-1953:0:3537
-1954:1:562
-1955:0:3537
-1956:2:3483
-1957:0:3537
-1958:1:11
-1959:0:3537
-1960:2:3484
-1961:0:3537
-1962:1:12
-1963:1:16
-1964:1:17
-1965:1:25
-1966:1:26
-1967:1:27
-1968:1:39
-1969:1:44
-1970:1:48
-1971:1:49
-1972:1:56
-1973:1:57
-1974:1:68
-1975:1:69
-1976:1:70
-1977:1:81
-1978:1:86
-1979:1:87
-1980:0:3537
-1981:2:3483
-1982:0:3537
-1983:1:99
-1984:0:3537
-1985:2:3484
-1986:0:3537
-1987:1:100
-1988:1:104
-1989:1:105
-1990:1:113
-1991:1:114
-1992:1:118
-1993:1:119
-1994:1:127
-1995:1:132
-1996:1:136
-1997:1:137
-1998:1:144
-1999:1:145
-2000:1:156
-2001:1:157
-2002:1:158
-2003:1:169
-2004:1:174
-2005:1:175
-2006:0:3537
-2007:2:3483
-2008:0:3537
-2009:1:279
-2010:0:3537
-2011:2:3484
-2012:0:3537
-2013:1:280
-2014:0:3537
-2015:2:3483
-2016:0:3537
-2017:1:561
-2018:0:3537
-2019:2:3484
-2020:0:3537
-2021:1:562
-2022:0:3537
-2023:2:3483
-2024:0:3537
-2025:1:567
-2026:0:3537
-2027:2:3484
-2028:0:3537
-2029:1:572
-2030:1:576
-2031:1:577
-2032:1:585
-2033:1:586
-2034:1:587
-2035:1:599
-2036:1:604
-2037:1:608
-2038:1:609
-2039:1:616
-2040:1:617
-2041:1:628
-2042:1:629
-2043:1:630
-2044:1:641
-2045:1:646
-2046:1:647
-2047:0:3537
-2048:2:3483
-2049:0:3537
-2050:1:659
-2051:0:3537
-2052:2:3484
-2053:0:3537
-2054:1:660
-2055:1:664
-2056:1:665
-2057:1:673
-2058:1:674
-2059:1:678
-2060:1:679
-2061:1:687
-2062:1:692
-2063:1:696
-2064:1:697
-2065:1:704
-2066:1:705
-2067:1:716
-2068:1:717
-2069:1:718
-2070:1:729
-2071:1:734
-2072:1:735
-2073:0:3537
-2074:2:3483
-2075:0:3537
-2076:1:747
-2077:0:3535
-2078:2:3484
-2079:0:3541
-2080:1:1280
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 567)
-Depth= 5645 States= 1e+06 Transitions= 1.47e+07 Memory= 527.287 t= 27.1 R= 4e+04
-pan: claim violated! (at depth 1736)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 5645, errors: 1
- 1039881 states, stored
- 14441478 states, matched
- 15481359 transitions (= stored+matched)
- 57000435 atomic steps
-hash conflicts: 2892596 (resolved)
-
-Stats on memory usage (in Megabytes):
- 83.303 equivalent memory usage for states (stored*(State-vector + overhead))
- 64.050 actual memory usage for states (compression: 76.89%)
- state-vector as stored = 37 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 529.729 total actual memory usage
-
-unreached in proctype urcu_reader
- line 289, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 61, "(1)"
- line 308, "pan.___", state 91, "(1)"
- line 289, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 149, "(1)"
- line 308, "pan.___", state 179, "(1)"
- line 289, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 238, "(1)"
- line 308, "pan.___", state 268, "(1)"
- line 159, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 291, "(1)"
- line 163, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 300, "(1)"
- line 163, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 301, "else"
- line 161, "pan.___", state 306, "((j<1))"
- line 161, "pan.___", state 306, "((j>=1))"
- line 167, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 313, "(1)"
- line 167, "pan.___", state 314, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 314, "else"
- line 177, "pan.___", state 319, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 319, "else"
- line 159, "pan.___", state 324, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 326, "(1)"
- line 163, "pan.___", state 333, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 335, "(1)"
- line 163, "pan.___", state 336, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 336, "else"
- line 161, "pan.___", state 341, "((j<1))"
- line 161, "pan.___", state 341, "((j>=1))"
- line 167, "pan.___", state 346, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 348, "(1)"
- line 167, "pan.___", state 349, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 167, "pan.___", state 349, "else"
- line 177, "pan.___", state 354, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 177, "pan.___", state 354, "else"
- line 200, "pan.___", state 358, "((i<1))"
- line 200, "pan.___", state 358, "((i>=1))"
- line 159, "pan.___", state 363, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 365, "(1)"
- line 163, "pan.___", state 372, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 374, "(1)"
- line 163, "pan.___", state 375, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 375, "else"
- line 161, "pan.___", state 380, "((j<1))"
- line 161, "pan.___", state 380, "((j>=1))"
- line 167, "pan.___", state 385, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 387, "(1)"
- line 167, "pan.___", state 388, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 388, "else"
- line 177, "pan.___", state 393, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 393, "else"
- line 289, "pan.___", state 408, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 440, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 453, "(1)"
- line 308, "pan.___", state 483, "(1)"
- line 289, "pan.___", state 496, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 541, "(1)"
- line 308, "pan.___", state 571, "(1)"
- line 289, "pan.___", state 584, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 629, "(1)"
- line 308, "pan.___", state 659, "(1)"
- line 159, "pan.___", state 674, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 676, "(1)"
- line 163, "pan.___", state 683, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 685, "(1)"
- line 163, "pan.___", state 686, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 686, "else"
- line 161, "pan.___", state 691, "((j<1))"
- line 161, "pan.___", state 691, "((j>=1))"
- line 167, "pan.___", state 696, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 698, "(1)"
- line 167, "pan.___", state 699, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 699, "else"
- line 177, "pan.___", state 704, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 704, "else"
- line 159, "pan.___", state 709, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 711, "(1)"
- line 163, "pan.___", state 718, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 720, "(1)"
- line 163, "pan.___", state 721, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 721, "else"
- line 161, "pan.___", state 726, "((j<1))"
- line 161, "pan.___", state 726, "((j>=1))"
- line 167, "pan.___", state 731, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 733, "(1)"
- line 167, "pan.___", state 734, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 167, "pan.___", state 734, "else"
- line 177, "pan.___", state 739, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 177, "pan.___", state 739, "else"
- line 200, "pan.___", state 743, "((i<1))"
- line 200, "pan.___", state 743, "((i>=1))"
- line 159, "pan.___", state 748, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 750, "(1)"
- line 163, "pan.___", state 757, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 759, "(1)"
- line 163, "pan.___", state 760, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 760, "else"
- line 161, "pan.___", state 765, "((j<1))"
- line 161, "pan.___", state 765, "((j>=1))"
- line 167, "pan.___", state 770, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "((cache_dirty_generation_ptr.bitfield&(1<<_pid)))"
- line 167, "pan.___", state 773, "else"
- line 177, "pan.___", state 778, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 177, "pan.___", state 778, "else"
- line 289, "pan.___", state 788, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 820, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 833, "(1)"
- line 308, "pan.___", state 863, "(1)"
- line 289, "pan.___", state 884, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 916, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 929, "(1)"
- line 308, "pan.___", state 959, "(1)"
- line 434, "pan.___", state 972, "-end-"
- (95 of 972 states)
-unreached in proctype urcu_writer
- line 289, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 20, "(1)"
- line 293, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 34, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 291, "pan.___", state 40, "((i<1))"
- line 291, "pan.___", state 40, "((i>=1))"
- line 298, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 59, "(1)"
- line 299, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 60, "else"
- line 299, "pan.___", state 63, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 303, "pan.___", state 72, "(1)"
- line 303, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 73, "else"
- line 303, "pan.___", state 76, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 301, "pan.___", state 82, "((i<1))"
- line 301, "pan.___", state 82, "((i>=1))"
- line 308, "pan.___", state 89, "(1)"
- line 308, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 90, "else"
- line 308, "pan.___", state 93, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 456, "pan.___", state 101, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 454, "pan.___", state 102, "old_gen = cached_generation_ptr.val[_pid]"
- line 289, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 112, "(1)"
- line 293, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 126, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 299, "pan.___", state 151, "(1)"
- line 303, "pan.___", state 164, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 468, "pan.___", state 195, "(1)"
- line 159, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 240, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 262, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 279, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 288, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 301, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 319, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 333, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 351, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 364, "(1)"
- line 303, "pan.___", state 377, "(1)"
- line 308, "pan.___", state 394, "(1)"
- line 289, "pan.___", state 411, "(1)"
- line 293, "pan.___", state 423, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 467, "(1)"
- line 308, "pan.___", state 484, "(1)"
- line 293, "pan.___", state 514, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 532, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 558, "(1)"
- line 308, "pan.___", state 575, "(1)"
- line 163, "pan.___", state 597, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 610, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 623, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 645, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 662, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 671, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 684, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 710, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 712, "(1)"
- line 289, "pan.___", state 713, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 713, "else"
- line 289, "pan.___", state 716, "(1)"
- line 293, "pan.___", state 724, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 726, "(1)"
- line 293, "pan.___", state 727, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 727, "else"
- line 293, "pan.___", state 730, "(1)"
- line 293, "pan.___", state 731, "(1)"
- line 293, "pan.___", state 731, "(1)"
- line 291, "pan.___", state 736, "((i<1))"
- line 291, "pan.___", state 736, "((i>=1))"
- line 298, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 755, "(1)"
- line 299, "pan.___", state 756, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 756, "else"
- line 299, "pan.___", state 759, "(1)"
- line 299, "pan.___", state 760, "(1)"
- line 299, "pan.___", state 760, "(1)"
- line 303, "pan.___", state 768, "(1)"
- line 303, "pan.___", state 769, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 769, "else"
- line 303, "pan.___", state 772, "(1)"
- line 303, "pan.___", state 773, "(1)"
- line 303, "pan.___", state 773, "(1)"
- line 301, "pan.___", state 778, "((i<1))"
- line 301, "pan.___", state 778, "((i>=1))"
- line 308, "pan.___", state 785, "(1)"
- line 308, "pan.___", state 786, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 786, "else"
- line 308, "pan.___", state 789, "(1)"
- line 308, "pan.___", state 790, "(1)"
- line 308, "pan.___", state 790, "(1)"
- line 310, "pan.___", state 793, "(1)"
- line 310, "pan.___", state 793, "(1)"
- line 293, "pan.___", state 822, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 840, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 866, "(1)"
- line 308, "pan.___", state 883, "(1)"
- line 293, "pan.___", state 910, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 928, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 954, "(1)"
- line 308, "pan.___", state 971, "(1)"
- line 289, "pan.___", state 988, "(1)"
- line 293, "pan.___", state 1000, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1018, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1044, "(1)"
- line 308, "pan.___", state 1061, "(1)"
- line 293, "pan.___", state 1091, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1109, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1135, "(1)"
- line 308, "pan.___", state 1152, "(1)"
- line 163, "pan.___", state 1174, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1187, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1200, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 1222, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1239, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 1248, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1261, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 1287, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 1289, "(1)"
- line 289, "pan.___", state 1290, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 1290, "else"
- line 289, "pan.___", state 1293, "(1)"
- line 293, "pan.___", state 1301, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 1303, "(1)"
- line 293, "pan.___", state 1304, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 1304, "else"
- line 293, "pan.___", state 1307, "(1)"
- line 293, "pan.___", state 1308, "(1)"
- line 293, "pan.___", state 1308, "(1)"
- line 291, "pan.___", state 1313, "((i<1))"
- line 291, "pan.___", state 1313, "((i>=1))"
- line 298, "pan.___", state 1319, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1332, "(1)"
- line 299, "pan.___", state 1333, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 1333, "else"
- line 299, "pan.___", state 1336, "(1)"
- line 299, "pan.___", state 1337, "(1)"
- line 299, "pan.___", state 1337, "(1)"
- line 303, "pan.___", state 1345, "(1)"
- line 303, "pan.___", state 1346, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 1346, "else"
- line 303, "pan.___", state 1349, "(1)"
- line 303, "pan.___", state 1350, "(1)"
- line 303, "pan.___", state 1350, "(1)"
- line 301, "pan.___", state 1355, "((i<1))"
- line 301, "pan.___", state 1355, "((i>=1))"
- line 308, "pan.___", state 1362, "(1)"
- line 308, "pan.___", state 1363, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 1363, "else"
- line 308, "pan.___", state 1366, "(1)"
- line 308, "pan.___", state 1367, "(1)"
- line 308, "pan.___", state 1367, "(1)"
- line 310, "pan.___", state 1370, "(1)"
- line 310, "pan.___", state 1370, "(1)"
- line 163, "pan.___", state 1394, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1407, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1420, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 1442, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1459, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 1468, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1481, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 511, "pan.___", state 1509, "-end-"
- (143 of 1509 states)
-unreached in proctype :init:
- line 518, "pan.___", state 9, "((j<2))"
- line 518, "pan.___", state 9, "((j>=2))"
- line 519, "pan.___", state 20, "((j<2))"
- line 519, "pan.___", state 20, "((j>=2))"
- line 524, "pan.___", state 33, "((j<2))"
- line 524, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 572, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 28.5 seconds
-pan: rate 36487.053 states/second
-pan: avg transition delay 1.8409e-06 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define NO_RMB
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-19:2:974
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-33:2:1014
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-238:2:1991
-239:2:1998
-240:2:1999
-241:2:2010
-242:2:2011
-243:2:2012
-244:2:2023
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-1467:2:2028
-1468:2:2029
-1469:0:2529
-1470:2:2041
-1471:0:2529
-1472:2:2042
-1473:0:2529
-1474:2:2043
-1475:0:2529
-1476:2:2044
-1477:0:2529
-1478:2:2045
-1479:2:2049
-1480:2:2050
-1481:2:2058
-1482:2:2059
-1483:2:2063
-1484:2:2064
-1485:2:2072
-1486:2:2077
-1487:2:2081
-1488:2:2082
-1489:2:2089
-1490:2:2090
-1491:2:2101
-1492:2:2102
-1493:2:2103
-1494:2:2114
-1495:2:2119
-1496:2:2120
-1497:0:2529
-1498:2:2246
-1499:0:2529
-1500:2:2342
-1501:0:2529
-1502:2:2343
-1503:0:2529
-1504:2:2347
-1505:0:2529
-1506:2:2353
-1507:0:2529
-1508:2:2357
-1509:2:2358
-1510:2:2362
-1511:2:2366
-1512:2:2367
-1513:2:2371
-1514:2:2379
-1515:2:2380
-1516:0:2529
-1517:2:2388
-1518:0:2529
-1519:2:2392
-1520:2:2393
-1521:2:2397
-1522:2:2401
-1523:2:2402
-1524:2:2406
-1525:2:2414
-1526:2:2415
-1527:0:2529
-1528:2:2423
-1529:0:2529
-1530:2:2431
-1531:2:2432
-1532:2:2436
-1533:2:2440
-1534:2:2441
-1535:2:2445
-1536:2:2453
-1537:2:2454
-1538:0:2529
-1539:2:2466
-1540:0:2529
-1541:2:2467
-1542:0:2529
-1543:2:2470
-1544:0:2529
-1545:2:2475
-1546:0:2529
-1547:1:99
-1548:0:2529
-1549:2:2476
-1550:0:2529
-1551:1:100
-1552:1:104
-1553:1:105
-1554:1:113
-1555:1:114
-1556:1:118
-1557:1:119
-1558:1:127
-1559:1:132
-1560:1:136
-1561:1:137
-1562:1:144
-1563:1:145
-1564:1:156
-1565:1:157
-1566:1:158
-1567:1:169
-1568:1:181
-1569:1:182
-1570:0:2529
-1571:2:2475
-1572:0:2529
-1573:1:187
-1574:0:2529
-1575:2:2476
-1576:0:2529
-1577:1:188
-1578:0:2529
-1579:2:2475
-1580:0:2529
-1581:1:189
-1582:1:193
-1583:1:194
-1584:1:202
-1585:1:203
-1586:1:207
-1587:1:208
-1588:1:216
-1589:1:221
-1590:1:225
-1591:1:226
-1592:1:233
-1593:1:234
-1594:1:245
-1595:1:246
-1596:1:247
-1597:1:258
-1598:1:270
-1599:1:271
-1600:0:2529
-1601:2:2476
-1602:0:2529
-1603:1:276
-1604:0:2529
-1605:2:2475
-1606:0:2529
-1607:1:393
-1608:0:2529
-1609:2:2476
-1610:0:2529
-1611:1:394
-1612:0:2529
-1613:2:2475
-1614:0:2529
-1615:1:11
-1616:0:2529
-1617:2:2476
-1618:0:2529
-1619:1:12
-1620:1:16
-1621:1:17
-1622:1:25
-1623:1:26
-1624:1:27
-1625:1:39
-1626:1:44
-1627:1:48
-1628:1:49
-1629:1:56
-1630:1:57
-1631:1:68
-1632:1:69
-1633:1:70
-1634:1:81
-1635:1:93
-1636:1:94
-1637:0:2529
-1638:2:2475
-1639:0:2529
-1640:1:99
-1641:0:2529
-1642:2:2476
-1643:0:2529
-1644:1:100
-1645:1:104
-1646:1:105
-1647:1:113
-1648:1:114
-1649:1:118
-1650:1:119
-1651:1:127
-1652:1:132
-1653:1:136
-1654:1:137
-1655:1:144
-1656:1:145
-1657:1:156
-1658:1:157
-1659:1:158
-1660:1:169
-1661:1:181
-1662:1:182
-1663:0:2529
-1664:2:2475
-1665:0:2529
-1666:1:279
-1667:0:2529
-1668:2:2476
-1669:0:2529
-1670:1:280
-1671:0:2529
-1672:2:2475
-1673:0:2529
-1674:1:393
-1675:0:2529
-1676:2:2476
-1677:0:2529
-1678:1:394
-1679:0:2529
-1680:2:2475
-1681:0:2529
-1682:1:399
-1683:0:2529
-1684:2:2476
-1685:0:2529
-1686:1:404
-1687:1:408
-1688:1:409
-1689:1:417
-1690:1:418
-1691:1:419
-1692:1:431
-1693:1:436
-1694:1:440
-1695:1:441
-1696:1:448
-1697:1:449
-1698:1:460
-1699:1:461
-1700:1:462
-1701:1:473
-1702:1:485
-1703:1:486
-1704:0:2529
-1705:2:2475
-1706:0:2529
-1707:1:491
-1708:0:2529
-1709:2:2476
-1710:0:2529
-1711:1:492
-1712:1:496
-1713:1:497
-1714:1:505
-1715:1:506
-1716:1:510
-1717:1:511
-1718:1:519
-1719:1:524
-1720:1:528
-1721:1:529
-1722:1:536
-1723:1:537
-1724:1:548
-1725:1:549
-1726:1:550
-1727:1:561
-1728:1:566
-1729:1:567
-1730:0:2529
-1731:2:2475
-1732:0:2529
-1733:1:579
-1734:0:2527
-1735:2:2476
-1736:0:2533
-1737:1:662
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 567)
-pan: claim violated! (at depth 1889)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 6646, errors: 1
- 377244 states, stored
- 5291719 states, matched
- 5668963 transitions (= stored+matched)
- 20822372 atomic steps
-hash conflicts: 405371 (resolved)
-
-Stats on memory usage (in Megabytes):
- 30.221 equivalent memory usage for states (stored*(State-vector + overhead))
- 23.526 actual memory usage for states (compression: 77.85%)
- state-vector as stored = 37 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 489.201 total actual memory usage
-
-unreached in proctype urcu_reader
- line 289, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 61, "(1)"
- line 308, "pan.___", state 91, "(1)"
- line 289, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 149, "(1)"
- line 308, "pan.___", state 179, "(1)"
- line 289, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 238, "(1)"
- line 308, "pan.___", state 268, "(1)"
- line 144, "pan.___", state 290, "(1)"
- line 148, "pan.___", state 298, "(1)"
- line 148, "pan.___", state 299, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 299, "else"
- line 146, "pan.___", state 304, "((j<1))"
- line 146, "pan.___", state 304, "((j>=1))"
- line 152, "pan.___", state 310, "(1)"
- line 152, "pan.___", state 311, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 311, "else"
- line 186, "pan.___", state 316, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 316, "else"
- line 144, "pan.___", state 322, "(1)"
- line 148, "pan.___", state 330, "(1)"
- line 148, "pan.___", state 331, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 331, "else"
- line 146, "pan.___", state 336, "((j<1))"
- line 146, "pan.___", state 336, "((j>=1))"
- line 152, "pan.___", state 342, "(1)"
- line 152, "pan.___", state 343, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 343, "else"
- line 186, "pan.___", state 348, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 186, "pan.___", state 348, "else"
- line 200, "pan.___", state 352, "((i<1))"
- line 200, "pan.___", state 352, "((i>=1))"
- line 144, "pan.___", state 358, "(1)"
- line 148, "pan.___", state 366, "(1)"
- line 148, "pan.___", state 367, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 367, "else"
- line 146, "pan.___", state 372, "((j<1))"
- line 146, "pan.___", state 372, "((j>=1))"
- line 152, "pan.___", state 378, "(1)"
- line 152, "pan.___", state 379, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 379, "else"
- line 186, "pan.___", state 384, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 384, "else"
- line 289, "pan.___", state 399, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 415, "(1)"
- line 298, "pan.___", state 431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 444, "(1)"
- line 308, "pan.___", state 474, "(1)"
- line 289, "pan.___", state 487, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 519, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 532, "(1)"
- line 308, "pan.___", state 562, "(1)"
- line 289, "pan.___", state 575, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 607, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 620, "(1)"
- line 308, "pan.___", state 650, "(1)"
- line 144, "pan.___", state 666, "(1)"
- line 148, "pan.___", state 674, "(1)"
- line 148, "pan.___", state 675, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 675, "else"
- line 146, "pan.___", state 680, "((j<1))"
- line 146, "pan.___", state 680, "((j>=1))"
- line 152, "pan.___", state 686, "(1)"
- line 152, "pan.___", state 687, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 687, "else"
- line 186, "pan.___", state 692, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 692, "else"
- line 144, "pan.___", state 698, "(1)"
- line 148, "pan.___", state 706, "(1)"
- line 148, "pan.___", state 707, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 707, "else"
- line 146, "pan.___", state 712, "((j<1))"
- line 146, "pan.___", state 712, "((j>=1))"
- line 152, "pan.___", state 718, "(1)"
- line 152, "pan.___", state 719, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 719, "else"
- line 186, "pan.___", state 724, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 186, "pan.___", state 724, "else"
- line 200, "pan.___", state 728, "((i<1))"
- line 200, "pan.___", state 728, "((i>=1))"
- line 144, "pan.___", state 734, "(1)"
- line 148, "pan.___", state 742, "(1)"
- line 148, "pan.___", state 743, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 743, "else"
- line 146, "pan.___", state 748, "((j<1))"
- line 146, "pan.___", state 748, "((j>=1))"
- line 152, "pan.___", state 754, "(1)"
- line 152, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 755, "else"
- line 186, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 760, "else"
- line 289, "pan.___", state 770, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 802, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 815, "(1)"
- line 308, "pan.___", state 845, "(1)"
- line 289, "pan.___", state 866, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 882, "(1)"
- line 298, "pan.___", state 898, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 911, "(1)"
- line 308, "pan.___", state 941, "(1)"
- line 434, "pan.___", state 954, "-end-"
- (79 of 954 states)
-unreached in proctype urcu_writer
- line 289, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 20, "(1)"
- line 293, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 34, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 293, "pan.___", state 35, "(1)"
- line 291, "pan.___", state 40, "((i<1))"
- line 291, "pan.___", state 40, "((i>=1))"
- line 298, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 59, "(1)"
- line 299, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 60, "else"
- line 299, "pan.___", state 63, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 299, "pan.___", state 64, "(1)"
- line 303, "pan.___", state 72, "(1)"
- line 303, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 73, "else"
- line 303, "pan.___", state 76, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 303, "pan.___", state 77, "(1)"
- line 301, "pan.___", state 82, "((i<1))"
- line 301, "pan.___", state 82, "((i>=1))"
- line 308, "pan.___", state 89, "(1)"
- line 308, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 90, "else"
- line 308, "pan.___", state 93, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 308, "pan.___", state 94, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 310, "pan.___", state 97, "(1)"
- line 456, "pan.___", state 101, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 454, "pan.___", state 102, "old_gen = cached_generation_ptr.val[_pid]"
- line 289, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 112, "(1)"
- line 293, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 126, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 293, "pan.___", state 127, "(1)"
- line 291, "pan.___", state 132, "((i<1))"
- line 291, "pan.___", state 132, "((i>=1))"
- line 299, "pan.___", state 151, "(1)"
- line 299, "pan.___", state 152, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 152, "else"
- line 299, "pan.___", state 155, "(1)"
- line 299, "pan.___", state 156, "(1)"
- line 299, "pan.___", state 156, "(1)"
- line 303, "pan.___", state 164, "(1)"
- line 303, "pan.___", state 165, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 165, "else"
- line 303, "pan.___", state 168, "(1)"
- line 303, "pan.___", state 169, "(1)"
- line 303, "pan.___", state 169, "(1)"
- line 301, "pan.___", state 174, "((i<1))"
- line 301, "pan.___", state 174, "((i>=1))"
- line 308, "pan.___", state 181, "(1)"
- line 308, "pan.___", state 182, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 182, "else"
- line 308, "pan.___", state 185, "(1)"
- line 308, "pan.___", state 186, "(1)"
- line 308, "pan.___", state 186, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 310, "pan.___", state 189, "(1)"
- line 468, "pan.___", state 195, "(1)"
- line 462, "pan.___", state 198, "((write_lock==0))"
- line 462, "pan.___", state 198, "else"
- line 460, "pan.___", state 199, "(1)"
- line 144, "pan.___", state 206, "(1)"
- line 148, "pan.___", state 214, "(1)"
- line 148, "pan.___", state 215, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 215, "else"
- line 146, "pan.___", state 220, "((j<1))"
- line 146, "pan.___", state 220, "((j>=1))"
- line 152, "pan.___", state 226, "(1)"
- line 152, "pan.___", state 227, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 227, "else"
- line 186, "pan.___", state 232, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 186, "pan.___", state 232, "else"
- line 144, "pan.___", state 238, "(1)"
- line 152, "pan.___", state 258, "(1)"
- line 144, "pan.___", state 274, "(1)"
- line 148, "pan.___", state 282, "(1)"
- line 152, "pan.___", state 294, "(1)"
- line 289, "pan.___", state 310, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 324, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 342, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 355, "(1)"
- line 303, "pan.___", state 368, "(1)"
- line 308, "pan.___", state 385, "(1)"
- line 289, "pan.___", state 402, "(1)"
- line 293, "pan.___", state 414, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 432, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 458, "(1)"
- line 308, "pan.___", state 475, "(1)"
- line 293, "pan.___", state 505, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 523, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 549, "(1)"
- line 308, "pan.___", state 566, "(1)"
- line 148, "pan.___", state 588, "(1)"
- line 152, "pan.___", state 600, "(1)"
- line 144, "pan.___", state 612, "(1)"
- line 152, "pan.___", state 632, "(1)"
- line 148, "pan.___", state 656, "(1)"
- line 152, "pan.___", state 668, "(1)"
- line 289, "pan.___", state 692, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 694, "(1)"
- line 289, "pan.___", state 695, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 695, "else"
- line 289, "pan.___", state 698, "(1)"
- line 293, "pan.___", state 706, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 708, "(1)"
- line 293, "pan.___", state 709, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 709, "else"
- line 293, "pan.___", state 712, "(1)"
- line 293, "pan.___", state 713, "(1)"
- line 293, "pan.___", state 713, "(1)"
- line 291, "pan.___", state 718, "((i<1))"
- line 291, "pan.___", state 718, "((i>=1))"
- line 298, "pan.___", state 724, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 737, "(1)"
- line 299, "pan.___", state 738, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 738, "else"
- line 299, "pan.___", state 741, "(1)"
- line 299, "pan.___", state 742, "(1)"
- line 299, "pan.___", state 742, "(1)"
- line 303, "pan.___", state 750, "(1)"
- line 303, "pan.___", state 751, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 751, "else"
- line 303, "pan.___", state 754, "(1)"
- line 303, "pan.___", state 755, "(1)"
- line 303, "pan.___", state 755, "(1)"
- line 301, "pan.___", state 760, "((i<1))"
- line 301, "pan.___", state 760, "((i>=1))"
- line 308, "pan.___", state 767, "(1)"
- line 308, "pan.___", state 768, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 768, "else"
- line 308, "pan.___", state 771, "(1)"
- line 308, "pan.___", state 772, "(1)"
- line 308, "pan.___", state 772, "(1)"
- line 310, "pan.___", state 775, "(1)"
- line 310, "pan.___", state 775, "(1)"
- line 293, "pan.___", state 804, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 822, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 848, "(1)"
- line 308, "pan.___", state 865, "(1)"
- line 293, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 936, "(1)"
- line 308, "pan.___", state 953, "(1)"
- line 289, "pan.___", state 970, "(1)"
- line 293, "pan.___", state 982, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1000, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1026, "(1)"
- line 308, "pan.___", state 1043, "(1)"
- line 293, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 1117, "(1)"
- line 308, "pan.___", state 1134, "(1)"
- line 148, "pan.___", state 1156, "(1)"
- line 152, "pan.___", state 1168, "(1)"
- line 144, "pan.___", state 1180, "(1)"
- line 152, "pan.___", state 1200, "(1)"
- line 148, "pan.___", state 1224, "(1)"
- line 152, "pan.___", state 1236, "(1)"
- line 289, "pan.___", state 1260, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 1262, "(1)"
- line 289, "pan.___", state 1263, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 1263, "else"
- line 289, "pan.___", state 1266, "(1)"
- line 293, "pan.___", state 1274, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 1276, "(1)"
- line 293, "pan.___", state 1277, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 1277, "else"
- line 293, "pan.___", state 1280, "(1)"
- line 293, "pan.___", state 1281, "(1)"
- line 293, "pan.___", state 1281, "(1)"
- line 291, "pan.___", state 1286, "((i<1))"
- line 291, "pan.___", state 1286, "((i>=1))"
- line 298, "pan.___", state 1292, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1305, "(1)"
- line 299, "pan.___", state 1306, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 1306, "else"
- line 299, "pan.___", state 1309, "(1)"
- line 299, "pan.___", state 1310, "(1)"
- line 299, "pan.___", state 1310, "(1)"
- line 303, "pan.___", state 1318, "(1)"
- line 303, "pan.___", state 1319, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 1319, "else"
- line 303, "pan.___", state 1322, "(1)"
- line 303, "pan.___", state 1323, "(1)"
- line 303, "pan.___", state 1323, "(1)"
- line 301, "pan.___", state 1328, "((i<1))"
- line 301, "pan.___", state 1328, "((i>=1))"
- line 308, "pan.___", state 1335, "(1)"
- line 308, "pan.___", state 1336, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 1336, "else"
- line 308, "pan.___", state 1339, "(1)"
- line 308, "pan.___", state 1340, "(1)"
- line 308, "pan.___", state 1340, "(1)"
- line 310, "pan.___", state 1343, "(1)"
- line 310, "pan.___", state 1343, "(1)"
- line 148, "pan.___", state 1367, "(1)"
- line 152, "pan.___", state 1379, "(1)"
- line 144, "pan.___", state 1391, "(1)"
- line 152, "pan.___", state 1411, "(1)"
- line 148, "pan.___", state 1435, "(1)"
- line 152, "pan.___", state 1447, "(1)"
- line 511, "pan.___", state 1473, "-end-"
- (159 of 1473 states)
-unreached in proctype :init:
- line 518, "pan.___", state 9, "((j<2))"
- line 518, "pan.___", state 9, "((j>=2))"
- line 519, "pan.___", state 20, "((j<2))"
- line 519, "pan.___", state 20, "((j>=2))"
- line 524, "pan.___", state 33, "((j<2))"
- line 524, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 572, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 10.4 seconds
-pan: rate 36378.399 states/second
-pan: avg transition delay 1.8293e-06 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define NO_WMB
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-2:3:2427
-3:3:2430
-4:3:2430
-5:3:2433
-6:3:2441
-7:3:2441
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-10:3:2454
-11:3:2454
-12:3:2457
-13:3:2465
-14:3:2469
-15:3:2470
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-17:3:2472
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-19:2:956
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-21:2:962
-22:0:2475
-23:2:963
-24:0:2475
-25:2:964
-26:2:968
-27:2:969
-28:2:977
-29:2:978
-30:2:982
-31:2:983
-32:2:991
-33:2:996
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-35:2:1001
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-1733:2:1740
-1734:2:1744
-1735:2:1745
-1736:2:1753
-1737:2:1754
-1738:2:1758
-1739:2:1759
-1740:2:1767
-1741:2:1772
-1742:2:1776
-1743:2:1777
-1744:2:1784
-1745:2:1785
-1746:2:1796
-1747:2:1797
-1748:2:1798
-1749:2:1809
-1750:2:1814
-1751:2:1815
-1752:0:2475
-1753:2:1827
-1754:0:2475
-1755:2:1828
-1756:2:1832
-1757:2:1833
-1758:2:1841
-1759:2:1842
-1760:2:1846
-1761:2:1847
-1762:2:1855
-1763:2:1860
-1764:2:1864
-1765:2:1865
-1766:2:1872
-1767:2:1873
-1768:2:1884
-1769:2:1885
-1770:2:1886
-1771:2:1897
-1772:2:1902
-1773:2:1903
-1774:0:2475
-1775:2:1915
-1776:0:2475
-1777:2:1918
-1778:2:1919
-1779:2:1931
-1780:2:1932
-1781:2:1936
-1782:2:1937
-1783:2:1945
-1784:2:1950
-1785:2:1954
-1786:2:1955
-1787:2:1962
-1788:2:1963
-1789:2:1974
-1790:2:1975
-1791:2:1976
-1792:2:1987
-1793:2:1992
-1794:2:1993
-1795:0:2475
-1796:2:2005
-1797:0:2475
-1798:2:2006
-1799:0:2475
-1800:2:2007
-1801:0:2475
-1802:2:2008
-1803:0:2475
-1804:2:2009
-1805:2:2013
-1806:2:2014
-1807:2:2022
-1808:2:2023
-1809:2:2027
-1810:2:2028
-1811:2:2036
-1812:2:2041
-1813:2:2045
-1814:2:2046
-1815:2:2053
-1816:2:2054
-1817:2:2065
-1818:2:2066
-1819:2:2067
-1820:2:2078
-1821:2:2083
-1822:2:2084
-1823:0:2475
-1824:2:2201
-1825:0:2475
-1826:2:2297
-1827:0:2475
-1828:2:2298
-1829:0:2475
-1830:2:2302
-1831:0:2475
-1832:2:2308
-1833:0:2475
-1834:2:2309
-1835:2:2316
-1836:2:2317
-1837:2:2324
-1838:2:2329
-1839:0:2475
-1840:2:2340
-1841:0:2475
-1842:2:2341
-1843:2:2348
-1844:2:2351
-1845:2:2352
-1846:2:2356
-1847:2:2361
-1848:0:2475
-1849:2:2372
-1850:0:2475
-1851:2:2377
-1852:2:2384
-1853:2:2385
-1854:2:2392
-1855:2:2397
-1856:0:2475
-1857:2:2412
-1858:0:2475
-1859:2:2413
-1860:0:2475
-1861:2:2416
-1862:0:2475
-1863:2:2421
-1864:0:2475
-1865:1:483
-1866:1:487
-1867:1:488
-1868:1:496
-1869:1:497
-1870:1:498
-1871:1:510
-1872:1:515
-1873:1:519
-1874:1:520
-1875:1:527
-1876:1:528
-1877:1:539
-1878:1:540
-1879:1:541
-1880:1:552
-1881:1:557
-1882:1:558
-1883:0:2475
-1884:2:2422
-1885:0:2475
-1886:1:570
-1887:0:2473
-1888:2:2421
-1889:0:2479
-1890:1:151
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 567)
-pan: claim violated! (at depth 1353)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3705, errors: 1
- 216253 states, stored
- 2924019 states, matched
- 3140272 transitions (= stored+matched)
- 11791015 atomic steps
-hash conflicts: 155585 (resolved)
-
-Stats on memory usage (in Megabytes):
- 17.324 equivalent memory usage for states (stored*(State-vector + overhead))
- 13.576 actual memory usage for states (compression: 78.37%)
- state-vector as stored = 38 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 479.338 total actual memory usage
-
-unreached in proctype urcu_reader
- line 289, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 61, "(1)"
- line 308, "pan.___", state 91, "(1)"
- line 289, "pan.___", state 104, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 136, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 149, "(1)"
- line 308, "pan.___", state 179, "(1)"
- line 289, "pan.___", state 193, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 225, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 238, "(1)"
- line 308, "pan.___", state 268, "(1)"
- line 159, "pan.___", state 289, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 291, "(1)"
- line 163, "pan.___", state 298, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 300, "(1)"
- line 163, "pan.___", state 301, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 301, "else"
- line 161, "pan.___", state 306, "((j<1))"
- line 161, "pan.___", state 306, "((j>=1))"
- line 167, "pan.___", state 311, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 321, "(1)"
- line 148, "pan.___", state 329, "(1)"
- line 148, "pan.___", state 330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 330, "else"
- line 146, "pan.___", state 335, "((j<1))"
- line 146, "pan.___", state 335, "((j>=1))"
- line 152, "pan.___", state 341, "(1)"
- line 152, "pan.___", state 342, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 342, "else"
- line 154, "pan.___", state 345, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 345, "else"
- line 186, "pan.___", state 347, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 347, "else"
- line 159, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 354, "(1)"
- line 163, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 363, "(1)"
- line 163, "pan.___", state 364, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 364, "else"
- line 161, "pan.___", state 369, "((j<1))"
- line 161, "pan.___", state 369, "((j>=1))"
- line 167, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 384, "(1)"
- line 148, "pan.___", state 392, "(1)"
- line 148, "pan.___", state 393, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 393, "else"
- line 146, "pan.___", state 398, "((j<1))"
- line 146, "pan.___", state 398, "((j>=1))"
- line 152, "pan.___", state 404, "(1)"
- line 152, "pan.___", state 405, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 405, "else"
- line 154, "pan.___", state 408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 154, "pan.___", state 408, "else"
- line 186, "pan.___", state 410, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 186, "pan.___", state 410, "else"
- line 200, "pan.___", state 414, "((i<1))"
- line 200, "pan.___", state 414, "((i>=1))"
- line 159, "pan.___", state 419, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 421, "(1)"
- line 163, "pan.___", state 428, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 430, "(1)"
- line 163, "pan.___", state 431, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 431, "else"
- line 161, "pan.___", state 436, "((j<1))"
- line 161, "pan.___", state 436, "((j>=1))"
- line 167, "pan.___", state 441, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 451, "(1)"
- line 148, "pan.___", state 459, "(1)"
- line 148, "pan.___", state 460, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 460, "else"
- line 146, "pan.___", state 465, "((j<1))"
- line 146, "pan.___", state 465, "((j>=1))"
- line 152, "pan.___", state 471, "(1)"
- line 152, "pan.___", state 472, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 472, "else"
- line 154, "pan.___", state 475, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 475, "else"
- line 186, "pan.___", state 477, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 477, "else"
- line 289, "pan.___", state 492, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 537, "(1)"
- line 308, "pan.___", state 567, "(1)"
- line 289, "pan.___", state 580, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 612, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 625, "(1)"
- line 308, "pan.___", state 655, "(1)"
- line 289, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 713, "(1)"
- line 308, "pan.___", state 743, "(1)"
- line 159, "pan.___", state 758, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 767, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 769, "(1)"
- line 163, "pan.___", state 770, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 770, "else"
- line 161, "pan.___", state 775, "((j<1))"
- line 161, "pan.___", state 775, "((j>=1))"
- line 167, "pan.___", state 780, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 790, "(1)"
- line 148, "pan.___", state 798, "(1)"
- line 148, "pan.___", state 799, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 799, "else"
- line 146, "pan.___", state 804, "((j<1))"
- line 146, "pan.___", state 804, "((j>=1))"
- line 152, "pan.___", state 810, "(1)"
- line 152, "pan.___", state 811, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 811, "else"
- line 154, "pan.___", state 814, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 814, "else"
- line 186, "pan.___", state 816, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 816, "else"
- line 159, "pan.___", state 821, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 830, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 163, "pan.___", state 832, "(1)"
- line 163, "pan.___", state 833, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 163, "pan.___", state 833, "else"
- line 161, "pan.___", state 838, "((j<1))"
- line 161, "pan.___", state 838, "((j>=1))"
- line 167, "pan.___", state 843, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 853, "(1)"
- line 148, "pan.___", state 861, "(1)"
- line 148, "pan.___", state 862, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 148, "pan.___", state 862, "else"
- line 146, "pan.___", state 867, "((j<1))"
- line 146, "pan.___", state 867, "((j>=1))"
- line 152, "pan.___", state 873, "(1)"
- line 152, "pan.___", state 874, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 152, "pan.___", state 874, "else"
- line 154, "pan.___", state 877, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 154, "pan.___", state 877, "else"
- line 186, "pan.___", state 879, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 186, "pan.___", state 879, "else"
- line 200, "pan.___", state 883, "((i<1))"
- line 200, "pan.___", state 883, "((i>=1))"
- line 159, "pan.___", state 888, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 897, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 899, "(1)"
- line 163, "pan.___", state 900, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 163, "pan.___", state 900, "else"
- line 161, "pan.___", state 905, "((j<1))"
- line 161, "pan.___", state 905, "((j>=1))"
- line 167, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 920, "(1)"
- line 148, "pan.___", state 928, "(1)"
- line 148, "pan.___", state 929, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 148, "pan.___", state 929, "else"
- line 146, "pan.___", state 934, "((j<1))"
- line 146, "pan.___", state 934, "((j>=1))"
- line 152, "pan.___", state 940, "(1)"
- line 152, "pan.___", state 941, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 152, "pan.___", state 941, "else"
- line 154, "pan.___", state 944, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 154, "pan.___", state 944, "else"
- line 186, "pan.___", state 946, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 186, "pan.___", state 946, "else"
- line 289, "pan.___", state 956, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 988, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1001, "(1)"
- line 308, "pan.___", state 1031, "(1)"
- line 289, "pan.___", state 1052, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 1084, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 1097, "(1)"
- line 308, "pan.___", state 1127, "(1)"
- line 434, "pan.___", state 1140, "-end-"
- (125 of 1140 states)
-unreached in proctype urcu_writer
- line 289, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 59, "(1)"
- line 303, "pan.___", state 72, "(1)"
- line 308, "pan.___", state 89, "(1)"
- line 289, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 151, "(1)"
- line 303, "pan.___", state 164, "(1)"
- line 468, "pan.___", state 195, "(1)"
- line 159, "pan.___", state 205, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 214, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 237, "(1)"
- line 148, "pan.___", state 245, "(1)"
- line 152, "pan.___", state 257, "(1)"
- line 159, "pan.___", state 268, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 290, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 300, "(1)"
- line 148, "pan.___", state 308, "(1)"
- line 152, "pan.___", state 320, "(1)"
- line 159, "pan.___", state 335, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 344, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 357, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 367, "(1)"
- line 148, "pan.___", state 375, "(1)"
- line 152, "pan.___", state 387, "(1)"
- line 289, "pan.___", state 403, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 448, "(1)"
- line 303, "pan.___", state 461, "(1)"
- line 308, "pan.___", state 478, "(1)"
- line 289, "pan.___", state 495, "(1)"
- line 293, "pan.___", state 507, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 525, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 551, "(1)"
- line 308, "pan.___", state 568, "(1)"
- line 293, "pan.___", state 598, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 298, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 303, "pan.___", state 642, "(1)"
- line 308, "pan.___", state 659, "(1)"
- line 163, "pan.___", state 681, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 694, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 704, "(1)"
- line 148, "pan.___", state 712, "(1)"
- line 152, "pan.___", state 724, "(1)"
- line 159, "pan.___", state 735, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 757, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 767, "(1)"
- line 148, "pan.___", state 775, "(1)"
- line 152, "pan.___", state 787, "(1)"
- line 159, "pan.___", state 802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 811, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 824, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 834, "(1)"
- line 148, "pan.___", state 842, "(1)"
- line 152, "pan.___", state 854, "(1)"
- line 289, "pan.___", state 878, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 289, "pan.___", state 880, "(1)"
- line 289, "pan.___", state 881, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 289, "pan.___", state 881, "else"
- line 289, "pan.___", state 884, "(1)"
- line 293, "pan.___", state 892, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 293, "pan.___", state 894, "(1)"
- line 293, "pan.___", state 895, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 293, "pan.___", state 895, "else"
- line 293, "pan.___", state 898, "(1)"
- line 293, "pan.___", state 899, "(1)"
- line 293, "pan.___", state 899, "(1)"
- line 291, "pan.___", state 904, "((i<1))"
- line 291, "pan.___", state 904, "((i>=1))"
- line 298, "pan.___", state 910, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 299, "pan.___", state 923, "(1)"
- line 299, "pan.___", state 924, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 299, "pan.___", state 924, "else"
- line 299, "pan.___", state 927, "(1)"
- line 299, "pan.___", state 928, "(1)"
- line 299, "pan.___", state 928, "(1)"
- line 303, "pan.___", state 936, "(1)"
- line 303, "pan.___", state 937, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 303, "pan.___", state 937, "else"
- line 303, "pan.___", state 940, "(1)"
- line 303, "pan.___", state 941, "(1)"
- line 303, "pan.___", state 941, "(1)"
- line 301, "pan.___", state 946, "((i<1))"
- line 301, "pan.___", state 946, "((i>=1))"
- line 308, "pan.___", state 953, "(1)"
- line 308, "pan.___", state 954, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 308, "pan.___", state 954, "else"
- line 308, "pan.___", state 957, "(1)"
- line 308, "pan.___", state 958, "(1)"
- line 308, "pan.___", state 958, "(1)"
- line 310, "pan.___", state 961, "(1)"
- line 310, "pan.___", state 961, "(1)"
- line 163, "pan.___", state 985, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 998, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 1008, "(1)"
- line 148, "pan.___", state 1016, "(1)"
- line 152, "pan.___", state 1028, "(1)"
- line 159, "pan.___", state 1039, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 167, "pan.___", state 1061, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 144, "pan.___", state 1071, "(1)"
- line 148, "pan.___", state 1079, "(1)"
- line 152, "pan.___", state 1091, "(1)"
- line 159, "pan.___", state 1106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 163, "pan.___", state 1115, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 167, "pan.___", state 1128, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 144, "pan.___", state 1138, "(1)"
- line 148, "pan.___", state 1146, "(1)"
- line 152, "pan.___", state 1158, "(1)"
- line 511, "pan.___", state 1184, "-end-"
- (100 of 1184 states)
-unreached in proctype :init:
- line 518, "pan.___", state 9, "((j<2))"
- line 518, "pan.___", state 9, "((j>=2))"
- line 519, "pan.___", state 20, "((j<2))"
- line 519, "pan.___", state 20, "((j>=2))"
- line 524, "pan.___", state 33, "((j<2))"
- line 524, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 572, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 5.58 seconds
-pan: rate 38755.018 states/second
-pan: avg transition delay 1.7769e-06 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-
-#if (NR_READERS == 1)
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#elif (NR_READERS == 2)
-
-#define read_free_race (read_generation[0] == last_free_gen || read_generation[1] == last_free_gen)
-#define read_free (free_done && (data_access[0] || data_access[1]))
-
-#else
-
-#error "Too many readers"
-
-#endif
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- atomic {
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- :: else ->
- skip;
- fi;
- }
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2372
-2:3:2324
-3:3:2327
-4:3:2327
-5:3:2330
-6:3:2338
-7:3:2338
-8:3:2341
-9:3:2347
-10:3:2351
-11:3:2351
-12:3:2354
-13:3:2362
-14:3:2366
-15:3:2367
-16:0:2372
-17:3:2369
-18:0:2372
-19:2:1142
-20:0:2372
-21:2:1148
-22:0:2372
-23:2:1149
-24:0:2372
-25:2:1150
-26:2:1154
-27:2:1155
-28:2:1163
-29:2:1164
-30:2:1168
-31:2:1169
-32:2:1177
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-938:1:104
-939:1:105
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-942:1:118
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-944:1:127
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-948:1:151
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-966:2:2193
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-968:2:2202
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-974:0:2372
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-986:2:2281
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+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-spin: line 296 replacement value: tmp
-spin: line 296 "pan.___", Error: formal par of wait_for_quiescent_state contains replacement value saw '-2'' near 'readerid'
-spin: 1 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define READER_PROGRESS
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -w -DHASH64 -o pan pan.c
+++ /dev/null
-#define WRITER_PROGRESS
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-spin: line 297 replacement value: tmp
-spin: line 297 "pan.___", Error: formal par of wait_for_quiescent_state contains replacement value saw '-2'' near 'readerid'
-spin: 1 error(s) - aborting
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu/testmerge'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#define read_free_race (read_generation == last_free_gen)
-#define read_free (free_done && data_access)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define get_pid() (_pid)
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
- * both.
- */
-
-#define DECLARE_CACHED_VAR(type, x, v) \
- type mem_##x = v; \
- type cached_##x[NR_PROCS] = v; \
- bit cache_dirty_##x[NR_PROCS] = 0
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
-
-#define READ_CACHED_VAR(x) (cached_##x[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x[get_pid()] = v; \
- cache_dirty_##x[get_pid()] = 1; \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x[id]; \
- cache_dirty_##x[id] = 0; \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- CACHE_READ_FROM_MEM(urcu_active_readers_one, i);
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, i);
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid());
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- CACHE_READ_FROM_MEM(urcu_active_readers_one, get_pid());
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- CACHE_WRITE_TO_MEM(urcu_active_readers_one, get_pid());
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i);
-#endif
-#ifndef NO_RMB
- smp_rmb(i);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr, 1);
-/* Note ! currently only one reader */
-DECLARE_CACHED_VAR(byte, urcu_active_readers_one, 0);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr, 0);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation = 1;
-bit data_access = 0;
-
-bit write_lock = 0;
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers_one,
- get_pid());
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, id, i)
-{
- do
- :: 1 ->
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (tmp & RCU_GP_CTR_NEST_MASK)
- && ((tmp ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i);
-#else
- ooo_mem(i);
-#endif
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, i, j)
-{
- i = 0;
- do
- :: i < NR_READERS ->
- wait_for_reader(tmp, i, j);
- if
- :: (NR_READERS > 1) && (i < NR_READERS - 1)
- -> ooo_mem(j);
- :: else
- -> skip;
- fi;
- i++
- :: i >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers_one,
- tmp + 1);
- fi;
- smp_mb(i);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access = 1;
- ooo_mem(i);
- data_access = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i);
- tmp2 = READ_CACHED_VAR(urcu_active_readers_one);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers_one, tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active [NR_READERS] proctype urcu_reader()
-{
- byte i, nest_i;
- byte tmp, tmp2;
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, nest_i, tmp, tmp2);
- od;
-}
-
-/* Model the RCU update process. */
-
-active [NR_WRITERS] proctype urcu_writer()
-{
- byte i, j;
- byte tmp;
- byte old_gen;
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- //smp_mc(i);
- wait_for_quiescent_state(tmp, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- wait_for_quiescent_state(tmp, i, j);
-#endif
- smp_mb(i);
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- skip;
- od;
-}
+++ /dev/null
--2:2:-2
--4:-4:-4
-1:0:2223
-2:2:908
-3:0:2223
-4:1:0
-5:0:2223
-6:1:1
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-11:0:2223
-12:2:909
-13:0:2223
-14:2:910
-15:2:914
-16:2:915
-17:2:922
-18:2:926
-19:2:927
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-23:2:946
-24:2:947
-25:2:957
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-27:2:968
-28:2:969
-29:0:2221
-30:2:981
-31:2:982
-32:0:2227
-33:2:986
-34:2:990
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-58:2:1080
-59:2:1081
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+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 741)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10669, errors: 0
- 20146 states, stored
- 191615 states, matched
- 211761 transitions (= stored+matched)
- 712676 atomic steps
-hash conflicts: 1523 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.614 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.661 actual memory usage for states (unsuccessful compression: 102.92%)
- state-vector as stored = 58 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.326 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 401, "pan.___", state 330, "(1)"
- line 612, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 397, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 406, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 59, "(1)"
- line 416, "pan.___", state 89, "(1)"
- line 397, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 160, "(1)"
- line 650, "pan.___", state 213, "(1)"
- line 173, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, "pan.___", state 233, "(1)"
- line 158, "pan.___", state 254, "(1)"
- line 162, "pan.___", state 262, "(1)"
- line 166, "pan.___", state 274, "(1)"
- line 173, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 317, "(1)"
- line 162, "pan.___", state 325, "(1)"
- line 166, "pan.___", state 337, "(1)"
- line 173, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 384, "(1)"
- line 162, "pan.___", state 392, "(1)"
- line 166, "pan.___", state 404, "(1)"
- line 397, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 401, "pan.___", state 441, "(1)"
- line 406, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 470, "(1)"
- line 416, "pan.___", state 500, "(1)"
- line 397, "pan.___", state 526, "(1)"
- line 401, "pan.___", state 540, "(1)"
- line 406, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 599, "(1)"
- line 401, "pan.___", state 640, "(1)"
- line 406, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 699, "(1)"
- line 173, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 722, "(1)"
- line 177, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 731, "(1)"
- line 177, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 732, "else"
- line 175, "pan.___", state 737, "((j<1))"
- line 175, "pan.___", state 737, "((j>=1))"
- line 181, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 752, "(1)"
- line 162, "pan.___", state 760, "(1)"
- line 162, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 761, "else"
- line 160, "pan.___", state 766, "((j<1))"
- line 160, "pan.___", state 766, "((j>=1))"
- line 166, "pan.___", state 772, "(1)"
- line 166, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 773, "else"
- line 168, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 776, "else"
- line 173, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, "pan.___", state 785, "(1)"
- line 177, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, "pan.___", state 794, "(1)"
- line 177, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, "pan.___", state 795, "else"
- line 175, "pan.___", state 800, "((j<1))"
- line 175, "pan.___", state 800, "((j>=1))"
- line 181, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 815, "(1)"
- line 162, "pan.___", state 823, "(1)"
- line 162, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, "pan.___", state 824, "else"
- line 160, "pan.___", state 829, "((j<1))"
- line 160, "pan.___", state 829, "((j>=1))"
- line 166, "pan.___", state 835, "(1)"
- line 166, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, "pan.___", state 836, "else"
- line 168, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, "pan.___", state 839, "else"
- line 200, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, "pan.___", state 841, "else"
- line 212, "pan.___", state 845, "((i<1))"
- line 212, "pan.___", state 845, "((i>=1))"
- line 173, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 852, "(1)"
- line 177, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 861, "(1)"
- line 177, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 862, "else"
- line 175, "pan.___", state 867, "((j<1))"
- line 175, "pan.___", state 867, "((j>=1))"
- line 181, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 882, "(1)"
- line 162, "pan.___", state 890, "(1)"
- line 162, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 891, "else"
- line 160, "pan.___", state 896, "((j<1))"
- line 160, "pan.___", state 896, "((j>=1))"
- line 166, "pan.___", state 902, "(1)"
- line 166, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 903, "else"
- line 168, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 906, "else"
- line 200, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, "pan.___", state 908, "else"
- line 219, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, "pan.___", state 909, "else"
- line 354, "pan.___", state 915, "((sighand_exec==1))"
- line 354, "pan.___", state 915, "else"
- line 360, "pan.___", state 918, "sighand_exec = 1"
- line 397, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, "pan.___", state 933, "(1)"
- line 397, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, "pan.___", state 934, "else"
- line 397, "pan.___", state 937, "(1)"
- line 401, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, "pan.___", state 947, "(1)"
- line 401, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, "pan.___", state 948, "else"
- line 401, "pan.___", state 951, "(1)"
- line 401, "pan.___", state 952, "(1)"
- line 401, "pan.___", state 952, "(1)"
- line 399, "pan.___", state 957, "((i<1))"
- line 399, "pan.___", state 957, "((i>=1))"
- line 406, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 976, "(1)"
- line 407, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, "pan.___", state 977, "else"
- line 407, "pan.___", state 980, "(1)"
- line 407, "pan.___", state 981, "(1)"
- line 407, "pan.___", state 981, "(1)"
- line 411, "pan.___", state 989, "(1)"
- line 411, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, "pan.___", state 990, "else"
- line 411, "pan.___", state 993, "(1)"
- line 411, "pan.___", state 994, "(1)"
- line 411, "pan.___", state 994, "(1)"
- line 409, "pan.___", state 999, "((i<1))"
- line 409, "pan.___", state 999, "((i>=1))"
- line 416, "pan.___", state 1006, "(1)"
- line 416, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, "pan.___", state 1007, "else"
- line 416, "pan.___", state 1010, "(1)"
- line 416, "pan.___", state 1011, "(1)"
- line 416, "pan.___", state 1011, "(1)"
- line 418, "pan.___", state 1014, "(1)"
- line 418, "pan.___", state 1014, "(1)"
- line 360, "pan.___", state 1023, "sighand_exec = 1"
- line 401, "pan.___", state 1054, "(1)"
- line 406, "pan.___", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1113, "(1)"
- line 401, "pan.___", state 1151, "(1)"
- line 406, "pan.___", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1210, "(1)"
- line 397, "pan.___", state 1236, "(1)"
- line 401, "pan.___", state 1250, "(1)"
- line 406, "pan.___", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1309, "(1)"
- line 401, "pan.___", state 1350, "(1)"
- line 406, "pan.___", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 416, "pan.___", state 1409, "(1)"
- line 173, "pan.___", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 1432, "(1)"
- line 177, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 1441, "(1)"
- line 177, "pan.___", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 1442, "else"
- line 175, "pan.___", state 1447, "((j<1))"
- line 175, "pan.___", state 1447, "((j>=1))"
- line 181, "pan.___", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1462, "(1)"
- line 162, "pan.___", state 1470, "(1)"
- line 162, "pan.___", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 1471, "else"
- line 160, "pan.___", state 1476, "((j<1))"
- line 160, "pan.___", state 1476, "((j>=1))"
- line 166, "pan.___", state 1482, "(1)"
- line 166, "pan.___", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 1483, "else"
- line 168, "pan.___", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 1486, "else"
- line 173, "pan.___", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 173, "pan.___", state 1495, "(1)"
- line 177, "pan.___", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 177, "pan.___", state 1504, "(1)"
- line 177, "pan.___", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 177, "pan.___", state 1505, "else"
- line 175, "pan.___", state 1510, "((j<1))"
- line 175, "pan.___", state 1510, "((j>=1))"
- line 181, "pan.___", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 1525, "(1)"
- line 162, "pan.___", state 1533, "(1)"
- line 162, "pan.___", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 162, "pan.___", state 1534, "else"
- line 160, "pan.___", state 1539, "((j<1))"
- line 160, "pan.___", state 1539, "((j>=1))"
- line 166, "pan.___", state 1545, "(1)"
- line 166, "pan.___", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 166, "pan.___", state 1546, "else"
- line 168, "pan.___", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 168, "pan.___", state 1549, "else"
- line 200, "pan.___", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 200, "pan.___", state 1551, "else"
- line 212, "pan.___", state 1555, "((i<1))"
- line 212, "pan.___", state 1555, "((i>=1))"
- line 173, "pan.___", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 173, "pan.___", state 1562, "(1)"
- line 177, "pan.___", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 177, "pan.___", state 1571, "(1)"
- line 177, "pan.___", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 177, "pan.___", state 1572, "else"
- line 175, "pan.___", state 1577, "((j<1))"
- line 175, "pan.___", state 1577, "((j>=1))"
- line 181, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1592, "(1)"
- line 162, "pan.___", state 1600, "(1)"
- line 162, "pan.___", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 162, "pan.___", state 1601, "else"
- line 160, "pan.___", state 1606, "((j<1))"
- line 160, "pan.___", state 1606, "((j>=1))"
- line 166, "pan.___", state 1612, "(1)"
- line 166, "pan.___", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 166, "pan.___", state 1613, "else"
- line 168, "pan.___", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 168, "pan.___", state 1616, "else"
- line 200, "pan.___", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 200, "pan.___", state 1618, "else"
- line 219, "pan.___", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 219, "pan.___", state 1619, "else"
- line 354, "pan.___", state 1625, "((sighand_exec==1))"
- line 354, "pan.___", state 1625, "else"
- line 360, "pan.___", state 1628, "sighand_exec = 1"
- line 397, "pan.___", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 397, "pan.___", state 1643, "(1)"
- line 397, "pan.___", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 397, "pan.___", state 1644, "else"
- line 397, "pan.___", state 1647, "(1)"
- line 401, "pan.___", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 401, "pan.___", state 1657, "(1)"
- line 401, "pan.___", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 401, "pan.___", state 1658, "else"
- line 401, "pan.___", state 1661, "(1)"
- line 401, "pan.___", state 1662, "(1)"
- line 401, "pan.___", state 1662, "(1)"
- line 399, "pan.___", state 1667, "((i<1))"
- line 399, "pan.___", state 1667, "((i>=1))"
- line 406, "pan.___", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 1686, "(1)"
- line 407, "pan.___", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 407, "pan.___", state 1687, "else"
- line 407, "pan.___", state 1690, "(1)"
- line 407, "pan.___", state 1691, "(1)"
- line 407, "pan.___", state 1691, "(1)"
- line 411, "pan.___", state 1699, "(1)"
- line 411, "pan.___", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 411, "pan.___", state 1700, "else"
- line 411, "pan.___", state 1703, "(1)"
- line 411, "pan.___", state 1704, "(1)"
- line 411, "pan.___", state 1704, "(1)"
- line 409, "pan.___", state 1709, "((i<1))"
- line 409, "pan.___", state 1709, "((i>=1))"
- line 416, "pan.___", state 1716, "(1)"
- line 416, "pan.___", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 416, "pan.___", state 1717, "else"
- line 416, "pan.___", state 1720, "(1)"
- line 416, "pan.___", state 1721, "(1)"
- line 416, "pan.___", state 1721, "(1)"
- line 418, "pan.___", state 1724, "(1)"
- line 418, "pan.___", state 1724, "(1)"
- line 360, "pan.___", state 1733, "sighand_exec = 1"
- line 177, "pan.___", state 1758, "(1)"
- line 181, "pan.___", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1779, "(1)"
- line 162, "pan.___", state 1787, "(1)"
- line 166, "pan.___", state 1799, "(1)"
- line 173, "pan.___", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 177, "pan.___", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 181, "pan.___", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 158, "pan.___", state 1842, "(1)"
- line 162, "pan.___", state 1850, "(1)"
- line 166, "pan.___", state 1862, "(1)"
- line 173, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 177, "pan.___", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 181, "pan.___", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 158, "pan.___", state 1909, "(1)"
- line 162, "pan.___", state 1917, "(1)"
- line 166, "pan.___", state 1929, "(1)"
- line 700, "pan.___", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 746, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.15 seconds
-pan: rate 134306.67 states/second
-pan: avg transition delay 7.0835e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
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-14893:2:1199
-14894:2:1200
-14895:2:1194
-14896:2:1195
-14897:2:1196
-14898:2:1208
-14899:2:1213
-14900:2:1217
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-14913:0:4365
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+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 72 byte, depth reached 10856, errors: 0
- 161519 states, stored
- 1724866 states, matched
- 1886385 transitions (= stored+matched)
- 6692565 atomic steps
-hash conflicts: 84009 (resolved)
-
-Stats on memory usage (in Megabytes):
- 15.404 equivalent memory usage for states (stored*(State-vector + overhead))
- 10.421 actual memory usage for states (compression: 67.65%)
- state-vector as stored = 40 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 476.115 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 403, "pan.___", state 330, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 652, "pan.___", state 213, "(1)"
- line 403, "pan.___", state 239, "(1)"
- line 403, "pan.___", state 525, "(1)"
- line 399, "pan.___", state 610, "(1)"
- line 403, "pan.___", state 624, "(1)"
- line 403, "pan.___", state 724, "(1)"
- line 399, "pan.___", state 805, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 807, "(1)"
- line 399, "pan.___", state 808, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 808, "else"
- line 399, "pan.___", state 811, "(1)"
- line 403, "pan.___", state 819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 821, "(1)"
- line 403, "pan.___", state 822, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 822, "else"
- line 403, "pan.___", state 825, "(1)"
- line 403, "pan.___", state 826, "(1)"
- line 403, "pan.___", state 826, "(1)"
- line 401, "pan.___", state 831, "((j<1))"
- line 401, "pan.___", state 831, "((j>=1))"
- line 408, "pan.___", state 837, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 850, "(1)"
- line 409, "pan.___", state 851, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 851, "else"
- line 409, "pan.___", state 854, "(1)"
- line 409, "pan.___", state 855, "(1)"
- line 409, "pan.___", state 855, "(1)"
- line 413, "pan.___", state 863, "(1)"
- line 413, "pan.___", state 864, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 864, "else"
- line 413, "pan.___", state 867, "(1)"
- line 413, "pan.___", state 868, "(1)"
- line 413, "pan.___", state 868, "(1)"
- line 411, "pan.___", state 873, "((j<1))"
- line 411, "pan.___", state 873, "((j>=1))"
- line 418, "pan.___", state 880, "(1)"
- line 418, "pan.___", state 881, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 881, "else"
- line 418, "pan.___", state 884, "(1)"
- line 418, "pan.___", state 885, "(1)"
- line 418, "pan.___", state 885, "(1)"
- line 399, "pan.___", state 896, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 898, "(1)"
- line 399, "pan.___", state 899, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 899, "else"
- line 399, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 910, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 912, "(1)"
- line 403, "pan.___", state 913, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 913, "else"
- line 403, "pan.___", state 916, "(1)"
- line 403, "pan.___", state 917, "(1)"
- line 403, "pan.___", state 917, "(1)"
- line 401, "pan.___", state 922, "((j<1))"
- line 401, "pan.___", state 922, "((j>=1))"
- line 408, "pan.___", state 928, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 941, "(1)"
- line 409, "pan.___", state 942, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 942, "else"
- line 409, "pan.___", state 945, "(1)"
- line 409, "pan.___", state 946, "(1)"
- line 409, "pan.___", state 946, "(1)"
- line 413, "pan.___", state 954, "(1)"
- line 413, "pan.___", state 955, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 955, "else"
- line 413, "pan.___", state 958, "(1)"
- line 413, "pan.___", state 959, "(1)"
- line 413, "pan.___", state 959, "(1)"
- line 411, "pan.___", state 964, "((j<1))"
- line 411, "pan.___", state 964, "((j>=1))"
- line 418, "pan.___", state 971, "(1)"
- line 418, "pan.___", state 972, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 972, "else"
- line 418, "pan.___", state 975, "(1)"
- line 418, "pan.___", state 976, "(1)"
- line 418, "pan.___", state 976, "(1)"
- line 194, "pan.___", state 981, "(1)"
- line 194, "pan.___", state 981, "(1)"
- line 214, "pan.___", state 985, "((i<1))"
- line 214, "pan.___", state 985, "((i>=1))"
- line 399, "pan.___", state 991, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 993, "(1)"
- line 399, "pan.___", state 994, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 994, "else"
- line 399, "pan.___", state 997, "(1)"
- line 403, "pan.___", state 1005, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1007, "(1)"
- line 403, "pan.___", state 1008, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1008, "else"
- line 403, "pan.___", state 1011, "(1)"
- line 403, "pan.___", state 1012, "(1)"
- line 403, "pan.___", state 1012, "(1)"
- line 401, "pan.___", state 1017, "((j<1))"
- line 401, "pan.___", state 1017, "((j>=1))"
- line 408, "pan.___", state 1023, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1036, "(1)"
- line 409, "pan.___", state 1037, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1037, "else"
- line 409, "pan.___", state 1040, "(1)"
- line 409, "pan.___", state 1041, "(1)"
- line 409, "pan.___", state 1041, "(1)"
- line 413, "pan.___", state 1049, "(1)"
- line 413, "pan.___", state 1050, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1050, "else"
- line 413, "pan.___", state 1053, "(1)"
- line 413, "pan.___", state 1054, "(1)"
- line 413, "pan.___", state 1054, "(1)"
- line 411, "pan.___", state 1059, "((j<1))"
- line 411, "pan.___", state 1059, "((j>=1))"
- line 418, "pan.___", state 1066, "(1)"
- line 418, "pan.___", state 1067, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1067, "else"
- line 418, "pan.___", state 1070, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 194, "pan.___", state 1076, "(1)"
- line 194, "pan.___", state 1076, "(1)"
- line 221, "pan.___", state 1077, "(1)"
- line 221, "pan.___", state 1077, "(1)"
- line 356, "pan.___", state 1083, "((sighand_exec==1))"
- line 356, "pan.___", state 1083, "else"
- line 362, "pan.___", state 1086, "sighand_exec = 1"
- line 399, "pan.___", state 1099, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1101, "(1)"
- line 399, "pan.___", state 1102, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1102, "else"
- line 399, "pan.___", state 1105, "(1)"
- line 403, "pan.___", state 1113, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1115, "(1)"
- line 403, "pan.___", state 1116, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1116, "else"
- line 403, "pan.___", state 1119, "(1)"
- line 403, "pan.___", state 1120, "(1)"
- line 403, "pan.___", state 1120, "(1)"
- line 401, "pan.___", state 1125, "((i<1))"
- line 401, "pan.___", state 1125, "((i>=1))"
- line 408, "pan.___", state 1131, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1144, "(1)"
- line 409, "pan.___", state 1145, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1145, "else"
- line 409, "pan.___", state 1148, "(1)"
- line 409, "pan.___", state 1149, "(1)"
- line 409, "pan.___", state 1149, "(1)"
- line 413, "pan.___", state 1157, "(1)"
- line 413, "pan.___", state 1158, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1158, "else"
- line 413, "pan.___", state 1161, "(1)"
- line 413, "pan.___", state 1162, "(1)"
- line 413, "pan.___", state 1162, "(1)"
- line 411, "pan.___", state 1167, "((i<1))"
- line 411, "pan.___", state 1167, "((i>=1))"
- line 418, "pan.___", state 1174, "(1)"
- line 418, "pan.___", state 1175, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1175, "else"
- line 418, "pan.___", state 1178, "(1)"
- line 418, "pan.___", state 1179, "(1)"
- line 418, "pan.___", state 1179, "(1)"
- line 420, "pan.___", state 1182, "(1)"
- line 420, "pan.___", state 1182, "(1)"
- line 362, "pan.___", state 1191, "sighand_exec = 1"
- line 403, "pan.___", state 1222, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 399, "pan.___", state 1404, "(1)"
- line 403, "pan.___", state 1418, "(1)"
- line 403, "pan.___", state 1518, "(1)"
- line 399, "pan.___", state 1599, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1601, "(1)"
- line 399, "pan.___", state 1602, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1602, "else"
- line 399, "pan.___", state 1605, "(1)"
- line 403, "pan.___", state 1613, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1615, "(1)"
- line 403, "pan.___", state 1616, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1616, "else"
- line 403, "pan.___", state 1619, "(1)"
- line 403, "pan.___", state 1620, "(1)"
- line 403, "pan.___", state 1620, "(1)"
- line 401, "pan.___", state 1625, "((j<1))"
- line 401, "pan.___", state 1625, "((j>=1))"
- line 408, "pan.___", state 1631, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1644, "(1)"
- line 409, "pan.___", state 1645, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1645, "else"
- line 409, "pan.___", state 1648, "(1)"
- line 409, "pan.___", state 1649, "(1)"
- line 409, "pan.___", state 1649, "(1)"
- line 413, "pan.___", state 1657, "(1)"
- line 413, "pan.___", state 1658, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1658, "else"
- line 413, "pan.___", state 1661, "(1)"
- line 413, "pan.___", state 1662, "(1)"
- line 413, "pan.___", state 1662, "(1)"
- line 411, "pan.___", state 1667, "((j<1))"
- line 411, "pan.___", state 1667, "((j>=1))"
- line 418, "pan.___", state 1674, "(1)"
- line 418, "pan.___", state 1675, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1675, "else"
- line 418, "pan.___", state 1678, "(1)"
- line 418, "pan.___", state 1679, "(1)"
- line 418, "pan.___", state 1679, "(1)"
- line 399, "pan.___", state 1690, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1692, "(1)"
- line 399, "pan.___", state 1693, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1693, "else"
- line 399, "pan.___", state 1696, "(1)"
- line 403, "pan.___", state 1704, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1706, "(1)"
- line 403, "pan.___", state 1707, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1707, "else"
- line 403, "pan.___", state 1710, "(1)"
- line 403, "pan.___", state 1711, "(1)"
- line 403, "pan.___", state 1711, "(1)"
- line 401, "pan.___", state 1716, "((j<1))"
- line 401, "pan.___", state 1716, "((j>=1))"
- line 408, "pan.___", state 1722, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1735, "(1)"
- line 409, "pan.___", state 1736, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1736, "else"
- line 409, "pan.___", state 1739, "(1)"
- line 409, "pan.___", state 1740, "(1)"
- line 409, "pan.___", state 1740, "(1)"
- line 413, "pan.___", state 1748, "(1)"
- line 413, "pan.___", state 1749, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1749, "else"
- line 413, "pan.___", state 1752, "(1)"
- line 413, "pan.___", state 1753, "(1)"
- line 413, "pan.___", state 1753, "(1)"
- line 411, "pan.___", state 1758, "((j<1))"
- line 411, "pan.___", state 1758, "((j>=1))"
- line 418, "pan.___", state 1765, "(1)"
- line 418, "pan.___", state 1766, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1766, "else"
- line 418, "pan.___", state 1769, "(1)"
- line 418, "pan.___", state 1770, "(1)"
- line 418, "pan.___", state 1770, "(1)"
- line 194, "pan.___", state 1775, "(1)"
- line 194, "pan.___", state 1775, "(1)"
- line 214, "pan.___", state 1779, "((i<1))"
- line 214, "pan.___", state 1779, "((i>=1))"
- line 399, "pan.___", state 1785, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1787, "(1)"
- line 399, "pan.___", state 1788, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1788, "else"
- line 399, "pan.___", state 1791, "(1)"
- line 403, "pan.___", state 1799, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1801, "(1)"
- line 403, "pan.___", state 1802, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1802, "else"
- line 403, "pan.___", state 1805, "(1)"
- line 403, "pan.___", state 1806, "(1)"
- line 403, "pan.___", state 1806, "(1)"
- line 401, "pan.___", state 1811, "((j<1))"
- line 401, "pan.___", state 1811, "((j>=1))"
- line 408, "pan.___", state 1817, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1830, "(1)"
- line 409, "pan.___", state 1831, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1831, "else"
- line 409, "pan.___", state 1834, "(1)"
- line 409, "pan.___", state 1835, "(1)"
- line 409, "pan.___", state 1835, "(1)"
- line 413, "pan.___", state 1843, "(1)"
- line 413, "pan.___", state 1844, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1844, "else"
- line 413, "pan.___", state 1847, "(1)"
- line 413, "pan.___", state 1848, "(1)"
- line 413, "pan.___", state 1848, "(1)"
- line 411, "pan.___", state 1853, "((j<1))"
- line 411, "pan.___", state 1853, "((j>=1))"
- line 418, "pan.___", state 1860, "(1)"
- line 418, "pan.___", state 1861, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1861, "else"
- line 418, "pan.___", state 1864, "(1)"
- line 418, "pan.___", state 1865, "(1)"
- line 418, "pan.___", state 1865, "(1)"
- line 194, "pan.___", state 1870, "(1)"
- line 194, "pan.___", state 1870, "(1)"
- line 221, "pan.___", state 1871, "(1)"
- line 221, "pan.___", state 1871, "(1)"
- line 356, "pan.___", state 1877, "((sighand_exec==1))"
- line 356, "pan.___", state 1877, "else"
- line 362, "pan.___", state 1880, "sighand_exec = 1"
- line 399, "pan.___", state 1893, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1895, "(1)"
- line 399, "pan.___", state 1896, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1896, "else"
- line 399, "pan.___", state 1899, "(1)"
- line 403, "pan.___", state 1907, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1909, "(1)"
- line 403, "pan.___", state 1910, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1910, "else"
- line 403, "pan.___", state 1913, "(1)"
- line 403, "pan.___", state 1914, "(1)"
- line 403, "pan.___", state 1914, "(1)"
- line 401, "pan.___", state 1919, "((i<1))"
- line 401, "pan.___", state 1919, "((i>=1))"
- line 408, "pan.___", state 1925, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1938, "(1)"
- line 409, "pan.___", state 1939, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1939, "else"
- line 409, "pan.___", state 1942, "(1)"
- line 409, "pan.___", state 1943, "(1)"
- line 409, "pan.___", state 1943, "(1)"
- line 413, "pan.___", state 1951, "(1)"
- line 413, "pan.___", state 1952, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1952, "else"
- line 413, "pan.___", state 1955, "(1)"
- line 413, "pan.___", state 1956, "(1)"
- line 413, "pan.___", state 1956, "(1)"
- line 411, "pan.___", state 1961, "((i<1))"
- line 411, "pan.___", state 1961, "((i>=1))"
- line 418, "pan.___", state 1968, "(1)"
- line 418, "pan.___", state 1969, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1969, "else"
- line 418, "pan.___", state 1972, "(1)"
- line 418, "pan.___", state 1973, "(1)"
- line 418, "pan.___", state 1973, "(1)"
- line 420, "pan.___", state 1976, "(1)"
- line 420, "pan.___", state 1976, "(1)"
- line 362, "pan.___", state 1985, "sighand_exec = 1"
- line 403, "pan.___", state 2016, "(1)"
- line 702, "pan.___", state 2304, "-end-"
- (221 of 2304 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.47 seconds
-pan: rate 109876.87 states/second
-pan: avg transition delay 7.7927e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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-1997:0:4249
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-1999:0:4249
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-2003:0:4249
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-2010:1:11
-2011:0:4249
-2012:3:4194
-2013:0:4249
-2014:2:1026
-2015:0:4249
-2016:3:4195
-2017:0:4249
-2018:1:12
-2019:1:16
-2020:1:17
-2021:1:25
-2022:1:26
-2023:1:30
-2024:1:31
-2025:1:39
-2026:1:44
-2027:1:48
-2028:1:49
-2029:1:56
-2030:1:57
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+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10519, errors: 0
- 20146 states, stored
- 191615 states, matched
- 211761 transitions (= stored+matched)
- 711676 atomic steps
-hash conflicts: 1222 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.614 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.509 actual memory usage for states (compression: 93.51%)
- state-vector as stored = 51 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.229 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 174, "pan.___", state 257, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 266, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 279, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 296, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 305, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 318, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 341, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 357, "(1)"
- line 407, "pan.___", state 373, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 386, "(1)"
- line 417, "pan.___", state 416, "(1)"
- line 398, "pan.___", state 442, "(1)"
- line 402, "pan.___", state 456, "(1)"
- line 407, "pan.___", state 472, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 515, "(1)"
- line 402, "pan.___", state 556, "(1)"
- line 407, "pan.___", state 572, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 615, "(1)"
- line 174, "pan.___", state 636, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 638, "(1)"
- line 178, "pan.___", state 645, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 647, "(1)"
- line 178, "pan.___", state 648, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 648, "else"
- line 176, "pan.___", state 653, "((j<1))"
- line 176, "pan.___", state 653, "((j>=1))"
- line 182, "pan.___", state 658, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 660, "(1)"
- line 182, "pan.___", state 661, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 661, "else"
- line 174, "pan.___", state 671, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 673, "(1)"
- line 178, "pan.___", state 680, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 682, "(1)"
- line 178, "pan.___", state 683, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 683, "else"
- line 176, "pan.___", state 688, "((j<1))"
- line 176, "pan.___", state 688, "((j>=1))"
- line 182, "pan.___", state 693, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 695, "(1)"
- line 182, "pan.___", state 696, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 182, "pan.___", state 696, "else"
- line 192, "pan.___", state 701, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 192, "pan.___", state 701, "else"
- line 213, "pan.___", state 705, "((i<1))"
- line 213, "pan.___", state 705, "((i>=1))"
- line 174, "pan.___", state 710, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 712, "(1)"
- line 178, "pan.___", state 719, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 721, "(1)"
- line 178, "pan.___", state 722, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 722, "else"
- line 176, "pan.___", state 727, "((j<1))"
- line 176, "pan.___", state 727, "((j>=1))"
- line 182, "pan.___", state 732, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 734, "(1)"
- line 182, "pan.___", state 735, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 735, "else"
- line 192, "pan.___", state 740, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 192, "pan.___", state 740, "else"
- line 220, "pan.___", state 741, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 741, "else"
- line 355, "pan.___", state 747, "((sighand_exec==1))"
- line 355, "pan.___", state 747, "else"
- line 361, "pan.___", state 750, "sighand_exec = 1"
- line 398, "pan.___", state 763, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 765, "(1)"
- line 398, "pan.___", state 766, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 766, "else"
- line 398, "pan.___", state 769, "(1)"
- line 402, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 779, "(1)"
- line 402, "pan.___", state 780, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 780, "else"
- line 402, "pan.___", state 783, "(1)"
- line 402, "pan.___", state 784, "(1)"
- line 402, "pan.___", state 784, "(1)"
- line 400, "pan.___", state 789, "((i<1))"
- line 400, "pan.___", state 789, "((i>=1))"
- line 407, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 808, "(1)"
- line 408, "pan.___", state 809, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 809, "else"
- line 408, "pan.___", state 812, "(1)"
- line 408, "pan.___", state 813, "(1)"
- line 408, "pan.___", state 813, "(1)"
- line 412, "pan.___", state 821, "(1)"
- line 412, "pan.___", state 822, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 822, "else"
- line 412, "pan.___", state 825, "(1)"
- line 412, "pan.___", state 826, "(1)"
- line 412, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 831, "((i<1))"
- line 410, "pan.___", state 831, "((i>=1))"
- line 417, "pan.___", state 838, "(1)"
- line 417, "pan.___", state 839, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 839, "else"
- line 417, "pan.___", state 842, "(1)"
- line 417, "pan.___", state 843, "(1)"
- line 417, "pan.___", state 843, "(1)"
- line 419, "pan.___", state 846, "(1)"
- line 419, "pan.___", state 846, "(1)"
- line 361, "pan.___", state 855, "sighand_exec = 1"
- line 402, "pan.___", state 886, "(1)"
- line 407, "pan.___", state 902, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 945, "(1)"
- line 402, "pan.___", state 983, "(1)"
- line 407, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1042, "(1)"
- line 398, "pan.___", state 1068, "(1)"
- line 402, "pan.___", state 1082, "(1)"
- line 407, "pan.___", state 1098, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1141, "(1)"
- line 402, "pan.___", state 1182, "(1)"
- line 407, "pan.___", state 1198, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1241, "(1)"
- line 174, "pan.___", state 1262, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1264, "(1)"
- line 178, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1273, "(1)"
- line 178, "pan.___", state 1274, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1274, "else"
- line 176, "pan.___", state 1279, "((j<1))"
- line 176, "pan.___", state 1279, "((j>=1))"
- line 182, "pan.___", state 1284, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1286, "(1)"
- line 182, "pan.___", state 1287, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 1287, "else"
- line 174, "pan.___", state 1297, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1299, "(1)"
- line 178, "pan.___", state 1306, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1308, "(1)"
- line 178, "pan.___", state 1309, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 1309, "else"
- line 176, "pan.___", state 1314, "((j<1))"
- line 176, "pan.___", state 1314, "((j>=1))"
- line 182, "pan.___", state 1319, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1321, "(1)"
- line 182, "pan.___", state 1322, "((cache_dirty_generation_ptr.bitfield&(1<<i)))"
- line 182, "pan.___", state 1322, "else"
- line 192, "pan.___", state 1327, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 192, "pan.___", state 1327, "else"
- line 213, "pan.___", state 1331, "((i<1))"
- line 213, "pan.___", state 1331, "((i>=1))"
- line 174, "pan.___", state 1336, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1338, "(1)"
- line 178, "pan.___", state 1345, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1347, "(1)"
- line 178, "pan.___", state 1348, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1348, "else"
- line 176, "pan.___", state 1353, "((j<1))"
- line 176, "pan.___", state 1353, "((j>=1))"
- line 182, "pan.___", state 1358, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1360, "(1)"
- line 182, "pan.___", state 1361, "((cache_dirty_generation_ptr.bitfield&(1<<0)))"
- line 182, "pan.___", state 1361, "else"
- line 192, "pan.___", state 1366, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 192, "pan.___", state 1366, "else"
- line 220, "pan.___", state 1367, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 1367, "else"
- line 355, "pan.___", state 1373, "((sighand_exec==1))"
- line 355, "pan.___", state 1373, "else"
- line 361, "pan.___", state 1376, "sighand_exec = 1"
- line 398, "pan.___", state 1389, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1391, "(1)"
- line 398, "pan.___", state 1392, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1392, "else"
- line 398, "pan.___", state 1395, "(1)"
- line 402, "pan.___", state 1403, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1405, "(1)"
- line 402, "pan.___", state 1406, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1406, "else"
- line 402, "pan.___", state 1409, "(1)"
- line 402, "pan.___", state 1410, "(1)"
- line 402, "pan.___", state 1410, "(1)"
- line 400, "pan.___", state 1415, "((i<1))"
- line 400, "pan.___", state 1415, "((i>=1))"
- line 407, "pan.___", state 1421, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1434, "(1)"
- line 408, "pan.___", state 1435, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1435, "else"
- line 408, "pan.___", state 1438, "(1)"
- line 408, "pan.___", state 1439, "(1)"
- line 408, "pan.___", state 1439, "(1)"
- line 412, "pan.___", state 1447, "(1)"
- line 412, "pan.___", state 1448, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1448, "else"
- line 412, "pan.___", state 1451, "(1)"
- line 412, "pan.___", state 1452, "(1)"
- line 412, "pan.___", state 1452, "(1)"
- line 410, "pan.___", state 1457, "((i<1))"
- line 410, "pan.___", state 1457, "((i>=1))"
- line 417, "pan.___", state 1464, "(1)"
- line 417, "pan.___", state 1465, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1465, "else"
- line 417, "pan.___", state 1468, "(1)"
- line 417, "pan.___", state 1469, "(1)"
- line 417, "pan.___", state 1469, "(1)"
- line 419, "pan.___", state 1472, "(1)"
- line 419, "pan.___", state 1472, "(1)"
- line 361, "pan.___", state 1481, "sighand_exec = 1"
- line 178, "pan.___", state 1506, "(1)"
- line 182, "pan.___", state 1517, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1530, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1539, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1552, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 701, "pan.___", state 1632, "-end-"
- (167 of 1632 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 747, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.15 seconds
-pan: rate 134306.67 states/second
-pan: avg transition delay 7.0835e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-2:4:2857
-3:4:2860
-4:4:2860
-5:4:2863
-6:4:2871
-7:4:2871
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-9:4:2880
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-16:0:2905
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-35:3:1364
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-43:3:1402
-44:0:2905
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-133:0:2905
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-186:0:2905
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-214:3:2211
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-240:0:2905
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-256:3:2364
-257:3:2375
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-260:3:2388
-261:3:2393
-262:3:2394
-263:0:2905
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-265:0:2905
-266:3:2408
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-269:0:2905
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-282:3:2444
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-284:3:2449
-285:3:2456
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-287:3:2468
-288:3:2469
-289:3:2470
-290:3:2481
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-292:3:2487
-293:0:2905
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-297:0:2905
-298:3:2715
-299:0:2905
-300:3:2716
-301:0:2905
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-303:0:2905
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-309:3:2739
-310:3:2740
-311:3:2744
-312:3:2752
-313:3:2753
-314:0:2905
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-316:0:2905
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-318:3:2766
-319:3:2770
-320:3:2774
-321:3:2775
-322:3:2779
-323:3:2787
-324:3:2788
-325:0:2905
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-327:0:2905
-328:3:2804
-329:3:2805
-330:3:2809
-331:3:2813
-332:3:2814
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+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10499, errors: 0
- 159431 states, stored
- 1505398 states, matched
- 1664829 transitions (= stored+matched)
- 5794809 atomic steps
-hash conflicts: 62144 (resolved)
-
-Stats on memory usage (in Megabytes):
- 12.772 equivalent memory usage for states (stored*(State-vector + overhead))
- 8.936 actual memory usage for states (compression: 69.96%)
- state-vector as stored = 31 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 474.651 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 651, "pan.___", state 213, "(1)"
- line 402, "pan.___", state 348, "(1)"
- line 398, "pan.___", state 433, "(1)"
- line 402, "pan.___", state 447, "(1)"
- line 402, "pan.___", state 547, "(1)"
- line 159, "pan.___", state 628, "(1)"
- line 163, "pan.___", state 636, "(1)"
- line 163, "pan.___", state 637, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 637, "else"
- line 161, "pan.___", state 642, "((j<1))"
- line 161, "pan.___", state 642, "((j>=1))"
- line 167, "pan.___", state 648, "(1)"
- line 167, "pan.___", state 649, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 649, "else"
- line 159, "pan.___", state 660, "(1)"
- line 163, "pan.___", state 668, "(1)"
- line 163, "pan.___", state 669, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 669, "else"
- line 161, "pan.___", state 674, "((j<1))"
- line 161, "pan.___", state 674, "((j>=1))"
- line 167, "pan.___", state 680, "(1)"
- line 167, "pan.___", state 681, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 681, "else"
- line 201, "pan.___", state 686, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 201, "pan.___", state 686, "else"
- line 213, "pan.___", state 690, "((i<1))"
- line 213, "pan.___", state 690, "((i>=1))"
- line 159, "pan.___", state 696, "(1)"
- line 163, "pan.___", state 704, "(1)"
- line 163, "pan.___", state 705, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 705, "else"
- line 161, "pan.___", state 710, "((j<1))"
- line 161, "pan.___", state 710, "((j>=1))"
- line 167, "pan.___", state 716, "(1)"
- line 167, "pan.___", state 717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 717, "else"
- line 201, "pan.___", state 722, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 201, "pan.___", state 722, "else"
- line 220, "pan.___", state 723, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 220, "pan.___", state 723, "else"
- line 355, "pan.___", state 729, "((sighand_exec==1))"
- line 355, "pan.___", state 729, "else"
- line 361, "pan.___", state 732, "sighand_exec = 1"
- line 398, "pan.___", state 745, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 747, "(1)"
- line 398, "pan.___", state 748, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 748, "else"
- line 398, "pan.___", state 751, "(1)"
- line 402, "pan.___", state 759, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 761, "(1)"
- line 402, "pan.___", state 762, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 762, "else"
- line 402, "pan.___", state 765, "(1)"
- line 402, "pan.___", state 766, "(1)"
- line 402, "pan.___", state 766, "(1)"
- line 400, "pan.___", state 771, "((i<1))"
- line 400, "pan.___", state 771, "((i>=1))"
- line 407, "pan.___", state 777, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 790, "(1)"
- line 408, "pan.___", state 791, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 791, "else"
- line 408, "pan.___", state 794, "(1)"
- line 408, "pan.___", state 795, "(1)"
- line 408, "pan.___", state 795, "(1)"
- line 412, "pan.___", state 803, "(1)"
- line 412, "pan.___", state 804, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 804, "else"
- line 412, "pan.___", state 807, "(1)"
- line 412, "pan.___", state 808, "(1)"
- line 412, "pan.___", state 808, "(1)"
- line 410, "pan.___", state 813, "((i<1))"
- line 410, "pan.___", state 813, "((i>=1))"
- line 417, "pan.___", state 820, "(1)"
- line 417, "pan.___", state 821, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 821, "else"
- line 417, "pan.___", state 824, "(1)"
- line 417, "pan.___", state 825, "(1)"
- line 417, "pan.___", state 825, "(1)"
- line 419, "pan.___", state 828, "(1)"
- line 419, "pan.___", state 828, "(1)"
- line 361, "pan.___", state 837, "sighand_exec = 1"
- line 402, "pan.___", state 868, "(1)"
- line 402, "pan.___", state 965, "(1)"
- line 398, "pan.___", state 1050, "(1)"
- line 402, "pan.___", state 1064, "(1)"
- line 402, "pan.___", state 1164, "(1)"
- line 159, "pan.___", state 1245, "(1)"
- line 163, "pan.___", state 1253, "(1)"
- line 163, "pan.___", state 1254, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1254, "else"
- line 161, "pan.___", state 1259, "((j<1))"
- line 161, "pan.___", state 1259, "((j>=1))"
- line 167, "pan.___", state 1265, "(1)"
- line 167, "pan.___", state 1266, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1266, "else"
- line 159, "pan.___", state 1277, "(1)"
- line 163, "pan.___", state 1285, "(1)"
- line 163, "pan.___", state 1286, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 1286, "else"
- line 161, "pan.___", state 1291, "((j<1))"
- line 161, "pan.___", state 1291, "((j>=1))"
- line 167, "pan.___", state 1297, "(1)"
- line 167, "pan.___", state 1298, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 1298, "else"
- line 201, "pan.___", state 1303, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 201, "pan.___", state 1303, "else"
- line 213, "pan.___", state 1307, "((i<1))"
- line 213, "pan.___", state 1307, "((i>=1))"
- line 159, "pan.___", state 1313, "(1)"
- line 163, "pan.___", state 1321, "(1)"
- line 163, "pan.___", state 1322, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1322, "else"
- line 161, "pan.___", state 1327, "((j<1))"
- line 161, "pan.___", state 1327, "((j>=1))"
- line 167, "pan.___", state 1333, "(1)"
- line 167, "pan.___", state 1334, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1334, "else"
- line 201, "pan.___", state 1339, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 201, "pan.___", state 1339, "else"
- line 220, "pan.___", state 1340, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 220, "pan.___", state 1340, "else"
- line 355, "pan.___", state 1346, "((sighand_exec==1))"
- line 355, "pan.___", state 1346, "else"
- line 361, "pan.___", state 1349, "sighand_exec = 1"
- line 398, "pan.___", state 1362, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1364, "(1)"
- line 398, "pan.___", state 1365, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1365, "else"
- line 398, "pan.___", state 1368, "(1)"
- line 402, "pan.___", state 1376, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1378, "(1)"
- line 402, "pan.___", state 1379, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1379, "else"
- line 402, "pan.___", state 1382, "(1)"
- line 402, "pan.___", state 1383, "(1)"
- line 402, "pan.___", state 1383, "(1)"
- line 400, "pan.___", state 1388, "((i<1))"
- line 400, "pan.___", state 1388, "((i>=1))"
- line 407, "pan.___", state 1394, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1407, "(1)"
- line 408, "pan.___", state 1408, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1408, "else"
- line 408, "pan.___", state 1411, "(1)"
- line 408, "pan.___", state 1412, "(1)"
- line 408, "pan.___", state 1412, "(1)"
- line 412, "pan.___", state 1420, "(1)"
- line 412, "pan.___", state 1421, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1421, "else"
- line 412, "pan.___", state 1424, "(1)"
- line 412, "pan.___", state 1425, "(1)"
- line 412, "pan.___", state 1425, "(1)"
- line 410, "pan.___", state 1430, "((i<1))"
- line 410, "pan.___", state 1430, "((i>=1))"
- line 417, "pan.___", state 1437, "(1)"
- line 417, "pan.___", state 1438, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1438, "else"
- line 417, "pan.___", state 1441, "(1)"
- line 417, "pan.___", state 1442, "(1)"
- line 417, "pan.___", state 1442, "(1)"
- line 419, "pan.___", state 1445, "(1)"
- line 419, "pan.___", state 1445, "(1)"
- line 361, "pan.___", state 1454, "sighand_exec = 1"
- line 701, "pan.___", state 1596, "-end-"
- (111 of 1596 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 747, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.23 seconds
-pan: rate 129618.7 states/second
-pan: avg transition delay 7.3881e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-1612:3:2377
-1613:3:2385
-1614:3:2390
-1615:3:2394
-1616:3:2395
-1617:3:2402
-1618:3:2403
-1619:3:2414
-1620:3:2415
-1621:3:2416
-1622:3:2427
-1623:3:2432
-1624:3:2433
-1625:0:2833
-1626:3:2445
-1627:0:2833
-1628:3:2554
-1629:0:2833
-1630:3:2652
-1631:0:2833
-1632:3:2653
-1633:0:2833
-1634:3:2657
-1635:0:2833
-1636:3:2663
-1637:0:2833
-1638:3:2664
-1639:3:2671
-1640:3:2672
-1641:3:2679
-1642:3:2684
-1643:0:2833
-1644:3:2695
-1645:0:2833
-1646:3:2696
-1647:3:2703
-1648:3:2706
-1649:3:2707
-1650:3:2711
-1651:3:2716
-1652:0:2833
-1653:3:2727
-1654:0:2833
-1655:3:2732
-1656:3:2739
-1657:3:2740
-1658:3:2747
-1659:3:2752
-1660:0:2833
-1661:3:2767
-1662:0:2833
-1663:3:2769
-1664:0:2833
-1665:3:2770
-1666:0:2833
-1667:3:2773
-1668:0:2833
-1669:3:2778
-1670:0:2833
-1671:2:1071
-1672:0:2831
-1673:3:2779
-1674:0:2837
-1675:1:288
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 6934, errors: 0
- 7626 states, stored
- 67235 states, matched
- 74861 transitions (= stored+matched)
- 248896 atomic steps
-hash conflicts: 113 (resolved)
-
-Stats on memory usage (in Megabytes):
- 0.611 equivalent memory usage for states (stored*(State-vector + overhead))
- 0.867 actual memory usage for states (unsuccessful compression: 141.88%)
- state-vector as stored = 91 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 466.545 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 159, "pan.___", state 254, "(1)"
- line 163, "pan.___", state 262, "(1)"
- line 167, "pan.___", state 274, "(1)"
- line 174, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 317, "(1)"
- line 163, "pan.___", state 325, "(1)"
- line 167, "pan.___", state 337, "(1)"
- line 174, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 384, "(1)"
- line 163, "pan.___", state 392, "(1)"
- line 167, "pan.___", state 404, "(1)"
- line 398, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 441, "(1)"
- line 407, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 470, "(1)"
- line 417, "pan.___", state 500, "(1)"
- line 398, "pan.___", state 526, "(1)"
- line 402, "pan.___", state 540, "(1)"
- line 407, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 599, "(1)"
- line 402, "pan.___", state 640, "(1)"
- line 407, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 699, "(1)"
- line 174, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 722, "(1)"
- line 178, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 731, "(1)"
- line 178, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 732, "else"
- line 176, "pan.___", state 737, "((j<1))"
- line 176, "pan.___", state 737, "((j>=1))"
- line 182, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 752, "(1)"
- line 163, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 761, "else"
- line 161, "pan.___", state 766, "((j<1))"
- line 161, "pan.___", state 766, "((j>=1))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 773, "else"
- line 169, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 776, "else"
- line 174, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 785, "(1)"
- line 178, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 794, "(1)"
- line 178, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 795, "else"
- line 176, "pan.___", state 800, "((j<1))"
- line 176, "pan.___", state 800, "((j>=1))"
- line 182, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 815, "(1)"
- line 163, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 824, "else"
- line 161, "pan.___", state 829, "((j<1))"
- line 161, "pan.___", state 829, "((j>=1))"
- line 167, "pan.___", state 835, "(1)"
- line 167, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 836, "else"
- line 169, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 839, "else"
- line 201, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 841, "else"
- line 213, "pan.___", state 845, "((i<1))"
- line 213, "pan.___", state 845, "((i>=1))"
- line 174, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 852, "(1)"
- line 178, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 861, "(1)"
- line 178, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 862, "else"
- line 176, "pan.___", state 867, "((j<1))"
- line 176, "pan.___", state 867, "((j>=1))"
- line 182, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 882, "(1)"
- line 163, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 891, "else"
- line 161, "pan.___", state 896, "((j<1))"
- line 161, "pan.___", state 896, "((j>=1))"
- line 167, "pan.___", state 902, "(1)"
- line 167, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 903, "else"
- line 169, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 906, "else"
- line 201, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 908, "else"
- line 220, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 909, "else"
- line 355, "pan.___", state 915, "((sighand_exec==1))"
- line 355, "pan.___", state 915, "else"
- line 361, "pan.___", state 918, "sighand_exec = 1"
- line 398, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 933, "(1)"
- line 398, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 934, "else"
- line 398, "pan.___", state 937, "(1)"
- line 402, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 947, "(1)"
- line 402, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 948, "else"
- line 402, "pan.___", state 951, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 400, "pan.___", state 957, "((i<1))"
- line 400, "pan.___", state 957, "((i>=1))"
- line 407, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 976, "(1)"
- line 408, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 977, "else"
- line 408, "pan.___", state 980, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 412, "pan.___", state 989, "(1)"
- line 412, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 990, "else"
- line 412, "pan.___", state 993, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 410, "pan.___", state 999, "((i<1))"
- line 410, "pan.___", state 999, "((i>=1))"
- line 417, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1007, "else"
- line 417, "pan.___", state 1010, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 361, "pan.___", state 1023, "sighand_exec = 1"
- line 178, "pan.___", state 1048, "(1)"
- line 182, "pan.___", state 1059, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1069, "(1)"
- line 163, "pan.___", state 1077, "(1)"
- line 167, "pan.___", state 1089, "(1)"
- line 174, "pan.___", state 1100, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1109, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1122, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1132, "(1)"
- line 163, "pan.___", state 1140, "(1)"
- line 167, "pan.___", state 1152, "(1)"
- line 174, "pan.___", state 1167, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1176, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1189, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1199, "(1)"
- line 163, "pan.___", state 1207, "(1)"
- line 167, "pan.___", state 1219, "(1)"
- line 701, "pan.___", state 1258, "-end-"
- (128 of 1258 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 747, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.05 seconds
-pan: rate 152520 states/second
-pan: avg transition delay 6.679e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-4:4:2859
-5:4:2862
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-7:4:2870
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-16:0:2904
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-44:0:2904
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-48:3:1753
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-104:3:1960
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-108:0:2904
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-113:3:1997
-114:3:2001
-115:3:2002
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-117:3:2014
-118:3:2015
-119:3:2020
-120:3:2027
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-122:3:2035
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-287:0:2904
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-319:0:2904
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-328:3:1884
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-330:3:1890
-331:3:1897
-332:3:1898
-333:3:1905
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-339:3:1926
-340:3:1930
-341:3:1934
-342:3:1935
-343:3:1939
-344:3:1947
-345:3:1948
-346:3:1953
-347:3:1960
-348:3:1961
-349:3:1968
-350:3:1973
-351:0:2904
-352:3:1984
-353:0:2904
-354:3:1992
-355:3:1993
-356:3:1997
-357:3:2001
-358:3:2002
-359:3:2006
-360:3:2014
-361:3:2015
-362:3:2020
-363:3:2027
-364:3:2028
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-1263:3:2182
-1264:3:2186
-1265:3:2187
-1266:3:2194
-1267:3:2195
-1268:3:2206
-1269:3:2207
-1270:3:2208
-1271:3:2219
-1272:3:2224
-1273:3:2225
-1274:0:2904
-1275:3:2237
-1276:0:2904
-1277:3:2239
-1278:0:2904
-1279:3:2240
-1280:0:2904
-1281:3:2241
-1282:0:2904
-1283:3:2242
-1284:0:2904
-1285:3:2243
-1286:3:2247
-1287:3:2248
-1288:3:2256
-1289:3:2257
-1290:3:2261
-1291:3:2262
-1292:3:2270
-1293:3:2275
-1294:3:2279
-1295:3:2280
-1296:3:2287
-1297:3:2288
-1298:3:2299
-1299:3:2300
-1300:3:2301
-1301:3:2312
-1302:3:2317
-1303:3:2318
-1304:0:2904
-1305:3:2330
-1306:0:2904
-1307:3:2532
-1308:0:2904
-1309:3:2630
-1310:0:2904
-1311:3:2631
-1312:0:2904
-1313:3:2635
-1314:0:2904
-1315:3:2641
-1316:0:2904
-1317:3:2645
-1318:3:2646
-1319:3:2650
-1320:3:2654
-1321:3:2655
-1322:3:2659
-1323:3:2667
-1324:3:2668
-1325:3:2673
-1326:3:2680
-1327:3:2681
-1328:3:2688
-1329:3:2693
-1330:0:2904
-1331:3:2704
-1332:0:2904
-1333:3:2708
-1334:3:2709
-1335:3:2713
-1336:3:2717
-1337:3:2718
-1338:3:2722
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-1345:3:2756
-1346:0:2904
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-1354:3:2789
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-1357:3:2803
-1358:3:2810
-1359:3:2811
-1360:3:2818
-1361:3:2823
-1362:0:2904
-1363:3:2838
-1364:0:2904
-1365:3:2840
-1366:0:2904
-1367:3:2841
-1368:0:2904
-1369:3:2844
-1370:0:2904
-1371:3:2849
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-1373:2:1350
-1374:0:2902
-1375:3:2850
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-1377:1:296
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-depth 12: Claim reached state 9 (line 747)
-depth 86: Claim reached state 9 (line 746)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10679, errors: 0
- 38182 states, stored (88898 visited)
- 997091 states, matched
- 1085989 transitions (= visited+matched)
- 3694897 atomic steps
-hash conflicts: 9602 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3.059 equivalent memory usage for states (stored*(State-vector + overhead))
- 2.930 actual memory usage for states (compression: 95.79%)
- state-vector as stored = 52 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 468.596 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 159, "pan.___", state 254, "(1)"
- line 163, "pan.___", state 262, "(1)"
- line 167, "pan.___", state 274, "(1)"
- line 174, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 317, "(1)"
- line 163, "pan.___", state 325, "(1)"
- line 167, "pan.___", state 337, "(1)"
- line 174, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 384, "(1)"
- line 163, "pan.___", state 392, "(1)"
- line 167, "pan.___", state 404, "(1)"
- line 398, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 441, "(1)"
- line 407, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 470, "(1)"
- line 417, "pan.___", state 500, "(1)"
- line 398, "pan.___", state 526, "(1)"
- line 402, "pan.___", state 540, "(1)"
- line 407, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 599, "(1)"
- line 402, "pan.___", state 640, "(1)"
- line 407, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 699, "(1)"
- line 174, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 722, "(1)"
- line 178, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 731, "(1)"
- line 178, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 732, "else"
- line 176, "pan.___", state 737, "((j<1))"
- line 176, "pan.___", state 737, "((j>=1))"
- line 182, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 752, "(1)"
- line 163, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 761, "else"
- line 161, "pan.___", state 766, "((j<1))"
- line 161, "pan.___", state 766, "((j>=1))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 773, "else"
- line 169, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 776, "else"
- line 174, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 785, "(1)"
- line 178, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 794, "(1)"
- line 178, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 795, "else"
- line 176, "pan.___", state 800, "((j<1))"
- line 176, "pan.___", state 800, "((j>=1))"
- line 182, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 815, "(1)"
- line 163, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 824, "else"
- line 161, "pan.___", state 829, "((j<1))"
- line 161, "pan.___", state 829, "((j>=1))"
- line 167, "pan.___", state 835, "(1)"
- line 167, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 836, "else"
- line 169, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 839, "else"
- line 201, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 841, "else"
- line 213, "pan.___", state 845, "((i<1))"
- line 213, "pan.___", state 845, "((i>=1))"
- line 174, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 852, "(1)"
- line 178, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 861, "(1)"
- line 178, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 862, "else"
- line 176, "pan.___", state 867, "((j<1))"
- line 176, "pan.___", state 867, "((j>=1))"
- line 182, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 882, "(1)"
- line 163, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 891, "else"
- line 161, "pan.___", state 896, "((j<1))"
- line 161, "pan.___", state 896, "((j>=1))"
- line 167, "pan.___", state 902, "(1)"
- line 167, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 903, "else"
- line 169, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 906, "else"
- line 201, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 908, "else"
- line 220, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 909, "else"
- line 355, "pan.___", state 915, "((sighand_exec==1))"
- line 355, "pan.___", state 915, "else"
- line 361, "pan.___", state 918, "sighand_exec = 1"
- line 398, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 933, "(1)"
- line 398, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 934, "else"
- line 398, "pan.___", state 937, "(1)"
- line 402, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 947, "(1)"
- line 402, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 948, "else"
- line 402, "pan.___", state 951, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 400, "pan.___", state 957, "((i<1))"
- line 400, "pan.___", state 957, "((i>=1))"
- line 407, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 976, "(1)"
- line 408, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 977, "else"
- line 408, "pan.___", state 980, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 412, "pan.___", state 989, "(1)"
- line 412, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 990, "else"
- line 412, "pan.___", state 993, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 410, "pan.___", state 999, "((i<1))"
- line 410, "pan.___", state 999, "((i>=1))"
- line 417, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1007, "else"
- line 417, "pan.___", state 1010, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 361, "pan.___", state 1023, "sighand_exec = 1"
- line 402, "pan.___", state 1054, "(1)"
- line 407, "pan.___", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1113, "(1)"
- line 402, "pan.___", state 1151, "(1)"
- line 407, "pan.___", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1210, "(1)"
- line 398, "pan.___", state 1236, "(1)"
- line 402, "pan.___", state 1250, "(1)"
- line 407, "pan.___", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1309, "(1)"
- line 402, "pan.___", state 1350, "(1)"
- line 407, "pan.___", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1409, "(1)"
- line 174, "pan.___", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1432, "(1)"
- line 178, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1441, "(1)"
- line 178, "pan.___", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1442, "else"
- line 176, "pan.___", state 1447, "((j<1))"
- line 176, "pan.___", state 1447, "((j>=1))"
- line 182, "pan.___", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1462, "(1)"
- line 163, "pan.___", state 1470, "(1)"
- line 163, "pan.___", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1471, "else"
- line 161, "pan.___", state 1476, "((j<1))"
- line 161, "pan.___", state 1476, "((j>=1))"
- line 167, "pan.___", state 1482, "(1)"
- line 167, "pan.___", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1483, "else"
- line 169, "pan.___", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1486, "else"
- line 174, "pan.___", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1495, "(1)"
- line 178, "pan.___", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1504, "(1)"
- line 178, "pan.___", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 1505, "else"
- line 176, "pan.___", state 1510, "((j<1))"
- line 176, "pan.___", state 1510, "((j>=1))"
- line 182, "pan.___", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1525, "(1)"
- line 163, "pan.___", state 1533, "(1)"
- line 163, "pan.___", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 1534, "else"
- line 161, "pan.___", state 1539, "((j<1))"
- line 161, "pan.___", state 1539, "((j>=1))"
- line 167, "pan.___", state 1545, "(1)"
- line 167, "pan.___", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 1546, "else"
- line 169, "pan.___", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 1549, "else"
- line 201, "pan.___", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 1551, "else"
- line 213, "pan.___", state 1555, "((i<1))"
- line 213, "pan.___", state 1555, "((i>=1))"
- line 174, "pan.___", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1562, "(1)"
- line 178, "pan.___", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1571, "(1)"
- line 178, "pan.___", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1572, "else"
- line 176, "pan.___", state 1577, "((j<1))"
- line 176, "pan.___", state 1577, "((j>=1))"
- line 182, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1592, "(1)"
- line 163, "pan.___", state 1600, "(1)"
- line 163, "pan.___", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1601, "else"
- line 161, "pan.___", state 1606, "((j<1))"
- line 161, "pan.___", state 1606, "((j>=1))"
- line 167, "pan.___", state 1612, "(1)"
- line 167, "pan.___", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1613, "else"
- line 169, "pan.___", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1616, "else"
- line 201, "pan.___", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 1618, "else"
- line 220, "pan.___", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 1619, "else"
- line 355, "pan.___", state 1625, "((sighand_exec==1))"
- line 355, "pan.___", state 1625, "else"
- line 361, "pan.___", state 1628, "sighand_exec = 1"
- line 398, "pan.___", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1643, "(1)"
- line 398, "pan.___", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1644, "else"
- line 398, "pan.___", state 1647, "(1)"
- line 402, "pan.___", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1657, "(1)"
- line 402, "pan.___", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1658, "else"
- line 402, "pan.___", state 1661, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 400, "pan.___", state 1667, "((i<1))"
- line 400, "pan.___", state 1667, "((i>=1))"
- line 407, "pan.___", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1686, "(1)"
- line 408, "pan.___", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1687, "else"
- line 408, "pan.___", state 1690, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 412, "pan.___", state 1699, "(1)"
- line 412, "pan.___", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1700, "else"
- line 412, "pan.___", state 1703, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 410, "pan.___", state 1709, "((i<1))"
- line 410, "pan.___", state 1709, "((i>=1))"
- line 417, "pan.___", state 1716, "(1)"
- line 417, "pan.___", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1717, "else"
- line 417, "pan.___", state 1720, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 361, "pan.___", state 1733, "sighand_exec = 1"
- line 178, "pan.___", state 1758, "(1)"
- line 182, "pan.___", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1779, "(1)"
- line 163, "pan.___", state 1787, "(1)"
- line 167, "pan.___", state 1799, "(1)"
- line 174, "pan.___", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1842, "(1)"
- line 163, "pan.___", state 1850, "(1)"
- line 167, "pan.___", state 1862, "(1)"
- line 174, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1909, "(1)"
- line 163, "pan.___", state 1917, "(1)"
- line 167, "pan.___", state 1929, "(1)"
- line 701, "pan.___", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.85 seconds
-pan: rate 104585.88 states/second
-pan: avg transition delay 7.827e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4401
-2:4:4353
-3:4:4356
-4:4:4356
-5:4:4359
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-16:0:4401
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-44:0:4401
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-853:3:2974
-854:3:2975
-855:3:2987
-856:3:2988
-857:3:2992
-858:3:2993
-859:3:3001
-860:3:3006
-861:3:3010
-862:3:3011
-863:3:3018
-864:3:3019
-865:3:3030
-866:3:3031
-867:3:3032
-868:3:3043
-869:3:3048
-870:3:3049
-871:0:4401
-872:3:3061
-873:0:4401
-874:3:3063
-875:0:4401
-876:3:3064
-877:0:4401
-878:3:3065
-879:0:4401
-880:3:3066
-881:0:4401
-882:3:3067
-883:3:3071
-884:3:3072
-885:3:3080
-886:3:3081
-887:3:3085
-888:3:3086
-889:3:3094
-890:3:3099
-891:3:3103
-892:3:3104
-893:3:3111
-894:3:3112
-895:3:3123
-896:3:3124
-897:3:3125
-898:3:3136
-899:3:3141
-900:3:3142
-901:0:4401
-902:3:3154
-903:0:4401
-904:3:3356
-905:0:4401
-906:3:3454
-907:0:4401
-908:3:3455
-909:0:4401
-910:3:3459
-911:0:4401
-912:3:3465
-913:3:3469
-914:3:3470
-915:3:3478
-916:3:3479
-917:3:3483
-918:3:3484
-919:3:3492
-920:3:3497
-921:3:3501
-922:3:3502
-923:3:3509
-924:3:3510
-925:3:3521
-926:3:3522
-927:3:3523
-928:3:3534
-929:3:3539
-930:3:3540
-931:0:4401
-932:3:3552
-933:0:4401
-934:3:3554
-935:0:4401
-936:3:3555
-937:3:3559
-938:3:3560
-939:3:3568
-940:3:3569
-941:3:3573
-942:3:3574
-943:3:3582
-944:3:3587
-945:3:3591
-946:3:3592
-947:3:3599
-948:3:3600
-949:3:3611
-950:3:3612
-951:3:3613
-952:3:3624
-953:3:3629
-954:3:3630
-955:0:4401
-956:3:3642
-957:0:4401
-958:3:3644
-959:0:4401
-960:3:3647
-961:3:3648
-962:3:3660
-963:3:3661
-964:3:3665
-965:3:3666
-966:3:3674
-967:3:3679
-968:3:3683
-969:3:3684
-970:3:3691
-971:3:3692
-972:3:3703
-973:3:3704
-974:3:3705
-975:3:3716
-976:3:3721
-977:3:3722
-978:0:4401
-979:3:3734
-980:0:4401
-981:3:3736
-982:0:4401
-983:3:3737
-984:0:4401
-985:3:3738
-986:0:4401
-987:3:3739
-988:0:4401
-989:3:3740
-990:3:3744
-991:3:3745
-992:3:3753
-993:3:3754
-994:3:3758
-995:3:3759
-996:3:3767
-997:3:3772
-998:3:3776
-999:3:3777
-1000:3:3784
-1001:3:3785
-1002:3:3796
-1003:3:3797
-1004:3:3798
-1005:3:3809
-1006:3:3814
-1007:3:3815
-1008:0:4401
-1009:3:3827
-1010:0:4401
-1011:3:4029
-1012:0:4401
-1013:3:4127
-1014:0:4401
-1015:3:4128
-1016:0:4401
-1017:3:4132
-1018:0:4401
-1019:3:4138
-1020:0:4401
-1021:3:4142
-1022:3:4143
-1023:3:4147
-1024:3:4151
-1025:3:4152
-1026:3:4156
-1027:3:4164
-1028:3:4165
-1029:3:4170
-1030:3:4177
-1031:3:4178
-1032:3:4185
-1033:3:4190
-1034:0:4401
-1035:3:4201
-1036:0:4401
-1037:3:4205
-1038:3:4206
-1039:3:4210
-1040:3:4214
-1041:3:4215
-1042:3:4219
-1043:3:4227
-1044:3:4228
-1045:3:4233
-1046:3:4240
-1047:3:4241
-1048:3:4248
-1049:3:4253
-1050:0:4401
-1051:3:4264
-1052:0:4401
-1053:3:4272
-1054:3:4273
-1055:3:4277
-1056:3:4281
-1057:3:4282
-1058:3:4286
-1059:3:4294
-1060:3:4295
-1061:3:4300
-1062:3:4307
-1063:3:4308
-1064:3:4315
-1065:3:4320
-1066:0:4401
-1067:3:4335
-1068:0:4401
-1069:3:4337
-1070:0:4401
-1071:3:4338
-1072:0:4401
-1073:3:4341
-1074:0:4401
-1075:3:4346
-1076:0:4401
-1077:2:1236
-1078:0:4401
-1079:3:4347
-1080:0:4401
-1081:2:1242
-1082:0:4401
-1083:3:4346
-1084:0:4401
-1085:2:1243
-1086:0:4401
-1087:3:4347
-1088:0:4401
-1089:2:1244
-1090:0:4401
-1091:3:4346
-1092:0:4401
-1093:2:1245
-1094:0:4401
-1095:3:4347
-1096:0:4401
-1097:1:2
-1098:0:4401
-1099:3:4346
-1100:0:4401
-1101:2:1246
-1102:0:4401
-1103:3:4347
-1104:0:4401
-1105:1:8
-1106:0:4401
-1107:3:4346
-1108:0:4401
-1109:2:1245
-1110:0:4401
-1111:3:4347
-1112:0:4401
-1113:1:9
-1114:0:4401
-1115:3:4346
-1116:0:4401
-1117:2:1246
-1118:0:4401
-1119:3:4347
-1120:0:4401
-1121:1:10
-1122:0:4401
-1123:3:4346
-1124:0:4401
-1125:2:1245
-1126:0:4401
-1127:3:4347
-1128:0:4401
-1129:1:11
-1130:0:4401
-1131:3:4346
-1132:0:4401
-1133:2:1246
-1134:0:4401
-1135:3:4347
-1136:0:4401
-1137:1:14
-1138:0:4401
-1139:3:4346
-1140:0:4401
-1141:2:1245
-1142:0:4401
-1143:3:4347
-1144:0:4401
-1145:1:15
-1146:0:4401
-1147:3:4346
-1148:0:4401
-1149:2:1246
-1150:0:4401
-1151:3:4347
-1152:0:4401
-1153:1:16
-1154:1:20
-1155:1:21
-1156:1:29
-1157:1:30
-1158:1:34
-1159:1:35
-1160:1:43
-1161:1:48
-1162:1:52
-1163:1:53
-1164:1:60
-1165:1:61
-1166:1:72
-1167:1:73
-1168:1:74
-1169:1:85
-1170:1:90
-1171:1:91
-1172:0:4401
-1173:3:4346
-1174:0:4401
-1175:2:1245
-1176:0:4401
-1177:3:4347
-1178:0:4401
-1179:1:103
-1180:0:4401
-1181:3:4346
-1182:0:4401
-1183:2:1246
-1184:0:4401
-1185:3:4347
-1186:0:4401
-1187:2:1247
-1188:0:4401
-1189:3:4346
-1190:0:4401
-1191:2:1253
-1192:0:4401
-1193:3:4347
-1194:0:4401
-1195:2:1254
-1196:0:4399
-1197:3:4346
-1198:0:4405
-1199:3:4347
-1200:0:4405
-1201:2:1257
-1202:0:4405
-1203:3:4346
-1204:0:4405
-1205:2:1258
-1206:0:4405
-1207:3:4347
-1208:0:4405
-1209:2:1259
-1210:2:1263
-1211:2:1264
-1212:2:1272
-1213:2:1273
-1214:2:1277
-1215:2:1278
-1216:2:1286
-1217:2:1291
-1218:2:1295
-1219:2:1296
-1220:2:1303
-1221:2:1304
-1222:2:1315
-1223:2:1316
-1224:2:1317
-1225:2:1328
-1226:2:1333
-1227:2:1334
-1228:0:4405
-1229:3:4346
-1230:0:4405
-1231:2:1346
-1232:0:4405
-1233:3:4347
-1234:0:4405
-1235:2:1347
-1236:0:4405
-1237:3:4346
-1238:0:4405
-1239:1:104
--1:-1:-1
-1240:0:4405
-1241:3:4347
-1242:0:4405
-1243:3:4346
-1244:0:4405
-1245:2:1348
-1246:0:4405
-1247:3:4347
-1248:0:4405
-1249:2:1347
-1250:0:4405
-1251:3:4346
-1252:0:4405
-1253:1:105
-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-depth 12: Claim reached state 9 (line 747)
-depth 28: Claim reached state 9 (line 746)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10679, errors: 0
- 38555 states, stored (92500 visited)
- 1044204 states, matched
- 1136704 transitions (= visited+matched)
- 3867169 atomic steps
-hash conflicts: 8572 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3.089 equivalent memory usage for states (stored*(State-vector + overhead))
- 2.930 actual memory usage for states (compression: 94.87%)
- state-vector as stored = 52 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 468.596 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 402, "pan.___", state 330, "(1)"
- line 613, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 59, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 160, "(1)"
- line 651, "pan.___", state 213, "(1)"
- line 174, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 233, "(1)"
- line 159, "pan.___", state 254, "(1)"
- line 163, "pan.___", state 262, "(1)"
- line 167, "pan.___", state 274, "(1)"
- line 174, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 317, "(1)"
- line 163, "pan.___", state 325, "(1)"
- line 167, "pan.___", state 337, "(1)"
- line 174, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 384, "(1)"
- line 163, "pan.___", state 392, "(1)"
- line 167, "pan.___", state 404, "(1)"
- line 398, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 402, "pan.___", state 441, "(1)"
- line 407, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 470, "(1)"
- line 417, "pan.___", state 500, "(1)"
- line 398, "pan.___", state 526, "(1)"
- line 402, "pan.___", state 540, "(1)"
- line 407, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 599, "(1)"
- line 402, "pan.___", state 640, "(1)"
- line 407, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 699, "(1)"
- line 174, "pan.___", state 720, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 722, "(1)"
- line 178, "pan.___", state 729, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 731, "(1)"
- line 178, "pan.___", state 732, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 732, "else"
- line 176, "pan.___", state 737, "((j<1))"
- line 176, "pan.___", state 737, "((j>=1))"
- line 182, "pan.___", state 742, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 752, "(1)"
- line 163, "pan.___", state 760, "(1)"
- line 163, "pan.___", state 761, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 761, "else"
- line 161, "pan.___", state 766, "((j<1))"
- line 161, "pan.___", state 766, "((j>=1))"
- line 167, "pan.___", state 772, "(1)"
- line 167, "pan.___", state 773, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 773, "else"
- line 169, "pan.___", state 776, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 776, "else"
- line 174, "pan.___", state 783, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 785, "(1)"
- line 178, "pan.___", state 792, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 794, "(1)"
- line 178, "pan.___", state 795, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 795, "else"
- line 176, "pan.___", state 800, "((j<1))"
- line 176, "pan.___", state 800, "((j>=1))"
- line 182, "pan.___", state 805, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 815, "(1)"
- line 163, "pan.___", state 823, "(1)"
- line 163, "pan.___", state 824, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 824, "else"
- line 161, "pan.___", state 829, "((j<1))"
- line 161, "pan.___", state 829, "((j>=1))"
- line 167, "pan.___", state 835, "(1)"
- line 167, "pan.___", state 836, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 836, "else"
- line 169, "pan.___", state 839, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 839, "else"
- line 201, "pan.___", state 841, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 841, "else"
- line 213, "pan.___", state 845, "((i<1))"
- line 213, "pan.___", state 845, "((i>=1))"
- line 174, "pan.___", state 850, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 852, "(1)"
- line 178, "pan.___", state 859, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 861, "(1)"
- line 178, "pan.___", state 862, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 862, "else"
- line 176, "pan.___", state 867, "((j<1))"
- line 176, "pan.___", state 867, "((j>=1))"
- line 182, "pan.___", state 872, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 882, "(1)"
- line 163, "pan.___", state 890, "(1)"
- line 163, "pan.___", state 891, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 891, "else"
- line 161, "pan.___", state 896, "((j<1))"
- line 161, "pan.___", state 896, "((j>=1))"
- line 167, "pan.___", state 902, "(1)"
- line 167, "pan.___", state 903, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 903, "else"
- line 169, "pan.___", state 906, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 906, "else"
- line 201, "pan.___", state 908, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 908, "else"
- line 220, "pan.___", state 909, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 909, "else"
- line 355, "pan.___", state 915, "((sighand_exec==1))"
- line 355, "pan.___", state 915, "else"
- line 361, "pan.___", state 918, "sighand_exec = 1"
- line 398, "pan.___", state 931, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 933, "(1)"
- line 398, "pan.___", state 934, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 934, "else"
- line 398, "pan.___", state 937, "(1)"
- line 402, "pan.___", state 945, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 947, "(1)"
- line 402, "pan.___", state 948, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 948, "else"
- line 402, "pan.___", state 951, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 402, "pan.___", state 952, "(1)"
- line 400, "pan.___", state 957, "((i<1))"
- line 400, "pan.___", state 957, "((i>=1))"
- line 407, "pan.___", state 963, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 976, "(1)"
- line 408, "pan.___", state 977, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 977, "else"
- line 408, "pan.___", state 980, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 408, "pan.___", state 981, "(1)"
- line 412, "pan.___", state 989, "(1)"
- line 412, "pan.___", state 990, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 990, "else"
- line 412, "pan.___", state 993, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 412, "pan.___", state 994, "(1)"
- line 410, "pan.___", state 999, "((i<1))"
- line 410, "pan.___", state 999, "((i>=1))"
- line 417, "pan.___", state 1006, "(1)"
- line 417, "pan.___", state 1007, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1007, "else"
- line 417, "pan.___", state 1010, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 417, "pan.___", state 1011, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 419, "pan.___", state 1014, "(1)"
- line 361, "pan.___", state 1023, "sighand_exec = 1"
- line 402, "pan.___", state 1054, "(1)"
- line 407, "pan.___", state 1070, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1113, "(1)"
- line 402, "pan.___", state 1151, "(1)"
- line 407, "pan.___", state 1167, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1210, "(1)"
- line 398, "pan.___", state 1236, "(1)"
- line 402, "pan.___", state 1250, "(1)"
- line 407, "pan.___", state 1266, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1309, "(1)"
- line 402, "pan.___", state 1350, "(1)"
- line 407, "pan.___", state 1366, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 417, "pan.___", state 1409, "(1)"
- line 174, "pan.___", state 1430, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1432, "(1)"
- line 178, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1441, "(1)"
- line 178, "pan.___", state 1442, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1442, "else"
- line 176, "pan.___", state 1447, "((j<1))"
- line 176, "pan.___", state 1447, "((j>=1))"
- line 182, "pan.___", state 1452, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1462, "(1)"
- line 163, "pan.___", state 1470, "(1)"
- line 163, "pan.___", state 1471, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1471, "else"
- line 161, "pan.___", state 1476, "((j<1))"
- line 161, "pan.___", state 1476, "((j>=1))"
- line 167, "pan.___", state 1482, "(1)"
- line 167, "pan.___", state 1483, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1483, "else"
- line 169, "pan.___", state 1486, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1486, "else"
- line 174, "pan.___", state 1493, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 174, "pan.___", state 1495, "(1)"
- line 178, "pan.___", state 1502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1504, "(1)"
- line 178, "pan.___", state 1505, "((cache_dirty_urcu_active_readers.bitfield&(1<<i)))"
- line 178, "pan.___", state 1505, "else"
- line 176, "pan.___", state 1510, "((j<1))"
- line 176, "pan.___", state 1510, "((j>=1))"
- line 182, "pan.___", state 1515, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1525, "(1)"
- line 163, "pan.___", state 1533, "(1)"
- line 163, "pan.___", state 1534, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 163, "pan.___", state 1534, "else"
- line 161, "pan.___", state 1539, "((j<1))"
- line 161, "pan.___", state 1539, "((j>=1))"
- line 167, "pan.___", state 1545, "(1)"
- line 167, "pan.___", state 1546, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 167, "pan.___", state 1546, "else"
- line 169, "pan.___", state 1549, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 169, "pan.___", state 1549, "else"
- line 201, "pan.___", state 1551, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<i)))"
- line 201, "pan.___", state 1551, "else"
- line 213, "pan.___", state 1555, "((i<1))"
- line 213, "pan.___", state 1555, "((i>=1))"
- line 174, "pan.___", state 1560, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 174, "pan.___", state 1562, "(1)"
- line 178, "pan.___", state 1569, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1571, "(1)"
- line 178, "pan.___", state 1572, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 178, "pan.___", state 1572, "else"
- line 176, "pan.___", state 1577, "((j<1))"
- line 176, "pan.___", state 1577, "((j>=1))"
- line 182, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1592, "(1)"
- line 163, "pan.___", state 1600, "(1)"
- line 163, "pan.___", state 1601, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 163, "pan.___", state 1601, "else"
- line 161, "pan.___", state 1606, "((j<1))"
- line 161, "pan.___", state 1606, "((j>=1))"
- line 167, "pan.___", state 1612, "(1)"
- line 167, "pan.___", state 1613, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 167, "pan.___", state 1613, "else"
- line 169, "pan.___", state 1616, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 169, "pan.___", state 1616, "else"
- line 201, "pan.___", state 1618, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 201, "pan.___", state 1618, "else"
- line 220, "pan.___", state 1619, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 220, "pan.___", state 1619, "else"
- line 355, "pan.___", state 1625, "((sighand_exec==1))"
- line 355, "pan.___", state 1625, "else"
- line 361, "pan.___", state 1628, "sighand_exec = 1"
- line 398, "pan.___", state 1641, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 398, "pan.___", state 1643, "(1)"
- line 398, "pan.___", state 1644, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 398, "pan.___", state 1644, "else"
- line 398, "pan.___", state 1647, "(1)"
- line 402, "pan.___", state 1655, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 402, "pan.___", state 1657, "(1)"
- line 402, "pan.___", state 1658, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 402, "pan.___", state 1658, "else"
- line 402, "pan.___", state 1661, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 402, "pan.___", state 1662, "(1)"
- line 400, "pan.___", state 1667, "((i<1))"
- line 400, "pan.___", state 1667, "((i>=1))"
- line 407, "pan.___", state 1673, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 1686, "(1)"
- line 408, "pan.___", state 1687, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 408, "pan.___", state 1687, "else"
- line 408, "pan.___", state 1690, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 408, "pan.___", state 1691, "(1)"
- line 412, "pan.___", state 1699, "(1)"
- line 412, "pan.___", state 1700, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 412, "pan.___", state 1700, "else"
- line 412, "pan.___", state 1703, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 412, "pan.___", state 1704, "(1)"
- line 410, "pan.___", state 1709, "((i<1))"
- line 410, "pan.___", state 1709, "((i>=1))"
- line 417, "pan.___", state 1716, "(1)"
- line 417, "pan.___", state 1717, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 417, "pan.___", state 1717, "else"
- line 417, "pan.___", state 1720, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 417, "pan.___", state 1721, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 419, "pan.___", state 1724, "(1)"
- line 361, "pan.___", state 1733, "sighand_exec = 1"
- line 178, "pan.___", state 1758, "(1)"
- line 182, "pan.___", state 1769, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1779, "(1)"
- line 163, "pan.___", state 1787, "(1)"
- line 167, "pan.___", state 1799, "(1)"
- line 174, "pan.___", state 1810, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 178, "pan.___", state 1819, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1832, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1842, "(1)"
- line 163, "pan.___", state 1850, "(1)"
- line 167, "pan.___", state 1862, "(1)"
- line 174, "pan.___", state 1877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 178, "pan.___", state 1886, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 182, "pan.___", state 1899, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 159, "pan.___", state 1909, "(1)"
- line 163, "pan.___", state 1917, "(1)"
- line 167, "pan.___", state 1929, "(1)"
- line 701, "pan.___", state 1968, "-end-"
- (215 of 1968 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.89 seconds
-pan: rate 103932.58 states/second
-pan: avg transition delay 7.8297e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-depth 12: Claim reached state 9 (line 748)
-depth 28: Claim reached state 9 (line 747)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 10679, errors: 0
- 38555 states, stored (92500 visited)
- 1044204 states, matched
- 1136704 transitions (= visited+matched)
- 3867169 atomic steps
-hash conflicts: 6390 (resolved)
-
-Stats on memory usage (in Megabytes):
- 3.089 equivalent memory usage for states (stored*(State-vector + overhead))
- 2.767 actual memory usage for states (compression: 89.58%)
- state-vector as stored = 47 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 468.498 total actual memory usage
-
-unreached in proctype urcu_reader_sig
- line 403, "pan.___", state 330, "(1)"
- line 614, "pan.___", state 411, "-end-"
- (2 of 411 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 59, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 115, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 160, "(1)"
- line 652, "pan.___", state 213, "(1)"
- line 175, "pan.___", state 222, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 179, "pan.___", state 233, "(1)"
- line 160, "pan.___", state 254, "(1)"
- line 164, "pan.___", state 262, "(1)"
- line 168, "pan.___", state 274, "(1)"
- line 175, "pan.___", state 285, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 179, "pan.___", state 294, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 183, "pan.___", state 307, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 317, "(1)"
- line 164, "pan.___", state 325, "(1)"
- line 168, "pan.___", state 337, "(1)"
- line 175, "pan.___", state 352, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 179, "pan.___", state 361, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 183, "pan.___", state 374, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 160, "pan.___", state 384, "(1)"
- line 164, "pan.___", state 392, "(1)"
- line 168, "pan.___", state 404, "(1)"
- line 399, "pan.___", state 425, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 403, "pan.___", state 441, "(1)"
- line 408, "pan.___", state 457, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 500, "(1)"
- line 399, "pan.___", state 526, "(1)"
- line 403, "pan.___", state 540, "(1)"
- line 408, "pan.___", state 556, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 599, "(1)"
- line 403, "pan.___", state 640, "(1)"
- line 408, "pan.___", state 656, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 699, "(1)"
- line 399, "pan.___", state 721, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 723, "(1)"
- line 399, "pan.___", state 724, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 724, "else"
- line 399, "pan.___", state 727, "(1)"
- line 403, "pan.___", state 735, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 737, "(1)"
- line 403, "pan.___", state 738, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 738, "else"
- line 403, "pan.___", state 741, "(1)"
- line 403, "pan.___", state 742, "(1)"
- line 403, "pan.___", state 742, "(1)"
- line 401, "pan.___", state 747, "((i<1))"
- line 401, "pan.___", state 747, "((i>=1))"
- line 408, "pan.___", state 753, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 766, "(1)"
- line 409, "pan.___", state 767, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 767, "else"
- line 409, "pan.___", state 770, "(1)"
- line 409, "pan.___", state 771, "(1)"
- line 409, "pan.___", state 771, "(1)"
- line 413, "pan.___", state 779, "(1)"
- line 413, "pan.___", state 780, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 780, "else"
- line 413, "pan.___", state 783, "(1)"
- line 413, "pan.___", state 784, "(1)"
- line 413, "pan.___", state 784, "(1)"
- line 411, "pan.___", state 789, "((i<1))"
- line 411, "pan.___", state 789, "((i>=1))"
- line 418, "pan.___", state 796, "(1)"
- line 418, "pan.___", state 797, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 797, "else"
- line 418, "pan.___", state 800, "(1)"
- line 418, "pan.___", state 801, "(1)"
- line 418, "pan.___", state 801, "(1)"
- line 420, "pan.___", state 804, "(1)"
- line 420, "pan.___", state 804, "(1)"
- line 356, "pan.___", state 810, "((sighand_exec==1))"
- line 356, "pan.___", state 810, "else"
- line 362, "pan.___", state 813, "sighand_exec = 1"
- line 399, "pan.___", state 826, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 828, "(1)"
- line 399, "pan.___", state 829, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 829, "else"
- line 399, "pan.___", state 832, "(1)"
- line 403, "pan.___", state 840, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 842, "(1)"
- line 403, "pan.___", state 843, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 843, "else"
- line 403, "pan.___", state 846, "(1)"
- line 403, "pan.___", state 847, "(1)"
- line 403, "pan.___", state 847, "(1)"
- line 401, "pan.___", state 852, "((i<1))"
- line 401, "pan.___", state 852, "((i>=1))"
- line 408, "pan.___", state 858, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 871, "(1)"
- line 409, "pan.___", state 872, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 872, "else"
- line 409, "pan.___", state 875, "(1)"
- line 409, "pan.___", state 876, "(1)"
- line 409, "pan.___", state 876, "(1)"
- line 413, "pan.___", state 884, "(1)"
- line 413, "pan.___", state 885, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 885, "else"
- line 413, "pan.___", state 888, "(1)"
- line 413, "pan.___", state 889, "(1)"
- line 413, "pan.___", state 889, "(1)"
- line 411, "pan.___", state 894, "((i<1))"
- line 411, "pan.___", state 894, "((i>=1))"
- line 418, "pan.___", state 901, "(1)"
- line 418, "pan.___", state 902, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 902, "else"
- line 418, "pan.___", state 905, "(1)"
- line 418, "pan.___", state 906, "(1)"
- line 418, "pan.___", state 906, "(1)"
- line 420, "pan.___", state 909, "(1)"
- line 420, "pan.___", state 909, "(1)"
- line 362, "pan.___", state 918, "sighand_exec = 1"
- line 403, "pan.___", state 949, "(1)"
- line 408, "pan.___", state 965, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1008, "(1)"
- line 403, "pan.___", state 1046, "(1)"
- line 408, "pan.___", state 1062, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1105, "(1)"
- line 399, "pan.___", state 1131, "(1)"
- line 403, "pan.___", state 1145, "(1)"
- line 408, "pan.___", state 1161, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1204, "(1)"
- line 403, "pan.___", state 1245, "(1)"
- line 408, "pan.___", state 1261, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 418, "pan.___", state 1304, "(1)"
- line 399, "pan.___", state 1326, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1328, "(1)"
- line 399, "pan.___", state 1329, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1329, "else"
- line 399, "pan.___", state 1332, "(1)"
- line 403, "pan.___", state 1340, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1342, "(1)"
- line 403, "pan.___", state 1343, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1343, "else"
- line 403, "pan.___", state 1346, "(1)"
- line 403, "pan.___", state 1347, "(1)"
- line 403, "pan.___", state 1347, "(1)"
- line 401, "pan.___", state 1352, "((i<1))"
- line 401, "pan.___", state 1352, "((i>=1))"
- line 408, "pan.___", state 1358, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1371, "(1)"
- line 409, "pan.___", state 1372, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1372, "else"
- line 409, "pan.___", state 1375, "(1)"
- line 409, "pan.___", state 1376, "(1)"
- line 409, "pan.___", state 1376, "(1)"
- line 413, "pan.___", state 1384, "(1)"
- line 413, "pan.___", state 1385, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1385, "else"
- line 413, "pan.___", state 1388, "(1)"
- line 413, "pan.___", state 1389, "(1)"
- line 413, "pan.___", state 1389, "(1)"
- line 411, "pan.___", state 1394, "((i<1))"
- line 411, "pan.___", state 1394, "((i>=1))"
- line 418, "pan.___", state 1401, "(1)"
- line 418, "pan.___", state 1402, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1402, "else"
- line 418, "pan.___", state 1405, "(1)"
- line 418, "pan.___", state 1406, "(1)"
- line 418, "pan.___", state 1406, "(1)"
- line 420, "pan.___", state 1409, "(1)"
- line 420, "pan.___", state 1409, "(1)"
- line 356, "pan.___", state 1415, "((sighand_exec==1))"
- line 356, "pan.___", state 1415, "else"
- line 362, "pan.___", state 1418, "sighand_exec = 1"
- line 399, "pan.___", state 1431, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 399, "pan.___", state 1433, "(1)"
- line 399, "pan.___", state 1434, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<0)))"
- line 399, "pan.___", state 1434, "else"
- line 399, "pan.___", state 1437, "(1)"
- line 403, "pan.___", state 1445, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 403, "pan.___", state 1447, "(1)"
- line 403, "pan.___", state 1448, "((cache_dirty_urcu_active_readers.bitfield&(1<<0)))"
- line 403, "pan.___", state 1448, "else"
- line 403, "pan.___", state 1451, "(1)"
- line 403, "pan.___", state 1452, "(1)"
- line 403, "pan.___", state 1452, "(1)"
- line 401, "pan.___", state 1457, "((i<1))"
- line 401, "pan.___", state 1457, "((i>=1))"
- line 408, "pan.___", state 1463, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 409, "pan.___", state 1476, "(1)"
- line 409, "pan.___", state 1477, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<0))))"
- line 409, "pan.___", state 1477, "else"
- line 409, "pan.___", state 1480, "(1)"
- line 409, "pan.___", state 1481, "(1)"
- line 409, "pan.___", state 1481, "(1)"
- line 413, "pan.___", state 1489, "(1)"
- line 413, "pan.___", state 1490, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<0))))"
- line 413, "pan.___", state 1490, "else"
- line 413, "pan.___", state 1493, "(1)"
- line 413, "pan.___", state 1494, "(1)"
- line 413, "pan.___", state 1494, "(1)"
- line 411, "pan.___", state 1499, "((i<1))"
- line 411, "pan.___", state 1499, "((i>=1))"
- line 418, "pan.___", state 1506, "(1)"
- line 418, "pan.___", state 1507, "(!((cache_dirty_generation_ptr.bitfield&(1<<0))))"
- line 418, "pan.___", state 1507, "else"
- line 418, "pan.___", state 1510, "(1)"
- line 418, "pan.___", state 1511, "(1)"
- line 418, "pan.___", state 1511, "(1)"
- line 420, "pan.___", state 1514, "(1)"
- line 420, "pan.___", state 1514, "(1)"
- line 362, "pan.___", state 1523, "sighand_exec = 1"
- line 179, "pan.___", state 1548, "(1)"
- line 183, "pan.___", state 1559, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 160, "pan.___", state 1569, "(1)"
- line 164, "pan.___", state 1577, "(1)"
- line 168, "pan.___", state 1589, "(1)"
- line 175, "pan.___", state 1600, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 179, "pan.___", state 1609, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1622, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1632, "(1)"
- line 164, "pan.___", state 1640, "(1)"
- line 168, "pan.___", state 1652, "(1)"
- line 175, "pan.___", state 1667, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<0)))"
- line 179, "pan.___", state 1676, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<0)))"
- line 183, "pan.___", state 1689, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<0)))"
- line 160, "pan.___", state 1699, "(1)"
- line 164, "pan.___", state 1707, "(1)"
- line 168, "pan.___", state 1719, "(1)"
- line 702, "pan.___", state 1758, "-end-"
- (173 of 1758 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.89 seconds
-pan: rate 103932.58 states/second
-pan: avg transition delay 7.8297e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-2:3:2917
-3:3:2920
-4:3:2920
-5:3:2920
-6:3:2923
-7:3:2931
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-10:3:2934
-11:3:2940
-12:3:2944
-13:3:2944
-14:3:2944
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-16:3:2955
-17:3:2959
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-19:0:2965
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-22:2:1151
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-35:2:1186
-36:2:1191
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-38:2:1196
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+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-Depth= 3212 States= 1e+06 Transitions= 1.17e+07 Memory= 519.572 t= 7.66 R= 1e+05
-Depth= 3212 States= 2e+06 Transitions= 2.38e+07 Memory= 572.990 t= 16 R= 1e+05
-Depth= 3212 States= 3e+06 Transitions= 3.62e+07 Memory= 626.408 t= 24.9 R= 1e+05
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 48 byte, depth reached 3212, errors: 0
- 3539988 states, stored
- 39085459 states, matched
- 42625447 transitions (= stored+matched)
-1.5602888e+08 atomic steps
-hash conflicts: 28971442 (resolved)
-
-Stats on memory usage (in Megabytes):
- 256.576 equivalent memory usage for states (stored*(State-vector + overhead))
- 196.718 actual memory usage for states (compression: 76.67%)
- state-vector as stored = 30 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 686.338 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, ".input.spin", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 61, "(1)"
- line 417, ".input.spin", state 91, "(1)"
- line 398, ".input.spin", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 151, "(1)"
- line 417, ".input.spin", state 181, "(1)"
- line 398, ".input.spin", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 242, "(1)"
- line 417, ".input.spin", state 272, "(1)"
- line 398, ".input.spin", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 360, "(1)"
- line 417, ".input.spin", state 390, "(1)"
- line 539, ".input.spin", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 398, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 59, "(1)"
- line 412, ".input.spin", state 72, "(1)"
- line 417, ".input.spin", state 89, "(1)"
- line 398, ".input.spin", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 153, "(1)"
- line 412, ".input.spin", state 166, "(1)"
- line 651, ".input.spin", state 199, "(1)"
- line 174, ".input.spin", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 240, "(1)"
- line 163, ".input.spin", state 248, "(1)"
- line 167, ".input.spin", state 260, "(1)"
- line 174, ".input.spin", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 303, "(1)"
- line 163, ".input.spin", state 311, "(1)"
- line 167, ".input.spin", state 323, "(1)"
- line 174, ".input.spin", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 370, "(1)"
- line 163, ".input.spin", state 378, "(1)"
- line 167, ".input.spin", state 390, "(1)"
- line 398, ".input.spin", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 449, "(1)"
- line 412, ".input.spin", state 462, "(1)"
- line 417, ".input.spin", state 479, "(1)"
- line 398, ".input.spin", state 498, "(1)"
- line 402, ".input.spin", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 554, "(1)"
- line 417, ".input.spin", state 571, "(1)"
- line 402, ".input.spin", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 647, "(1)"
- line 417, ".input.spin", state 664, "(1)"
- line 178, ".input.spin", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 710, "(1)"
- line 163, ".input.spin", state 718, "(1)"
- line 167, ".input.spin", state 730, "(1)"
- line 174, ".input.spin", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 773, "(1)"
- line 163, ".input.spin", state 781, "(1)"
- line 167, ".input.spin", state 793, "(1)"
- line 174, ".input.spin", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 840, "(1)"
- line 163, ".input.spin", state 848, "(1)"
- line 167, ".input.spin", state 860, "(1)"
- line 398, ".input.spin", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, ".input.spin", state 884, "(1)"
- line 398, ".input.spin", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, ".input.spin", state 885, "else"
- line 398, ".input.spin", state 888, "(1)"
- line 402, ".input.spin", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 898, "(1)"
- line 402, ".input.spin", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, ".input.spin", state 899, "else"
- line 402, ".input.spin", state 902, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 400, ".input.spin", state 908, "((i<1))"
- line 400, ".input.spin", state 908, "((i>=1))"
- line 407, ".input.spin", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 927, "(1)"
- line 408, ".input.spin", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, ".input.spin", state 928, "else"
- line 408, ".input.spin", state 931, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 412, ".input.spin", state 940, "(1)"
- line 412, ".input.spin", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, ".input.spin", state 941, "else"
- line 412, ".input.spin", state 944, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 410, ".input.spin", state 950, "((i<1))"
- line 410, ".input.spin", state 950, "((i>=1))"
- line 417, ".input.spin", state 957, "(1)"
- line 417, ".input.spin", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, ".input.spin", state 958, "else"
- line 417, ".input.spin", state 961, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 402, ".input.spin", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1040, "(1)"
- line 417, ".input.spin", state 1057, "(1)"
- line 402, ".input.spin", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1130, "(1)"
- line 417, ".input.spin", state 1147, "(1)"
- line 398, ".input.spin", state 1166, "(1)"
- line 402, ".input.spin", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1222, "(1)"
- line 417, ".input.spin", state 1239, "(1)"
- line 402, ".input.spin", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1315, "(1)"
- line 417, ".input.spin", state 1332, "(1)"
- line 178, ".input.spin", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1378, "(1)"
- line 163, ".input.spin", state 1386, "(1)"
- line 167, ".input.spin", state 1398, "(1)"
- line 174, ".input.spin", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1441, "(1)"
- line 163, ".input.spin", state 1449, "(1)"
- line 167, ".input.spin", state 1461, "(1)"
- line 174, ".input.spin", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1508, "(1)"
- line 163, ".input.spin", state 1516, "(1)"
- line 167, ".input.spin", state 1528, "(1)"
- line 398, ".input.spin", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, ".input.spin", state 1552, "(1)"
- line 398, ".input.spin", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, ".input.spin", state 1553, "else"
- line 398, ".input.spin", state 1556, "(1)"
- line 402, ".input.spin", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 1566, "(1)"
- line 402, ".input.spin", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, ".input.spin", state 1567, "else"
- line 402, ".input.spin", state 1570, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 400, ".input.spin", state 1576, "((i<1))"
- line 400, ".input.spin", state 1576, "((i>=1))"
- line 407, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 1595, "(1)"
- line 408, ".input.spin", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, ".input.spin", state 1596, "else"
- line 408, ".input.spin", state 1599, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 412, ".input.spin", state 1608, "(1)"
- line 412, ".input.spin", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, ".input.spin", state 1609, "else"
- line 412, ".input.spin", state 1612, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 410, ".input.spin", state 1618, "((i<1))"
- line 410, ".input.spin", state 1618, "((i>=1))"
- line 417, ".input.spin", state 1625, "(1)"
- line 417, ".input.spin", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, ".input.spin", state 1626, "else"
- line 417, ".input.spin", state 1629, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 178, ".input.spin", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1681, "(1)"
- line 163, ".input.spin", state 1689, "(1)"
- line 167, ".input.spin", state 1701, "(1)"
- line 174, ".input.spin", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1744, "(1)"
- line 163, ".input.spin", state 1752, "(1)"
- line 167, ".input.spin", state 1764, "(1)"
- line 174, ".input.spin", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1811, "(1)"
- line 163, ".input.spin", state 1819, "(1)"
- line 167, ".input.spin", state 1831, "(1)"
- line 701, ".input.spin", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 29.8 seconds
-pan: rate 118871.32 states/second
-pan: avg transition delay 6.9864e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-Depth= 3880 States= 1e+06 Transitions= 1.18e+07 Memory= 527.190 t= 9.53 R= 1e+05
-Depth= 3880 States= 2e+06 Transitions= 2.39e+07 Memory= 588.225 t= 19.8 R= 1e+05
-Depth= 3880 States= 3e+06 Transitions= 3.61e+07 Memory= 649.260 t= 30.5 R= 1e+05
-pan: resizing hashtable to -w22.. done
-Depth= 3880 States= 4e+06 Transitions= 4.84e+07 Memory= 741.318 t= 41.1 R= 1e+05
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3880, errors: 0
- 4015564 states, stored
- 44539121 states, matched
- 48554685 transitions (= stored+matched)
-1.7777933e+08 atomic steps
-hash conflicts: 33629695 (resolved)
-
-Stats on memory usage (in Megabytes):
- 321.681 equivalent memory usage for states (stored*(State-vector + overhead))
- 252.629 actual memory usage for states (compression: 78.53%)
- state-vector as stored = 38 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 742.295 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 61, "(1)"
- line 417, "pan.___", state 91, "(1)"
- line 398, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 151, "(1)"
- line 417, "pan.___", state 181, "(1)"
- line 398, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 242, "(1)"
- line 417, "pan.___", state 272, "(1)"
- line 398, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 360, "(1)"
- line 417, "pan.___", state 390, "(1)"
- line 539, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 59, "(1)"
- line 412, "pan.___", state 72, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 153, "(1)"
- line 412, "pan.___", state 166, "(1)"
- line 651, "pan.___", state 199, "(1)"
- line 174, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 240, "(1)"
- line 163, "pan.___", state 248, "(1)"
- line 167, "pan.___", state 260, "(1)"
- line 174, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 303, "(1)"
- line 163, "pan.___", state 311, "(1)"
- line 167, "pan.___", state 323, "(1)"
- line 174, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 370, "(1)"
- line 163, "pan.___", state 378, "(1)"
- line 167, "pan.___", state 390, "(1)"
- line 398, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 449, "(1)"
- line 412, "pan.___", state 462, "(1)"
- line 417, "pan.___", state 479, "(1)"
- line 398, "pan.___", state 498, "(1)"
- line 402, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 554, "(1)"
- line 417, "pan.___", state 571, "(1)"
- line 402, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 647, "(1)"
- line 417, "pan.___", state 664, "(1)"
- line 178, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 710, "(1)"
- line 163, "pan.___", state 718, "(1)"
- line 167, "pan.___", state 730, "(1)"
- line 174, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 773, "(1)"
- line 163, "pan.___", state 781, "(1)"
- line 167, "pan.___", state 793, "(1)"
- line 174, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 840, "(1)"
- line 163, "pan.___", state 848, "(1)"
- line 167, "pan.___", state 860, "(1)"
- line 398, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, "pan.___", state 884, "(1)"
- line 398, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, "pan.___", state 885, "else"
- line 398, "pan.___", state 888, "(1)"
- line 402, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, "pan.___", state 899, "else"
- line 402, "pan.___", state 902, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 400, "pan.___", state 908, "((i<1))"
- line 400, "pan.___", state 908, "((i>=1))"
- line 407, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 927, "(1)"
- line 408, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, "pan.___", state 928, "else"
- line 408, "pan.___", state 931, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 412, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, "pan.___", state 941, "else"
- line 412, "pan.___", state 944, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 410, "pan.___", state 950, "((i<1))"
- line 410, "pan.___", state 950, "((i>=1))"
- line 417, "pan.___", state 957, "(1)"
- line 417, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, "pan.___", state 958, "else"
- line 417, "pan.___", state 961, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 402, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1040, "(1)"
- line 417, "pan.___", state 1057, "(1)"
- line 402, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1130, "(1)"
- line 417, "pan.___", state 1147, "(1)"
- line 398, "pan.___", state 1166, "(1)"
- line 402, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1222, "(1)"
- line 417, "pan.___", state 1239, "(1)"
- line 402, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1315, "(1)"
- line 417, "pan.___", state 1332, "(1)"
- line 178, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1378, "(1)"
- line 163, "pan.___", state 1386, "(1)"
- line 167, "pan.___", state 1398, "(1)"
- line 174, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1441, "(1)"
- line 163, "pan.___", state 1449, "(1)"
- line 167, "pan.___", state 1461, "(1)"
- line 174, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1508, "(1)"
- line 163, "pan.___", state 1516, "(1)"
- line 167, "pan.___", state 1528, "(1)"
- line 398, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, "pan.___", state 1552, "(1)"
- line 398, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, "pan.___", state 1553, "else"
- line 398, "pan.___", state 1556, "(1)"
- line 402, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 1566, "(1)"
- line 402, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, "pan.___", state 1567, "else"
- line 402, "pan.___", state 1570, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 400, "pan.___", state 1576, "((i<1))"
- line 400, "pan.___", state 1576, "((i>=1))"
- line 407, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1595, "(1)"
- line 408, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, "pan.___", state 1596, "else"
- line 408, "pan.___", state 1599, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 412, "pan.___", state 1608, "(1)"
- line 412, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, "pan.___", state 1609, "else"
- line 412, "pan.___", state 1612, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 410, "pan.___", state 1618, "((i<1))"
- line 410, "pan.___", state 1618, "((i>=1))"
- line 417, "pan.___", state 1625, "(1)"
- line 417, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, "pan.___", state 1626, "else"
- line 417, "pan.___", state 1629, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 178, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1681, "(1)"
- line 163, "pan.___", state 1689, "(1)"
- line 167, "pan.___", state 1701, "(1)"
- line 174, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1744, "(1)"
- line 163, "pan.___", state 1752, "(1)"
- line 167, "pan.___", state 1764, "(1)"
- line 174, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1811, "(1)"
- line 163, "pan.___", state 1819, "(1)"
- line 167, "pan.___", state 1831, "(1)"
- line 701, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 41.3 seconds
-pan: rate 97205.616 states/second
-pan: avg transition delay 8.5079e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-Depth= 11386 States= 1e+06 Transitions= 1.56e+07 Memory= 527.287 t= 12.8 R= 8e+04
-pan: claim violated! (at depth 2146)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 72 byte, depth reached 11386, errors: 1
- 1223588 states, stored
- 17987399 states, matched
- 19210987 transitions (= stored+matched)
- 70012127 atomic steps
-hash conflicts: 4173157 (resolved)
-
-Stats on memory usage (in Megabytes):
- 116.690 equivalent memory usage for states (stored*(State-vector + overhead))
- 75.177 actual memory usage for states (compression: 64.42%)
- state-vector as stored = 36 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 540.861 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 151, "(1)"
- line 419, "pan.___", state 181, "(1)"
- line 400, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 242, "(1)"
- line 419, "pan.___", state 272, "(1)"
- line 400, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 331, "(1)"
- line 409, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 360, "(1)"
- line 419, "pan.___", state 390, "(1)"
- line 541, "pan.___", state 414, "-end-"
- (18 of 414 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 410, "pan.___", state 153, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 400, "pan.___", state 209, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 223, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 254, "(1)"
- line 414, "pan.___", state 267, "(1)"
- line 400, "pan.___", state 300, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 314, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 345, "(1)"
- line 414, "pan.___", state 358, "(1)"
- line 400, "pan.___", state 395, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 409, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 440, "(1)"
- line 414, "pan.___", state 453, "(1)"
- line 400, "pan.___", state 488, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 533, "(1)"
- line 414, "pan.___", state 546, "(1)"
- line 400, "pan.___", state 582, "(1)"
- line 404, "pan.___", state 594, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 638, "(1)"
- line 404, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 731, "(1)"
- line 404, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 821, "(1)"
- line 419, "pan.___", state 838, "(1)"
- line 404, "pan.___", state 868, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 886, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 912, "(1)"
- line 419, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 963, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 981, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1007, "(1)"
- line 419, "pan.___", state 1024, "(1)"
- line 400, "pan.___", state 1050, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1053, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1053, "else"
- line 400, "pan.___", state 1056, "(1)"
- line 404, "pan.___", state 1064, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1066, "(1)"
- line 404, "pan.___", state 1067, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1067, "else"
- line 404, "pan.___", state 1070, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 402, "pan.___", state 1076, "((i<1))"
- line 402, "pan.___", state 1076, "((i>=1))"
- line 409, "pan.___", state 1082, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1095, "(1)"
- line 410, "pan.___", state 1096, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1096, "else"
- line 410, "pan.___", state 1099, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 414, "pan.___", state 1108, "(1)"
- line 414, "pan.___", state 1109, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1109, "else"
- line 414, "pan.___", state 1112, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 412, "pan.___", state 1118, "((i<1))"
- line 412, "pan.___", state 1118, "((i>=1))"
- line 419, "pan.___", state 1125, "(1)"
- line 419, "pan.___", state 1126, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1126, "else"
- line 419, "pan.___", state 1129, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 404, "pan.___", state 1164, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1208, "(1)"
- line 404, "pan.___", state 1254, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1298, "(1)"
- line 400, "pan.___", state 1334, "(1)"
- line 404, "pan.___", state 1346, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1390, "(1)"
- line 404, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1483, "(1)"
- line 404, "pan.___", state 1529, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1547, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1573, "(1)"
- line 419, "pan.___", state 1590, "(1)"
- line 404, "pan.___", state 1620, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1638, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1664, "(1)"
- line 419, "pan.___", state 1681, "(1)"
- line 404, "pan.___", state 1715, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1733, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1759, "(1)"
- line 419, "pan.___", state 1776, "(1)"
- line 400, "pan.___", state 1802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1804, "(1)"
- line 400, "pan.___", state 1805, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1805, "else"
- line 400, "pan.___", state 1808, "(1)"
- line 404, "pan.___", state 1816, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1818, "(1)"
- line 404, "pan.___", state 1819, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1819, "else"
- line 404, "pan.___", state 1822, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 402, "pan.___", state 1828, "((i<1))"
- line 402, "pan.___", state 1828, "((i>=1))"
- line 409, "pan.___", state 1834, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1847, "(1)"
- line 410, "pan.___", state 1848, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1848, "else"
- line 410, "pan.___", state 1851, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 414, "pan.___", state 1860, "(1)"
- line 414, "pan.___", state 1861, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1861, "else"
- line 414, "pan.___", state 1864, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 412, "pan.___", state 1870, "((i<1))"
- line 412, "pan.___", state 1870, "((i>=1))"
- line 419, "pan.___", state 1877, "(1)"
- line 419, "pan.___", state 1878, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1878, "else"
- line 419, "pan.___", state 1881, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 404, "pan.___", state 1916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1960, "(1)"
- line 404, "pan.___", state 2007, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2051, "(1)"
- line 404, "pan.___", state 2102, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2146, "(1)"
- line 703, "pan.___", state 2192, "-end-"
- (144 of 2192 states)
-unreached in proctype :init:
- line 710, "pan.___", state 9, "((j<2))"
- line 710, "pan.___", state 9, "((j>=2))"
- line 711, "pan.___", state 20, "((j<2))"
- line 711, "pan.___", state 20, "((j>=2))"
- line 716, "pan.___", state 33, "((j<2))"
- line 716, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 15.9 seconds
-pan: rate 77100.693 states/second
-pan: avg transition delay 8.2609e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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-1976:1:87
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-1986:2:2599
-1987:0:2654
-1988:1:102
-1989:1:106
-1990:1:107
-1991:1:115
-1992:1:116
-1993:1:120
-1994:1:121
-1995:1:129
-1996:1:134
-1997:1:138
-1998:1:139
-1999:1:146
-2000:1:147
-2001:1:158
-2002:1:159
-2003:1:160
-2004:1:171
-2005:1:176
-2006:1:177
-2007:0:2654
-2008:2:2600
-2009:0:2654
-2010:1:189
-2011:0:2654
-2012:2:2599
-2013:0:2654
-2014:1:191
-2015:0:2654
-2016:2:2600
-2017:0:2654
-2018:1:192
-2019:0:2654
-2020:2:2599
-2021:0:2654
-2022:1:193
-2023:1:197
-2024:1:198
-2025:1:206
-2026:1:207
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-2028:1:212
-2029:1:220
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+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-Depth= 5439 States= 1e+06 Transitions= 1.03e+07 Memory= 527.190 t= 8.16 R= 1e+05
-pan: claim violated! (at depth 1801)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 5439, errors: 1
- 1006552 states, stored
- 9396280 states, matched
- 10402832 transitions (= stored+matched)
- 36844262 atomic steps
-hash conflicts: 1832712 (resolved)
-
-Stats on memory usage (in Megabytes):
- 80.634 equivalent memory usage for states (stored*(State-vector + overhead))
- 61.871 actual memory usage for states (compression: 76.73%)
- state-vector as stored = 36 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 527.580 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 243, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 265, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 291, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 304, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 320, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 334, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 352, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 365, "(1)"
- line 413, "pan.___", state 378, "(1)"
- line 418, "pan.___", state 395, "(1)"
- line 399, "pan.___", state 414, "(1)"
- line 403, "pan.___", state 426, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 444, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 487, "(1)"
- line 403, "pan.___", state 519, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 537, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 563, "(1)"
- line 418, "pan.___", state 580, "(1)"
- line 179, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 629, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 651, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 677, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 690, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 714, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 716, "(1)"
- line 399, "pan.___", state 717, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 717, "else"
- line 399, "pan.___", state 720, "(1)"
- line 403, "pan.___", state 728, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 730, "(1)"
- line 403, "pan.___", state 731, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 731, "else"
- line 403, "pan.___", state 734, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 401, "pan.___", state 740, "((i<1))"
- line 401, "pan.___", state 740, "((i>=1))"
- line 408, "pan.___", state 746, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 759, "(1)"
- line 409, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 760, "else"
- line 409, "pan.___", state 763, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 413, "pan.___", state 772, "(1)"
- line 413, "pan.___", state 773, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 773, "else"
- line 413, "pan.___", state 776, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 411, "pan.___", state 782, "((i<1))"
- line 411, "pan.___", state 782, "((i>=1))"
- line 418, "pan.___", state 789, "(1)"
- line 418, "pan.___", state 790, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 790, "else"
- line 418, "pan.___", state 793, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 403, "pan.___", state 828, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 846, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 872, "(1)"
- line 418, "pan.___", state 889, "(1)"
- line 403, "pan.___", state 918, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 936, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 979, "(1)"
- line 399, "pan.___", state 998, "(1)"
- line 403, "pan.___", state 1010, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1028, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1054, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 403, "pan.___", state 1103, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1121, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1147, "(1)"
- line 418, "pan.___", state 1164, "(1)"
- line 179, "pan.___", state 1187, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1200, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 1213, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1235, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1252, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1261, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1300, "(1)"
- line 399, "pan.___", state 1301, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1301, "else"
- line 399, "pan.___", state 1304, "(1)"
- line 403, "pan.___", state 1312, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1314, "(1)"
- line 403, "pan.___", state 1315, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1315, "else"
- line 403, "pan.___", state 1318, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 401, "pan.___", state 1324, "((i<1))"
- line 401, "pan.___", state 1324, "((i>=1))"
- line 408, "pan.___", state 1330, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1343, "(1)"
- line 409, "pan.___", state 1344, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1344, "else"
- line 409, "pan.___", state 1347, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 413, "pan.___", state 1356, "(1)"
- line 413, "pan.___", state 1357, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1357, "else"
- line 413, "pan.___", state 1360, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 411, "pan.___", state 1366, "((i<1))"
- line 411, "pan.___", state 1366, "((i>=1))"
- line 418, "pan.___", state 1373, "(1)"
- line 418, "pan.___", state 1374, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1374, "else"
- line 418, "pan.___", state 1377, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 179, "pan.___", state 1406, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1419, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 1432, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1454, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1471, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1480, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1493, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 702, "pan.___", state 1520, "-end-"
- (144 of 1520 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 8.24 seconds
-pan: rate 122154.37 states/second
-pan: avg transition delay 7.9209e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-2:3:1934
-3:3:1937
-4:3:1937
-5:3:1940
-6:3:1948
-7:3:1948
-8:3:1951
-9:3:1957
-10:3:1961
-11:3:1961
-12:3:1964
-13:3:1972
-14:3:1976
-15:3:1977
-16:0:1982
-17:3:1979
-18:0:1982
-19:2:416
-20:0:1982
-21:2:422
-22:0:1982
-23:2:423
-24:0:1982
-25:2:424
-26:2:428
-27:2:429
-28:2:437
-29:2:438
-30:2:442
-31:2:443
-32:2:451
-33:2:456
-34:2:460
-35:2:461
-36:2:468
-37:2:469
-38:2:480
-39:2:481
-40:2:482
-41:2:493
-42:2:498
-43:2:499
-44:0:1982
-45:2:511
-46:0:1982
-47:2:513
-48:2:514
-49:0:1982
-50:2:518
-51:2:522
-52:2:523
-53:2:531
-54:2:532
-55:2:536
-56:2:537
-57:2:545
-58:2:550
-59:2:551
-60:2:562
-61:2:563
-62:2:574
-63:2:575
-64:2:576
-65:2:587
-66:2:592
-67:2:593
-68:0:1982
-69:2:605
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-84:2:645
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-94:2:679
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-205:2:1261
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-224:2:1332
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-245:2:1419
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-247:2:1424
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-249:2:1433
-250:2:1438
-251:2:1442
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-277:2:1517
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-279:2:1526
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-281:2:1535
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-283:2:1543
-284:2:1544
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-286:2:1556
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-419:2:706
-420:2:710
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-422:2:719
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-435:2:757
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-438:2:767
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-440:2:775
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-483:2:920
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-489:2:947
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-1658:1:160
-1659:1:171
-1660:1:183
-1661:1:184
-1662:0:1982
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-1664:0:1982
-1665:1:189
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-1680:1:206
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-1684:1:220
-1685:1:225
-1686:1:229
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-1688:1:237
-1689:1:238
-1690:1:249
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-1692:1:251
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-1694:1:274
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-1696:0:1982
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-1698:0:1982
-1699:1:280
-1700:0:1982
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-1739:0:1982
-1740:1:99
-1741:0:1982
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-1744:1:101
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-1755:1:129
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-1769:0:1982
-1770:1:189
-1771:0:1982
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-1773:0:1982
-1774:1:285
-1775:0:1982
-1776:2:1928
-1777:0:1982
-1778:1:286
-1779:0:1982
-1780:2:1927
-1781:0:1982
-1782:1:291
-1783:0:1982
-1784:2:1928
-1785:0:1982
-1786:1:293
-1787:0:1982
-1788:2:1927
-1789:0:1982
-1790:1:296
-1791:0:1982
-1792:2:1928
-1793:0:1982
-1794:1:301
-1795:0:1982
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-1798:1:302
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-1800:2:1928
-1801:0:1986
-1802:1:124
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1882)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4174, errors: 1
- 367189 states, stored
- 3431533 states, matched
- 3798722 transitions (= stored+matched)
- 13407384 atomic steps
-hash conflicts: 253700 (resolved)
-
-Stats on memory usage (in Megabytes):
- 29.415 equivalent memory usage for states (stored*(State-vector + overhead))
- 22.811 actual memory usage for states (compression: 77.55%)
- state-vector as stored = 37 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 488.518 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 331, "(1)"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (18 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 401, "pan.___", state 134, "((i<1))"
- line 401, "pan.___", state 134, "((i>=1))"
- line 409, "pan.___", state 153, "(1)"
- line 409, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 154, "else"
- line 409, "pan.___", state 157, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 413, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 167, "else"
- line 413, "pan.___", state 170, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 411, "pan.___", state 176, "((i<1))"
- line 411, "pan.___", state 176, "((i>=1))"
- line 418, "pan.___", state 183, "(1)"
- line 418, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 184, "else"
- line 418, "pan.___", state 187, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 369, "pan.___", state 193, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 646, "pan.___", state 202, "((write_lock==0))"
- line 646, "pan.___", state 202, "else"
- line 644, "pan.___", state 203, "(1)"
- line 160, "pan.___", state 209, "(1)"
- line 164, "pan.___", state 217, "(1)"
- line 164, "pan.___", state 218, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 164, "pan.___", state 218, "else"
- line 162, "pan.___", state 223, "((j<1))"
- line 162, "pan.___", state 223, "((j>=1))"
- line 168, "pan.___", state 229, "(1)"
- line 168, "pan.___", state 230, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 168, "pan.___", state 230, "else"
- line 160, "pan.___", state 241, "(1)"
- line 168, "pan.___", state 261, "(1)"
- line 160, "pan.___", state 277, "(1)"
- line 164, "pan.___", state 285, "(1)"
- line 168, "pan.___", state 297, "(1)"
- line 399, "pan.___", state 311, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 325, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 343, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 356, "(1)"
- line 413, "pan.___", state 369, "(1)"
- line 418, "pan.___", state 386, "(1)"
- line 399, "pan.___", state 405, "(1)"
- line 403, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 461, "(1)"
- line 418, "pan.___", state 478, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 164, "pan.___", state 594, "(1)"
- line 168, "pan.___", state 606, "(1)"
- line 160, "pan.___", state 618, "(1)"
- line 168, "pan.___", state 638, "(1)"
- line 164, "pan.___", state 662, "(1)"
- line 168, "pan.___", state 674, "(1)"
- line 399, "pan.___", state 696, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 698, "(1)"
- line 399, "pan.___", state 699, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 699, "else"
- line 399, "pan.___", state 702, "(1)"
- line 403, "pan.___", state 710, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 712, "(1)"
- line 403, "pan.___", state 713, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 713, "else"
- line 403, "pan.___", state 716, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 401, "pan.___", state 722, "((i<1))"
- line 401, "pan.___", state 722, "((i>=1))"
- line 408, "pan.___", state 728, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 741, "(1)"
- line 409, "pan.___", state 742, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 742, "else"
- line 409, "pan.___", state 745, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 413, "pan.___", state 754, "(1)"
- line 413, "pan.___", state 755, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 755, "else"
- line 413, "pan.___", state 758, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 411, "pan.___", state 764, "((i<1))"
- line 411, "pan.___", state 764, "((i>=1))"
- line 418, "pan.___", state 771, "(1)"
- line 418, "pan.___", state 772, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 772, "else"
- line 418, "pan.___", state 775, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 403, "pan.___", state 810, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 828, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 854, "(1)"
- line 418, "pan.___", state 871, "(1)"
- line 403, "pan.___", state 900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 918, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 944, "(1)"
- line 418, "pan.___", state 961, "(1)"
- line 399, "pan.___", state 980, "(1)"
- line 403, "pan.___", state 992, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1010, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1036, "(1)"
- line 418, "pan.___", state 1053, "(1)"
- line 403, "pan.___", state 1085, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1103, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1129, "(1)"
- line 418, "pan.___", state 1146, "(1)"
- line 164, "pan.___", state 1169, "(1)"
- line 168, "pan.___", state 1181, "(1)"
- line 160, "pan.___", state 1193, "(1)"
- line 168, "pan.___", state 1213, "(1)"
- line 164, "pan.___", state 1237, "(1)"
- line 168, "pan.___", state 1249, "(1)"
- line 399, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1273, "(1)"
- line 399, "pan.___", state 1274, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1274, "else"
- line 399, "pan.___", state 1277, "(1)"
- line 403, "pan.___", state 1285, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1287, "(1)"
- line 403, "pan.___", state 1288, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1288, "else"
- line 403, "pan.___", state 1291, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 401, "pan.___", state 1297, "((i<1))"
- line 401, "pan.___", state 1297, "((i>=1))"
- line 408, "pan.___", state 1303, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1316, "(1)"
- line 409, "pan.___", state 1317, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1317, "else"
- line 409, "pan.___", state 1320, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 413, "pan.___", state 1329, "(1)"
- line 413, "pan.___", state 1330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1330, "else"
- line 413, "pan.___", state 1333, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 411, "pan.___", state 1339, "((i<1))"
- line 411, "pan.___", state 1339, "((i>=1))"
- line 418, "pan.___", state 1346, "(1)"
- line 418, "pan.___", state 1347, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1347, "else"
- line 418, "pan.___", state 1350, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 164, "pan.___", state 1379, "(1)"
- line 168, "pan.___", state 1391, "(1)"
- line 160, "pan.___", state 1403, "(1)"
- line 168, "pan.___", state 1423, "(1)"
- line 164, "pan.___", state 1447, "(1)"
- line 168, "pan.___", state 1459, "(1)"
- line 702, "pan.___", state 1484, "-end-"
- (160 of 1484 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 2.96 seconds
-pan: rate 124050.34 states/second
-pan: avg transition delay 7.7921e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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-1736:0:1946
-1737:2:1200
-1738:0:1946
-1739:2:1206
-1740:2:1210
-1741:2:1211
-1742:2:1219
-1743:2:1220
-1744:2:1224
-1745:2:1225
-1746:2:1233
-1747:2:1238
-1748:2:1242
-1749:2:1243
-1750:2:1250
-1751:2:1251
-1752:2:1262
-1753:2:1263
-1754:2:1264
-1755:2:1275
-1756:2:1280
-1757:2:1281
-1758:0:1946
-1759:2:1293
-1760:0:1946
-1761:2:1295
-1762:0:1946
-1763:2:1296
-1764:2:1300
-1765:2:1301
-1766:2:1309
-1767:2:1310
-1768:2:1314
-1769:2:1315
-1770:2:1323
-1771:2:1328
-1772:2:1332
-1773:2:1333
-1774:2:1340
-1775:2:1341
-1776:2:1352
-1777:2:1353
-1778:2:1354
-1779:2:1365
-1780:2:1370
-1781:2:1371
-1782:0:1946
-1783:2:1383
-1784:0:1946
-1785:2:1385
-1786:0:1946
-1787:2:1388
-1788:2:1389
-1789:2:1401
-1790:2:1402
-1791:2:1406
-1792:2:1407
-1793:2:1415
-1794:2:1420
-1795:2:1424
-1796:2:1425
-1797:2:1432
-1798:2:1433
-1799:2:1444
-1800:2:1445
-1801:2:1446
-1802:2:1457
-1803:2:1462
-1804:2:1463
-1805:0:1946
-1806:2:1475
-1807:0:1946
-1808:2:1477
-1809:0:1946
-1810:2:1478
-1811:0:1946
-1812:2:1479
-1813:0:1946
-1814:2:1480
-1815:0:1946
-1816:2:1481
-1817:2:1485
-1818:2:1486
-1819:2:1494
-1820:2:1495
-1821:2:1499
-1822:2:1500
-1823:2:1508
-1824:2:1513
-1825:2:1517
-1826:2:1518
-1827:2:1525
-1828:2:1526
-1829:2:1537
-1830:2:1538
-1831:2:1539
-1832:2:1550
-1833:2:1555
-1834:2:1556
-1835:0:1946
-1836:2:1568
-1837:0:1946
-1838:2:1672
-1839:0:1946
-1840:2:1770
-1841:0:1946
-1842:2:1771
-1843:0:1946
-1844:2:1775
-1845:0:1946
-1846:2:1781
-1847:2:1788
-1848:2:1789
-1849:2:1796
-1850:2:1801
-1851:0:1946
-1852:2:1812
-1853:0:1946
-1854:2:1813
-1855:2:1820
-1856:2:1823
-1857:2:1824
-1858:2:1828
-1859:2:1833
-1860:0:1946
-1861:2:1844
-1862:0:1946
-1863:2:1849
-1864:2:1856
-1865:2:1857
-1866:2:1864
-1867:2:1869
-1868:0:1946
-1869:2:1880
-1870:0:1946
-1871:2:1882
-1872:0:1946
-1873:2:1883
-1874:0:1946
-1875:2:1886
-1876:0:1946
-1877:2:1891
-1878:0:1946
-1879:1:302
-1880:0:1944
-1881:2:1892
-1882:0:1950
-1883:1:143
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1371)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3387, errors: 1
- 206295 states, stored
- 1902753 states, matched
- 2109048 transitions (= stored+matched)
- 7663223 atomic steps
-hash conflicts: 101109 (resolved)
-
-Stats on memory usage (in Megabytes):
- 16.526 equivalent memory usage for states (stored*(State-vector + overhead))
- 13.080 actual memory usage for states (compression: 79.15%)
- state-vector as stored = 38 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 478.752 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 179, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1003, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1013, "(1)"
- line 164, "pan.___", state 1021, "(1)"
- line 168, "pan.___", state 1033, "(1)"
- line 175, "pan.___", state 1044, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1066, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1076, "(1)"
- line 164, "pan.___", state 1084, "(1)"
- line 168, "pan.___", state 1096, "(1)"
- line 175, "pan.___", state 1111, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1133, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1143, "(1)"
- line 164, "pan.___", state 1151, "(1)"
- line 168, "pan.___", state 1163, "(1)"
- line 702, "pan.___", state 1188, "-end-"
- (100 of 1188 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.66 seconds
-pan: rate 124274.1 states/second
-pan: avg transition delay 7.8708e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-4:3:1605
-5:3:1608
-6:3:1616
-7:3:1616
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-9:3:1625
-10:3:1629
-11:3:1629
-12:3:1632
-13:3:1640
-14:3:1644
-15:3:1645
-16:0:1650
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-18:0:1650
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-29:2:438
-30:2:442
-31:2:443
-32:2:451
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-42:2:498
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-50:2:518
-51:2:522
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-212:2:1400
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-266:2:429
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-274:2:461
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-277:2:480
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-279:2:482
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-293:2:532
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-295:2:537
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-351:2:761
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-1276:2:996
-1277:0:1650
-1278:2:997
-1279:0:1650
-1280:2:998
-1281:0:1650
-1282:2:999
-1283:2:1003
-1284:2:1004
-1285:2:1012
-1286:2:1013
-1287:2:1017
-1288:2:1018
-1289:2:1026
-1290:2:1031
-1291:2:1035
-1292:2:1036
-1293:2:1043
-1294:2:1044
-1295:2:1055
-1296:2:1056
-1297:2:1057
-1298:2:1068
-1299:2:1073
-1300:2:1074
-1301:0:1650
-1302:2:1086
-1303:0:1650
-1304:2:1283
-1305:0:1650
-1306:2:1381
-1307:0:1650
-1308:2:1382
-1309:0:1650
-1310:2:1386
-1311:0:1650
-1312:2:1395
-1313:2:1396
-1314:2:1400
-1315:2:1404
-1316:2:1405
-1317:2:1409
-1318:2:1417
-1319:2:1418
-1320:2:1423
-1321:2:1430
-1322:2:1431
-1323:2:1438
-1324:2:1443
-1325:0:1650
-1326:2:1454
-1327:0:1650
-1328:2:1458
-1329:2:1459
-1330:2:1463
-1331:2:1467
-1332:2:1468
-1333:2:1472
-1334:2:1480
-1335:2:1481
-1336:2:1486
-1337:2:1493
-1338:2:1494
-1339:2:1501
-1340:2:1506
-1341:0:1650
-1342:2:1517
-1343:0:1650
-1344:2:1525
-1345:2:1526
-1346:2:1530
-1347:2:1534
-1348:2:1535
-1349:2:1539
-1350:2:1547
-1351:2:1548
-1352:2:1553
-1353:2:1560
-1354:2:1561
-1355:2:1568
-1356:2:1573
-1357:0:1650
-1358:2:1584
-1359:0:1650
-1360:2:1586
-1361:0:1650
-1362:2:1587
-1363:0:1650
-1364:2:1590
-1365:0:1650
-1366:2:1595
-1367:0:1650
-1368:1:302
-1369:0:1648
-1370:2:1596
-1371:0:1654
-1372:0:1650
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1767: Claim reached state 9 (line 748)
-Depth= 3880 States= 1e+06 Transitions= 1.71e+07 Memory= 499.651 t= 14.5 R= 7e+04
-Depth= 3880 States= 2e+06 Transitions= 3.79e+07 Memory= 532.365 t= 32.3 R= 6e+04
-Depth= 3880 States= 3e+06 Transitions= 5.83e+07 Memory= 564.983 t= 50.2 R= 6e+04
-pan: resizing hashtable to -w22.. done
-Depth= 3880 States= 4e+06 Transitions= 7.76e+07 Memory= 629.307 t= 67 R= 6e+04
-Depth= 3880 States= 5e+06 Transitions= 9.78e+07 Memory= 662.315 t= 84.2 R= 6e+04
-Depth= 3880 States= 6e+06 Transitions= 1.19e+08 Memory= 694.736 t= 102 R= 6e+04
-Depth= 3880 States= 7e+06 Transitions= 1.38e+08 Memory= 727.842 t= 119 R= 6e+04
-Depth= 3880 States= 8e+06 Transitions= 1.59e+08 Memory= 760.752 t= 137 R= 6e+04
-Depth= 3880 States= 9e+06 Transitions= 1.79e+08 Memory= 793.174 t= 155 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 3880 States= 1e+07 Transitions= 1.98e+08 Memory= 950.568 t= 172 R= 6e+04
-Depth= 3880 States= 1.1e+07 Transitions= 2.19e+08 Memory= 983.479 t= 189 R= 6e+04
-Depth= 3880 States= 1.2e+07 Transitions= 2.4e+08 Memory= 1015.901 t= 207 R= 6e+04
-Depth= 3880 States= 1.3e+07 Transitions= 2.58e+08 Memory= 1049.397 t= 223 R= 6e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3880, errors: 0
- 7197860 states, stored (1.33457e+07 visited)
-2.5266654e+08 states, matched
-2.6601223e+08 transitions (= visited+matched)
-9.9067284e+08 atomic steps
-hash conflicts: 87783920 (resolved)
-
-Stats on memory usage (in Megabytes):
- 576.611 equivalent memory usage for states (stored*(State-vector + overhead))
- 474.839 actual memory usage for states (compression: 82.35%)
- state-vector as stored = 41 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1060.529 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 230 seconds
-pan: rate 58151.15 states/second
-pan: avg transition delay 8.6274e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4401
-2:4:4353
-3:4:4356
-4:4:4356
-5:4:4359
-6:4:4367
-7:4:4367
-8:4:4370
-9:4:4376
-10:4:4380
-11:4:4380
-12:4:4383
-13:4:4391
-14:4:4395
-15:4:4396
-16:0:4401
-17:4:4398
-18:0:4401
-19:3:2479
-20:0:4401
-21:3:2485
-22:0:4401
-23:3:2486
-24:0:4401
-25:3:2487
-26:3:2491
-27:3:2492
-28:3:2500
-29:3:2501
-30:3:2505
-31:3:2506
-32:3:2514
-33:3:2519
-34:3:2523
-35:3:2524
-36:3:2531
-37:3:2532
-38:3:2543
-39:3:2544
-40:3:2545
-41:3:2556
-42:3:2561
-43:3:2562
-44:0:4401
-45:3:2574
-46:0:4401
-47:3:2576
-48:3:2577
-49:0:4401
-50:3:2581
-51:3:2585
-52:3:2586
-53:3:2594
-54:3:2595
-55:3:2599
-56:3:2600
-57:3:2608
-58:3:2613
-59:3:2614
-60:3:2625
-61:3:2626
-62:3:2637
-63:3:2638
-64:3:2639
-65:3:2650
-66:3:2655
-67:3:2656
-68:0:4401
-69:3:2668
-70:0:4401
-71:3:2670
-72:0:4401
-73:3:2671
-74:0:4401
-75:3:2681
-76:0:4401
-77:3:2682
-78:0:4401
-79:3:2686
-80:3:2687
-81:3:2691
-82:3:2695
-83:3:2696
-84:3:2700
-85:3:2708
-86:3:2709
-87:3:2714
-88:3:2721
-89:3:2722
-90:3:2729
-91:3:2734
-92:0:4401
-93:3:2745
-94:0:4401
-95:3:2749
-96:3:2750
-97:3:2754
-98:3:2758
-99:3:2759
-100:3:2763
-101:3:2771
-102:3:2772
-103:3:2777
-104:3:2784
-105:3:2785
-106:3:2792
-107:3:2797
-108:0:4401
-109:3:2808
-110:0:4401
-111:3:2816
-112:3:2817
-113:3:2821
-114:3:2825
-115:3:2826
-116:3:2830
-117:3:2838
-118:3:2839
-119:3:2844
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-1015:3:4128
-1016:0:4401
-1017:3:4132
-1018:0:4401
-1019:3:4138
-1020:0:4401
-1021:3:4142
-1022:3:4143
-1023:3:4147
-1024:3:4151
-1025:3:4152
-1026:3:4156
-1027:3:4164
-1028:3:4165
-1029:3:4170
-1030:3:4177
-1031:3:4178
-1032:3:4185
-1033:3:4190
-1034:0:4401
-1035:3:4201
-1036:0:4401
-1037:3:4205
-1038:3:4206
-1039:3:4210
-1040:3:4214
-1041:3:4215
-1042:3:4219
-1043:3:4227
-1044:3:4228
-1045:3:4233
-1046:3:4240
-1047:3:4241
-1048:3:4248
-1049:3:4253
-1050:0:4401
-1051:3:4264
-1052:0:4401
-1053:3:4272
-1054:3:4273
-1055:3:4277
-1056:3:4281
-1057:3:4282
-1058:3:4286
-1059:3:4294
-1060:3:4295
-1061:3:4300
-1062:3:4307
-1063:3:4308
-1064:3:4315
-1065:3:4320
-1066:0:4401
-1067:3:4335
-1068:0:4401
-1069:3:4337
-1070:0:4401
-1071:3:4338
-1072:0:4401
-1073:3:4341
-1074:0:4401
-1075:3:4346
-1076:0:4401
-1077:2:1236
-1078:0:4401
-1079:3:4347
-1080:0:4401
-1081:2:1242
-1082:0:4401
-1083:3:4346
-1084:0:4401
-1085:2:1243
-1086:0:4401
-1087:3:4347
-1088:0:4401
-1089:2:1244
-1090:0:4401
-1091:3:4346
-1092:0:4401
-1093:2:1245
-1094:0:4401
-1095:3:4347
-1096:0:4401
-1097:1:2
-1098:0:4401
-1099:3:4346
-1100:0:4401
-1101:2:1246
-1102:0:4401
-1103:3:4347
-1104:0:4401
-1105:1:8
-1106:0:4401
-1107:3:4346
-1108:0:4401
-1109:2:1245
-1110:0:4401
-1111:3:4347
-1112:0:4401
-1113:1:9
-1114:0:4401
-1115:3:4346
-1116:0:4401
-1117:2:1246
-1118:0:4401
-1119:3:4347
-1120:0:4401
-1121:1:10
-1122:0:4401
-1123:3:4346
-1124:0:4401
-1125:2:1245
-1126:0:4401
-1127:3:4347
-1128:0:4401
-1129:1:11
-1130:0:4401
-1131:3:4346
-1132:0:4401
-1133:2:1246
-1134:0:4401
-1135:3:4347
-1136:0:4401
-1137:1:14
-1138:0:4401
-1139:3:4346
-1140:0:4401
-1141:2:1245
-1142:0:4401
-1143:3:4347
-1144:0:4401
-1145:1:15
-1146:0:4401
-1147:3:4346
-1148:0:4401
-1149:2:1246
-1150:0:4401
-1151:3:4347
-1152:0:4401
-1153:1:16
-1154:1:20
-1155:1:21
-1156:1:29
-1157:1:30
-1158:1:34
-1159:1:35
-1160:1:43
-1161:1:48
-1162:1:52
-1163:1:53
-1164:1:60
-1165:1:61
-1166:1:72
-1167:1:73
-1168:1:74
-1169:1:85
-1170:1:90
-1171:1:91
-1172:0:4401
-1173:3:4346
-1174:0:4401
-1175:2:1245
-1176:0:4401
-1177:3:4347
-1178:0:4401
-1179:1:103
-1180:0:4401
-1181:3:4346
-1182:0:4401
-1183:2:1246
-1184:0:4401
-1185:3:4347
-1186:0:4401
-1187:2:1247
-1188:0:4401
-1189:3:4346
-1190:0:4401
-1191:2:1253
-1192:0:4401
-1193:3:4347
-1194:0:4401
-1195:2:1254
-1196:0:4399
-1197:3:4346
-1198:0:4405
-1199:3:4347
-1200:0:4405
-1201:2:1257
-1202:0:4405
-1203:3:4346
-1204:0:4405
-1205:2:1258
-1206:0:4405
-1207:3:4347
-1208:0:4405
-1209:2:1259
-1210:2:1263
-1211:2:1264
-1212:2:1272
-1213:2:1273
-1214:2:1277
-1215:2:1278
-1216:2:1286
-1217:2:1291
-1218:2:1295
-1219:2:1296
-1220:2:1303
-1221:2:1304
-1222:2:1315
-1223:2:1316
-1224:2:1317
-1225:2:1328
-1226:2:1333
-1227:2:1334
-1228:0:4405
-1229:3:4346
-1230:0:4405
-1231:2:1346
-1232:0:4405
-1233:3:4347
-1234:0:4405
-1235:2:1347
-1236:0:4405
-1237:3:4346
-1238:0:4405
-1239:1:104
--1:-1:-1
-1240:0:4405
-1241:3:4347
-1242:0:4405
-1243:3:4346
-1244:0:4405
-1245:2:1348
-1246:0:4405
-1247:3:4347
-1248:0:4405
-1249:2:1347
-1250:0:4405
-1251:3:4346
-1252:0:4405
-1253:1:105
-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 291: Claim reached state 9 (line 748)
-Depth= 2677 States= 1e+06 Transitions= 1.57e+07 Memory= 487.932 t= 13.4 R= 7e+04
-Depth= 3023 States= 2e+06 Transitions= 3.19e+07 Memory= 509.709 t= 27.3 R= 7e+04
-Depth= 3610 States= 3e+06 Transitions= 4.84e+07 Memory= 531.486 t= 41.6 R= 7e+04
-pan: resizing hashtable to -w22.. done
-Depth= 3956 States= 4e+06 Transitions= 6.63e+07 Memory= 595.029 t= 57 R= 7e+04
-Depth= 3956 States= 5e+06 Transitions= 8.67e+07 Memory= 617.783 t= 74.5 R= 7e+04
-Depth= 3956 States= 6e+06 Transitions= 1.08e+08 Memory= 660.850 t= 93 R= 6e+04
-Depth= 3956 States= 7e+06 Transitions= 1.28e+08 Memory= 690.928 t= 110 R= 6e+04
-Depth= 3956 States= 8e+06 Transitions= 1.51e+08 Memory= 729.600 t= 129 R= 6e+04
-Depth= 3956 States= 9e+06 Transitions= 1.7e+08 Memory= 765.830 t= 146 R= 6e+04
-pan: resizing hashtable to -w24.. done
-Depth= 3956 States= 1e+07 Transitions= 1.92e+08 Memory= 919.611 t= 166 R= 6e+04
-Depth= 3956 States= 1.1e+07 Transitions= 2.13e+08 Memory= 958.576 t= 183 R= 6e+04
-Depth= 3956 States= 1.2e+07 Transitions= 2.33e+08 Memory= 985.627 t= 201 R= 6e+04
-Depth= 3956 States= 1.3e+07 Transitions= 2.55e+08 Memory= 1027.033 t= 220 R= 6e+04
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3956, errors: 0
- 7045896 states, stored (1.35792e+07 visited)
-2.5326206e+08 states, matched
-2.668413e+08 transitions (= visited+matched)
-9.9425626e+08 atomic steps
-hash conflicts: 65494104 (resolved)
-
-Stats on memory usage (in Megabytes):
- 564.437 equivalent memory usage for states (stored*(State-vector + overhead))
- 465.758 actual memory usage for states (compression: 82.52%)
- state-vector as stored = 41 byte + 28 byte overhead
- 128.000 memory used for hash table (-w24)
- 457.764 memory used for DFS stack (-m10000000)
- 1051.350 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 230 seconds
-pan: rate 59137.889 states/second
-pan: avg transition delay 8.6051e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-depth 15: Claim reached state 9 (line 750)
-depth 291: Claim reached state 9 (line 749)
-pan: acceptance cycle (at depth 4308)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 4820, errors: 1
- 62091 states, stored (169917 visited)
- 2179326 states, matched
- 2349243 transitions (= visited+matched)
- 8805349 atomic steps
-hash conflicts: 50953 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4.974 equivalent memory usage for states (stored*(State-vector + overhead))
- 4.145 actual memory usage for states (compression: 83.33%)
- state-vector as stored = 42 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 469.865 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 151, "(1)"
- line 419, "pan.___", state 181, "(1)"
- line 400, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 242, "(1)"
- line 419, "pan.___", state 272, "(1)"
- line 400, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 360, "(1)"
- line 419, "pan.___", state 390, "(1)"
- line 541, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 402, "pan.___", state 134, "((i<1))"
- line 402, "pan.___", state 134, "((i>=1))"
- line 410, "pan.___", state 153, "(1)"
- line 410, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 154, "else"
- line 410, "pan.___", state 157, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 414, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 167, "else"
- line 414, "pan.___", state 170, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 412, "pan.___", state 176, "((i<1))"
- line 412, "pan.___", state 176, "((i>=1))"
- line 419, "pan.___", state 183, "(1)"
- line 419, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 184, "else"
- line 419, "pan.___", state 187, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 370, "pan.___", state 193, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 647, "pan.___", state 202, "((write_lock==0))"
- line 647, "pan.___", state 202, "else"
- line 645, "pan.___", state 203, "(1)"
- line 176, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 225, "((j<1))"
- line 178, "pan.___", state 225, "((j>=1))"
- line 184, "pan.___", state 230, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 240, "(1)"
- line 165, "pan.___", state 248, "(1)"
- line 165, "pan.___", state 249, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 165, "pan.___", state 249, "else"
- line 163, "pan.___", state 254, "((j<1))"
- line 163, "pan.___", state 254, "((j>=1))"
- line 169, "pan.___", state 260, "(1)"
- line 169, "pan.___", state 261, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 169, "pan.___", state 261, "else"
- line 171, "pan.___", state 264, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 171, "pan.___", state 264, "else"
- line 176, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 180, "pan.___", state 280, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 288, "((j<1))"
- line 178, "pan.___", state 288, "((j>=1))"
- line 184, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 303, "(1)"
- line 165, "pan.___", state 311, "(1)"
- line 165, "pan.___", state 312, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 165, "pan.___", state 312, "else"
- line 163, "pan.___", state 317, "((j<1))"
- line 163, "pan.___", state 317, "((j>=1))"
- line 169, "pan.___", state 323, "(1)"
- line 169, "pan.___", state 324, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 169, "pan.___", state 324, "else"
- line 171, "pan.___", state 327, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 171, "pan.___", state 327, "else"
- line 215, "pan.___", state 333, "((i<1))"
- line 215, "pan.___", state 333, "((i>=1))"
- line 176, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 355, "((j<1))"
- line 178, "pan.___", state 355, "((j>=1))"
- line 184, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 370, "(1)"
- line 165, "pan.___", state 378, "(1)"
- line 165, "pan.___", state 379, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 165, "pan.___", state 379, "else"
- line 163, "pan.___", state 384, "((j<1))"
- line 163, "pan.___", state 384, "((j>=1))"
- line 169, "pan.___", state 390, "(1)"
- line 169, "pan.___", state 391, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 169, "pan.___", state 391, "else"
- line 171, "pan.___", state 394, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 171, "pan.___", state 394, "else"
- line 400, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 410, "(1)"
- line 404, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 424, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 402, "pan.___", state 430, "((i<1))"
- line 402, "pan.___", state 430, "((i>=1))"
- line 409, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 449, "(1)"
- line 410, "pan.___", state 450, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 450, "else"
- line 410, "pan.___", state 453, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 414, "pan.___", state 462, "(1)"
- line 414, "pan.___", state 463, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 463, "else"
- line 414, "pan.___", state 466, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 412, "pan.___", state 472, "((i<1))"
- line 412, "pan.___", state 472, "((i>=1))"
- line 419, "pan.___", state 479, "(1)"
- line 419, "pan.___", state 480, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 480, "else"
- line 419, "pan.___", state 483, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 370, "pan.___", state 489, "(1)"
- line 662, "pan.___", state 492, "cached_urcu_gp_ctr.val[_pid] = (tmp^(1<<7))"
- line 400, "pan.___", state 498, "(1)"
- line 400, "pan.___", state 499, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 499, "else"
- line 400, "pan.___", state 502, "(1)"
- line 404, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 516, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 402, "pan.___", state 522, "((i<1))"
- line 402, "pan.___", state 522, "((i>=1))"
- line 409, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 541, "(1)"
- line 410, "pan.___", state 542, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 542, "else"
- line 410, "pan.___", state 545, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 414, "pan.___", state 554, "(1)"
- line 414, "pan.___", state 555, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 555, "else"
- line 414, "pan.___", state 558, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 412, "pan.___", state 564, "((i<1))"
- line 412, "pan.___", state 564, "((i>=1))"
- line 419, "pan.___", state 571, "(1)"
- line 419, "pan.___", state 572, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 572, "else"
- line 419, "pan.___", state 575, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 370, "pan.___", state 581, "(1)"
- line 400, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 595, "(1)"
- line 404, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 609, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 402, "pan.___", state 615, "((i<1))"
- line 402, "pan.___", state 615, "((i>=1))"
- line 409, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 634, "(1)"
- line 410, "pan.___", state 635, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 635, "else"
- line 410, "pan.___", state 638, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 414, "pan.___", state 647, "(1)"
- line 414, "pan.___", state 648, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 648, "else"
- line 414, "pan.___", state 651, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 412, "pan.___", state 657, "((i<1))"
- line 412, "pan.___", state 657, "((i>=1))"
- line 419, "pan.___", state 664, "(1)"
- line 419, "pan.___", state 665, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 665, "else"
- line 419, "pan.___", state 668, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 370, "pan.___", state 674, "(1)"
- line 400, "pan.___", state 679, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 681, "(1)"
- line 400, "pan.___", state 682, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 682, "else"
- line 400, "pan.___", state 685, "(1)"
- line 404, "pan.___", state 693, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 695, "(1)"
- line 404, "pan.___", state 696, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 696, "else"
- line 404, "pan.___", state 699, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 402, "pan.___", state 705, "((i<1))"
- line 402, "pan.___", state 705, "((i>=1))"
- line 409, "pan.___", state 711, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 724, "(1)"
- line 410, "pan.___", state 725, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 725, "else"
- line 410, "pan.___", state 728, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 414, "pan.___", state 737, "(1)"
- line 414, "pan.___", state 738, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 738, "else"
- line 414, "pan.___", state 741, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 412, "pan.___", state 747, "((i<1))"
- line 412, "pan.___", state 747, "((i>=1))"
- line 419, "pan.___", state 754, "(1)"
- line 419, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 755, "else"
- line 419, "pan.___", state 758, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 370, "pan.___", state 764, "(1)"
- line 430, "pan.___", state 767, "(((tmp2&((1<<7)-1))&&((tmp2^cached_urcu_gp_ctr.val[_pid])&(1<<7))))"
- line 430, "pan.___", state 767, "else"
- line 400, "pan.___", state 777, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 779, "(1)"
- line 400, "pan.___", state 780, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 780, "else"
- line 400, "pan.___", state 783, "(1)"
- line 404, "pan.___", state 791, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 793, "(1)"
- line 404, "pan.___", state 794, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 794, "else"
- line 404, "pan.___", state 797, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 402, "pan.___", state 803, "((i<1))"
- line 402, "pan.___", state 803, "((i>=1))"
- line 409, "pan.___", state 809, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 822, "(1)"
- line 410, "pan.___", state 823, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 823, "else"
- line 410, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 414, "pan.___", state 835, "(1)"
- line 414, "pan.___", state 836, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 836, "else"
- line 414, "pan.___", state 839, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 412, "pan.___", state 845, "((i<1))"
- line 412, "pan.___", state 845, "((i>=1))"
- line 419, "pan.___", state 852, "(1)"
- line 419, "pan.___", state 853, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 853, "else"
- line 419, "pan.___", state 856, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 370, "pan.___", state 862, "(1)"
- line 449, "pan.___", state 870, "((tmp<1))"
- line 449, "pan.___", state 870, "((tmp>=1))"
- line 462, "pan.___", state 873, "tmp = 0"
- line 400, "pan.___", state 877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 883, "(1)"
- line 404, "pan.___", state 891, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 897, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 903, "((i<1))"
- line 402, "pan.___", state 903, "((i>=1))"
- line 409, "pan.___", state 909, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 922, "(1)"
- line 410, "pan.___", state 923, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 923, "else"
- line 410, "pan.___", state 926, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 414, "pan.___", state 935, "(1)"
- line 414, "pan.___", state 936, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 936, "else"
- line 414, "pan.___", state 939, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 945, "((i<1))"
- line 412, "pan.___", state 945, "((i>=1))"
- line 419, "pan.___", state 952, "(1)"
- line 419, "pan.___", state 953, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 953, "else"
- line 419, "pan.___", state 956, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 370, "pan.___", state 962, "(1)"
- line 671, "pan.___", state 963, "tmp = cached_urcu_gp_ctr.val[_pid]"
- line 400, "pan.___", state 967, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 973, "(1)"
- line 404, "pan.___", state 981, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 987, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 402, "pan.___", state 993, "((i<1))"
- line 402, "pan.___", state 993, "((i>=1))"
- line 409, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1012, "(1)"
- line 410, "pan.___", state 1013, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1013, "else"
- line 410, "pan.___", state 1016, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 414, "pan.___", state 1025, "(1)"
- line 414, "pan.___", state 1026, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1026, "else"
- line 414, "pan.___", state 1029, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 412, "pan.___", state 1035, "((i<1))"
- line 412, "pan.___", state 1035, "((i>=1))"
- line 419, "pan.___", state 1042, "(1)"
- line 419, "pan.___", state 1043, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1043, "else"
- line 419, "pan.___", state 1046, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 370, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1061, "(1)"
- line 404, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1117, "(1)"
- line 419, "pan.___", state 1134, "(1)"
- line 404, "pan.___", state 1166, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1184, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1210, "(1)"
- line 419, "pan.___", state 1227, "(1)"
- line 400, "pan.___", state 1242, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1256, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1287, "(1)"
- line 414, "pan.___", state 1300, "(1)"
- line 419, "pan.___", state 1317, "(1)"
- line 400, "pan.___", state 1340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1342, "(1)"
- line 400, "pan.___", state 1343, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1343, "else"
- line 400, "pan.___", state 1346, "(1)"
- line 404, "pan.___", state 1354, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1356, "(1)"
- line 404, "pan.___", state 1357, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1357, "else"
- line 404, "pan.___", state 1360, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 402, "pan.___", state 1366, "((i<1))"
- line 402, "pan.___", state 1366, "((i>=1))"
- line 409, "pan.___", state 1372, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1385, "(1)"
- line 410, "pan.___", state 1386, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1386, "else"
- line 410, "pan.___", state 1389, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 414, "pan.___", state 1398, "(1)"
- line 414, "pan.___", state 1399, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1399, "else"
- line 414, "pan.___", state 1402, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 412, "pan.___", state 1408, "((i<1))"
- line 412, "pan.___", state 1408, "((i>=1))"
- line 419, "pan.___", state 1415, "(1)"
- line 419, "pan.___", state 1416, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1416, "else"
- line 419, "pan.___", state 1419, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 180, "pan.___", state 1448, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 184, "pan.___", state 1461, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 1471, "(1)"
- line 165, "pan.___", state 1479, "(1)"
- line 169, "pan.___", state 1491, "(1)"
- line 176, "pan.___", state 1502, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 184, "pan.___", state 1524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 1534, "(1)"
- line 165, "pan.___", state 1542, "(1)"
- line 169, "pan.___", state 1554, "(1)"
- line 176, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 184, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 1601, "(1)"
- line 165, "pan.___", state 1609, "(1)"
- line 169, "pan.___", state 1621, "(1)"
- line 370, "pan.___", state 1642, "(1)"
- line 696, "pan.___", state 1643, "(1)"
- line 703, "pan.___", state 1646, "-end-"
- (308 of 1646 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 752, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 2.02 seconds
-pan: rate 84117.327 states/second
-pan: avg transition delay 8.5985e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-//#define READER_NEST_LEVEL 1
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-4:3:2063
-5:3:2066
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-4781:2:1666
-4782:2:1670
-4783:2:1671
-4784:2:1679
-4785:2:1684
-4786:2:1688
-4787:2:1689
-4788:2:1696
-4789:2:1697
-4790:2:1708
-4791:2:1716
-4792:2:1717
-4793:2:1721
-4794:2:1726
-4795:2:1727
-4796:0:2112
-4797:2:1739
-4798:0:2112
-4799:2:1560
-4800:0:2112
-4801:2:1561
-4802:0:2112
-4803:1:12
-4804:1:16
-4805:1:17
-4806:1:25
-4807:1:26
-4808:1:27
-4809:1:39
-4810:1:44
-4811:1:48
-4812:1:49
-4813:1:56
-4814:1:57
-4815:1:68
-4816:1:69
-4817:1:70
-4818:1:81
-4819:1:86
-4820:1:87
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
+++ /dev/null
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) Mathieu Desnoyers, 2009
-#
-# Authors: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-#CFLAGS=-DSAFETY
-#for multi-core verif, 15.5GB shared mem, use files if full
-#CFLAGS=-DHASH64 -DMEMLIM=15500 -DNCORE=2
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88 -DMEMLIM=15500 -DNCORE=8
-
-#liveness
-#CFLAGS=-DHASH64 -DCOLLAPSE -DMA=88
-CFLAGS=-DHASH64
-
-SPINFILE=urcu.spin
-
-default:
- make urcu_free | tee urcu_free.log
- #nested useless with signal test.
- #make urcu_free_nested | tee urcu_free_nested.log
- make urcu_free_no_rmb | tee urcu_free_no_rmb.log
- make urcu_free_no_wmb | tee urcu_free_no_wmb.log
- make urcu_free_no_mb | tee urcu_free_no_mb.log
- make urcu_free_single_flip | tee urcu_free_single_flip.log
- make urcu_progress_writer | tee urcu_progress_writer.log
- make urcu_progress_reader | tee urcu_progress_reader.log
- make urcu_progress_writer_error | tee urcu_progress_writer_error.log
- make asserts | tee asserts.log
- make summary
-
-#show trail : spin -v -t -N pan.ltl input.spin
-# after each individual make.
-
-summary:
- @echo
- @echo "Verification summary"
- @grep errors: *.log
-
-asserts: clean
- cat DEFINES > .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X .input.spin
- gcc -O2 -w ${CFLAGS} -DSAFETY -o pan pan.c
- ./pan -v -c1 -X -m10000000 -w20
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free: clean urcu_free_ltl run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested: clean urcu_free_ltl urcu_free_nested_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_nested_define:
- cp urcu_free_nested.define .input.define
-
-urcu_free_no_rmb: clean urcu_free_ltl urcu_free_no_rmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_rmb_define:
- cp urcu_free_no_rmb.define .input.define
-
-urcu_free_no_wmb: clean urcu_free_ltl urcu_free_no_wmb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_wmb_define:
- cp urcu_free_no_wmb.define .input.define
-
-urcu_free_no_mb: clean urcu_free_ltl urcu_free_no_mb_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_no_mb_define:
- cp urcu_free_no_mb.define .input.define
-
-urcu_free_single_flip: clean urcu_free_ltl urcu_free_single_flip_define run
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_free_single_flip_define:
- cp urcu_free_single_flip.define .input.define
-
-urcu_free_ltl:
- touch .input.define
- cat .input.define >> pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-
-# Progress checks
-
-urcu_progress_writer: clean urcu_progress_writer_ltl \
- urcu_progress_writer_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_define:
- cp urcu_progress_writer.define .input.define
-
-urcu_progress_writer_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_reader: clean urcu_progress_reader_ltl \
- urcu_progress_reader_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_reader_define:
- cp urcu_progress_reader.define .input.define
-
-urcu_progress_reader_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-urcu_progress_writer_error: clean urcu_progress_writer_error_ltl \
- urcu_progress_writer_error_define run_weak_fair
- cp .input.spin $@.spin.input
- -cp .input.spin.trail $@.spin.input.trail
-
-urcu_progress_writer_error_define:
- cp urcu_progress_writer_error.define .input.define
-
-urcu_progress_writer_error_ltl:
- touch .input.define
- cat .input.define > pan.ltl
- cat DEFINES >> pan.ltl
- spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-
-
-run_weak_fair: pan
- ./pan -a -f -v -c1 -X -m10000000 -w20
-
-run: pan
- ./pan -a -v -c1 -X -m10000000 -w20
-
-pan: pan.c
- gcc -O2 -w ${CFLAGS} -o pan pan.c
-
-pan.c: pan.ltl ${SPINFILE}
- cat .input.define > .input.spin
- cat DEFINES >> .input.spin
- cat ${SPINFILE} >> .input.spin
- rm -f .input.spin.trail
- spin -a -X -N pan.ltl .input.spin
-
-.PHONY: clean default distclean summary
-clean:
- rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-distclean:
- rm -f *.trail *.input *.log
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-cat DEFINES > .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w20
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim - (none specified)
- assertion violations +
- cycle checks - (disabled by -DSAFETY)
- invalid end states +
-
-State-vector 48 byte, depth reached 2084, errors: 0
- 847558 states, stored
- 9221089 states, matched
- 10068647 transitions (= stored+matched)
- 36786866 atomic steps
-hash conflicts: 2126850 (resolved)
-
-Stats on memory usage (in Megabytes):
- 61.430 equivalent memory usage for states (stored*(State-vector + overhead))
- 45.632 actual memory usage for states (compression: 74.28%)
- state-vector as stored = 28 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 511.369 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, ".input.spin", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 61, "(1)"
- line 417, ".input.spin", state 91, "(1)"
- line 398, ".input.spin", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 151, "(1)"
- line 417, ".input.spin", state 181, "(1)"
- line 398, ".input.spin", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 242, "(1)"
- line 417, ".input.spin", state 272, "(1)"
- line 398, ".input.spin", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 360, "(1)"
- line 417, ".input.spin", state 390, "(1)"
- line 539, ".input.spin", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 398, ".input.spin", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 59, "(1)"
- line 412, ".input.spin", state 72, "(1)"
- line 417, ".input.spin", state 89, "(1)"
- line 398, ".input.spin", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 153, "(1)"
- line 412, ".input.spin", state 166, "(1)"
- line 651, ".input.spin", state 199, "(1)"
- line 174, ".input.spin", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 240, "(1)"
- line 163, ".input.spin", state 248, "(1)"
- line 167, ".input.spin", state 260, "(1)"
- line 174, ".input.spin", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 303, "(1)"
- line 163, ".input.spin", state 311, "(1)"
- line 167, ".input.spin", state 323, "(1)"
- line 174, ".input.spin", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 370, "(1)"
- line 163, ".input.spin", state 378, "(1)"
- line 167, ".input.spin", state 390, "(1)"
- line 398, ".input.spin", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 449, "(1)"
- line 412, ".input.spin", state 462, "(1)"
- line 417, ".input.spin", state 479, "(1)"
- line 398, ".input.spin", state 498, "(1)"
- line 402, ".input.spin", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 554, "(1)"
- line 417, ".input.spin", state 571, "(1)"
- line 402, ".input.spin", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 647, "(1)"
- line 417, ".input.spin", state 664, "(1)"
- line 178, ".input.spin", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 710, "(1)"
- line 163, ".input.spin", state 718, "(1)"
- line 167, ".input.spin", state 730, "(1)"
- line 174, ".input.spin", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 773, "(1)"
- line 163, ".input.spin", state 781, "(1)"
- line 167, ".input.spin", state 793, "(1)"
- line 174, ".input.spin", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 840, "(1)"
- line 163, ".input.spin", state 848, "(1)"
- line 167, ".input.spin", state 860, "(1)"
- line 398, ".input.spin", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, ".input.spin", state 884, "(1)"
- line 398, ".input.spin", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, ".input.spin", state 885, "else"
- line 398, ".input.spin", state 888, "(1)"
- line 402, ".input.spin", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 898, "(1)"
- line 402, ".input.spin", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, ".input.spin", state 899, "else"
- line 402, ".input.spin", state 902, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 402, ".input.spin", state 903, "(1)"
- line 400, ".input.spin", state 908, "((i<1))"
- line 400, ".input.spin", state 908, "((i>=1))"
- line 407, ".input.spin", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 927, "(1)"
- line 408, ".input.spin", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, ".input.spin", state 928, "else"
- line 408, ".input.spin", state 931, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 408, ".input.spin", state 932, "(1)"
- line 412, ".input.spin", state 940, "(1)"
- line 412, ".input.spin", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, ".input.spin", state 941, "else"
- line 412, ".input.spin", state 944, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 412, ".input.spin", state 945, "(1)"
- line 410, ".input.spin", state 950, "((i<1))"
- line 410, ".input.spin", state 950, "((i>=1))"
- line 417, ".input.spin", state 957, "(1)"
- line 417, ".input.spin", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, ".input.spin", state 958, "else"
- line 417, ".input.spin", state 961, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 417, ".input.spin", state 962, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 419, ".input.spin", state 965, "(1)"
- line 402, ".input.spin", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1040, "(1)"
- line 417, ".input.spin", state 1057, "(1)"
- line 402, ".input.spin", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1130, "(1)"
- line 417, ".input.spin", state 1147, "(1)"
- line 398, ".input.spin", state 1166, "(1)"
- line 402, ".input.spin", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1222, "(1)"
- line 417, ".input.spin", state 1239, "(1)"
- line 402, ".input.spin", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, ".input.spin", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, ".input.spin", state 1315, "(1)"
- line 417, ".input.spin", state 1332, "(1)"
- line 178, ".input.spin", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1378, "(1)"
- line 163, ".input.spin", state 1386, "(1)"
- line 167, ".input.spin", state 1398, "(1)"
- line 174, ".input.spin", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1441, "(1)"
- line 163, ".input.spin", state 1449, "(1)"
- line 167, ".input.spin", state 1461, "(1)"
- line 174, ".input.spin", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1508, "(1)"
- line 163, ".input.spin", state 1516, "(1)"
- line 167, ".input.spin", state 1528, "(1)"
- line 398, ".input.spin", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, ".input.spin", state 1552, "(1)"
- line 398, ".input.spin", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, ".input.spin", state 1553, "else"
- line 398, ".input.spin", state 1556, "(1)"
- line 402, ".input.spin", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, ".input.spin", state 1566, "(1)"
- line 402, ".input.spin", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, ".input.spin", state 1567, "else"
- line 402, ".input.spin", state 1570, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 402, ".input.spin", state 1571, "(1)"
- line 400, ".input.spin", state 1576, "((i<1))"
- line 400, ".input.spin", state 1576, "((i>=1))"
- line 407, ".input.spin", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, ".input.spin", state 1595, "(1)"
- line 408, ".input.spin", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, ".input.spin", state 1596, "else"
- line 408, ".input.spin", state 1599, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 408, ".input.spin", state 1600, "(1)"
- line 412, ".input.spin", state 1608, "(1)"
- line 412, ".input.spin", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, ".input.spin", state 1609, "else"
- line 412, ".input.spin", state 1612, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 412, ".input.spin", state 1613, "(1)"
- line 410, ".input.spin", state 1618, "((i<1))"
- line 410, ".input.spin", state 1618, "((i>=1))"
- line 417, ".input.spin", state 1625, "(1)"
- line 417, ".input.spin", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, ".input.spin", state 1626, "else"
- line 417, ".input.spin", state 1629, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 417, ".input.spin", state 1630, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 419, ".input.spin", state 1633, "(1)"
- line 178, ".input.spin", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1681, "(1)"
- line 163, ".input.spin", state 1689, "(1)"
- line 167, ".input.spin", state 1701, "(1)"
- line 174, ".input.spin", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, ".input.spin", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, ".input.spin", state 1744, "(1)"
- line 163, ".input.spin", state 1752, "(1)"
- line 167, ".input.spin", state 1764, "(1)"
- line 174, ".input.spin", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, ".input.spin", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, ".input.spin", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, ".input.spin", state 1811, "(1)"
- line 163, ".input.spin", state 1819, "(1)"
- line 167, ".input.spin", state 1831, "(1)"
- line 701, ".input.spin", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-
-pan: elapsed time 6.68 seconds
-pan: rate 126879.94 states/second
-pan: avg transition delay 6.6345e-07 usec
-cp .input.spin asserts.spin.input
-cp .input.spin.trail asserts.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--4:-4:-4
-1:0:2673
-2:0:2674
-3:0:2675
-4:0:2676
-5:4:1129
+++ /dev/null
-http://spinroot.com/spin/Man/ltl.html
-http://en.wikipedia.org/wiki/Linear_temporal_logic
-http://www.dcs.gla.ac.uk/~muffy/MRS4-2002/lect11.ppt
-
-http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/index.php
-http://spinroot.com/spin/Man/index.html
-http://spinroot.com/spin/Man/promela.html
-
-LTL vs CTL :
-
-http://spinroot.com/spin/Doc/course/lecture12.pdf p. 9, p. 15, p. 18
-http://www-i2.informatik.rwth-aachen.de/i2/fileadmin/user_upload/documents/Introduction_to_Model_Checking/mc_lec18.pdf
- (downloaded)
+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 743)
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 2560, errors: 0
- 954166 states, stored
- 10460008 states, matched
- 11414174 transitions (= stored+matched)
- 41707752 atomic steps
-hash conflicts: 2907736 (resolved)
-
-Stats on memory usage (in Megabytes):
- 76.437 equivalent memory usage for states (stored*(State-vector + overhead))
- 58.605 actual memory usage for states (compression: 76.67%)
- state-vector as stored = 36 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 524.358 total actual memory usage
-
-unreached in proctype urcu_reader
- line 398, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 61, "(1)"
- line 417, "pan.___", state 91, "(1)"
- line 398, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 151, "(1)"
- line 417, "pan.___", state 181, "(1)"
- line 398, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 242, "(1)"
- line 417, "pan.___", state 272, "(1)"
- line 398, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 360, "(1)"
- line 417, "pan.___", state 390, "(1)"
- line 539, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 398, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 59, "(1)"
- line 412, "pan.___", state 72, "(1)"
- line 417, "pan.___", state 89, "(1)"
- line 398, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 153, "(1)"
- line 412, "pan.___", state 166, "(1)"
- line 651, "pan.___", state 199, "(1)"
- line 174, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 240, "(1)"
- line 163, "pan.___", state 248, "(1)"
- line 167, "pan.___", state 260, "(1)"
- line 174, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 303, "(1)"
- line 163, "pan.___", state 311, "(1)"
- line 167, "pan.___", state 323, "(1)"
- line 174, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 370, "(1)"
- line 163, "pan.___", state 378, "(1)"
- line 167, "pan.___", state 390, "(1)"
- line 398, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 449, "(1)"
- line 412, "pan.___", state 462, "(1)"
- line 417, "pan.___", state 479, "(1)"
- line 398, "pan.___", state 498, "(1)"
- line 402, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 554, "(1)"
- line 417, "pan.___", state 571, "(1)"
- line 402, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 647, "(1)"
- line 417, "pan.___", state 664, "(1)"
- line 178, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 710, "(1)"
- line 163, "pan.___", state 718, "(1)"
- line 167, "pan.___", state 730, "(1)"
- line 174, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 773, "(1)"
- line 163, "pan.___", state 781, "(1)"
- line 167, "pan.___", state 793, "(1)"
- line 174, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 840, "(1)"
- line 163, "pan.___", state 848, "(1)"
- line 167, "pan.___", state 860, "(1)"
- line 398, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, "pan.___", state 884, "(1)"
- line 398, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, "pan.___", state 885, "else"
- line 398, "pan.___", state 888, "(1)"
- line 402, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, "pan.___", state 899, "else"
- line 402, "pan.___", state 902, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 402, "pan.___", state 903, "(1)"
- line 400, "pan.___", state 908, "((i<1))"
- line 400, "pan.___", state 908, "((i>=1))"
- line 407, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 927, "(1)"
- line 408, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, "pan.___", state 928, "else"
- line 408, "pan.___", state 931, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 408, "pan.___", state 932, "(1)"
- line 412, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, "pan.___", state 941, "else"
- line 412, "pan.___", state 944, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 412, "pan.___", state 945, "(1)"
- line 410, "pan.___", state 950, "((i<1))"
- line 410, "pan.___", state 950, "((i>=1))"
- line 417, "pan.___", state 957, "(1)"
- line 417, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, "pan.___", state 958, "else"
- line 417, "pan.___", state 961, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 417, "pan.___", state 962, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 419, "pan.___", state 965, "(1)"
- line 402, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1040, "(1)"
- line 417, "pan.___", state 1057, "(1)"
- line 402, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1130, "(1)"
- line 417, "pan.___", state 1147, "(1)"
- line 398, "pan.___", state 1166, "(1)"
- line 402, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1222, "(1)"
- line 417, "pan.___", state 1239, "(1)"
- line 402, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 407, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 412, "pan.___", state 1315, "(1)"
- line 417, "pan.___", state 1332, "(1)"
- line 178, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1378, "(1)"
- line 163, "pan.___", state 1386, "(1)"
- line 167, "pan.___", state 1398, "(1)"
- line 174, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1441, "(1)"
- line 163, "pan.___", state 1449, "(1)"
- line 167, "pan.___", state 1461, "(1)"
- line 174, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1508, "(1)"
- line 163, "pan.___", state 1516, "(1)"
- line 167, "pan.___", state 1528, "(1)"
- line 398, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 398, "pan.___", state 1552, "(1)"
- line 398, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 398, "pan.___", state 1553, "else"
- line 398, "pan.___", state 1556, "(1)"
- line 402, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 402, "pan.___", state 1566, "(1)"
- line 402, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 402, "pan.___", state 1567, "else"
- line 402, "pan.___", state 1570, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 402, "pan.___", state 1571, "(1)"
- line 400, "pan.___", state 1576, "((i<1))"
- line 400, "pan.___", state 1576, "((i>=1))"
- line 407, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1595, "(1)"
- line 408, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 408, "pan.___", state 1596, "else"
- line 408, "pan.___", state 1599, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 408, "pan.___", state 1600, "(1)"
- line 412, "pan.___", state 1608, "(1)"
- line 412, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 412, "pan.___", state 1609, "else"
- line 412, "pan.___", state 1612, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 412, "pan.___", state 1613, "(1)"
- line 410, "pan.___", state 1618, "((i<1))"
- line 410, "pan.___", state 1618, "((i>=1))"
- line 417, "pan.___", state 1625, "(1)"
- line 417, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 417, "pan.___", state 1626, "else"
- line 417, "pan.___", state 1629, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 417, "pan.___", state 1630, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 419, "pan.___", state 1633, "(1)"
- line 178, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1681, "(1)"
- line 163, "pan.___", state 1689, "(1)"
- line 167, "pan.___", state 1701, "(1)"
- line 174, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 182, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 159, "pan.___", state 1744, "(1)"
- line 163, "pan.___", state 1752, "(1)"
- line 167, "pan.___", state 1764, "(1)"
- line 174, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 182, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 159, "pan.___", state 1811, "(1)"
- line 163, "pan.___", state 1819, "(1)"
- line 167, "pan.___", state 1831, "(1)"
- line 701, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 748, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 9.16 seconds
-pan: rate 104166.59 states/second
-pan: avg transition delay 8.0251e-07 usec
-cp .input.spin urcu_free.spin.input
-cp .input.spin.trail urcu_free.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
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-3:4:4320
-4:4:4320
-5:4:4320
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-7:4:4331
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-10:4:4334
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-21:4:4355
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-350:0:4365
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+++ /dev/null
-#define READER_NEST_LEVEL 2
+++ /dev/null
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_nested.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 742)
-Depth= 3880 States= 1e+06 Transitions= 1.18e+07 Memory= 527.190 t= 9.48 R= 1e+05
-Depth= 3880 States= 2e+06 Transitions= 2.39e+07 Memory= 588.225 t= 19.6 R= 1e+05
-Depth= 3880 States= 3e+06 Transitions= 3.61e+07 Memory= 649.260 t= 30.3 R= 1e+05
+++ /dev/null
-#define READER_NEST_LEVEL 1
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-#define TEST_SIGNAL
-#define TEST_SIGNAL_ON_READ
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-#define get_pid() ((_pid < 1) -> 0 : 1)
-#elif defined(TEST_SIGNAL_ON_READ)
-#define get_pid() ((_pid < 2) -> 0 : 1)
-#else
-#define get_pid() (_pid)
-#endif
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb(i, j)
-{
- if
- :: get_pid() >= NR_READERS ->
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
- :: else -> skip;
- fi;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-#define get_readerid() (get_pid())
-#define get_writerid() (get_readerid() + NR_READERS)
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- dispatch_sighand_read_exec();
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- ooo_mem(i);
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- ooo_mem(i);
- data_access[get_readerid()] = 1;
- ooo_mem(i);
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
- /* Only test progress of one random reader. They are all the
- * same. */
- if
- :: get_readerid() == 0 ->
-progress_reader:
- skip;
- fi;
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4365
-2:4:4317
-3:4:4320
-4:4:4320
-5:4:4320
-6:4:4323
-7:4:4331
-8:4:4331
-9:4:4331
-10:4:4334
-11:4:4340
-12:4:4344
-13:4:4344
-14:4:4344
-15:4:4347
-16:4:4340
-17:4:4344
-18:4:4344
-19:4:4344
-20:4:4347
-21:4:4355
-22:4:4359
-23:4:4360
-24:0:4365
-25:4:4362
-26:0:4365
-27:3:2331
-28:0:4365
-29:3:2337
-30:0:4365
-31:3:2338
-32:0:4365
-33:3:2339
-34:3:2343
-35:3:2344
-36:3:2352
-37:3:2353
-38:3:2357
-39:3:2358
-40:3:2352
-41:3:2353
-42:3:2357
-43:3:2358
-44:3:2366
-45:3:2371
-46:3:2375
-47:3:2376
-48:3:2383
-49:3:2384
-50:3:2395
-51:3:2396
-52:3:2397
-53:3:2395
-54:3:2396
-55:3:2397
-56:3:2408
-57:3:2413
-58:3:2414
-59:0:4365
-60:3:2426
-61:0:4365
-62:3:2427
-63:0:4365
-64:2:1162
-65:0:4365
-66:3:2428
-67:0:4365
-68:2:1168
-69:0:4365
-70:2:1169
-71:0:4365
-72:3:2427
-73:0:4365
-74:2:1170
-75:0:4365
-76:3:2428
-77:0:4365
-78:3:2429
-79:0:4365
-80:3:2435
-81:3:2436
-82:0:4365
-83:3:2440
-84:3:2444
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-86:3:2453
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-88:3:2458
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-90:3:2453
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-92:3:2458
-93:3:2459
-94:3:2467
-95:3:2472
-96:3:2473
-97:3:2484
-98:3:2485
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-100:3:2497
-101:3:2498
-102:3:2496
-103:3:2497
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-105:3:2509
-106:3:2514
-107:3:2515
-108:0:4365
-109:3:2527
-110:0:4365
-111:3:2528
-112:0:4365
-113:2:1173
-114:0:4365
-115:3:2529
-116:0:4365
-117:2:1179
-118:0:4365
-119:2:1180
-120:0:4365
-121:3:2528
-122:0:4365
-123:2:1181
-124:2:1185
-125:2:1186
-126:2:1194
-127:2:1195
-128:2:1199
-129:2:1200
-130:2:1194
-131:2:1195
-132:2:1199
-133:2:1200
-134:2:1208
-135:2:1213
-136:2:1217
-137:2:1218
-138:2:1225
-139:2:1226
-140:2:1237
-141:2:1238
-142:2:1239
-143:2:1237
-144:2:1238
-145:2:1239
-146:2:1250
-147:2:1255
-148:2:1256
-149:0:4365
-150:3:2529
-151:0:4365
-152:2:1268
-153:0:4365
-154:3:2528
-155:0:4365
-156:2:1270
-157:0:4365
-158:3:2529
-159:0:4365
-160:2:1271
-161:2:1275
-162:2:1276
-163:2:1284
-164:2:1285
-165:2:1289
-166:2:1290
-167:2:1284
-168:2:1285
-169:2:1289
-170:2:1290
-171:2:1298
-172:2:1303
-173:2:1307
-174:2:1308
-175:2:1315
-176:2:1316
-177:2:1327
-178:2:1328
-179:2:1329
-180:2:1327
-181:2:1328
-182:2:1329
-183:2:1340
-184:2:1345
-185:2:1346
-186:0:4365
-187:2:1358
-188:0:4365
-189:2:1360
-190:0:4365
-191:3:2528
-192:0:4365
-193:2:1361
-194:0:4365
-195:3:2529
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-197:2:1362
-198:2:1366
-199:2:1367
-200:2:1375
-201:2:1376
-202:2:1380
-203:2:1381
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-205:2:1376
-206:2:1380
-207:2:1381
-208:2:1389
-209:2:1394
-210:2:1398
-211:2:1399
-212:2:1406
-213:2:1407
-214:2:1418
-215:2:1419
-216:2:1420
-217:2:1418
-218:2:1419
-219:2:1420
-220:2:1431
-221:2:1436
-222:2:1437
-223:0:4365
-224:2:1449
-225:0:4365
-226:3:2528
-227:0:4365
-228:2:1451
-229:0:4365
-230:3:2529
-231:0:4365
-232:2:1652
-233:0:4365
-234:2:1653
-235:0:4365
-236:2:1657
-237:0:4365
-238:2:1660
-239:0:4365
-240:3:2528
-241:0:4365
-242:2:1665
-243:2:1669
-244:2:1670
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-10968:3:2427
-10969:0:4365
-10970:2:1181
-10971:2:1185
-10972:2:1186
-10973:2:1194
-10974:2:1195
-10975:2:1199
-10976:2:1200
-10977:2:1194
-10978:2:1195
-10979:2:1199
-10980:2:1200
-10981:2:1208
-10982:2:1213
-10983:2:1217
-10984:2:1218
-10985:2:1225
-10986:2:1226
-10987:2:1237
-10988:2:1238
-10989:2:1239
-10990:2:1237
-10991:2:1238
-10992:2:1239
-10993:2:1250
-10994:2:1255
-10995:2:1256
-10996:0:4365
-10997:3:2428
-10998:0:4365
-10999:2:1268
-11000:0:4365
-11001:3:2427
-11002:0:4365
-11003:2:1270
-11004:0:4365
-11005:3:2428
-11006:0:4365
-11007:2:1271
-11008:2:1275
-11009:2:1276
-11010:2:1284
-11011:2:1285
-11012:2:1289
-11013:2:1290
-11014:2:1284
-11015:2:1285
-11016:2:1289
-11017:2:1290
-11018:2:1298
-11019:2:1303
-11020:2:1307
-11021:2:1308
-11022:2:1315
-11023:2:1316
-11024:2:1327
-11025:2:1328
-11026:2:1329
-11027:2:1327
-11028:2:1328
-11029:2:1329
-11030:2:1340
-11031:2:1345
-11032:2:1346
-11033:0:4365
-11034:2:1358
-11035:0:4365
-11036:2:1360
-11037:0:4365
-11038:3:2427
-11039:0:4365
-11040:2:1361
-11041:0:4365
-11042:3:2428
-11043:0:4365
-11044:2:1362
-11045:2:1366
-11046:2:1367
-11047:2:1375
-11048:2:1376
-11049:2:1380
-11050:2:1381
-11051:2:1375
-11052:2:1376
-11053:2:1380
-11054:2:1381
-11055:2:1389
-11056:2:1394
-11057:2:1398
-11058:2:1399
-11059:2:1406
-11060:2:1407
-11061:2:1418
-11062:2:1419
-11063:2:1420
-11064:2:1418
-11065:2:1419
-11066:2:1420
-11067:2:1431
-11068:2:1436
-11069:2:1437
-11070:0:4365
-11071:2:1449
-11072:0:4365
-11073:3:2427
-11074:0:4365
-11075:2:1451
-11076:0:4365
-11077:3:2428
-11078:0:4365
-11079:2:1652
-11080:0:4365
-11081:2:1653
-11082:0:4365
-11083:2:1657
-11084:0:4365
-11085:2:1660
-11086:0:4365
-11087:3:2427
-11088:0:4365
-11089:2:1665
-11090:2:1669
-11091:2:1670
-11092:2:1678
-11093:2:1679
-11094:2:1683
-11095:2:1684
-11096:2:1678
-11097:2:1679
-11098:2:1680
-11099:2:1692
-11100:2:1697
-11101:2:1701
-11102:2:1702
-11103:2:1709
-11104:2:1710
-11105:2:1721
-11106:2:1722
-11107:2:1723
-11108:2:1721
-11109:2:1722
-11110:2:1723
-11111:2:1734
-11112:2:1739
-11113:2:1740
-11114:0:4365
-11115:3:2428
-11116:0:4365
-11117:2:1752
-11118:0:4365
-11119:3:2427
-11120:0:4365
-11121:2:1754
-11122:0:4365
-11123:3:2428
-11124:0:4365
-11125:2:1755
-11126:2:1759
-11127:2:1760
-11128:2:1768
-11129:2:1769
-11130:2:1773
-11131:2:1774
-11132:2:1768
-11133:2:1769
-11134:2:1773
-11135:2:1774
-11136:2:1782
-11137:2:1787
-11138:2:1791
-11139:2:1792
-11140:2:1799
-11141:2:1800
-11142:2:1811
-11143:2:1812
-11144:2:1813
-11145:2:1811
-11146:2:1812
-11147:2:1813
-11148:2:1824
-11149:2:1829
-11150:2:1830
-11151:0:4365
-11152:2:1842
-11153:0:4365
-11154:3:2427
-11155:0:4365
-11156:2:1844
-11157:0:4363
-11158:3:2428
-11159:0:4369
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_mb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-pan: claim violated! (at depth 2071)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 72 byte, depth reached 5140, errors: 1
- 264561 states, stored
- 3902374 states, matched
- 4166935 transitions (= stored+matched)
- 15172302 atomic steps
-hash conflicts: 196282 (resolved)
-
-Stats on memory usage (in Megabytes):
- 25.231 equivalent memory usage for states (stored*(State-vector + overhead))
- 16.681 actual memory usage for states (compression: 66.12%)
- state-vector as stored = 38 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 482.365 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 151, "(1)"
- line 419, "pan.___", state 181, "(1)"
- line 400, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 242, "(1)"
- line 419, "pan.___", state 272, "(1)"
- line 400, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 331, "(1)"
- line 409, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 360, "(1)"
- line 419, "pan.___", state 390, "(1)"
- line 541, "pan.___", state 414, "-end-"
- (18 of 414 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 421, "pan.___", state 97, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 410, "pan.___", state 153, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 400, "pan.___", state 209, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 223, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 254, "(1)"
- line 414, "pan.___", state 267, "(1)"
- line 400, "pan.___", state 300, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 314, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 345, "(1)"
- line 414, "pan.___", state 358, "(1)"
- line 400, "pan.___", state 395, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 409, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 440, "(1)"
- line 414, "pan.___", state 453, "(1)"
- line 400, "pan.___", state 488, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 502, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 533, "(1)"
- line 414, "pan.___", state 546, "(1)"
- line 400, "pan.___", state 582, "(1)"
- line 404, "pan.___", state 594, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 638, "(1)"
- line 404, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 731, "(1)"
- line 404, "pan.___", state 777, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 795, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 821, "(1)"
- line 419, "pan.___", state 838, "(1)"
- line 404, "pan.___", state 868, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 886, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 912, "(1)"
- line 419, "pan.___", state 929, "(1)"
- line 404, "pan.___", state 963, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 981, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1007, "(1)"
- line 419, "pan.___", state 1024, "(1)"
- line 400, "pan.___", state 1050, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1053, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1053, "else"
- line 400, "pan.___", state 1056, "(1)"
- line 404, "pan.___", state 1064, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1066, "(1)"
- line 404, "pan.___", state 1067, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1067, "else"
- line 404, "pan.___", state 1070, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 404, "pan.___", state 1071, "(1)"
- line 402, "pan.___", state 1076, "((i<1))"
- line 402, "pan.___", state 1076, "((i>=1))"
- line 409, "pan.___", state 1082, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1095, "(1)"
- line 410, "pan.___", state 1096, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1096, "else"
- line 410, "pan.___", state 1099, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 410, "pan.___", state 1100, "(1)"
- line 414, "pan.___", state 1108, "(1)"
- line 414, "pan.___", state 1109, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1109, "else"
- line 414, "pan.___", state 1112, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 414, "pan.___", state 1113, "(1)"
- line 412, "pan.___", state 1118, "((i<1))"
- line 412, "pan.___", state 1118, "((i>=1))"
- line 419, "pan.___", state 1125, "(1)"
- line 419, "pan.___", state 1126, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1126, "else"
- line 419, "pan.___", state 1129, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 419, "pan.___", state 1130, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 421, "pan.___", state 1133, "(1)"
- line 404, "pan.___", state 1164, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1208, "(1)"
- line 404, "pan.___", state 1254, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1298, "(1)"
- line 400, "pan.___", state 1334, "(1)"
- line 404, "pan.___", state 1346, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1390, "(1)"
- line 404, "pan.___", state 1439, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1483, "(1)"
- line 404, "pan.___", state 1529, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1547, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1573, "(1)"
- line 419, "pan.___", state 1590, "(1)"
- line 404, "pan.___", state 1620, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1638, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1664, "(1)"
- line 419, "pan.___", state 1681, "(1)"
- line 404, "pan.___", state 1715, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1733, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1759, "(1)"
- line 419, "pan.___", state 1776, "(1)"
- line 400, "pan.___", state 1802, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1804, "(1)"
- line 400, "pan.___", state 1805, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1805, "else"
- line 400, "pan.___", state 1808, "(1)"
- line 404, "pan.___", state 1816, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1818, "(1)"
- line 404, "pan.___", state 1819, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1819, "else"
- line 404, "pan.___", state 1822, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 404, "pan.___", state 1823, "(1)"
- line 402, "pan.___", state 1828, "((i<1))"
- line 402, "pan.___", state 1828, "((i>=1))"
- line 409, "pan.___", state 1834, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1847, "(1)"
- line 410, "pan.___", state 1848, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1848, "else"
- line 410, "pan.___", state 1851, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 410, "pan.___", state 1852, "(1)"
- line 414, "pan.___", state 1860, "(1)"
- line 414, "pan.___", state 1861, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1861, "else"
- line 414, "pan.___", state 1864, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 414, "pan.___", state 1865, "(1)"
- line 412, "pan.___", state 1870, "((i<1))"
- line 412, "pan.___", state 1870, "((i>=1))"
- line 419, "pan.___", state 1877, "(1)"
- line 419, "pan.___", state 1878, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1878, "else"
- line 419, "pan.___", state 1881, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 419, "pan.___", state 1882, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 421, "pan.___", state 1885, "(1)"
- line 404, "pan.___", state 1916, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1960, "(1)"
- line 404, "pan.___", state 2007, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2051, "(1)"
- line 404, "pan.___", state 2102, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 2146, "(1)"
- line 703, "pan.___", state 2192, "-end-"
- (144 of 2192 states)
-unreached in proctype :init:
- line 710, "pan.___", state 9, "((j<2))"
- line 710, "pan.___", state 9, "((j>=2))"
- line 711, "pan.___", state 20, "((j<2))"
- line 711, "pan.___", state 20, "((j>=2))"
- line 716, "pan.___", state 33, "((j<2))"
- line 716, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 750, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 3.37 seconds
-pan: rate 78504.748 states/second
-pan: avg transition delay 8.0875e-07 usec
-cp .input.spin urcu_free_no_mb.spin.input
-cp .input.spin.trail urcu_free_no_mb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2654
-2:3:2606
-3:3:2609
-4:3:2609
-5:3:2612
-6:3:2620
-7:3:2620
-8:3:2623
-9:3:2629
-10:3:2633
-11:3:2633
-12:3:2636
-13:3:2644
-14:3:2648
-15:3:2649
-16:0:2654
-17:3:2651
-18:0:2654
-19:2:416
-20:0:2654
-21:2:422
-22:0:2654
-23:2:423
-24:0:2654
-25:2:424
-26:2:428
-27:2:429
-28:2:437
-29:2:438
-30:2:442
-31:2:443
-32:2:451
-33:2:456
-34:2:460
-35:2:461
-36:2:468
-37:2:469
-38:2:480
-39:2:481
-40:2:482
-41:2:493
-42:2:498
-43:2:499
-44:0:2654
-45:2:511
-46:0:2654
-47:2:513
-48:2:514
-49:0:2654
-50:2:518
-51:2:522
-52:2:523
-53:2:531
-54:2:532
-55:2:536
-56:2:537
-57:2:545
-58:2:550
-59:2:551
-60:2:562
-61:2:563
-62:2:574
-63:2:575
-64:2:576
-65:2:587
-66:2:592
-67:2:593
-68:0:2654
-69:2:605
-70:0:2654
-71:2:607
-72:0:2654
-73:2:608
-74:0:2654
-75:2:618
-76:0:2654
-77:2:619
-78:2:623
-79:2:624
-80:2:632
-81:2:633
-82:2:637
-83:2:638
-84:2:646
-85:2:651
-86:2:655
-87:2:656
-88:2:663
-89:2:664
-90:2:675
-91:2:676
-92:2:677
-93:2:688
-94:2:693
-95:2:694
-96:0:2654
-97:2:709
-98:0:2654
-99:2:710
-100:2:714
-101:2:715
-102:2:723
-103:2:724
-104:2:728
-105:2:729
-106:2:737
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-1869:2:2330
-1870:2:2331
-1871:2:2339
-1872:2:2352
-1873:2:2353
-1874:2:2356
-1875:2:2357
-1876:2:2368
-1877:2:2369
-1878:2:2370
-1879:2:2381
-1880:2:2386
-1881:2:2389
-1882:2:2390
-1883:0:2654
-1884:2:2402
-1885:0:2654
-1886:2:2403
-1887:2:2407
-1888:2:2408
-1889:2:2416
-1890:2:2417
-1891:2:2421
-1892:2:2422
-1893:2:2430
-1894:2:2443
-1895:2:2444
-1896:2:2447
-1897:2:2448
-1898:2:2459
-1899:2:2460
-1900:2:2461
-1901:2:2472
-1902:2:2477
-1903:2:2480
-1904:2:2481
-1905:0:2654
-1906:2:2493
-1907:0:2654
-1908:2:2498
-1909:2:2502
-1910:2:2503
-1911:2:2511
-1912:2:2512
-1913:2:2516
-1914:2:2517
-1915:2:2525
-1916:2:2538
-1917:2:2539
-1918:2:2542
-1919:2:2543
-1920:2:2554
-1921:2:2555
-1922:2:2556
-1923:2:2567
-1924:2:2572
-1925:2:2575
-1926:2:2576
-1927:0:2654
-1928:2:2588
-1929:0:2654
-1930:2:2590
-1931:0:2654
-1932:2:2591
-1933:0:2654
-1934:2:2594
-1935:0:2654
-1936:2:2599
-1937:0:2654
-1938:1:2
-1939:0:2654
-1940:2:2600
-1941:0:2654
-1942:1:8
-1943:0:2654
-1944:2:2599
-1945:0:2654
-1946:1:9
-1947:0:2654
-1948:2:2600
-1949:0:2654
-1950:1:10
-1951:0:2654
-1952:2:2599
-1953:0:2654
-1954:1:11
-1955:0:2654
-1956:2:2600
-1957:0:2654
-1958:1:12
-1959:1:16
-1960:1:17
-1961:1:25
-1962:1:26
-1963:1:30
-1964:1:31
-1965:1:39
-1966:1:44
-1967:1:48
-1968:1:49
-1969:1:56
-1970:1:57
-1971:1:68
-1972:1:69
-1973:1:70
-1974:1:81
-1975:1:86
-1976:1:87
-1977:0:2654
-1978:2:2599
-1979:0:2654
-1980:1:99
-1981:0:2654
-1982:2:2600
-1983:0:2654
-1984:1:101
-1985:0:2654
-1986:2:2599
-1987:0:2654
-1988:1:102
-1989:1:106
-1990:1:107
-1991:1:115
-1992:1:116
-1993:1:120
-1994:1:121
-1995:1:129
-1996:1:134
-1997:1:138
-1998:1:139
-1999:1:146
-2000:1:147
-2001:1:158
-2002:1:159
-2003:1:160
-2004:1:171
-2005:1:176
-2006:1:177
-2007:0:2654
-2008:2:2600
-2009:0:2654
-2010:1:189
-2011:0:2654
-2012:2:2599
-2013:0:2654
-2014:1:191
-2015:0:2654
-2016:2:2600
-2017:0:2654
-2018:1:192
-2019:0:2654
-2020:2:2599
-2021:0:2654
-2022:1:193
-2023:1:197
-2024:1:198
-2025:1:206
-2026:1:207
-2027:1:211
-2028:1:212
-2029:1:220
-2030:1:225
-2031:1:229
-2032:1:230
-2033:1:237
-2034:1:238
-2035:1:249
-2036:1:250
-2037:1:251
-2038:1:262
-2039:1:267
-2040:1:268
-2041:0:2654
-2042:2:2600
-2043:0:2654
-2044:1:280
-2045:0:2654
-2046:2:2599
-2047:0:2654
-2048:1:282
-2049:0:2654
-2050:2:2600
-2051:0:2654
-2052:1:291
-2053:0:2654
-2054:2:2599
-2055:0:2654
-2056:1:293
-2057:0:2654
-2058:2:2600
-2059:0:2654
-2060:1:296
-2061:0:2654
-2062:2:2599
-2063:0:2654
-2064:1:301
-2065:0:2654
-2066:2:2600
-2067:0:2654
-2068:1:302
-2069:0:2652
-2070:2:2599
-2071:0:2658
-2072:0:2654
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_rmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1726)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3264, errors: 1
- 229629 states, stored
- 2119227 states, matched
- 2348856 transitions (= stored+matched)
- 8294746 atomic steps
-hash conflicts: 96242 (resolved)
-
-Stats on memory usage (in Megabytes):
- 18.395 equivalent memory usage for states (stored*(State-vector + overhead))
- 14.410 actual memory usage for states (compression: 78.34%)
- state-vector as stored = 38 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 480.119 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 243, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 265, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 282, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 291, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 304, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 320, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 334, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 352, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 365, "(1)"
- line 413, "pan.___", state 378, "(1)"
- line 418, "pan.___", state 395, "(1)"
- line 399, "pan.___", state 414, "(1)"
- line 403, "pan.___", state 426, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 444, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 470, "(1)"
- line 418, "pan.___", state 487, "(1)"
- line 403, "pan.___", state 519, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 537, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 563, "(1)"
- line 418, "pan.___", state 580, "(1)"
- line 179, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 616, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 629, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 651, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 668, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 677, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 690, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 714, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 716, "(1)"
- line 399, "pan.___", state 717, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 717, "else"
- line 399, "pan.___", state 720, "(1)"
- line 403, "pan.___", state 728, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 730, "(1)"
- line 403, "pan.___", state 731, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 731, "else"
- line 403, "pan.___", state 734, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 403, "pan.___", state 735, "(1)"
- line 401, "pan.___", state 740, "((i<1))"
- line 401, "pan.___", state 740, "((i>=1))"
- line 408, "pan.___", state 746, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 759, "(1)"
- line 409, "pan.___", state 760, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 760, "else"
- line 409, "pan.___", state 763, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 409, "pan.___", state 764, "(1)"
- line 413, "pan.___", state 772, "(1)"
- line 413, "pan.___", state 773, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 773, "else"
- line 413, "pan.___", state 776, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 413, "pan.___", state 777, "(1)"
- line 411, "pan.___", state 782, "((i<1))"
- line 411, "pan.___", state 782, "((i>=1))"
- line 418, "pan.___", state 789, "(1)"
- line 418, "pan.___", state 790, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 790, "else"
- line 418, "pan.___", state 793, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 418, "pan.___", state 794, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 420, "pan.___", state 797, "(1)"
- line 403, "pan.___", state 828, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 846, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 872, "(1)"
- line 418, "pan.___", state 889, "(1)"
- line 403, "pan.___", state 918, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 936, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 979, "(1)"
- line 399, "pan.___", state 998, "(1)"
- line 403, "pan.___", state 1010, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1028, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1054, "(1)"
- line 418, "pan.___", state 1071, "(1)"
- line 403, "pan.___", state 1103, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1121, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1147, "(1)"
- line 418, "pan.___", state 1164, "(1)"
- line 179, "pan.___", state 1187, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1200, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 1213, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1235, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1252, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1261, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1298, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1300, "(1)"
- line 399, "pan.___", state 1301, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1301, "else"
- line 399, "pan.___", state 1304, "(1)"
- line 403, "pan.___", state 1312, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1314, "(1)"
- line 403, "pan.___", state 1315, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1315, "else"
- line 403, "pan.___", state 1318, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 403, "pan.___", state 1319, "(1)"
- line 401, "pan.___", state 1324, "((i<1))"
- line 401, "pan.___", state 1324, "((i>=1))"
- line 408, "pan.___", state 1330, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1343, "(1)"
- line 409, "pan.___", state 1344, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1344, "else"
- line 409, "pan.___", state 1347, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 409, "pan.___", state 1348, "(1)"
- line 413, "pan.___", state 1356, "(1)"
- line 413, "pan.___", state 1357, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1357, "else"
- line 413, "pan.___", state 1360, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 413, "pan.___", state 1361, "(1)"
- line 411, "pan.___", state 1366, "((i<1))"
- line 411, "pan.___", state 1366, "((i>=1))"
- line 418, "pan.___", state 1373, "(1)"
- line 418, "pan.___", state 1374, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1374, "else"
- line 418, "pan.___", state 1377, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 418, "pan.___", state 1378, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 420, "pan.___", state 1381, "(1)"
- line 179, "pan.___", state 1406, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1419, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 175, "pan.___", state 1432, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1454, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 175, "pan.___", state 1471, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1480, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1493, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 702, "pan.___", state 1520, "-end-"
- (144 of 1520 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 1.88 seconds
-pan: rate 122143.09 states/second
-pan: avg transition delay 8.0039e-07 usec
-cp .input.spin urcu_free_no_rmb.spin.input
-cp .input.spin.trail urcu_free_no_rmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_RMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:1982
-2:3:1934
-3:3:1937
-4:3:1937
-5:3:1940
-6:3:1948
-7:3:1948
-8:3:1951
-9:3:1957
-10:3:1961
-11:3:1961
-12:3:1964
-13:3:1972
-14:3:1976
-15:3:1977
-16:0:1982
-17:3:1979
-18:0:1982
-19:2:416
-20:0:1982
-21:2:422
-22:0:1982
-23:2:423
-24:0:1982
-25:2:424
-26:2:428
-27:2:429
-28:2:437
-29:2:438
-30:2:442
-31:2:443
-32:2:451
-33:2:456
-34:2:460
-35:2:461
-36:2:468
-37:2:469
-38:2:480
-39:2:481
-40:2:482
-41:2:493
-42:2:498
-43:2:499
-44:0:1982
-45:2:511
-46:0:1982
-47:2:513
-48:2:514
-49:0:1982
-50:2:518
-51:2:522
-52:2:523
-53:2:531
-54:2:532
-55:2:536
-56:2:537
-57:2:545
-58:2:550
-59:2:551
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+++ /dev/null
-#define NO_WMB
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_no_wmb.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1614)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 2823, errors: 1
- 81228 states, stored
- 752552 states, matched
- 833780 transitions (= stored+matched)
- 2934533 atomic steps
-hash conflicts: 10835 (resolved)
-
-Stats on memory usage (in Megabytes):
- 6.507 equivalent memory usage for states (stored*(State-vector + overhead))
- 5.330 actual memory usage for states (compression: 81.92%)
- state-vector as stored = 41 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 471.037 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 331, "(1)"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (18 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 20, "(1)"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 34, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 403, "pan.___", state 35, "(1)"
- line 401, "pan.___", state 40, "((i<1))"
- line 401, "pan.___", state 40, "((i>=1))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 409, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 60, "else"
- line 409, "pan.___", state 63, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 409, "pan.___", state 64, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 413, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 73, "else"
- line 413, "pan.___", state 76, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 413, "pan.___", state 77, "(1)"
- line 411, "pan.___", state 82, "((i<1))"
- line 411, "pan.___", state 82, "((i>=1))"
- line 418, "pan.___", state 89, "(1)"
- line 418, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 90, "else"
- line 418, "pan.___", state 93, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 418, "pan.___", state 94, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 420, "pan.___", state 97, "(1)"
- line 369, "pan.___", state 99, "(1)"
- line 639, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 637, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 114, "(1)"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 128, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 403, "pan.___", state 129, "(1)"
- line 401, "pan.___", state 134, "((i<1))"
- line 401, "pan.___", state 134, "((i>=1))"
- line 409, "pan.___", state 153, "(1)"
- line 409, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 154, "else"
- line 409, "pan.___", state 157, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 409, "pan.___", state 158, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 413, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 167, "else"
- line 413, "pan.___", state 170, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 413, "pan.___", state 171, "(1)"
- line 411, "pan.___", state 176, "((i<1))"
- line 411, "pan.___", state 176, "((i>=1))"
- line 418, "pan.___", state 183, "(1)"
- line 418, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 184, "else"
- line 418, "pan.___", state 187, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 418, "pan.___", state 188, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 420, "pan.___", state 191, "(1)"
- line 369, "pan.___", state 193, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 646, "pan.___", state 202, "((write_lock==0))"
- line 646, "pan.___", state 202, "else"
- line 644, "pan.___", state 203, "(1)"
- line 160, "pan.___", state 209, "(1)"
- line 164, "pan.___", state 217, "(1)"
- line 164, "pan.___", state 218, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 164, "pan.___", state 218, "else"
- line 162, "pan.___", state 223, "((j<1))"
- line 162, "pan.___", state 223, "((j>=1))"
- line 168, "pan.___", state 229, "(1)"
- line 168, "pan.___", state 230, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 168, "pan.___", state 230, "else"
- line 160, "pan.___", state 241, "(1)"
- line 168, "pan.___", state 261, "(1)"
- line 160, "pan.___", state 277, "(1)"
- line 164, "pan.___", state 285, "(1)"
- line 168, "pan.___", state 297, "(1)"
- line 399, "pan.___", state 311, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 325, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 343, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 356, "(1)"
- line 413, "pan.___", state 369, "(1)"
- line 418, "pan.___", state 386, "(1)"
- line 399, "pan.___", state 405, "(1)"
- line 403, "pan.___", state 417, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 435, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 461, "(1)"
- line 418, "pan.___", state 478, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 164, "pan.___", state 594, "(1)"
- line 168, "pan.___", state 606, "(1)"
- line 160, "pan.___", state 618, "(1)"
- line 168, "pan.___", state 638, "(1)"
- line 164, "pan.___", state 662, "(1)"
- line 168, "pan.___", state 674, "(1)"
- line 399, "pan.___", state 696, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 698, "(1)"
- line 399, "pan.___", state 699, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 699, "else"
- line 399, "pan.___", state 702, "(1)"
- line 403, "pan.___", state 710, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 712, "(1)"
- line 403, "pan.___", state 713, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 713, "else"
- line 403, "pan.___", state 716, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 403, "pan.___", state 717, "(1)"
- line 401, "pan.___", state 722, "((i<1))"
- line 401, "pan.___", state 722, "((i>=1))"
- line 408, "pan.___", state 728, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 741, "(1)"
- line 409, "pan.___", state 742, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 742, "else"
- line 409, "pan.___", state 745, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 409, "pan.___", state 746, "(1)"
- line 413, "pan.___", state 754, "(1)"
- line 413, "pan.___", state 755, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 755, "else"
- line 413, "pan.___", state 758, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 413, "pan.___", state 759, "(1)"
- line 411, "pan.___", state 764, "((i<1))"
- line 411, "pan.___", state 764, "((i>=1))"
- line 418, "pan.___", state 771, "(1)"
- line 418, "pan.___", state 772, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 772, "else"
- line 418, "pan.___", state 775, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 418, "pan.___", state 776, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 420, "pan.___", state 779, "(1)"
- line 403, "pan.___", state 810, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 828, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 854, "(1)"
- line 418, "pan.___", state 871, "(1)"
- line 403, "pan.___", state 900, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 918, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 944, "(1)"
- line 418, "pan.___", state 961, "(1)"
- line 399, "pan.___", state 980, "(1)"
- line 403, "pan.___", state 992, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1010, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1036, "(1)"
- line 418, "pan.___", state 1053, "(1)"
- line 403, "pan.___", state 1085, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1103, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1129, "(1)"
- line 418, "pan.___", state 1146, "(1)"
- line 164, "pan.___", state 1169, "(1)"
- line 168, "pan.___", state 1181, "(1)"
- line 160, "pan.___", state 1193, "(1)"
- line 168, "pan.___", state 1213, "(1)"
- line 164, "pan.___", state 1237, "(1)"
- line 168, "pan.___", state 1249, "(1)"
- line 399, "pan.___", state 1271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1273, "(1)"
- line 399, "pan.___", state 1274, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1274, "else"
- line 399, "pan.___", state 1277, "(1)"
- line 403, "pan.___", state 1285, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1287, "(1)"
- line 403, "pan.___", state 1288, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1288, "else"
- line 403, "pan.___", state 1291, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 403, "pan.___", state 1292, "(1)"
- line 401, "pan.___", state 1297, "((i<1))"
- line 401, "pan.___", state 1297, "((i>=1))"
- line 408, "pan.___", state 1303, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1316, "(1)"
- line 409, "pan.___", state 1317, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1317, "else"
- line 409, "pan.___", state 1320, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 409, "pan.___", state 1321, "(1)"
- line 413, "pan.___", state 1329, "(1)"
- line 413, "pan.___", state 1330, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1330, "else"
- line 413, "pan.___", state 1333, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 413, "pan.___", state 1334, "(1)"
- line 411, "pan.___", state 1339, "((i<1))"
- line 411, "pan.___", state 1339, "((i>=1))"
- line 418, "pan.___", state 1346, "(1)"
- line 418, "pan.___", state 1347, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1347, "else"
- line 418, "pan.___", state 1350, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 418, "pan.___", state 1351, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 420, "pan.___", state 1354, "(1)"
- line 164, "pan.___", state 1379, "(1)"
- line 168, "pan.___", state 1391, "(1)"
- line 160, "pan.___", state 1403, "(1)"
- line 168, "pan.___", state 1423, "(1)"
- line 164, "pan.___", state 1447, "(1)"
- line 168, "pan.___", state 1459, "(1)"
- line 702, "pan.___", state 1484, "-end-"
- (160 of 1484 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.66 seconds
-pan: rate 123072.73 states/second
-pan: avg transition delay 7.9158e-07 usec
-cp .input.spin urcu_free_no_wmb.spin.input
-cp .input.spin.trail urcu_free_no_wmb.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define NO_WMB
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
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-1408:2:808
-1409:0:1946
-1410:2:810
-1411:0:1946
-1412:2:813
-1413:2:814
-1414:2:826
-1415:2:827
-1416:2:831
-1417:2:832
-1418:2:840
-1419:2:845
-1420:2:849
-1421:2:850
-1422:2:857
-1423:2:858
-1424:2:869
-1425:2:870
-1426:2:871
-1427:2:882
-1428:2:887
-1429:2:888
-1430:0:1946
-1431:2:900
-1432:0:1946
-1433:2:902
-1434:0:1946
-1435:2:903
-1436:0:1946
-1437:2:904
-1438:0:1946
-1439:2:905
-1440:0:1946
-1441:2:906
-1442:2:910
-1443:2:911
-1444:2:919
-1445:2:920
-1446:2:924
-1447:2:925
-1448:2:933
-1449:2:938
-1450:2:942
-1451:2:943
-1452:2:950
-1453:2:951
-1454:2:962
-1455:2:963
-1456:2:964
-1457:2:975
-1458:2:980
-1459:2:981
-1460:0:1946
-1461:2:993
-1462:0:1946
-1463:2:1097
-1464:0:1946
-1465:2:1195
-1466:0:1946
-1467:2:1196
-1468:0:1946
-1469:2:1200
-1470:0:1946
-1471:2:1206
-1472:2:1210
-1473:2:1211
-1474:2:1219
-1475:2:1220
-1476:2:1224
-1477:2:1225
-1478:2:1233
-1479:2:1238
-1480:2:1242
-1481:2:1243
-1482:2:1250
-1483:2:1251
-1484:2:1262
-1485:2:1263
-1486:2:1264
-1487:2:1275
-1488:2:1280
-1489:2:1281
-1490:0:1946
-1491:2:1293
-1492:0:1946
-1493:2:1295
-1494:0:1946
-1495:2:1296
-1496:2:1300
-1497:2:1301
-1498:2:1309
-1499:2:1310
-1500:2:1314
-1501:2:1315
-1502:2:1323
-1503:2:1328
-1504:2:1332
-1505:2:1333
-1506:2:1340
-1507:2:1341
-1508:2:1352
-1509:2:1353
-1510:2:1354
-1511:2:1365
-1512:2:1370
-1513:2:1371
-1514:0:1946
-1515:2:1383
-1516:0:1946
-1517:2:1385
-1518:0:1946
-1519:2:1388
-1520:2:1389
-1521:2:1401
-1522:2:1402
-1523:2:1406
-1524:2:1407
-1525:2:1415
-1526:2:1420
-1527:2:1424
-1528:2:1425
-1529:2:1432
-1530:2:1433
-1531:2:1444
-1532:2:1445
-1533:2:1446
-1534:2:1457
-1535:2:1462
-1536:2:1463
-1537:0:1946
-1538:2:1475
-1539:0:1946
-1540:2:1477
-1541:0:1946
-1542:2:1478
-1543:0:1946
-1544:2:1479
-1545:0:1946
-1546:2:1480
-1547:0:1946
-1548:2:1481
-1549:2:1485
-1550:2:1486
-1551:2:1494
-1552:2:1495
-1553:2:1499
-1554:2:1500
-1555:2:1508
-1556:2:1513
-1557:2:1517
-1558:2:1518
-1559:2:1525
-1560:2:1526
-1561:2:1537
-1562:2:1538
-1563:2:1539
-1564:2:1550
-1565:2:1555
-1566:2:1556
-1567:0:1946
-1568:2:1568
-1569:0:1946
-1570:2:1672
-1571:0:1946
-1572:2:1770
-1573:0:1946
-1574:2:1771
-1575:0:1946
-1576:2:1775
-1577:0:1946
-1578:2:1781
-1579:2:1788
-1580:2:1789
-1581:2:1796
-1582:2:1801
-1583:0:1946
-1584:2:1812
-1585:0:1946
-1586:2:1813
-1587:2:1820
-1588:2:1823
-1589:2:1824
-1590:2:1828
-1591:2:1833
-1592:0:1946
-1593:2:1844
-1594:0:1946
-1595:2:1849
-1596:2:1856
-1597:2:1857
-1598:2:1864
-1599:2:1869
-1600:0:1946
-1601:2:1880
-1602:0:1946
-1603:2:1882
-1604:0:1946
-1605:2:1883
-1606:0:1946
-1607:2:1886
-1608:0:1946
-1609:2:1891
-1610:0:1946
-1611:1:302
-1612:0:1944
-1613:2:1892
-1614:0:1950
-1615:1:244
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define >> pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_free.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_free_single_flip.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-pan: claim violated! (at depth 1316)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness disabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 2045, errors: 1
- 52434 states, stored
- 479392 states, matched
- 531826 transitions (= stored+matched)
- 1926196 atomic steps
-hash conflicts: 6594 (resolved)
-
-Stats on memory usage (in Megabytes):
- 4.200 equivalent memory usage for states (stored*(State-vector + overhead))
- 3.608 actual memory usage for states (compression: 85.89%)
- state-vector as stored = 44 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 469.279 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 179, "pan.___", state 990, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1003, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1013, "(1)"
- line 164, "pan.___", state 1021, "(1)"
- line 168, "pan.___", state 1033, "(1)"
- line 175, "pan.___", state 1044, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1066, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1076, "(1)"
- line 164, "pan.___", state 1084, "(1)"
- line 168, "pan.___", state 1096, "(1)"
- line 175, "pan.___", state 1111, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1120, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1133, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1143, "(1)"
- line 164, "pan.___", state 1151, "(1)"
- line 168, "pan.___", state 1163, "(1)"
- line 702, "pan.___", state 1188, "-end-"
- (100 of 1188 states)
-unreached in proctype :init:
- line 709, "pan.___", state 9, "((j<2))"
- line 709, "pan.___", state 9, "((j>=2))"
- line 710, "pan.___", state 20, "((j<2))"
- line 710, "pan.___", state 20, "((j>=2))"
- line 715, "pan.___", state 33, "((j<2))"
- line 715, "pan.___", state 33, "((j>=2))"
- (3 of 46 states)
-unreached in proctype :never:
- line 749, "pan.___", state 8, "-end-"
- (1 of 8 states)
-
-pan: elapsed time 0.43 seconds
-pan: rate 121939.53 states/second
-pan: avg transition delay 8.0854e-07 usec
-cp .input.spin urcu_free_single_flip.spin.input
-cp .input.spin.trail urcu_free_single_flip.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define SINGLE_FLIP
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
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-3:3:1605
-4:3:1605
-5:3:1608
-6:3:1616
-7:3:1616
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-9:3:1625
-10:3:1629
-11:3:1629
-12:3:1632
-13:3:1640
-14:3:1644
-15:3:1645
-16:0:1650
-17:3:1647
-18:0:1650
-19:2:416
-20:0:1650
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-22:0:1650
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-27:2:429
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-29:2:438
-30:2:442
-31:2:443
-32:2:451
-33:2:456
-34:2:460
-35:2:461
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-40:2:482
-41:2:493
-42:2:498
-43:2:499
-44:0:1650
-45:2:511
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-47:2:513
-48:2:514
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-50:2:518
-51:2:522
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-53:2:531
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-55:2:536
-56:2:537
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-58:2:550
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-61:2:563
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-85:2:650
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-89:2:670
-90:0:1650
-91:2:681
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-95:2:690
-96:2:694
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-109:2:752
-110:2:753
-111:2:757
-112:2:761
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-154:2:920
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-160:2:943
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-210:2:1395
-211:2:1396
-212:2:1400
-213:2:1404
-214:2:1405
-215:2:1409
-216:2:1417
-217:2:1418
-218:2:1423
-219:2:1430
-220:2:1431
-221:2:1438
-222:2:1443
-223:0:1650
-224:2:1454
-225:0:1650
-226:2:1458
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-228:2:1463
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-231:2:1472
-232:2:1480
-233:2:1481
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-238:2:1506
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-240:2:1517
-241:0:1650
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-243:2:1526
-244:2:1530
-245:2:1534
-246:2:1535
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-249:2:1548
-250:2:1553
-251:2:1560
-252:2:1561
-253:2:1568
-254:2:1573
-255:0:1650
-256:2:1584
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-258:2:1586
-259:0:1650
-260:2:1587
-261:0:1650
-262:2:423
-263:0:1650
-264:2:424
-265:2:428
-266:2:429
-267:2:437
-268:2:438
-269:2:442
-270:2:443
-271:2:451
-272:2:456
-273:2:460
-274:2:461
-275:2:468
-276:2:469
-277:2:480
-278:2:481
-279:2:482
-280:2:493
-281:2:498
-282:2:499
-283:0:1650
-284:2:511
-285:0:1650
-286:2:513
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-1216:0:1650
-1217:2:993
-1218:0:1650
-1219:2:995
-1220:0:1650
-1221:2:996
-1222:0:1650
-1223:2:997
-1224:0:1650
-1225:2:998
-1226:0:1650
-1227:2:999
-1228:2:1003
-1229:2:1004
-1230:2:1012
-1231:2:1013
-1232:2:1017
-1233:2:1018
-1234:2:1026
-1235:2:1031
-1236:2:1035
-1237:2:1036
-1238:2:1043
-1239:2:1044
-1240:2:1055
-1241:2:1056
-1242:2:1057
-1243:2:1068
-1244:2:1073
-1245:2:1074
-1246:0:1650
-1247:2:1086
-1248:0:1650
-1249:2:1283
-1250:0:1650
-1251:2:1381
-1252:0:1650
-1253:2:1382
-1254:0:1650
-1255:2:1386
-1256:0:1650
-1257:2:1395
-1258:2:1396
-1259:2:1400
-1260:2:1404
-1261:2:1405
-1262:2:1409
-1263:2:1417
-1264:2:1418
-1265:2:1423
-1266:2:1430
-1267:2:1431
-1268:2:1438
-1269:2:1443
-1270:0:1650
-1271:2:1454
-1272:0:1650
-1273:2:1458
-1274:2:1459
-1275:2:1463
-1276:2:1467
-1277:2:1468
-1278:2:1472
-1279:2:1480
-1280:2:1481
-1281:2:1486
-1282:2:1493
-1283:2:1494
-1284:2:1501
-1285:2:1506
-1286:0:1650
-1287:2:1517
-1288:0:1650
-1289:2:1525
-1290:2:1526
-1291:2:1530
-1292:2:1534
-1293:2:1535
-1294:2:1539
-1295:2:1547
-1296:2:1548
-1297:2:1553
-1298:2:1560
-1299:2:1561
-1300:2:1568
-1301:2:1573
-1302:0:1650
-1303:2:1584
-1304:0:1650
-1305:2:1586
-1306:0:1650
-1307:2:1587
-1308:0:1650
-1309:2:1590
-1310:0:1650
-1311:2:1595
-1312:0:1650
-1313:1:302
-1314:0:1648
-1315:2:1596
-1316:0:1654
-1317:1:34
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_reader.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 1767: Claim reached state 9 (line 748)
-Depth= 2582 States= 1e+06 Transitions= 1.91e+07 Memory= 498.674 t= 16.1 R= 6e+04
-Depth= 2582 States= 2e+06 Transitions= 3.89e+07 Memory= 531.096 t= 33 R= 6e+04
-Depth= 2582 States= 3e+06 Transitions= 5.89e+07 Memory= 563.518 t= 50.5 R= 6e+04
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 2582, errors: 0
- 1743405 states, stored (3.27749e+06 visited)
- 60942540 states, matched
- 64220033 transitions (= visited+matched)
-2.3877948e+08 atomic steps
-hash conflicts: 25318829 (resolved)
-
-Stats on memory usage (in Megabytes):
- 139.662 equivalent memory usage for states (stored*(State-vector + overhead))
- 113.924 actual memory usage for states (compression: 81.57%)
- state-vector as stored = 41 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 603.623 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 55.3 seconds
-pan: rate 59256.789 states/second
-pan: avg transition delay 8.6126e-07 usec
-cp .input.spin urcu_progress_reader.spin.input
-cp .input.spin.trail urcu_progress_reader.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define READER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:4:-2
--4:-4:-4
-1:0:4401
-2:4:4353
-3:4:4356
-4:4:4356
-5:4:4359
-6:4:4367
-7:4:4367
-8:4:4370
-9:4:4376
-10:4:4380
-11:4:4380
-12:4:4383
-13:4:4391
-14:4:4395
-15:4:4396
-16:0:4401
-17:4:4398
-18:0:4401
-19:3:2479
-20:0:4401
-21:3:2485
-22:0:4401
-23:3:2486
-24:0:4401
-25:3:2487
-26:3:2491
-27:3:2492
-28:3:2500
-29:3:2501
-30:3:2505
-31:3:2506
-32:3:2514
-33:3:2519
-34:3:2523
-35:3:2524
-36:3:2531
-37:3:2532
-38:3:2543
-39:3:2544
-40:3:2545
-41:3:2556
-42:3:2561
-43:3:2562
-44:0:4401
-45:3:2574
-46:0:4401
-47:3:2576
-48:3:2577
-49:0:4401
-50:3:2581
-51:3:2585
-52:3:2586
-53:3:2594
-54:3:2595
-55:3:2599
-56:3:2600
-57:3:2608
-58:3:2613
-59:3:2614
-60:3:2625
-61:3:2626
-62:3:2637
-63:3:2638
-64:3:2639
-65:3:2650
-66:3:2655
-67:3:2656
-68:0:4401
-69:3:2668
-70:0:4401
-71:3:2670
-72:0:4401
-73:3:2671
-74:0:4401
-75:3:2681
-76:0:4401
-77:3:2682
-78:0:4401
-79:3:2686
-80:3:2687
-81:3:2691
-82:3:2695
-83:3:2696
-84:3:2700
-85:3:2708
-86:3:2709
-87:3:2714
-88:3:2721
-89:3:2722
-90:3:2729
-91:3:2734
-92:0:4401
-93:3:2745
-94:0:4401
-95:3:2749
-96:3:2750
-97:3:2754
-98:3:2758
-99:3:2759
-100:3:2763
-101:3:2771
-102:3:2772
-103:3:2777
-104:3:2784
-105:3:2785
-106:3:2792
-107:3:2797
-108:0:4401
-109:3:2808
-110:0:4401
-111:3:2816
-112:3:2817
-113:3:2821
-114:3:2825
-115:3:2826
-116:3:2830
-117:3:2838
-118:3:2839
-119:3:2844
-120:3:2851
-121:3:2852
-122:3:2859
-123:3:2864
-124:0:4401
-125:3:2879
-126:0:4401
-127:3:2881
-128:0:4401
-129:3:2882
-130:3:2886
-131:3:2887
-132:3:2895
-133:3:2896
-134:3:2900
-135:3:2901
-136:3:2909
-137:3:2914
-138:3:2918
-139:3:2919
-140:3:2926
-141:3:2927
-142:3:2938
-143:3:2939
-144:3:2940
-145:3:2951
-146:3:2956
-147:3:2957
-148:0:4401
-149:3:2969
-150:0:4401
-151:3:2971
-152:0:4401
-153:3:2974
-154:3:2975
-155:3:2987
-156:3:2988
-157:3:2992
-158:3:2993
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-1051:3:4264
-1052:0:4401
-1053:3:4272
-1054:3:4273
-1055:3:4277
-1056:3:4281
-1057:3:4282
-1058:3:4286
-1059:3:4294
-1060:3:4295
-1061:3:4300
-1062:3:4307
-1063:3:4308
-1064:3:4315
-1065:3:4320
-1066:0:4401
-1067:3:4335
-1068:0:4401
-1069:3:4337
-1070:0:4401
-1071:3:4338
-1072:0:4401
-1073:3:4341
-1074:0:4401
-1075:3:4346
-1076:0:4401
-1077:2:1236
-1078:0:4401
-1079:3:4347
-1080:0:4401
-1081:2:1242
-1082:0:4401
-1083:3:4346
-1084:0:4401
-1085:2:1243
-1086:0:4401
-1087:3:4347
-1088:0:4401
-1089:2:1244
-1090:0:4401
-1091:3:4346
-1092:0:4401
-1093:2:1245
-1094:0:4401
-1095:3:4347
-1096:0:4401
-1097:1:2
-1098:0:4401
-1099:3:4346
-1100:0:4401
-1101:2:1246
-1102:0:4401
-1103:3:4347
-1104:0:4401
-1105:1:8
-1106:0:4401
-1107:3:4346
-1108:0:4401
-1109:2:1245
-1110:0:4401
-1111:3:4347
-1112:0:4401
-1113:1:9
-1114:0:4401
-1115:3:4346
-1116:0:4401
-1117:2:1246
-1118:0:4401
-1119:3:4347
-1120:0:4401
-1121:1:10
-1122:0:4401
-1123:3:4346
-1124:0:4401
-1125:2:1245
-1126:0:4401
-1127:3:4347
-1128:0:4401
-1129:1:11
-1130:0:4401
-1131:3:4346
-1132:0:4401
-1133:2:1246
-1134:0:4401
-1135:3:4347
-1136:0:4401
-1137:1:14
-1138:0:4401
-1139:3:4346
-1140:0:4401
-1141:2:1245
-1142:0:4401
-1143:3:4347
-1144:0:4401
-1145:1:15
-1146:0:4401
-1147:3:4346
-1148:0:4401
-1149:2:1246
-1150:0:4401
-1151:3:4347
-1152:0:4401
-1153:1:16
-1154:1:20
-1155:1:21
-1156:1:29
-1157:1:30
-1158:1:34
-1159:1:35
-1160:1:43
-1161:1:48
-1162:1:52
-1163:1:53
-1164:1:60
-1165:1:61
-1166:1:72
-1167:1:73
-1168:1:74
-1169:1:85
-1170:1:90
-1171:1:91
-1172:0:4401
-1173:3:4346
-1174:0:4401
-1175:2:1245
-1176:0:4401
-1177:3:4347
-1178:0:4401
-1179:1:103
-1180:0:4401
-1181:3:4346
-1182:0:4401
-1183:2:1246
-1184:0:4401
-1185:3:4347
-1186:0:4401
-1187:2:1247
-1188:0:4401
-1189:3:4346
-1190:0:4401
-1191:2:1253
-1192:0:4401
-1193:3:4347
-1194:0:4401
-1195:2:1254
-1196:0:4399
-1197:3:4346
-1198:0:4405
-1199:3:4347
-1200:0:4405
-1201:2:1257
-1202:0:4405
-1203:3:4346
-1204:0:4405
-1205:2:1258
-1206:0:4405
-1207:3:4347
-1208:0:4405
-1209:2:1259
-1210:2:1263
-1211:2:1264
-1212:2:1272
-1213:2:1273
-1214:2:1277
-1215:2:1278
-1216:2:1286
-1217:2:1291
-1218:2:1295
-1219:2:1296
-1220:2:1303
-1221:2:1304
-1222:2:1315
-1223:2:1316
-1224:2:1317
-1225:2:1328
-1226:2:1333
-1227:2:1334
-1228:0:4405
-1229:3:4346
-1230:0:4405
-1231:2:1346
-1232:0:4405
-1233:3:4347
-1234:0:4405
-1235:2:1347
-1236:0:4405
-1237:3:4346
-1238:0:4405
-1239:1:104
--1:-1:-1
-1240:0:4405
-1241:3:4347
-1242:0:4405
-1243:3:4346
-1244:0:4405
-1245:2:1348
-1246:0:4405
-1247:3:4347
-1248:0:4405
-1249:2:1347
-1250:0:4405
-1251:3:4346
-1252:0:4405
-1253:1:105
-1254:0:4405
-1255:3:4347
-1256:0:4405
-1257:3:4346
-1258:0:4405
-1259:2:1348
-1260:0:4405
-1261:3:4347
-1262:0:4405
-1263:2:1347
-1264:0:4405
-1265:3:4346
-1266:0:4405
-1267:1:104
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 744)
-depth 15: Claim reached state 9 (line 749)
-depth 205: Claim reached state 9 (line 748)
-Depth= 2535 States= 1e+06 Transitions= 1.7e+07 Memory= 489.885 t= 14.4 R= 7e+04
-Depth= 2535 States= 2e+06 Transitions= 3.76e+07 Memory= 523.186 t= 32 R= 6e+04
-Depth= 2535 States= 3e+06 Transitions= 5.78e+07 Memory= 555.901 t= 49.6 R= 6e+04
-pan: resizing hashtable to -w22.. done
-
-(Spin Version 5.1.7 -- 23 December 2008)
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 2535, errors: 0
- 1687360 states, stored (3.30264e+06 visited)
- 60975458 states, matched
- 64278093 transitions (= visited+matched)
-2.3918285e+08 atomic steps
-hash conflicts: 20728375 (resolved)
-
-Stats on memory usage (in Megabytes):
- 135.172 equivalent memory usage for states (stored*(State-vector + overhead))
- 110.532 actual memory usage for states (compression: 81.77%)
- state-vector as stored = 41 byte + 28 byte overhead
- 32.000 memory used for hash table (-w22)
- 457.764 memory used for DFS stack (-m10000000)
- 600.205 total actual memory usage
-
-unreached in proctype urcu_reader
- line 399, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 61, "(1)"
- line 418, "pan.___", state 91, "(1)"
- line 399, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 151, "(1)"
- line 418, "pan.___", state 181, "(1)"
- line 399, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 242, "(1)"
- line 418, "pan.___", state 272, "(1)"
- line 399, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 360, "(1)"
- line 418, "pan.___", state 390, "(1)"
- line 540, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 399, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 59, "(1)"
- line 413, "pan.___", state 72, "(1)"
- line 418, "pan.___", state 89, "(1)"
- line 399, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 153, "(1)"
- line 413, "pan.___", state 166, "(1)"
- line 652, "pan.___", state 199, "(1)"
- line 175, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 240, "(1)"
- line 164, "pan.___", state 248, "(1)"
- line 168, "pan.___", state 260, "(1)"
- line 175, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 303, "(1)"
- line 164, "pan.___", state 311, "(1)"
- line 168, "pan.___", state 323, "(1)"
- line 175, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 370, "(1)"
- line 164, "pan.___", state 378, "(1)"
- line 168, "pan.___", state 390, "(1)"
- line 399, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 449, "(1)"
- line 413, "pan.___", state 462, "(1)"
- line 418, "pan.___", state 479, "(1)"
- line 399, "pan.___", state 498, "(1)"
- line 403, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 554, "(1)"
- line 418, "pan.___", state 571, "(1)"
- line 403, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 647, "(1)"
- line 418, "pan.___", state 664, "(1)"
- line 179, "pan.___", state 687, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 700, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 710, "(1)"
- line 164, "pan.___", state 718, "(1)"
- line 168, "pan.___", state 730, "(1)"
- line 175, "pan.___", state 741, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 763, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 773, "(1)"
- line 164, "pan.___", state 781, "(1)"
- line 168, "pan.___", state 793, "(1)"
- line 175, "pan.___", state 808, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 817, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 830, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 840, "(1)"
- line 164, "pan.___", state 848, "(1)"
- line 168, "pan.___", state 860, "(1)"
- line 399, "pan.___", state 882, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 884, "(1)"
- line 399, "pan.___", state 885, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 885, "else"
- line 399, "pan.___", state 888, "(1)"
- line 403, "pan.___", state 896, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 898, "(1)"
- line 403, "pan.___", state 899, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 899, "else"
- line 403, "pan.___", state 902, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 403, "pan.___", state 903, "(1)"
- line 401, "pan.___", state 908, "((i<1))"
- line 401, "pan.___", state 908, "((i>=1))"
- line 408, "pan.___", state 914, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 927, "(1)"
- line 409, "pan.___", state 928, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 928, "else"
- line 409, "pan.___", state 931, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 409, "pan.___", state 932, "(1)"
- line 413, "pan.___", state 940, "(1)"
- line 413, "pan.___", state 941, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 941, "else"
- line 413, "pan.___", state 944, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 413, "pan.___", state 945, "(1)"
- line 411, "pan.___", state 950, "((i<1))"
- line 411, "pan.___", state 950, "((i>=1))"
- line 418, "pan.___", state 957, "(1)"
- line 418, "pan.___", state 958, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 958, "else"
- line 418, "pan.___", state 961, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 418, "pan.___", state 962, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 420, "pan.___", state 965, "(1)"
- line 403, "pan.___", state 996, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1014, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1040, "(1)"
- line 418, "pan.___", state 1057, "(1)"
- line 403, "pan.___", state 1086, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1104, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1130, "(1)"
- line 418, "pan.___", state 1147, "(1)"
- line 399, "pan.___", state 1166, "(1)"
- line 403, "pan.___", state 1178, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1196, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1222, "(1)"
- line 418, "pan.___", state 1239, "(1)"
- line 403, "pan.___", state 1271, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 408, "pan.___", state 1289, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 413, "pan.___", state 1315, "(1)"
- line 418, "pan.___", state 1332, "(1)"
- line 179, "pan.___", state 1355, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1368, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1378, "(1)"
- line 164, "pan.___", state 1386, "(1)"
- line 168, "pan.___", state 1398, "(1)"
- line 175, "pan.___", state 1409, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1431, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1441, "(1)"
- line 164, "pan.___", state 1449, "(1)"
- line 168, "pan.___", state 1461, "(1)"
- line 175, "pan.___", state 1476, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1485, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1498, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1508, "(1)"
- line 164, "pan.___", state 1516, "(1)"
- line 168, "pan.___", state 1528, "(1)"
- line 399, "pan.___", state 1550, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 399, "pan.___", state 1552, "(1)"
- line 399, "pan.___", state 1553, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 399, "pan.___", state 1553, "else"
- line 399, "pan.___", state 1556, "(1)"
- line 403, "pan.___", state 1564, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 403, "pan.___", state 1566, "(1)"
- line 403, "pan.___", state 1567, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 403, "pan.___", state 1567, "else"
- line 403, "pan.___", state 1570, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 403, "pan.___", state 1571, "(1)"
- line 401, "pan.___", state 1576, "((i<1))"
- line 401, "pan.___", state 1576, "((i>=1))"
- line 408, "pan.___", state 1582, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1595, "(1)"
- line 409, "pan.___", state 1596, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 409, "pan.___", state 1596, "else"
- line 409, "pan.___", state 1599, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 409, "pan.___", state 1600, "(1)"
- line 413, "pan.___", state 1608, "(1)"
- line 413, "pan.___", state 1609, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 413, "pan.___", state 1609, "else"
- line 413, "pan.___", state 1612, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 413, "pan.___", state 1613, "(1)"
- line 411, "pan.___", state 1618, "((i<1))"
- line 411, "pan.___", state 1618, "((i>=1))"
- line 418, "pan.___", state 1625, "(1)"
- line 418, "pan.___", state 1626, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 418, "pan.___", state 1626, "else"
- line 418, "pan.___", state 1629, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 418, "pan.___", state 1630, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 420, "pan.___", state 1633, "(1)"
- line 179, "pan.___", state 1658, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1671, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1681, "(1)"
- line 164, "pan.___", state 1689, "(1)"
- line 168, "pan.___", state 1701, "(1)"
- line 175, "pan.___", state 1712, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 183, "pan.___", state 1734, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 160, "pan.___", state 1744, "(1)"
- line 164, "pan.___", state 1752, "(1)"
- line 168, "pan.___", state 1764, "(1)"
- line 175, "pan.___", state 1779, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 179, "pan.___", state 1788, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 183, "pan.___", state 1801, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 160, "pan.___", state 1811, "(1)"
- line 164, "pan.___", state 1819, "(1)"
- line 168, "pan.___", state 1831, "(1)"
- line 702, "pan.___", state 1856, "-end-"
- (158 of 1856 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 751, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 55.4 seconds
-pan: rate 59582.086 states/second
-pan: avg transition delay 8.6235e-07 usec
-cp .input.spin urcu_progress_writer.spin.input
-cp .input.spin.trail urcu_progress_writer.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
--2:3:-2
--4:-4:-4
-1:0:2679
-2:1:2673
-3:1:2674
-4:1:2675
-5:1:2676
-6:0:2685
-7:5:1129
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
+++ /dev/null
-make[1]: Entering directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
-rm -f pan* trail.out .input.spin* *.spin.trail .input.define
-touch .input.define
-cat .input.define > pan.ltl
-cat DEFINES >> pan.ltl
-spin -f "!(`cat urcu_progress.ltl | grep -v ^//`)" >> pan.ltl
-cp urcu_progress_writer_error.define .input.define
-cat .input.define > .input.spin
-cat DEFINES >> .input.spin
-cat urcu.spin >> .input.spin
-rm -f .input.spin.trail
-spin -a -X -N pan.ltl .input.spin
-Exit-Status 0
-gcc -O2 -w -DHASH64 -o pan pan.c
-./pan -a -f -v -c1 -X -m10000000 -w20
-warning: for p.o. reduction to be valid the never claim must be stutter-invariant
-(never claims generated from LTL formulae are stutter-invariant)
-depth 0: Claim reached state 5 (line 745)
-depth 15: Claim reached state 9 (line 750)
-depth 205: Claim reached state 9 (line 749)
-pan: acceptance cycle (at depth 1651)
-pan: wrote .input.spin.trail
-
-(Spin Version 5.1.7 -- 23 December 2008)
-Warning: Search not completed
- + Partial Order Reduction
-
-Full statespace search for:
- never claim +
- assertion violations + (if within scope of claim)
- acceptance cycles + (fairness enabled)
- invalid end states - (disabled by never claim)
-
-State-vector 56 byte, depth reached 3006, errors: 1
- 19244 states, stored (53713 visited)
- 704248 states, matched
- 757961 transitions (= visited+matched)
- 2831420 atomic steps
-hash conflicts: 5063 (resolved)
-
-Stats on memory usage (in Megabytes):
- 1.542 equivalent memory usage for states (stored*(State-vector + overhead))
- 1.605 actual memory usage for states (unsuccessful compression: 104.14%)
- state-vector as stored = 59 byte + 28 byte overhead
- 8.000 memory used for hash table (-w20)
- 457.764 memory used for DFS stack (-m10000000)
- 467.326 total actual memory usage
-
-unreached in proctype urcu_reader
- line 400, "pan.___", state 16, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 48, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 61, "(1)"
- line 419, "pan.___", state 91, "(1)"
- line 400, "pan.___", state 106, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 138, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 151, "(1)"
- line 419, "pan.___", state 181, "(1)"
- line 400, "pan.___", state 197, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 229, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 242, "(1)"
- line 419, "pan.___", state 272, "(1)"
- line 400, "pan.___", state 315, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 347, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 360, "(1)"
- line 419, "pan.___", state 390, "(1)"
- line 541, "pan.___", state 414, "-end-"
- (17 of 414 states)
-unreached in proctype urcu_writer
- line 400, "pan.___", state 14, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 20, "(1)"
- line 404, "pan.___", state 28, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 34, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 404, "pan.___", state 35, "(1)"
- line 402, "pan.___", state 40, "((i<1))"
- line 402, "pan.___", state 40, "((i>=1))"
- line 409, "pan.___", state 46, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 59, "(1)"
- line 410, "pan.___", state 60, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 60, "else"
- line 410, "pan.___", state 63, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 410, "pan.___", state 64, "(1)"
- line 414, "pan.___", state 72, "(1)"
- line 414, "pan.___", state 73, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 73, "else"
- line 414, "pan.___", state 76, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 414, "pan.___", state 77, "(1)"
- line 412, "pan.___", state 82, "((i<1))"
- line 412, "pan.___", state 82, "((i>=1))"
- line 419, "pan.___", state 89, "(1)"
- line 419, "pan.___", state 90, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 90, "else"
- line 419, "pan.___", state 93, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 419, "pan.___", state 94, "(1)"
- line 370, "pan.___", state 99, "(1)"
- line 640, "pan.___", state 103, "cached_generation_ptr.val[_pid] = (old_gen+1)"
- line 638, "pan.___", state 104, "old_gen = cached_generation_ptr.val[_pid]"
- line 400, "pan.___", state 108, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 114, "(1)"
- line 404, "pan.___", state 122, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 128, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 404, "pan.___", state 129, "(1)"
- line 402, "pan.___", state 134, "((i<1))"
- line 402, "pan.___", state 134, "((i>=1))"
- line 410, "pan.___", state 153, "(1)"
- line 410, "pan.___", state 154, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 154, "else"
- line 410, "pan.___", state 157, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 410, "pan.___", state 158, "(1)"
- line 414, "pan.___", state 166, "(1)"
- line 414, "pan.___", state 167, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 167, "else"
- line 414, "pan.___", state 170, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 414, "pan.___", state 171, "(1)"
- line 412, "pan.___", state 176, "((i<1))"
- line 412, "pan.___", state 176, "((i>=1))"
- line 419, "pan.___", state 183, "(1)"
- line 419, "pan.___", state 184, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 184, "else"
- line 419, "pan.___", state 187, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 419, "pan.___", state 188, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 421, "pan.___", state 191, "(1)"
- line 370, "pan.___", state 193, "(1)"
- line 653, "pan.___", state 199, "(1)"
- line 647, "pan.___", state 202, "((write_lock==0))"
- line 647, "pan.___", state 202, "else"
- line 645, "pan.___", state 203, "(1)"
- line 176, "pan.___", state 208, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 217, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 225, "((j<1))"
- line 178, "pan.___", state 225, "((j>=1))"
- line 184, "pan.___", state 230, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 240, "(1)"
- line 165, "pan.___", state 248, "(1)"
- line 165, "pan.___", state 249, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 165, "pan.___", state 249, "else"
- line 163, "pan.___", state 254, "((j<1))"
- line 163, "pan.___", state 254, "((j>=1))"
- line 169, "pan.___", state 260, "(1)"
- line 169, "pan.___", state 261, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 169, "pan.___", state 261, "else"
- line 171, "pan.___", state 264, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 171, "pan.___", state 264, "else"
- line 176, "pan.___", state 271, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 180, "pan.___", state 280, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<i)))"
- line 178, "pan.___", state 288, "((j<1))"
- line 178, "pan.___", state 288, "((j>=1))"
- line 184, "pan.___", state 293, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 303, "(1)"
- line 165, "pan.___", state 311, "(1)"
- line 165, "pan.___", state 312, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<i))))"
- line 165, "pan.___", state 312, "else"
- line 163, "pan.___", state 317, "((j<1))"
- line 163, "pan.___", state 317, "((j>=1))"
- line 169, "pan.___", state 323, "(1)"
- line 169, "pan.___", state 324, "(!((cache_dirty_generation_ptr.bitfield&(1<<i))))"
- line 169, "pan.___", state 324, "else"
- line 171, "pan.___", state 327, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<i))))"
- line 171, "pan.___", state 327, "else"
- line 215, "pan.___", state 333, "((i<1))"
- line 215, "pan.___", state 333, "((i>=1))"
- line 176, "pan.___", state 338, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 347, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 178, "pan.___", state 355, "((j<1))"
- line 178, "pan.___", state 355, "((j>=1))"
- line 184, "pan.___", state 360, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 370, "(1)"
- line 165, "pan.___", state 378, "(1)"
- line 165, "pan.___", state 379, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 165, "pan.___", state 379, "else"
- line 163, "pan.___", state 384, "((j<1))"
- line 163, "pan.___", state 384, "((j>=1))"
- line 169, "pan.___", state 390, "(1)"
- line 169, "pan.___", state 391, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 169, "pan.___", state 391, "else"
- line 171, "pan.___", state 394, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 171, "pan.___", state 394, "else"
- line 400, "pan.___", state 404, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 410, "(1)"
- line 404, "pan.___", state 418, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 424, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 404, "pan.___", state 425, "(1)"
- line 402, "pan.___", state 430, "((i<1))"
- line 402, "pan.___", state 430, "((i>=1))"
- line 409, "pan.___", state 436, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 449, "(1)"
- line 410, "pan.___", state 450, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 450, "else"
- line 410, "pan.___", state 453, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 410, "pan.___", state 454, "(1)"
- line 414, "pan.___", state 462, "(1)"
- line 414, "pan.___", state 463, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 463, "else"
- line 414, "pan.___", state 466, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 414, "pan.___", state 467, "(1)"
- line 412, "pan.___", state 472, "((i<1))"
- line 412, "pan.___", state 472, "((i>=1))"
- line 419, "pan.___", state 479, "(1)"
- line 419, "pan.___", state 480, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 480, "else"
- line 419, "pan.___", state 483, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 419, "pan.___", state 484, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 421, "pan.___", state 487, "(1)"
- line 370, "pan.___", state 489, "(1)"
- line 662, "pan.___", state 492, "cached_urcu_gp_ctr.val[_pid] = (tmp^(1<<7))"
- line 400, "pan.___", state 498, "(1)"
- line 400, "pan.___", state 499, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 499, "else"
- line 400, "pan.___", state 502, "(1)"
- line 404, "pan.___", state 510, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 516, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 404, "pan.___", state 517, "(1)"
- line 402, "pan.___", state 522, "((i<1))"
- line 402, "pan.___", state 522, "((i>=1))"
- line 409, "pan.___", state 528, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 541, "(1)"
- line 410, "pan.___", state 542, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 542, "else"
- line 410, "pan.___", state 545, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 410, "pan.___", state 546, "(1)"
- line 414, "pan.___", state 554, "(1)"
- line 414, "pan.___", state 555, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 555, "else"
- line 414, "pan.___", state 558, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 414, "pan.___", state 559, "(1)"
- line 412, "pan.___", state 564, "((i<1))"
- line 412, "pan.___", state 564, "((i>=1))"
- line 419, "pan.___", state 571, "(1)"
- line 419, "pan.___", state 572, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 572, "else"
- line 419, "pan.___", state 575, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 419, "pan.___", state 576, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 421, "pan.___", state 579, "(1)"
- line 370, "pan.___", state 581, "(1)"
- line 400, "pan.___", state 589, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 595, "(1)"
- line 404, "pan.___", state 603, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 609, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 404, "pan.___", state 610, "(1)"
- line 402, "pan.___", state 615, "((i<1))"
- line 402, "pan.___", state 615, "((i>=1))"
- line 409, "pan.___", state 621, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 634, "(1)"
- line 410, "pan.___", state 635, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 635, "else"
- line 410, "pan.___", state 638, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 410, "pan.___", state 639, "(1)"
- line 414, "pan.___", state 647, "(1)"
- line 414, "pan.___", state 648, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 648, "else"
- line 414, "pan.___", state 651, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 414, "pan.___", state 652, "(1)"
- line 412, "pan.___", state 657, "((i<1))"
- line 412, "pan.___", state 657, "((i>=1))"
- line 419, "pan.___", state 664, "(1)"
- line 419, "pan.___", state 665, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 665, "else"
- line 419, "pan.___", state 668, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 419, "pan.___", state 669, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 421, "pan.___", state 672, "(1)"
- line 370, "pan.___", state 674, "(1)"
- line 400, "pan.___", state 679, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 681, "(1)"
- line 400, "pan.___", state 682, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 682, "else"
- line 400, "pan.___", state 685, "(1)"
- line 404, "pan.___", state 693, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 695, "(1)"
- line 404, "pan.___", state 696, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 696, "else"
- line 404, "pan.___", state 699, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 404, "pan.___", state 700, "(1)"
- line 402, "pan.___", state 705, "((i<1))"
- line 402, "pan.___", state 705, "((i>=1))"
- line 409, "pan.___", state 711, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 724, "(1)"
- line 410, "pan.___", state 725, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 725, "else"
- line 410, "pan.___", state 728, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 410, "pan.___", state 729, "(1)"
- line 414, "pan.___", state 737, "(1)"
- line 414, "pan.___", state 738, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 738, "else"
- line 414, "pan.___", state 741, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 414, "pan.___", state 742, "(1)"
- line 412, "pan.___", state 747, "((i<1))"
- line 412, "pan.___", state 747, "((i>=1))"
- line 419, "pan.___", state 754, "(1)"
- line 419, "pan.___", state 755, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 755, "else"
- line 419, "pan.___", state 758, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 419, "pan.___", state 759, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 421, "pan.___", state 762, "(1)"
- line 370, "pan.___", state 764, "(1)"
- line 430, "pan.___", state 767, "(((tmp2&((1<<7)-1))&&((tmp2^cached_urcu_gp_ctr.val[_pid])&(1<<7))))"
- line 430, "pan.___", state 767, "else"
- line 400, "pan.___", state 777, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 779, "(1)"
- line 400, "pan.___", state 780, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 780, "else"
- line 400, "pan.___", state 783, "(1)"
- line 404, "pan.___", state 791, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 793, "(1)"
- line 404, "pan.___", state 794, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 794, "else"
- line 404, "pan.___", state 797, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 404, "pan.___", state 798, "(1)"
- line 402, "pan.___", state 803, "((i<1))"
- line 402, "pan.___", state 803, "((i>=1))"
- line 409, "pan.___", state 809, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 822, "(1)"
- line 410, "pan.___", state 823, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 823, "else"
- line 410, "pan.___", state 826, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 410, "pan.___", state 827, "(1)"
- line 414, "pan.___", state 835, "(1)"
- line 414, "pan.___", state 836, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 836, "else"
- line 414, "pan.___", state 839, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 414, "pan.___", state 840, "(1)"
- line 412, "pan.___", state 845, "((i<1))"
- line 412, "pan.___", state 845, "((i>=1))"
- line 419, "pan.___", state 852, "(1)"
- line 419, "pan.___", state 853, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 853, "else"
- line 419, "pan.___", state 856, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 419, "pan.___", state 857, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 421, "pan.___", state 860, "(1)"
- line 370, "pan.___", state 862, "(1)"
- line 449, "pan.___", state 870, "((tmp<1))"
- line 449, "pan.___", state 870, "((tmp>=1))"
- line 462, "pan.___", state 873, "tmp = 0"
- line 400, "pan.___", state 877, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 883, "(1)"
- line 404, "pan.___", state 891, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 897, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 404, "pan.___", state 898, "(1)"
- line 402, "pan.___", state 903, "((i<1))"
- line 402, "pan.___", state 903, "((i>=1))"
- line 409, "pan.___", state 909, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 922, "(1)"
- line 410, "pan.___", state 923, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 923, "else"
- line 410, "pan.___", state 926, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 410, "pan.___", state 927, "(1)"
- line 414, "pan.___", state 935, "(1)"
- line 414, "pan.___", state 936, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 936, "else"
- line 414, "pan.___", state 939, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 414, "pan.___", state 940, "(1)"
- line 412, "pan.___", state 945, "((i<1))"
- line 412, "pan.___", state 945, "((i>=1))"
- line 419, "pan.___", state 952, "(1)"
- line 419, "pan.___", state 953, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 953, "else"
- line 419, "pan.___", state 956, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 419, "pan.___", state 957, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 421, "pan.___", state 960, "(1)"
- line 370, "pan.___", state 962, "(1)"
- line 671, "pan.___", state 963, "tmp = cached_urcu_gp_ctr.val[_pid]"
- line 400, "pan.___", state 967, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 973, "(1)"
- line 404, "pan.___", state 981, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 987, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 404, "pan.___", state 988, "(1)"
- line 402, "pan.___", state 993, "((i<1))"
- line 402, "pan.___", state 993, "((i>=1))"
- line 409, "pan.___", state 999, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1012, "(1)"
- line 410, "pan.___", state 1013, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1013, "else"
- line 410, "pan.___", state 1016, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 410, "pan.___", state 1017, "(1)"
- line 414, "pan.___", state 1025, "(1)"
- line 414, "pan.___", state 1026, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1026, "else"
- line 414, "pan.___", state 1029, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 414, "pan.___", state 1030, "(1)"
- line 412, "pan.___", state 1035, "((i<1))"
- line 412, "pan.___", state 1035, "((i>=1))"
- line 419, "pan.___", state 1042, "(1)"
- line 419, "pan.___", state 1043, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1043, "else"
- line 419, "pan.___", state 1046, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 419, "pan.___", state 1047, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 421, "pan.___", state 1050, "(1)"
- line 370, "pan.___", state 1052, "(1)"
- line 400, "pan.___", state 1061, "(1)"
- line 404, "pan.___", state 1073, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1091, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1117, "(1)"
- line 419, "pan.___", state 1134, "(1)"
- line 404, "pan.___", state 1166, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1184, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 414, "pan.___", state 1210, "(1)"
- line 419, "pan.___", state 1227, "(1)"
- line 400, "pan.___", state 1242, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1256, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 409, "pan.___", state 1274, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1287, "(1)"
- line 414, "pan.___", state 1300, "(1)"
- line 419, "pan.___", state 1317, "(1)"
- line 400, "pan.___", state 1340, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 400, "pan.___", state 1342, "(1)"
- line 400, "pan.___", state 1343, "((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid)))"
- line 400, "pan.___", state 1343, "else"
- line 400, "pan.___", state 1346, "(1)"
- line 404, "pan.___", state 1354, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 404, "pan.___", state 1356, "(1)"
- line 404, "pan.___", state 1357, "((cache_dirty_urcu_active_readers.bitfield&(1<<_pid)))"
- line 404, "pan.___", state 1357, "else"
- line 404, "pan.___", state 1360, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 404, "pan.___", state 1361, "(1)"
- line 402, "pan.___", state 1366, "((i<1))"
- line 402, "pan.___", state 1366, "((i>=1))"
- line 409, "pan.___", state 1372, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 410, "pan.___", state 1385, "(1)"
- line 410, "pan.___", state 1386, "(!((cache_dirty_urcu_gp_ctr.bitfield&(1<<_pid))))"
- line 410, "pan.___", state 1386, "else"
- line 410, "pan.___", state 1389, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 410, "pan.___", state 1390, "(1)"
- line 414, "pan.___", state 1398, "(1)"
- line 414, "pan.___", state 1399, "(!((cache_dirty_urcu_active_readers.bitfield&(1<<_pid))))"
- line 414, "pan.___", state 1399, "else"
- line 414, "pan.___", state 1402, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 414, "pan.___", state 1403, "(1)"
- line 412, "pan.___", state 1408, "((i<1))"
- line 412, "pan.___", state 1408, "((i>=1))"
- line 419, "pan.___", state 1415, "(1)"
- line 419, "pan.___", state 1416, "(!((cache_dirty_generation_ptr.bitfield&(1<<_pid))))"
- line 419, "pan.___", state 1416, "else"
- line 419, "pan.___", state 1419, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 419, "pan.___", state 1420, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 421, "pan.___", state 1423, "(1)"
- line 180, "pan.___", state 1448, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 184, "pan.___", state 1461, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 1471, "(1)"
- line 165, "pan.___", state 1479, "(1)"
- line 169, "pan.___", state 1491, "(1)"
- line 176, "pan.___", state 1502, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<i)))"
- line 184, "pan.___", state 1524, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<i)))"
- line 161, "pan.___", state 1534, "(1)"
- line 165, "pan.___", state 1542, "(1)"
- line 169, "pan.___", state 1554, "(1)"
- line 176, "pan.___", state 1569, "cache_dirty_urcu_gp_ctr.bitfield = (cache_dirty_urcu_gp_ctr.bitfield&~((1<<_pid)))"
- line 180, "pan.___", state 1578, "cache_dirty_urcu_active_readers.bitfield = (cache_dirty_urcu_active_readers.bitfield&~((1<<_pid)))"
- line 184, "pan.___", state 1591, "cache_dirty_generation_ptr.bitfield = (cache_dirty_generation_ptr.bitfield&~((1<<_pid)))"
- line 161, "pan.___", state 1601, "(1)"
- line 165, "pan.___", state 1609, "(1)"
- line 169, "pan.___", state 1621, "(1)"
- line 370, "pan.___", state 1642, "(1)"
- line 696, "pan.___", state 1643, "(1)"
- line 703, "pan.___", state 1646, "-end-"
- (308 of 1646 states)
-unreached in proctype :init:
- (0 of 46 states)
-unreached in proctype :never:
- line 752, "pan.___", state 11, "-end-"
- (1 of 11 states)
-
-pan: elapsed time 0.65 seconds
-pan: rate 82635.385 states/second
-pan: avg transition delay 8.5756e-07 usec
-cp .input.spin urcu_progress_writer_error.spin.input
-cp .input.spin.trail urcu_progress_writer_error.spin.input.trail
-make[1]: Leaving directory `/home/compudj/doc/userspace-rcu/formal-model/urcu'
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
-
-#define read_free_race (read_generation[0] == last_free_gen)
-#define read_free (free_done && data_access[0])
-
-//#define TEST_SIGNAL
-//#define TEST_SIGNAL_ON_READ
-//#define TEST_SIGNAL_ON_WRITE
-
-#define RCU_GP_CTR_BIT (1 << 7)
-#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
-
-#ifndef READER_NEST_LEVEL
-#define READER_NEST_LEVEL 1
-//#define READER_NEST_LEVEL 2
-#endif
-
-#define REMOTE_BARRIERS
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
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+++ /dev/null
-#!/bin/sh
-#
-# Compiles and runs the urcu.spin Promela model.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# Copyright (C) IBM Corporation, 2009
-# Mathieu Desnoyers, 2009
-#
-# Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-# Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
-
-# Basic execution, without LTL clauses. See Makefile.
-
-spin -a urcu.spin
-cc -DSAFETY -o pan pan.c
-./pan -v -c1 -X -m10000000 -w21
+++ /dev/null
-/*
- * mem.spin: Promela code to validate memory barriers with OOO memory.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2009 Mathieu Desnoyers
- */
-
-/* Promela validation variables. */
-
-/* specific defines "included" here */
-/* DEFINES file "included" here */
-
-/* All signal readers have same PID and uses same reader variable */
-#ifdef TEST_SIGNAL_ON_WRITE
-
-#define NR_READERS 1 /* the writer is also a signal reader */
-#define NR_WRITERS 1
-
-#define NR_PROCS 1
-
-#define get_pid() (0)
-
-#elif defined(TEST_SIGNAL_ON_READ)
-
-#define get_pid() ((_pid < 2) -> 0 : 1)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#else
-
-#define get_pid() (_pid)
-
-#define NR_READERS 1
-#define NR_WRITERS 1
-
-#define NR_PROCS 2
-
-#endif
-
-#define get_readerid() (get_pid())
-
-/*
- * Each process have its own data in cache. Caches are randomly updated.
- * smp_wmb and smp_rmb forces cache updates (write and read), smp_mb forces
- * both.
- */
-
-typedef per_proc_byte {
- byte val[NR_PROCS];
-};
-
-/* Bitfield has a maximum of 8 procs */
-typedef per_proc_bit {
- byte bitfield;
-};
-
-#define DECLARE_CACHED_VAR(type, x) \
- type mem_##x; \
- per_proc_##type cached_##x; \
- per_proc_bit cache_dirty_##x;
-
-#define INIT_CACHED_VAR(x, v, j) \
- mem_##x = v; \
- cache_dirty_##x.bitfield = 0; \
- j = 0; \
- do \
- :: j < NR_PROCS -> \
- cached_##x.val[j] = v; \
- j++ \
- :: j >= NR_PROCS -> break \
- od;
-
-#define IS_CACHE_DIRTY(x, id) (cache_dirty_##x.bitfield & (1 << id))
-
-#define READ_CACHED_VAR(x) (cached_##x.val[get_pid()])
-
-#define WRITE_CACHED_VAR(x, v) \
- atomic { \
- cached_##x.val[get_pid()] = v; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield | (1 << get_pid()); \
- }
-
-#define CACHE_WRITE_TO_MEM(x, id) \
- if \
- :: IS_CACHE_DIRTY(x, id) -> \
- mem_##x = cached_##x.val[id]; \
- cache_dirty_##x.bitfield = \
- cache_dirty_##x.bitfield & (~(1 << id)); \
- :: else -> \
- skip \
- fi;
-
-#define CACHE_READ_FROM_MEM(x, id) \
- if \
- :: !IS_CACHE_DIRTY(x, id) -> \
- cached_##x.val[id] = mem_##x;\
- :: else -> \
- skip \
- fi;
-
-/*
- * May update other caches if cache is dirty, or not.
- */
-#define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
- if \
- :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-#define RANDOM_CACHE_READ_FROM_MEM(x, id)\
- if \
- :: 1 -> CACHE_READ_FROM_MEM(x, id); \
- :: 1 -> skip \
- fi;
-
-/*
- * Remote barriers tests the scheme where a signal (or IPI) is sent to all
- * reader threads to promote their compiler barrier to a smp_mb().
- */
-#ifdef REMOTE_BARRIERS
-
-inline smp_rmb_pid(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, i);
- }
-}
-
-inline smp_wmb_pid(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, i);
- j = 0;
- do
- :: j < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[j], i);
- j++
- :: j >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, i);
- }
-}
-
-inline smp_mb_pid(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb_pid(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb_pid(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(j);
-#endif
-#endif
- }
-}
-
-/*
- * Readers do a simple barrier(), writers are doing a smp_mb() _and_ sending a
- * signal or IPI to have all readers execute a smp_mb.
- * We are not modeling the whole rendez-vous between readers and writers here,
- * we just let the writer update each reader's caches remotely.
- */
-inline smp_mb_writer(i, j)
-{
- smp_mb_pid(get_pid(), j);
- i = 0;
- do
- :: i < NR_READERS ->
- smp_mb_pid(i, j);
- i++;
- :: i >= NR_READERS -> break
- od;
- smp_mb_pid(get_pid(), j);
-}
-
-inline smp_mb_reader(i, j)
-{
- skip;
-}
-
-#else
-
-inline smp_rmb(i, j)
-{
- atomic {
- CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_READ_FROM_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_wmb(i, j)
-{
- atomic {
- CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- CACHE_WRITE_TO_MEM(urcu_active_readers[i], get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- }
-}
-
-inline smp_mb(i, j)
-{
- atomic {
-#ifndef NO_WMB
- smp_wmb(i, j);
-#endif
-#ifndef NO_RMB
- smp_rmb(i, j);
-#endif
-#ifdef NO_WMB
-#ifdef NO_RMB
- ooo_mem(i);
-#endif
-#endif
- }
-}
-
-inline smp_mb_writer(i, j)
-{
- smp_mb(i, j);
-}
-
-inline smp_mb_reader(i, j)
-{
- smp_mb(i, j);
-}
-
-#endif
-
-/* Keep in sync manually with smp_rmb, wmp_wmb, ooo_mem and init() */
-DECLARE_CACHED_VAR(byte, urcu_gp_ctr);
-/* Note ! currently only two readers */
-DECLARE_CACHED_VAR(byte, urcu_active_readers[NR_READERS]);
-/* pointer generation */
-DECLARE_CACHED_VAR(byte, generation_ptr);
-
-byte last_free_gen = 0;
-bit free_done = 0;
-byte read_generation[NR_READERS];
-bit data_access[NR_READERS];
-
-bit write_lock = 0;
-
-bit init_done = 0;
-
-bit sighand_exec = 0;
-
-inline wait_init_done()
-{
- do
- :: init_done == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TEST_SIGNAL
-
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else -> break;
- od;
-}
-
-#ifdef TOO_BIG_STATE_SPACE
-inline wait_for_sighand_exec()
-{
- sighand_exec = 0;
- do
- :: sighand_exec == 0 -> skip;
- :: else ->
- if
- :: 1 -> break;
- :: 1 -> sighand_exec = 0;
- skip;
- fi;
- od;
-}
-#endif
-
-#else
-
-inline wait_for_sighand_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_WRITE
-/* Block on signal handler execution */
-inline dispatch_sighand_write_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_write_exec()
-{
- skip;
-}
-
-#endif
-
-#ifdef TEST_SIGNAL_ON_READ
-/* Block on signal handler execution */
-inline dispatch_sighand_read_exec()
-{
- sighand_exec = 1;
- do
- :: sighand_exec == 1 ->
- skip;
- :: else ->
- break;
- od;
-}
-
-#else
-
-inline dispatch_sighand_read_exec()
-{
- skip;
-}
-
-#endif
-
-
-inline ooo_mem(i)
-{
- atomic {
- RANDOM_CACHE_WRITE_TO_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_WRITE_TO_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_WRITE_TO_MEM(generation_ptr, get_pid());
- RANDOM_CACHE_READ_FROM_MEM(urcu_gp_ctr, get_pid());
- i = 0;
- do
- :: i < NR_READERS ->
- RANDOM_CACHE_READ_FROM_MEM(urcu_active_readers[i],
- get_pid());
- i++
- :: i >= NR_READERS -> break
- od;
- RANDOM_CACHE_READ_FROM_MEM(generation_ptr, get_pid());
- }
-}
-
-inline wait_for_reader(tmp, tmp2, i, j)
-{
- do
- :: 1 ->
- tmp2 = READ_CACHED_VAR(urcu_active_readers[tmp]);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- if
- :: (tmp2 & RCU_GP_CTR_NEST_MASK)
- && ((tmp2 ^ READ_CACHED_VAR(urcu_gp_ctr))
- & RCU_GP_CTR_BIT) ->
-#ifndef GEN_ERROR_WRITER_PROGRESS
- smp_mb_writer(i, j);
-#else
- ooo_mem(i);
-#endif
- dispatch_sighand_write_exec();
- :: else ->
- break;
- fi;
- od;
-}
-
-inline wait_for_quiescent_state(tmp, tmp2, i, j)
-{
- tmp = 0;
- do
- :: tmp < NR_READERS ->
- wait_for_reader(tmp, tmp2, i, j);
- if
- :: (NR_READERS > 1) && (tmp < NR_READERS - 1)
- -> ooo_mem(i);
- dispatch_sighand_write_exec();
- :: else
- -> skip;
- fi;
- tmp++
- :: tmp >= NR_READERS -> break
- od;
-}
-
-/* Model the RCU read-side critical section. */
-
-#ifndef TEST_SIGNAL_ON_WRITE
-
-inline urcu_one_read(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- dispatch_sighand_read_exec();
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- dispatch_sighand_read_exec();
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- dispatch_sighand_read_exec();
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //dispatch_sighand_read_exec();
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif //!TEST_SIGNAL_ON_WRITE
-
-#ifdef TEST_SIGNAL
-/* signal handler reader */
-
-inline urcu_one_read_sig(i, j, nest_i, tmp, tmp2)
-{
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- ooo_mem(i);
- tmp = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- if
- :: (!(tmp & RCU_GP_CTR_NEST_MASK))
- ->
- tmp2 = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp2);
- :: else ->
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()],
- tmp + 1);
- fi;
- smp_mb_reader(i, j);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
-
- read_generation[get_readerid()] = READ_CACHED_VAR(generation_ptr);
- data_access[get_readerid()] = 1;
- data_access[get_readerid()] = 0;
-
- nest_i = 0;
- do
- :: nest_i < READER_NEST_LEVEL ->
- smp_mb_reader(i, j);
- tmp2 = READ_CACHED_VAR(urcu_active_readers[get_readerid()]);
- ooo_mem(i);
- WRITE_CACHED_VAR(urcu_active_readers[get_readerid()], tmp2 - 1);
- nest_i++;
- :: nest_i >= READER_NEST_LEVEL -> break;
- od;
- //ooo_mem(i);
- //smp_mc(i); /* added */
-}
-
-active proctype urcu_reader_sig()
-{
- byte i, j, nest_i;
- byte tmp, tmp2;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
-end_reader:
- do
- :: 1 ->
- wait_for_sighand_exec();
- /*
- * We do not test reader's progress here, because we are mainly
- * interested in writer's progress. The reader never blocks
- * anyway. We have to test for reader/writer's progress
- * separately, otherwise we could think the writer is doing
- * progress when it's blocked by an always progressing reader.
- */
-#ifdef READER_PROGRESS
-progress_reader:
-#endif
- urcu_one_read_sig(i, j, nest_i, tmp, tmp2);
- od;
-}
-
-#endif
-
-/* Model the RCU update process. */
-
-active proctype urcu_writer()
-{
- byte i, j;
- byte tmp, tmp2;
- byte old_gen;
-
- wait_init_done();
-
- assert(get_pid() < NR_PROCS);
-
- do
- :: (READ_CACHED_VAR(generation_ptr) < 5) ->
-#ifdef WRITER_PROGRESS
-progress_writer1:
-#endif
- ooo_mem(i);
- dispatch_sighand_write_exec();
- atomic {
- old_gen = READ_CACHED_VAR(generation_ptr);
- WRITE_CACHED_VAR(generation_ptr, old_gen + 1);
- }
- ooo_mem(i);
- dispatch_sighand_write_exec();
-
- do
- :: 1 ->
- atomic {
- if
- :: write_lock == 0 ->
- write_lock = 1;
- break;
- :: else ->
- skip;
- fi;
- }
- od;
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- //smp_mc(i);
- wait_for_quiescent_state(tmp, tmp2, i, j);
- //smp_mc(i);
-#ifndef SINGLE_FLIP
- ooo_mem(i);
- dispatch_sighand_write_exec();
- tmp = READ_CACHED_VAR(urcu_gp_ctr);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- WRITE_CACHED_VAR(urcu_gp_ctr, tmp ^ RCU_GP_CTR_BIT);
- //smp_mc(i);
- ooo_mem(i);
- dispatch_sighand_write_exec();
- wait_for_quiescent_state(tmp, tmp2, i, j);
-#endif
- smp_mb_writer(i, j);
- dispatch_sighand_write_exec();
- write_lock = 0;
- /* free-up step, e.g., kfree(). */
- atomic {
- last_free_gen = old_gen;
- free_done = 1;
- }
- :: else -> break;
- od;
- /*
- * Given the reader loops infinitely, let the writer also busy-loop
- * with progress here so, with weak fairness, we can test the
- * writer's progress.
- */
-end_writer:
- do
- :: 1 ->
-#ifdef WRITER_PROGRESS
-progress_writer2:
-#endif
- dispatch_sighand_write_exec();
- od;
-}
-
-/* Leave after the readers and writers so the pid count is ok. */
-init {
- byte i, j;
-
- atomic {
- INIT_CACHED_VAR(urcu_gp_ctr, 1, j);
- INIT_CACHED_VAR(generation_ptr, 0, j);
-
- i = 0;
- do
- :: i < NR_READERS ->
- INIT_CACHED_VAR(urcu_active_readers[i], 0, j);
- read_generation[i] = 1;
- data_access[i] = 0;
- i++;
- :: i >= NR_READERS -> break
- od;
- init_done = 1;
- }
-}
+++ /dev/null
-[] (read_free -> !read_free_race)
+++ /dev/null
-#define NO_RMB
-#define NO_WMB
+++ /dev/null
-#define NO_RMB
+++ /dev/null
-#define NO_WMB
+++ /dev/null
-#define SINGLE_FLIP
+++ /dev/null
-([] <> !np_)
+++ /dev/null
-#define READER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
+++ /dev/null
-#define WRITER_PROGRESS
-#define GEN_ERROR_WRITER_PROGRESS
projects / userspace-rcu.git / commitdiff
